src/weapon/beam.cpp

   1 /*
   2  * Copyright (C) Volition, Inc. 1999.  All rights reserved.
   3  *
   4  * All source code herein is the property of Volition, Inc. You may not sell
   5  * or otherwise commercially exploit the source or things you created based on
   6  * the source.
   7  */
   8
   9 /*
  10  * $Logfile: /Freespace2/code/Weapon/Beam.cpp $
  11  * $Revision$
  12  * $Date$
  13  * $Author$
  14  *
  15  * all sorts of cool stuff about ships
  16  *
  17  * $Log$
  18  * Revision 1.7  2004/09/20 01:31:45  theoddone33
  19  * GCC 3.4 fixes.
  20  *
  21  * Revision 1.6  2003/05/25 02:30:44  taylor
  22  * Freespace 1 support
  23  *
  24  * Revision 1.5  2002/06/17 06:33:11  relnev
  25  * ryan's struct patch for gcc 2.95
  26  *
  27  * Revision 1.4  2002/06/09 04:41:29  relnev
  28  * added copyright header
  29  *
  30  * Revision 1.3  2002/06/02 00:31:36  relnev
  31  * implemented osregistry
  32  *
  33  * Revision 1.2  2002/05/07 03:16:53  theoddone33
  34  * The Great Newline Fix
  35  *
  36  * Revision 1.1.1.1  2002/05/03 03:28:11  root
  37  * Initial import.
  38  *
  39  *
  40  * 68    9/09/99 11:40p Dave
  41  * Handle an SDL_assert() in beam code. Added supernova sounds. Play the right
  42  * 2 end movies properly, based upon what the player did in the mission.
  43  *
  44  * 67    9/09/99 2:36p Mikek
  45  * Put back in the "1.0f +" in BEAM_TYPE_A aiming.  Not the best way to
  46  * correct this.
  47  *
  48  * 65    9/08/99 10:29p Dave
  49  * Make beam sound pausing and unpausing much safer.
  50  *
  51  * 64    9/06/99 12:46a Andsager
  52  * Add weapon_explosion_ani LOD
  53  *
  54  * 63    9/03/99 5:12p Mikek
  55  * Change miss_factor code, making it a lot more likely for beams to miss
  56  * and also making them increasingly likely to miss with each subsequent
  57  * shot in the multi-shot burst.
  58  *
  59  * 62    8/30/99 5:01p Dave
  60  * Made d3d do less state changing in the nebula. Use new chat server for
  61  * PXO.
  62  *
  63  * 61    8/28/99 7:29p Dave
  64  * Fixed wingmen persona messaging. Make sure locked turrets don't count
  65  * towards the # attacking a player.
  66  *
  67  * 60    8/27/99 9:07p Dave
  68  * LOD explosions. Improved beam weapon accuracy.
  69  *
  70  * 59    8/26/99 10:15a Dave
  71  * Don't apply beam whacks to docked ships.
  72  *
  73  * 58    7/31/99 1:16p Dave
  74  * Use larger font for 1024 HUD flash text box. Make beam weapons aware of
  75  * weapon subsystem damage on firing ship.
  76  *
  77  * 57    7/22/99 4:00p Dave
  78  * Fixed beam weapon muzzle glow rendering. Externalized hud shield info.
  79  *
  80  * 56    7/19/99 7:20p Dave
  81  * Beam tooling. Specialized player-killed-self messages. Fixed d3d nebula
  82  * pre-rendering.
  83  *
  84  * 55    7/15/99 9:20a Andsager
  85  * FS2_DEMO initial checkin
  86  *
  87  * 54    7/09/99 5:54p Dave
  88  * Seperated cruiser types into individual types. Added tons of new
  89  * briefing icons. Campaign screen.
  90  *
  91  * 53    7/08/99 10:53a Dave
  92  * New multiplayer interpolation scheme. Not 100% done yet, but still
  93  * better than the old way.
  94  *
  95  * 52    7/02/99 10:51p Dave
  96  * Limit friendly beam fire damage. :(
  97  *
  98  * 51    7/01/99 11:44a Dave
  99  * Updated object sound system to allow multiple obj sounds per ship.
 100  * Added hit-by-beam sound. Added killed by beam sound.
 101  *
 102  * 50    6/29/99 7:39p Dave
 103  * Lots of small bug fixes.
 104  *
 105  * 49    6/29/99 2:53p Dave
 106  * Re-enabled beam lighting.
 107  *
 108  * 48    6/25/99 3:04p Dave
 109  * Removed Int3().
 110  *
 111  * 47    6/24/99 3:00p Dave
 112  * Stupid bug.
 113  *
 114  * 46    6/23/99 4:49p Dave
 115  * Temporarily removed beam lighting.
 116  *
 117  * 45    6/21/99 7:25p Dave
 118  * netplayer pain packet. Added type E unmoving beams.
 119  *
 120  * 44    6/18/99 5:16p Dave
 121  * Added real beam weapon lighting. Fixed beam weapon sounds. Added MOTD
 122  * dialog to PXO screen.
 123  *
 124  * 43    6/14/99 10:45a Dave
 125  * Made beam weapons specify accuracy by skill level in the weapons.tbl
 126  *
 127  * 42    6/09/99 2:55p Andsager
 128  * Allow multiple asteroid subtypes (of large, medium, small) and follow
 129  * family.
 130  *
 131  * 41    6/08/99 6:02p Jamesa
 132  * Handle case where type B beam start and end directions are really
 133  * close.
 134  *
 135  * 40    6/04/99 2:16p Dave
 136  * Put in shrink effect for beam weapons.
 137  *
 138  * 39    5/14/99 11:47a Andsager
 139  * Added  beam_get_weapon_info_index(object *bm)
 140  *
 141  * 38    5/12/99 10:43a Andsager
 142  * Increase max beam length
 143  *
 144  * 37    5/08/99 8:25p Dave
 145  * Upped object pairs. First run of nebula lightning.
 146  *
 147  * 36    5/05/99 9:02p Dave
 148  * Fixed D3D aabitmap rendering. Spiffed up nebula effect a bit (added
 149  * rotations, tweaked values, made bitmap selection more random). Fixed
 150  * D3D beam weapon clipping problem. Added D3d frame dumping.
 151  *
 152  * 35    5/03/99 9:07a Dave
 153  * Pirate Bob. Changed beam test code a bit.
 154  *
 155  * 34    4/27/99 12:16a Dave
 156  * Fixed beam weapon muzzle glow problem. Fixed premature timeout on the
 157  * pxo server list screen. Fixed secondary firing for hosts on a
 158  * standalone. Fixed wacky multiplayer weapon "shuddering" problem.
 159  *
 160  * 33    4/25/99 6:12p Johnson
 161  * Fixed bug where multi-shot beams were getting the shot count from the
 162  * wrong place.
 163  *
 164  * 32    4/25/99 3:36p Dave
 165  * Fixed nebula table code. Tweaked beam weapon explosion stuff.
 166  *
 167  * 31    4/23/99 2:33p Johnson
 168  * Allow beams to shoot at missiles properly.
 169  *
 170  * 30    4/23/99 12:01p Johnson
 171  * Added SIF_HUGE_SHIP
 172  *
 173  * 29    4/22/99 11:06p Dave
 174  * Final pass at beam weapons. Solidified a lot of stuff. All that remains
 175  * now is to tweak and fix bugs as they come up. No new beam weapon
 176  * features.
 177  *
 178  * 28    4/21/99 6:15p Dave
 179  * Did some serious housecleaning in the beam code. Made it ready to go
 180  * for anti-fighter "pulse" weapons. Fixed collision pair creation. Added
 181  * a handy macro for recalculating collision pairs for a given object.
 182  *
 183  * 27    4/20/99 6:39p Dave
 184  * Almost done with artillery targeting. Added support for downloading
 185  * images on the PXO screen.
 186  *
 187  * 26    4/19/99 11:01p Dave
 188  * More sophisticated targeting laser support. Temporary checkin.
 189  *
 190  * 25    4/19/99 4:54p Johnson
 191  * Removed infinite loop from beam_render_all()   oops :)
 192  *
 193  * 24    4/16/99 5:54p Dave
 194  * Support for on/off style "stream" weapons. Real early support for
 195  * target-painting lasers.
 196  *
 197  * 23    4/04/99 2:13p Dave
 198  * Put in area effect beam weapons. May be a bit too expensive though.
 199  * Dave
 200  * 22    4/02/99 9:55a Dave
 201  * Added a few more options in the weapons.tbl for beam weapons. Attempt
 202  * at putting "pain" packets into multiplayer.
 203  *
 204  * 21    3/31/99 8:24p Dave
 205  * Beefed up all kinds of stuff, incluging beam weapons, nebula effects
 206  * and background nebulae. Added per-ship non-dimming pixel colors.
 207  *
 208  * 20    3/08/99 7:03p Dave
 209  * First run of new object update system. Looks very promising.
 210  *
 211  * 19    3/04/99 6:09p Dave
 212  * Added in sexpressions for firing beams and checking for if a ship is
 213  * tagged.
 214  *
 215  * 18    3/02/99 9:25p Dave
 216  * Added a bunch of model rendering debug code. Started work on fixing
 217  * beam weapon wacky firing.
 218  *
 219  * 17    2/21/99 1:48p Dave
 220  * Some code for monitoring datarate for multiplayer in detail.
 221  *
 222  * 16    2/11/99 3:08p Dave
 223  * PXO refresh button. Very preliminary squad war support.
 224  *
 225  * 15    2/05/99 3:23p Mattf
 226  * Made beams a little more forgiving when checking object types.
 227  *
 228  * 14    2/05/99 12:52p Dave
 229  * Fixed Glide nondarkening textures.
 230  *
 231  * 13    2/04/99 6:29p Dave
 232  * First full working rev of FS2 PXO support.  Fixed Glide lighting
 233  * problems.
 234  *
 235  * 12    1/30/99 9:02p Dave
 236  * Fixed neb stuff.
 237  *
 238  * 11    1/30/99 1:29a Dave
 239  * Fixed nebula thumbnail problem. Full support for 1024x768 choose pilot
 240  * screen.  Fixed beam weapon death messages.
 241  *
 242  * 10    1/29/99 7:08p Johnson
 243  * Put in fix for beam weapons which are on dying ships.
 244  *
 245  * 9     1/29/99 12:47a Dave
 246  * Put in sounds for beam weapon. A bunch of interface screens (tech
 247  * database stuff).
 248  *
 249  * 8     1/27/99 9:56a Dave
 250  * Temporary checkin of beam weapons for Dan to make cool sounds.
 251  *
 252  * 7     1/24/99 11:37p Dave
 253  * First full rev of beam weapons. Very customizable. Removed some bogus
 254  * Int3()'s in low level net code.
 255  *
 256  * 6     1/21/99 2:06p Dave
 257  * Final checkin for multiplayer testing.
 258  *
 259  * 5     1/21/99 10:45a Dave
 260  * More beam weapon stuff. Put in warmdown time.
 261  *
 262  * 4     1/14/99 12:48a Dave
 263  * Todo list bug fixes. Made a pass at putting briefing icons back into
 264  * FRED. Sort of works :(
 265  *
 266  * 3     1/12/99 12:53a Dave
 267  * More work on beam weapons - made collision detection very efficient -
 268  * collide against all object types properly - made 3 movement types
 269  * smooth. Put in test code to check for possible non-darkening pixels on
 270  * object textures.
 271  *
 272  * 2     1/08/99 2:08p Dave
 273  * Fixed software rendering for pofview. Super early support for AWACS and
 274  * beam weapons.
 275  *
 276  *
 277  * $NoKeywords: $
 278  */
 279
 280 #include "linklist.h"
 281 #include "object.h"
 282 #include "objcollide.h"
 283 #include "ship.h"
 284 #include "freespace.h"
 285 #include "3d.h"
 286 #include "model.h"
 287 #include "alphacolors.h"
 288 #include "timer.h"
 289 #include "fireballs.h"
 290 #include "debris.h"
 291 #include "asteroid.h"
 292 #include "multi.h"
 293 #include "multimsgs.h"
 294 #include "bmpman.h"
 295 #include "particle.h"
 296 #include "shiphit.h"
 297 #include "flak.h"
 298 #include "3d.h"
 299 #include "gamesnd.h"
 300 #include "beam.h"
 301 #include "hudmessage.h"
 302 #include "key.h"
 303 #include "lighting.h"
 304
 305 // ------------------------------------------------------------------------------------------------
 306 // BEAM WEAPON DEFINES/VARS
 307 //
 308
 309 // use this to extend a beam to "infinity"
 310 #define BEAM_FAR_LENGTH                         30000.0f
 311
 312 // this is the constant which defines when a beam is an "area" beam. meaning, when we switch on sphereline checking and when
 313 // a beam gets "stopped" by an object. It is a percentage of the object radius which the beam must be wider than
 314 #define BEAM_AREA_PERCENT                       0.4f
 315
 316 // randomness factor - all beam weapon aiming is adjusted by +/- some factor within this range
 317 #define BEAM_RANDOM_FACTOR                      0.4f
 318
 319 #define MAX_BEAMS                                               40
 320 #define BEAM_DAMAGE_TIME                        170                     // apply damage
 321 #define MAX_SHOT_POINTS                         30
 322 #define SHOT_POINT_TIME                         200                     // 5 arcs a second
 323
 324 #define TOOLTIME                                                1500.0f
 325
 326 // max # of collisions we'll allow per frame
 327 #define MAX_FRAME_COLLISIONS            5
 328
 329 // beam flag defines
 330 #define BF_SAFETY                                               (1<<0)          // if this is set, don't collide or render for this frame. lifetime still increases though
 331 #define BF_SHRINK                                               (1<<1)          // if this is set, the beam is in the warmdown phase
 332
 333 // beam struct (the actual weapon/object)
 334 typedef struct beam {
 335         // low-level data
 336         int             objnum;                                 // our own objnum
 337         int             weapon_info_index;
 338         int             sig;                                            // signature for the shooting object
 339         object  *objp;                                  // the shooting object (who owns the turret that I am being fired from)
 340         object  *target;                                        // target object
 341         ship_subsys *target_subsys;     // targeted subsys
 342         int             target_sig;                             // target sig
 343         ship_subsys *subsys;                            // subsys its being fired from
 344         beam            *next, *prev;                   // link list stuff
 345         vector  targeting_laser_offset;
 346         int             framecount;                             // how many frames the beam has been active
 347         int             flags;                                  // see BF_* defines
 348         float           shrink;                                 // shrink factor
 349
 350         // beam info
 351         int             warmup_stamp;                   // timestamp for "warming up"
 352         int             warmdown_stamp;         // timestamp for "warming down"
 353         int             type;                                           // see BEAM_TYPE_* defines in beam.h
 354         float           life_left;                              // in seconds
 355         float           life_total;                             // total life
 356         // this vector has very special meaning. BEFORE performing collision checks, it basically implies a "direction". meaning
 357         // the vector between it and last_start is where the beam will be aiming. AFTER performing collision checks, it is the
 358         // literal world collision point on the object (or meaningless, if we hit nothing). The function beam_move_all_pre() is
 359         // responsible for then setting it up pre-collision time
 360         vector  last_shot;
 361         vector  last_start;
 362         int             shot_index;                             // for type D beam weapons
 363
 364         // recent collisions
 365         beam_collision r_collisions[MAX_FRAME_COLLISIONS];                                      // recent collisions
 366         int r_collision_count;                                                                                                          // # of recent collisions
 367
 368         // collision info for this frame
 369         beam_collision f_collisions[MAX_FRAME_COLLISIONS];                                      // collisions for the current frame
 370         int f_collision_count;                                                                                                          // # of collisions we recorded this frame
 371
 372         // looping sound info, HANDLE
 373         int             beam_sound_loop;                // -1 if none
 374
 375         // team
 376         char            team;
 377
 378         // exactly how the beam will behave. by passing this is multiplayer from server to client, we can ensure that
 379         // everything looks the same
 380         beam_info binfo;
 381 } beam;
 382
 383 beam Beams[MAX_BEAMS];                          // all beams
 384 beam Beam_free_list;                                    // free beams
 385 beam Beam_used_list;                                    // used beams
 386 int Beam_count = 0;                                     // how many beams are in use
 387
 388 // octant indices. These are "good" pairs of octants to use for beam target
 389 #define BEAM_NUM_GOOD_OCTANTS                   8
 390 int Beam_good_slash_octants[BEAM_NUM_GOOD_OCTANTS][4] = {
 391         { 2, 5, 1, 0 },                                 // octant, octant, min/max pt, min/max pt
 392         { 7, 0, 1, 0 },
 393         { 1, 6, 1, 0 },
 394         { 6, 1, 0, 1 },
 395         { 5, 2, 0, 1 },
 396         { 0, 7, 0, 1 },
 397         { 7, 1, 1, 0 },
 398         { 6, 0, 1, 0 },
 399 };
 400 int Beam_good_shot_octants[BEAM_NUM_GOOD_OCTANTS][4] = {
 401         { 5, 0, 1, 0 },                                 // octant, octant, min/max pt, min/max pt
 402         { 7, 2, 1, 0 },
 403         { 7, 1, 1, 0 },
 404         { 6, 0, 1, 0 },
 405         { 7, 3, 1, 0 },
 406         { 6, 2, 1, 0 },
 407         { 5, 1, 1, 0 },
 408         { 4, 0, 1, 0 },
 409 };
 410
 411 // damage cap values for friendly beam fire
 412 float Beam_friendly_cap[NUM_SKILL_LEVELS] = { 0.0f, 5.0f, 10.0f, 20.0f, 30.0f };
 413
 414 // beam lighting effects
 415 int Beam_lighting = 1;
 416
 417 // debug stuff - keep track of how many collision tests we perform a second and how many we toss a second
 418 #define BEAM_TEST_STAMP_TIME            4000    // every 4 seconds
 419 int Beam_test_stamp = -1;
 420 int Beam_test_ints = 0;
 421 int Beam_test_ship = 0;
 422 int Beam_test_ast = 0;
 423 int Beam_test_framecount = 0;
 424
 425 // beam warmup completion %
 426 #define BEAM_WARMUP_PCT(b)                      ( ((float)Weapon_info[b->weapon_info_index].b_info.beam_warmup - (float)timestamp_until(b->warmup_stamp)) / (float)Weapon_info[b->weapon_info_index].b_info.beam_warmup )
 427
 428 // beam warmdown completion %
 429 #define BEAM_WARMDOWN_PCT(b)            ( ((float)Weapon_info[b->weapon_info_index].b_info.beam_warmdown - (float)timestamp_until(b->warmdown_stamp)) / (float)Weapon_info[b->weapon_info_index].b_info.beam_warmdown )
 430
 431 // timestamp for spewing muzzle particles
 432 int Beam_muzzle_stamp = -1;
 433
 434 // link into the physics paused system
 435 extern int physics_paused;
 436
 437 // beam lighting info
 438 #define MAX_BEAM_LIGHT_INFO             100
 439 typedef struct beam_light_info {
 440         beam *bm;                                       // beam casting the light
 441         int objnum;                                     // object getting light cast on it
 442         ubyte source;                           // 0 to light the shooter, 1 for lighting any ship the beam passes, 2 to light the collision ship
 443         vector c_point;                 // collision point for type 2 lights
 444 } beam_light_info;
 445
 446 beam_light_info Beam_lights[MAX_BEAM_LIGHT_INFO];
 447 int Beam_light_count = 0;
 448
 449 float b_whack_small = 500.0f;
 450 float b_whack_big = 1500.0f;
 451 float b_whack_damage = 150.0f;
 452 DCF(b_whack_small, "")
 453 {
 454         dc_get_arg(ARG_FLOAT);
 455         b_whack_small = Dc_arg_float;
 456 }
 457 DCF(b_whack_big, "")
 458 {
 459         dc_get_arg(ARG_FLOAT);
 460         b_whack_big = Dc_arg_float;
 461 }
 462 DCF(b_whack_damage, "")
 463 {
 464         dc_get_arg(ARG_FLOAT);
 465         b_whack_damage = Dc_arg_float;
 466 }
 467
 468
 469 // ------------------------------------------------------------------------------------------------
 470 // BEAM WEAPON FORWARD DECLARATIONS
 471 //
 472
 473 // delete a beam
 474 void beam_delete(beam *b);
 475
 476 // handle a hit on a specific object
 477 void beam_handle_collisions(beam *b);
 478
 479 // fills in binfo
 480 void beam_get_binfo(beam *b, float accuracy, int num_shots);
 481
 482 // aim the beam (setup last_start and last_shot - the endpoints). also recalculates object collision info
 483 void beam_aim(beam *b);
 484
 485 // type A functions
 486 void beam_type_a_move(beam *b);
 487
 488 // type B functions
 489 void beam_type_b_move(beam *b);
 490
 491 // type C functions
 492 void beam_type_c_move(beam *b);
 493
 494 // type D functions
 495 void beam_type_d_move(beam *b);
 496 void beam_type_d_get_status(beam *b, int *shot_index, int *fire_wait);
 497
 498 // type e functions
 499 void beam_type_e_move(beam *b);
 500
 501 // given a model #, and an object, stuff 2 good world coord points
 502 void beam_get_octant_points(int modelnum, object *objp, int oct_index, int oct_array[BEAM_NUM_GOOD_OCTANTS][4], vector *v1, vector *v2);
 503
 504 // given an object, return its model num
 505 int beam_get_model(object *objp);
 506
 507 // for a given object, and a firing beam, determine its critical dot product and range
 508 void beam_get_cull_vals(object *objp, beam *b, float *cull_dot, float *cull_dist);
 509
 510 // get the total possible cone for a given beam in radians
 511 float beam_get_cone_dot(beam *b);
 512
 513 // for rendering the beam effect
 514 // output top and bottom vectors
 515 // fvec == forward vector (eye viewpoint basically. in world coords)
 516 // pos == world coordinate of the point we're calculating "around"
 517 // w == width of the diff between top and bottom around pos
 518 void beam_calc_facing_pts(vector *top, vector *bot, vector *fvec, vector *pos, float w, float z_add);
 519
 520 // render the muzzle glow for a beam weapon
 521 void beam_render_muzzle_glow(beam *b);
 522
 523 // generate particles for the muzzle glow
 524 void beam_generate_muzzle_particles(beam *b);
 525
 526 // throw some jitter into the aim - based upon shot_aim
 527 void beam_jitter_aim(beam *b, float aim);
 528
 529 // if it is legal for the beam to continue firing
 530 // returns -1 if the beam should stop firing immediately
 531 // returns 0 if the beam should go to warmdown
 532 // returns 1 if the beam can continue along its way
 533 int beam_ok_to_fire(beam *b);
 534
 535 // start the warmup phase for the beam
 536 void beam_start_warmup(beam *b);
 537
 538 // start the firing phase for the beam, return 0 if the beam failed to start, and should be deleted altogether
 539 int beam_start_firing(beam *b);
 540
 541 // start the warmdown phase for the beam
 542 void beam_start_warmdown(beam *b);
 543
 544 // add a collision to the beam for this frame (to be evaluated later)
 545 void beam_add_collision(beam *b, object *hit_object, mc_info *cinfo);
 546
 547 // sort collisions for the frame
 548 int beam_sort_collisions_func(const void *e1, const void *e2);
 549
 550 // get the width of the widest section of the beam
 551 float beam_get_widest(beam *b);
 552
 553 // mark an object as being lit
 554 void beam_add_light(beam *b, int objnum, int source, vector *c_point);
 555
 556 // apply lighting from any beams
 557 void beam_apply_lighting();
 558
 559 // recalculate beam sounds (looping sounds relative to the player)
 560 void beam_recalc_sounds(beam *b);
 561
 562 // apply a whack to a ship
 563 void beam_apply_whack(beam *b, object *objp, vector *hit_point);
 564
 565 // return the amount of damage which should be applied to a ship. basically, filters friendly fire damage
 566 float beam_get_ship_damage(beam *b, object *objp);
 567
 568 // if the beam is likely to tool a given target before its lifetime expires
 569 int beam_will_tool_target(beam *b, object *objp);
 570
 571
 572 // ------------------------------------------------------------------------------------------------
 573 // BEAM WEAPON FUNCTIONS
 574 //
 575
 576 // init at game startup
 577 void beam_init()
 578 {
 579         // clear the beams
 580         list_init( &Beam_free_list );
 581         list_init( &Beam_used_list );
 582 }
 583
 584 // initialize beam weapons for this level
 585 void beam_level_init()
 586 {
 587         // intialize beams
 588         int idx;
 589
 590         Beam_count = 0;
 591         list_init( &Beam_free_list );
 592         list_init( &Beam_used_list );
 593         memset(Beams, 0, sizeof(beam) * MAX_BEAMS);
 594
 595         // Link all object slots into the free list
 596         for (idx=0; idx<MAX_BEAMS; idx++)       {
 597                 Beams[idx].objnum = -1;
 598                 list_append(&Beam_free_list, &Beams[idx] );
 599         }
 600
 601         // reset muzzle particle spew timestamp
 602         Beam_muzzle_stamp = -1;
 603 }
 604
 605 // shutdown beam weapons for this level
 606 void beam_level_close()
 607 {
 608         // clear the beams
 609         list_init( &Beam_free_list );
 610         list_init( &Beam_used_list );
 611 }
 612
 613 // fire a beam, returns nonzero on success. the innards of the code handle all the rest, foo
 614 int beam_fire(beam_fire_info *fire_info)
 615 {
 616         beam *new_item;
 617         weapon_info *wip;
 618         ship *firing_ship;
 619         int objnum;
 620
 621         // sanity check
 622         if(fire_info == NULL){
 623                 Int3();
 624                 return -1;
 625         }
 626
 627         // if we're out of beams, bail
 628         if(Beam_count >= MAX_BEAMS){
 629                 return -1;
 630         }
 631
 632         // for now, only allow ship targets
 633         if((fire_info->target->type != OBJ_SHIP) && (fire_info->target->type != OBJ_ASTEROID) && (fire_info->target->type != OBJ_DEBRIS) && (fire_info->target->type != OBJ_WEAPON)){
 634                 return -1;
 635         }
 636
 637         // make sure the beam_info_index is valid
 638         SDL_assert((fire_info->beam_info_index >= 0) && (fire_info->beam_info_index < MAX_WEAPON_TYPES) && (Weapon_info[fire_info->beam_info_index].wi_flags & WIF_BEAM));
 639         if((fire_info->beam_info_index < 0) || (fire_info->beam_info_index >= MAX_WEAPON_TYPES) || !(Weapon_info[fire_info->beam_info_index].wi_flags & WIF_BEAM)){
 640                 return -1;
 641         }
 642         wip = &Weapon_info[fire_info->beam_info_index];
 643
 644         // make sure a ship is firing this
 645         SDL_assert((fire_info->shooter->type == OBJ_SHIP) && (fire_info->shooter->instance >= 0) && (fire_info->shooter->instance < MAX_SHIPS));
 646         if((fire_info->shooter->type != OBJ_SHIP) || (fire_info->shooter->instance < 0) || (fire_info->shooter->instance >= MAX_SHIPS)){
 647                 return -1;
 648         }
 649         firing_ship = &Ships[fire_info->shooter->instance];
 650
 651         // get a free beam
 652         new_item = GET_FIRST(&Beam_free_list);
 653         SDL_assert( new_item != &Beam_free_list );              // shouldn't have the dummy element
 654         if(new_item == &Beam_free_list){
 655                 return -1;
 656         }
 657
 658         // remove from the free list
 659         list_remove( &Beam_free_list, new_item );
 660
 661         // insert onto the end of used list
 662         list_append( &Beam_used_list, new_item );
 663
 664         // increment counter
 665         Beam_count++;
 666
 667         // fill in some values
 668         new_item->warmup_stamp = -1;
 669         new_item->warmdown_stamp = -1;
 670         new_item->weapon_info_index = fire_info->beam_info_index;
 671         new_item->objp = fire_info->shooter;
 672         new_item->sig = fire_info->shooter->signature;
 673         new_item->subsys = fire_info->turret;
 674         new_item->life_left = wip->b_info.beam_life;
 675         new_item->life_total = wip->b_info.beam_life;
 676         new_item->r_collision_count = 0;
 677         new_item->f_collision_count = 0;
 678         new_item->target = fire_info->target;
 679         new_item->target_subsys = fire_info->target_subsys;
 680         new_item->target_sig = fire_info->target->signature;
 681         new_item->beam_sound_loop = -1;
 682         new_item->type = wip->b_info.beam_type;
 683         new_item->targeting_laser_offset = fire_info->targeting_laser_offset;
 684         new_item->framecount = 0;
 685         new_item->flags = 0;
 686         new_item->shot_index = 0;
 687         new_item->shrink = 1.0f;
 688         new_item->team = (char)firing_ship->team;
 689
 690         // if the targeted subsystem is not NULL, force it to be a type A beam
 691         if(new_item->target_subsys != NULL){
 692                 new_item->type = BEAM_TYPE_A;
 693         }
 694
 695         // type D weapons can only fire at small ships and missiles
 696         if(new_item->type == BEAM_TYPE_D){
 697                 // if its a targeted ship, get the target ship
 698                 if((fire_info->target != NULL) && (fire_info->target->type == OBJ_SHIP) && (fire_info->target->instance >= 0)){
 699                         ship *target_ship = &Ships[fire_info->target->instance];
 700
 701                         // maybe force to be a type A
 702                         if(Ship_info[target_ship->ship_info_index].flags & (SIF_BIG_SHIP | SIF_CAPITAL | SIF_SUPERCAP | SIF_FREIGHTER | SIF_DRYDOCK | SIF_CARGO)){
 703                                 new_item->type = BEAM_TYPE_A;
 704                         }
 705                 }
 706         }
 707
 708         // ----------------------------------------------------------------------
 709         // THIS IS THE CRITICAL POINT FOR MULTIPLAYER
 710         // beam_get_binfo(...) determines exactly how the beam will behave over the course of its life
 711         // it fills in binfo, which we can pass to clients in multiplayer
 712         if(fire_info->beam_info_override != NULL){
 713                 new_item->binfo = *fire_info->beam_info_override;
 714         } else {
 715                 beam_get_binfo(new_item, fire_info->accuracy, wip->b_info.beam_shots);                  // to fill in b_info    - the set of directional aim vectors
 716         }
 717
 718         // create the associated object
 719         objnum = obj_create(OBJ_BEAM, -1, new_item - Beams, &vmd_identity_matrix, &vmd_zero_vector, 1.0f, OF_COLLIDES);
 720         if(objnum < 0){
 721                 Int3();
 722                 beam_delete(new_item);
 723                 nprintf(("General", "obj_create() failed for beam weapon! bah!\n"));
 724                 return -1;
 725         }
 726         new_item->objnum = objnum;
 727
 728         // this sets up all info for the first frame the beam fires
 729         beam_aim(new_item);                                             // to fill in shot_point, etc.
 730
 731         // check to see if its legal to fire at this guy
 732         if(beam_ok_to_fire(new_item) != 1){
 733                 beam_delete(new_item);
 734                 mprintf(("Killing beam at initial fire because of illegal targeting!!!\n"));
 735                 return -1;
 736         }
 737
 738         // if we're a multiplayer master - send a packet
 739         if(MULTIPLAYER_MASTER){
 740                 send_beam_fired_packet(fire_info->shooter, fire_info->turret, fire_info->target, fire_info->beam_info_index, &new_item->binfo);
 741         }
 742
 743         // start the warmup phase
 744         beam_start_warmup(new_item);
 745
 746         return objnum;
 747 }
 748
 749 // fire a targeting beam, returns objnum on success. a much much simplified version of a beam weapon
 750 // targeting lasers last _one_ frame. For a continuous stream - they must be created every frame.
 751 // this allows it to work smoothly in multiplayer (detect "trigger down". every frame just create a targeting laser firing straight out of the
 752 // object. this way you get all the advantages of nice rendering and collisions).
 753 // NOTE : only references beam_info_index and shooter
 754 int beam_fire_targeting(beam_fire_info *fire_info)
 755 {
 756         beam *new_item;
 757         weapon_info *wip;
 758         int objnum;
 759         ship *firing_ship;
 760
 761         // sanity check
 762         if(fire_info == NULL){
 763                 Int3();
 764                 return -1;
 765         }
 766
 767         // if we're out of beams, bail
 768         if(Beam_count >= MAX_BEAMS){
 769                 return -1;
 770         }
 771
 772         // make sure the beam_info_index is valid
 773         SDL_assert((fire_info->beam_info_index >= 0) && (fire_info->beam_info_index < MAX_WEAPON_TYPES) && (Weapon_info[fire_info->beam_info_index].wi_flags & WIF_BEAM));
 774         if((fire_info->beam_info_index < 0) || (fire_info->beam_info_index >= MAX_WEAPON_TYPES) || !(Weapon_info[fire_info->beam_info_index].wi_flags & WIF_BEAM)){
 775                 return -1;
 776         }
 777         wip = &Weapon_info[fire_info->beam_info_index];
 778
 779         // make sure a ship is firing this
 780         SDL_assert((fire_info->shooter->type == OBJ_SHIP) && (fire_info->shooter->instance >= 0) && (fire_info->shooter->instance < MAX_SHIPS));
 781         if((fire_info->shooter->type != OBJ_SHIP) || (fire_info->shooter->instance < 0) || (fire_info->shooter->instance >= MAX_SHIPS)){
 782                 return -1;
 783         }
 784         firing_ship = &Ships[fire_info->shooter->instance];
 785
 786
 787         // get a free beam
 788         new_item = GET_FIRST(&Beam_free_list);
 789         SDL_assert( new_item != &Beam_free_list );              // shouldn't have the dummy element
 790
 791         // remove from the free list
 792         list_remove( &Beam_free_list, new_item );
 793
 794         // insert onto the end of used list
 795         list_append( &Beam_used_list, new_item );
 796
 797         // increment counter
 798         Beam_count++;
 799
 800         // maybe allocate some extra data based on the beam type
 801         SDL_assert(wip->b_info.beam_type == BEAM_TYPE_C);
 802         if(wip->b_info.beam_type != BEAM_TYPE_C){
 803                 return -1;
 804         }
 805
 806         // fill in some values
 807         new_item->warmup_stamp = -1;
 808         new_item->warmdown_stamp = -1;
 809         new_item->weapon_info_index = fire_info->beam_info_index;
 810         new_item->objp = fire_info->shooter;
 811         new_item->sig = 0;
 812         new_item->subsys = NULL;
 813         new_item->life_left = 0;
 814         new_item->life_total = 0;
 815         new_item->r_collision_count = 0;
 816         new_item->f_collision_count = 0;
 817         new_item->target = NULL;
 818         new_item->target_subsys = NULL;
 819         new_item->target_sig = 0;
 820         new_item->beam_sound_loop = -1;
 821         new_item->type = BEAM_TYPE_C;
 822         new_item->targeting_laser_offset = fire_info->targeting_laser_offset;
 823         new_item->framecount = 0;
 824         new_item->flags = 0;
 825         new_item->shot_index = 0;
 826         new_item->team = (char)firing_ship->team;
 827
 828         // type c is a very special weapon type - binfo has no meaning
 829
 830         // create the associated object
 831         objnum = obj_create(OBJ_BEAM, -1, new_item - Beams, &vmd_identity_matrix, &vmd_zero_vector, 1.0f, OF_COLLIDES);
 832         if(objnum < 0){
 833                 Int3();
 834                 beam_delete(new_item);
 835                 nprintf(("General", "obj_create() failed for beam weapon! bah!\n"));
 836                 return -1;
 837         }
 838         new_item->objnum = objnum;
 839
 840         // this sets up all info for the first frame the beam fires
 841         beam_aim(new_item);                                             // to fill in shot_point, etc.
 842
 843         return objnum;
 844 }
 845
 846 // return an object index of the guy who's firing this beam
 847 int beam_get_parent(object *bm)
 848 {
 849         beam *b;
 850
 851         // get a handle to the beam
 852         SDL_assert(bm->type == OBJ_BEAM);
 853         SDL_assert(bm->instance >= 0);
 854         if(bm->type != OBJ_BEAM){
 855                 return -1;
 856         }
 857         if(bm->instance < 0){
 858                 return -1;
 859         }
 860         b = &Beams[bm->instance];
 861
 862         SDL_assert(b->objp != NULL);
 863         if(b->objp == NULL){
 864                 return -1;
 865         }
 866
 867         // if the object handle is invalid
 868         if(b->objp->signature != b->sig){
 869                 return -1;
 870         }
 871
 872         // return the handle
 873         return OBJ_INDEX(b->objp);
 874 }
 875
 876 // return weapon_info_index of beam
 877 int beam_get_weapon_info_index(object *bm)
 878 {
 879         SDL_assert(bm->type == OBJ_BEAM);
 880         if (bm->type != OBJ_BEAM) {
 881                 return -1;
 882         }
 883
 884         SDL_assert(bm->instance >= 0 && bm->instance < MAX_BEAMS);
 885         if (bm->instance < 0) {
 886                 return -1;
 887         }
 888
 889         // return weapon_info_index
 890         return Beams[bm->instance].weapon_info_index;
 891 }
 892
 893
 894
 895 // given a beam object, get the # of collisions which happened during the last collision check (typically, last frame)
 896 int beam_get_num_collisions(int objnum)
 897 {
 898         // sanity checks
 899         if((objnum < 0) || (objnum >= MAX_OBJECTS)){
 900                 Int3();
 901                 return -1;
 902         }
 903         if((Objects[objnum].instance < 0) || (Objects[objnum].instance >= MAX_BEAMS)){
 904                 Int3();
 905                 return -1;
 906         }
 907         if((Beams[Objects[objnum].instance].objnum != objnum) || (Beams[Objects[objnum].instance].objnum < 0)){
 908                 Int3();
 909                 return -1;
 910         }
 911
 912         // return the # of recent collisions
 913         return Beams[Objects[objnum].instance].r_collision_count;
 914 }
 915
 916 // stuff collision info, returns 1 on success
 917 int beam_get_collision(int objnum, int num, int *collision_objnum, mc_info **cinfo)
 918 {
 919         // sanity checks
 920         if((objnum < 0) || (objnum >= MAX_OBJECTS)){
 921                 Int3();
 922                 return 0;
 923         }
 924         if((Objects[objnum].instance < 0) || (Objects[objnum].instance >= MAX_BEAMS)){
 925                 Int3();
 926                 return 0;
 927         }
 928         if((Beams[Objects[objnum].instance].objnum != objnum) || (Beams[Objects[objnum].instance].objnum < 0)){
 929                 Int3();
 930                 return 0;
 931         }
 932         if(num >= Beams[Objects[objnum].instance].r_collision_count){
 933                 Int3();
 934                 return 0;
 935         }
 936
 937         // return - success
 938         *cinfo = &Beams[Objects[objnum].instance].r_collisions[num].cinfo;
 939         *collision_objnum = Beams[Objects[objnum].instance].r_collisions[num].c_objnum;
 940         return 1;
 941 }
 942
 943 // pause all looping beam sounds
 944 void beam_pause_sounds()
 945 {
 946         beam *moveup = NULL;
 947
 948         // set all beam volumes to 0
 949         moveup = GET_FIRST(&Beam_used_list);
 950         if(moveup == NULL){
 951                 return;
 952         }
 953         while(moveup != END_OF_LIST(&Beam_used_list)){
 954                 // set the volume to 0, if he has a looping beam sound
 955                 if(moveup->beam_sound_loop >= 0){
 956                         snd_set_volume(moveup->beam_sound_loop, 0.0f);
 957                 }
 958
 959                 // next beam
 960                 moveup = GET_NEXT(moveup);
 961         }
 962 }
 963
 964 // unpause looping beam sounds
 965 void beam_unpause_sounds()
 966 {
 967         beam *moveup = NULL;
 968
 969         // recalc all beam sounds
 970         moveup = GET_FIRST(&Beam_used_list);
 971         if(moveup == NULL){
 972                 return;
 973         }
 974         while(moveup != END_OF_LIST(&Beam_used_list)){
 975                 beam_recalc_sounds(moveup);
 976
 977                 // next beam
 978                 moveup = GET_NEXT(moveup);
 979         }
 980 }
 981
 982
 983 // -----------------------------===========================------------------------------
 984 // BEAM MOVEMENT FUNCTIONS
 985 // -----------------------------===========================------------------------------
 986
 987 // move a type A beam weapon
 988 void beam_type_a_move(beam *b)
 989 {
 990         vector dir;
 991         vector temp, temp2;
 992
 993         // LEAVE THIS HERE OTHERWISE MUZZLE GLOWS DRAW INCORRECTLY WHEN WARMING UP OR DOWN
 994         // get the "originating point" of the beam for this frame. essentially bashes last_start
 995         ship_get_global_turret_gun_info(b->objp, b->subsys, &b->last_start, &temp, 1, &temp2);
 996
 997         // if the "warming up" timestamp has not expired
 998         if((b->warmup_stamp != -1) || (b->warmdown_stamp != -1)){
 999                 return;
1000         }
1001
1002         // put the "last_shot" point arbitrarily far away
1003         vm_vec_sub(&dir, &b->last_shot, &b->last_start);
1004         vm_vec_normalize_quick(&dir);
1005         vm_vec_scale_add(&b->last_shot, &b->last_start, &dir, BEAM_FAR_LENGTH);
1006         SDL_assert(is_valid_vec(&b->last_shot));
1007 }
1008
1009 // move a type B beam weapon
1010 #define BEAM_T(b)                                               ( ((b->binfo.delta_ang / b->life_total) * (b->life_total - b->life_left)) / b->binfo.delta_ang )
1011 void beam_type_b_move(beam *b)
1012 {
1013         vector actual_dir;
1014         vector temp, temp2;
1015         float dot_save;
1016
1017         // LEAVE THIS HERE OTHERWISE MUZZLE GLOWS DRAW INCORRECTLY WHEN WARMING UP OR DOWN
1018         // get the "originating point" of the beam for this frame. essentially bashes last_start
1019         ship_get_global_turret_gun_info(b->objp, b->subsys, &b->last_start, &temp, 1, &temp2);
1020
1021         // if the "warming up" timestamp has not expired
1022         if((b->warmup_stamp != -1) || (b->warmdown_stamp != -1)){
1023                 return;
1024         }
1025
1026         // if the two direction vectors are _really_ close together, just use the original direction
1027         dot_save = vm_vec_dot(&b->binfo.dir_a, &b->binfo.dir_b);
1028         if((double)dot_save >= 0.999999999){
1029                 actual_dir = b->binfo.dir_a;
1030         }
1031         // otherwise move towards the dir       we calculated when firing this beam
1032         else {
1033                 vm_vec_interp_constant(&actual_dir, &b->binfo.dir_a, &b->binfo.dir_b, BEAM_T(b));
1034         }
1035
1036         // now recalculate shot_point to be shooting through our new point
1037         vm_vec_scale_add(&b->last_shot, &b->last_start, &actual_dir, BEAM_FAR_LENGTH);
1038         int is_valid = is_valid_vec(&b->last_shot);
1039         SDL_assert(is_valid);
1040         if(!is_valid){
1041                 actual_dir = b->binfo.dir_a;
1042                 vm_vec_scale_add(&b->last_shot, &b->last_start, &actual_dir, BEAM_FAR_LENGTH);
1043         }
1044 }
1045
1046 // type C functions
1047 void beam_type_c_move(beam *b)
1048 {
1049         vector temp;
1050
1051         // ugh
1052         if(b->objp == NULL){
1053                 Int3();
1054                 return;
1055         }
1056
1057         // type c beams only last one frame so we never have to "move" them.
1058         temp = b->targeting_laser_offset;
1059         vm_vec_unrotate(&b->last_start, &temp, &b->objp->orient);
1060         vm_vec_add2(&b->last_start, &b->objp->pos);
1061         vm_vec_scale_add(&b->last_shot, &b->last_start, &b->objp->orient.v.fvec, BEAM_FAR_LENGTH);
1062 }
1063
1064 // type D functions
1065 void beam_type_d_move(beam *b)
1066 {
1067         int shot_index, fire_wait;
1068         vector temp, temp2, dir;
1069
1070         // LEAVE THIS HERE OTHERWISE MUZZLE GLOWS DRAW INCORRECTLY WHEN WARMING UP OR DOWN
1071         // get the "originating point" of the beam for this frame. essentially bashes last_start
1072         ship_get_global_turret_gun_info(b->objp, b->subsys, &b->last_start, &temp, 1, &temp2);
1073
1074         // if the "warming up" timestamp has not expired
1075         if((b->warmup_stamp != -1) || (b->warmdown_stamp != -1)){
1076                 return;
1077         }
1078
1079         // determine what stage of the beam we're in
1080         beam_type_d_get_status(b, &shot_index, &fire_wait);
1081
1082         // if we've changed shot index
1083         if(shot_index != b->shot_index){
1084                 // set the new index
1085                 b->shot_index = shot_index;
1086
1087                 // re-aim
1088                 beam_aim(b);
1089         }
1090
1091         // if we're in the fire wait stage
1092         b->flags &= ~BF_SAFETY;
1093         if(fire_wait){
1094                 b->flags |= BF_SAFETY;
1095         }
1096
1097         // put the "last_shot" point arbitrarily far away
1098         vm_vec_sub(&dir, &b->last_shot, &b->last_start);
1099         vm_vec_normalize_quick(&dir);
1100         vm_vec_scale_add(&b->last_shot, &b->last_start, &dir, BEAM_FAR_LENGTH);
1101         SDL_assert(is_valid_vec(&b->last_shot));
1102 }
1103 void beam_type_d_get_status(beam *b, int *shot_index, int *fire_wait)
1104 {
1105         float shot_time = b->life_total / (float)b->binfo.shot_count;
1106         float beam_time = b->life_total - b->life_left;
1107
1108         // determine what "shot" we're on
1109         *shot_index = (int)(beam_time / shot_time);
1110         SDL_assert(*shot_index < b->binfo.shot_count);
1111         if(*shot_index >= b->binfo.shot_count){
1112                 *shot_index = b->binfo.shot_count - 1;
1113         }
1114
1115         // determine if its the firing or waiting section of the shot (fire happens first, THEN wait)
1116         *fire_wait = 0;
1117         if(beam_time > ((shot_time * (*shot_index)) + (shot_time * 0.5f))){
1118                 *fire_wait = 1;
1119         }
1120 }
1121
1122 // type e functions
1123 void beam_type_e_move(beam *b)
1124 {
1125         vector temp, turret_norm;
1126
1127         // LEAVE THIS HERE OTHERWISE MUZZLE GLOWS DRAW INCORRECTLY WHEN WARMING UP OR DOWN
1128         // get the "originating point" of the beam for this frame. essentially bashes last_start
1129         ship_get_global_turret_gun_info(b->objp, b->subsys, &b->last_start, &turret_norm, 1, &temp);
1130
1131         // if the "warming up" timestamp has not expired
1132         if((b->warmup_stamp != -1) || (b->warmdown_stamp != -1)){
1133                 return;
1134         }
1135
1136         // put the "last_shot" point arbitrarily far away
1137         vm_vec_scale_add(&b->last_shot, &b->last_start, &turret_norm, BEAM_FAR_LENGTH);
1138         SDL_assert(is_valid_vec(&b->last_shot));
1139 }
1140
1141 // pre-move (before collision checking - but AFTER ALL OTHER OBJECTS HAVE BEEN MOVED)
1142 void beam_move_all_pre()
1143 {
1144         beam *b;
1145         beam *moveup;
1146
1147         // zero lights for this frame yet
1148         Beam_light_count = 0;
1149
1150         // traverse through all active beams
1151         moveup = GET_FIRST(&Beam_used_list);
1152         while(moveup != END_OF_LIST(&Beam_used_list)){
1153                 // get the beam
1154                 b = moveup;
1155
1156                 // unset collision info
1157                 b->f_collision_count = 0;
1158
1159                 if(!physics_paused){
1160                         // move the beam
1161                         switch(b->type){
1162                         // type A beam weapons don't move
1163                         case BEAM_TYPE_A :
1164                                 beam_type_a_move(b);
1165                                 break;
1166
1167                         // type B beam weapons move across the target somewhat randomly
1168                         case BEAM_TYPE_B :
1169                                 beam_type_b_move(b);
1170                                 break;
1171
1172                         // type C beam weapons are attached to a fighter - pointing forward
1173                         case BEAM_TYPE_C:
1174                                 beam_type_c_move(b);
1175                                 break;
1176
1177                         // type D
1178                         case BEAM_TYPE_D:
1179                                 beam_type_d_move(b);
1180                                 break;
1181
1182                         // type E
1183                         case BEAM_TYPE_E:
1184                                 beam_type_e_move(b);
1185                                 break;
1186
1187                         // illegal beam type
1188                         default :
1189                                 Int3();
1190                         }
1191                 }
1192
1193                 // next
1194                 moveup = GET_NEXT(moveup);
1195         }
1196 }
1197
1198 // post-collision time processing for beams
1199 void beam_move_all_post()
1200 {
1201         beam *moveup;
1202         beam *next_one;
1203         int bf_status;
1204         beam_weapon_info *bwi;
1205
1206         // traverse through all active beams
1207         moveup = GET_FIRST(&Beam_used_list);
1208         while(moveup != END_OF_LIST(&Beam_used_list)){
1209                  bwi = &Weapon_info[moveup->weapon_info_index].b_info;
1210
1211                  // check the status of the beam
1212                 bf_status = beam_ok_to_fire(moveup);
1213
1214                 // if we're warming up
1215                 if(moveup->warmup_stamp != -1){
1216                         next_one = GET_NEXT(moveup);
1217
1218                         // should we be stopping?
1219                         if(bf_status < 0){
1220                                 beam_delete(moveup);
1221                         } else {
1222                                 // if the warming up timestamp has expired, start firing
1223                                 if(timestamp_elapsed(moveup->warmup_stamp)){
1224                                         // start firing
1225                                         if(!beam_start_firing(moveup)){
1226                                                 beam_delete(moveup);
1227                                         }
1228
1229                                         // add a muzzle light for the shooter
1230                                         beam_add_light(moveup, OBJ_INDEX(moveup->objp), 0, NULL);
1231                                 }
1232                         }
1233
1234                         // next
1235                         moveup = next_one;
1236                         continue;
1237                 }
1238                 // if we're warming down
1239                 else if(moveup->warmdown_stamp != -1){
1240                         next_one = GET_NEXT(moveup);
1241
1242                         // should we be stopping?
1243                         if(bf_status < 0){
1244                                 beam_delete(moveup);
1245                         } else {
1246                                 // if we're done warming down, the beam is finished
1247                                 if(timestamp_elapsed(moveup->warmdown_stamp)){
1248                                         beam_delete(moveup);
1249                                 }
1250                         }
1251
1252                         // next
1253                         moveup = next_one;
1254                         continue;
1255                 }
1256
1257                 // otherwise, we're firing away.........
1258
1259                 // add a muzzle light for the shooter
1260                 beam_add_light(moveup, OBJ_INDEX(moveup->objp), 0, NULL);
1261
1262                 // subtract out the life left for the beam
1263                 if(!physics_paused){
1264                         moveup->life_left -= flFrametime;
1265                 }
1266
1267                 // if we're past the shrink point, start shrinking the beam
1268                 if(moveup->life_left <= (moveup->life_total * bwi->beam_shrink_factor)){
1269                         moveup->flags |= BF_SHRINK;
1270                 }
1271
1272                 // if we're shrinking the beam
1273                 if(moveup->flags & BF_SHRINK){
1274                         moveup->shrink -= bwi->beam_shrink_pct * flFrametime;
1275                         if(moveup->shrink < 0.1f){
1276                                 moveup->shrink = 0.1f;
1277                         }
1278                 }
1279
1280                 // stop shooting?
1281                 if(bf_status <= 0){
1282                         next_one = GET_NEXT(moveup);
1283
1284                         // if beam should abruptly stop
1285                         if(bf_status == -1){
1286                                 beam_delete(moveup);
1287                         }
1288                         // if the beam should just power down
1289                         else {
1290                                 beam_start_warmdown(moveup);
1291                         }
1292
1293                         // next beam
1294                         moveup = next_one;
1295                         continue;
1296                 }
1297
1298                 // increment framecount
1299                 moveup->framecount++;
1300
1301                 // type c weapons live for one frame only
1302                 if(moveup->type == BEAM_TYPE_C){
1303                         if(moveup->framecount > 1){
1304                                 next_one = GET_NEXT(moveup);
1305
1306                                 beam_delete(moveup);
1307                                 moveup = next_one;
1308                                 continue;
1309                         }
1310                 }
1311                 // done firing, so go into the warmdown phase
1312                 else {
1313                         if((moveup->life_left <= 0.0f) && (moveup->warmdown_stamp == -1)){
1314                                 beam_start_warmdown(moveup);
1315
1316                                 moveup = GET_NEXT(moveup);
1317                                 continue;
1318                         }
1319                 }
1320
1321                 // handle any collisions which occured collision (will take care of applying damage to all objects which got hit)
1322                 beam_handle_collisions(moveup);
1323
1324                 // recalculate beam sounds
1325                 beam_recalc_sounds(moveup);
1326
1327                 // next item
1328                 moveup = GET_NEXT(moveup);
1329         }
1330
1331         // apply all beam lighting
1332         beam_apply_lighting();
1333
1334         // process beam culling info
1335 #ifndef NDEBUG
1336         /*
1337         if(Beam_test_stamp == -1){
1338                 Beam_test_stamp = timestamp(BEAM_TEST_STAMP_TIME);
1339                 Beam_test_ints = 0;
1340                 Beam_test_framecount = 0;
1341         } else {
1342                 if(timestamp_elapsed(Beam_test_stamp)){
1343                         // report the results
1344                         nprintf(("General", "Performed %f beam ints/frame (%d, %d, %d, %d), over %f seconds\n", (float)Beam_test_ints/(float)Beam_test_framecount, Beam_test_ints, Beam_test_framecount, Beam_test_ship, Beam_test_ast, (float)BEAM_TEST_STAMP_TIME / 1000.0f));
1345
1346                         // reset vars
1347                         Beam_test_stamp = timestamp(BEAM_TEST_STAMP_TIME);
1348                         Beam_test_ints = 0;
1349                         Beam_test_ship = 0;
1350                         Beam_test_ast = 0;
1351                         Beam_test_framecount = 0;
1352                 } else {
1353                         Beam_test_framecount++;
1354                 }
1355         }
1356         */
1357 #endif
1358 }
1359
1360 // -----------------------------===========================------------------------------
1361 // BEAM RENDERING FUNCTIONS
1362 // -----------------------------===========================------------------------------
1363
1364 // render a beam weapon
1365 #define STUFF_VERTICES()        do { verts[0]->u = 0.0f; verts[0]->v = 0.0f;    verts[1]->u = 1.0f; verts[1]->v = 0.0f; verts[2]->u = 1.0f;     verts[2]->v = 1.0f; verts[3]->u = 0.0f; verts[3]->v = 1.0f; } while(0);
1366 #define R_VERTICES()            do { g3_rotate_vertex(verts[0], &bottom1); g3_rotate_vertex(verts[1], &bottom2);        g3_rotate_vertex(verts[2], &top2); g3_rotate_vertex(verts[3], &top1); } while(0);
1367 #define P_VERTICES()            do { for(idx=0; idx<4; idx++){ g3_project_vertex(verts[idx]); } } while(0);
1368 int poly_beam = 0;
1369 void beam_render(beam_weapon_info *bwi, vector *start, vector *shot, float shrink)
1370 {
1371         int idx, s_idx;
1372         vertex h1[4];                           // halves of a beam section
1373         vertex *verts[4] = { &h1[0], &h1[1], &h1[2], &h1[3] };
1374         vector fvec, top1, bottom1, top2, bottom2;
1375         float scale;
1376
1377         // bogus weapon info index
1378         if(bwi == NULL){
1379                 return;
1380         }
1381
1382         // if the beam start and endpoints are the same
1383         if(vm_vec_same(start, shot)){
1384                 return;
1385         }
1386
1387         // get beam direction
1388         vm_vec_sub(&fvec, shot, start);
1389         vm_vec_normalize_quick(&fvec);
1390
1391         // turn off backface culling
1392         gr_set_cull(0);
1393
1394         // draw all sections
1395         for(s_idx=0; s_idx<bwi->beam_num_sections; s_idx++){
1396                 // calculate the beam points
1397                 scale = frand_range(1.0f - bwi->sections[s_idx].flicker, 1.0f + bwi->sections[s_idx].flicker);
1398                 beam_calc_facing_pts(&top1, &bottom1, &fvec, start, bwi->sections[s_idx].width * scale * shrink, bwi->sections[s_idx].z_add);
1399                 beam_calc_facing_pts(&top2, &bottom2, &fvec, shot, bwi->sections[s_idx].width * scale * scale * shrink, bwi->sections[s_idx].z_add);
1400                 R_VERTICES();                                                                                                                           // rotate and project the vertices
1401                 P_VERTICES();
1402                 STUFF_VERTICES();               // stuff the beam with creamy goodness (texture coords)
1403
1404                 // set the right texture with additive alpha, and draw the poly
1405                 gr_set_bitmap(bwi->sections[s_idx].texture, GR_ALPHABLEND_FILTER, GR_BITBLT_MODE_NORMAL, 0.9999f, -1, -1);
1406                 g3_draw_poly( 4, verts, TMAP_FLAG_TEXTURED | TMAP_FLAG_CORRECT);
1407         }
1408
1409         // turn backface culling back on
1410         gr_set_cull(1);
1411 }
1412
1413 // generate particles for the muzzle glow
1414 int hack_time = 100;
1415 DCF(h_time, "")
1416 {
1417         dc_get_arg(ARG_INT);
1418         hack_time = Dc_arg_int;
1419 }
1420 void beam_generate_muzzle_particles(beam *b)
1421 {
1422         int particle_count;
1423         int idx;
1424         weapon_info *wip;
1425         vector turret_norm, turret_pos, particle_pos, particle_dir, p_temp;
1426         matrix m;
1427         particle_info pinfo;
1428
1429         // if our hack stamp has expired
1430         if(!((Beam_muzzle_stamp == -1) || timestamp_elapsed(Beam_muzzle_stamp))){
1431                 return;
1432         }
1433
1434         // never generate anything past about 1/5 of the beam fire time
1435         if(b->warmup_stamp == -1){
1436                 return;
1437         }
1438
1439         // get weapon info
1440         wip = &Weapon_info[b->weapon_info_index];
1441
1442         // no specified particle for this beam weapon
1443         if(wip->b_info.beam_particle_ani < 0){
1444                 return;
1445         }
1446
1447         // reset the hack stamp
1448         Beam_muzzle_stamp = timestamp(hack_time);
1449
1450         // randomly generate 10 to 20 particles
1451         particle_count = (int)frand_range(0.0f, (float)wip->b_info.beam_particle_count);
1452
1453         // get turret info - position and normal
1454         turret_pos = b->subsys->system_info->pnt;
1455         turret_norm = b->subsys->system_info->turret_norm;
1456
1457         // randomly perturb a vector within a cone around the normal
1458         vm_vector_2_matrix(&m, &turret_norm, NULL, NULL);
1459         for(idx=0; idx<particle_count; idx++){
1460                 // get a random point in the cone
1461                 vm_vec_random_cone(&particle_dir, &turret_norm, wip->b_info.beam_particle_angle, &m);
1462                 p_temp = turret_pos;
1463                 vm_vec_scale_add(&p_temp, &turret_pos, &particle_dir, wip->b_info.beam_muzzle_radius * frand_range(0.75f, 0.9f));
1464
1465                 // transform into world coords
1466                 vm_vec_unrotate(&particle_pos, &p_temp, &b->objp->orient);
1467                 vm_vec_add2(&particle_pos, &b->objp->pos);
1468                 p_temp = particle_dir;
1469                 vm_vec_unrotate(&particle_dir, &p_temp, &b->objp->orient);
1470
1471                 // now generate some interesting values for the particle
1472                 float p_time_ref = wip->b_info.beam_life + ((float)wip->b_info.beam_warmup / 1000.0f);
1473                 float p_life = frand_range(p_time_ref * 0.5f, p_time_ref * 0.7f);
1474                 float p_vel = (wip->b_info.beam_muzzle_radius / p_life) * frand_range(0.85f, 1.2f);
1475                 vm_vec_scale(&particle_dir, -p_vel);
1476
1477                 memset(&pinfo, 0, sizeof(particle_info));
1478                 pinfo.pos = particle_pos;
1479                 pinfo.vel = particle_dir;
1480                 pinfo.lifetime = p_life;
1481                 pinfo.attached_objnum = -1;
1482                 pinfo.attached_sig = 0;
1483                 pinfo.rad = wip->b_info.beam_particle_radius;
1484                 pinfo.reverse = 1;
1485                 pinfo.type = PARTICLE_BITMAP;
1486                 pinfo.optional_data = wip->b_info.beam_particle_ani;
1487                 pinfo.tracer_length = -1.0f;
1488                 particle_create(&pinfo);
1489         }
1490 }
1491
1492 // render the muzzle glow for a beam weapon
1493 void beam_render_muzzle_glow(beam *b)
1494 {
1495         vertex v;
1496         weapon_info *wip = &Weapon_info[b->weapon_info_index];
1497         beam_weapon_info *bwi = &Weapon_info[b->weapon_info_index].b_info;
1498         float pct, rand_val;
1499
1500         // if we don't have a glow bitmap
1501         if(bwi->beam_glow_bitmap < 0){
1502                 return;
1503         }
1504
1505         // if the beam is warming up, scale the glow
1506         if(b->warmup_stamp != -1){
1507                 // get warmup pct
1508                 pct = BEAM_WARMUP_PCT(b);
1509                 rand_val = 1.0f;
1510         } else
1511         // if the beam is warming down
1512         if(b->warmdown_stamp != -1){
1513                 // get warmup pct
1514                 pct = 1.0f - BEAM_WARMDOWN_PCT(b);
1515                 rand_val = 1.0f;
1516         }
1517         // otherwise the beam is really firing
1518         else {
1519                 pct = 1.0f;
1520                 rand_val = frand_range(0.90f, 1.0f);
1521         }
1522
1523         // draw the bitmap
1524         g3_rotate_vertex(&v, &b->last_start);
1525         gr_set_bitmap( bwi->beam_glow_bitmap, GR_ALPHABLEND_FILTER, GR_BITBLT_MODE_NORMAL, 0.8f * pct, -1, -1);
1526         // draw 1 bitmap
1527         g3_draw_bitmap(&v, 0, wip->b_info.beam_muzzle_radius * pct * rand_val, TMAP_FLAG_TEXTURED);
1528
1529         // maybe draw more
1530         if(pct > 0.3f){
1531                 g3_draw_bitmap(&v, 0, wip->b_info.beam_muzzle_radius * pct * 0.75f * rand_val, TMAP_FLAG_TEXTURED);
1532         }
1533         if(pct > 0.5f){
1534                 g3_draw_bitmap(&v, 0, wip->b_info.beam_muzzle_radius * pct * 0.45f * rand_val, TMAP_FLAG_TEXTURED);
1535         }
1536         if(pct > 0.7f){
1537                 g3_draw_bitmap(&v, 0, wip->b_info.beam_muzzle_radius * pct * 0.25f * rand_val, TMAP_FLAG_TEXTURED);
1538         }
1539 }
1540
1541 // render all beam weapons
1542 void beam_render_all()
1543 {
1544         beam *moveup;
1545
1546         // traverse through all active beams
1547         moveup = GET_FIRST(&Beam_used_list);
1548         while(moveup != END_OF_LIST(&Beam_used_list)){
1549                 // each beam type renders a little bit differently
1550                 if((moveup->warmup_stamp == -1) && (moveup->warmdown_stamp == -1) && !(moveup->flags & BF_SAFETY)){
1551                         // HACK -  if this is the first frame the beam is firing, don't render it
1552                         if(moveup->life_left >= moveup->life_total - 0.0001f){
1553
1554                                 moveup = GET_NEXT(moveup);
1555                                 continue;
1556                         }
1557
1558                         // render the beam itself
1559                         SDL_assert(moveup->weapon_info_index >= 0);
1560                         if(moveup->weapon_info_index < 0){
1561                                 moveup = GET_NEXT(moveup);
1562                                 continue;
1563                         }
1564                         beam_render(&Weapon_info[moveup->weapon_info_index].b_info, &moveup->last_start, &moveup->last_shot, moveup->shrink);
1565                 }
1566
1567                 // render the muzzle glow
1568                 beam_render_muzzle_glow(moveup);
1569
1570                 // maybe generate some muzzle particles
1571                 beam_generate_muzzle_particles(moveup);
1572
1573                 // next item
1574                 moveup = GET_NEXT(moveup);
1575         }
1576 }
1577
1578 // output top and bottom vectors
1579 // fvec == forward vector (eye viewpoint basically. in world coords)
1580 // pos == world coordinate of the point we're calculating "around"
1581 // w == width of the diff between top and bottom around pos
1582 void beam_calc_facing_pts( vector *top, vector *bot, vector *fvec, vector *pos, float w, float z_add )
1583 {
1584         vector uvec, rvec;
1585         vector temp;
1586
1587         temp = *pos;
1588
1589         vm_vec_sub( &rvec, &Eye_position, &temp );
1590         vm_vec_normalize( &rvec );
1591
1592         vm_vec_crossprod(&uvec,fvec,&rvec);
1593         vm_vec_normalize(&uvec);
1594
1595         vm_vec_scale_add( top, &temp, &uvec, w/2.0f );
1596         vm_vec_scale_add( bot, &temp, &uvec, -w/2.0f );
1597 }
1598
1599 // light scale factor
1600 float blight = 25.5f;
1601 DCF(blight, "")
1602 {
1603         dc_get_arg(ARG_FLOAT);
1604         blight = Dc_arg_float;
1605 }
1606
1607 // call to add a light source to a small object
1608 void beam_add_light_small(beam *bm, object *objp, vector *pt_override = NULL)
1609 {
1610         weapon_info *wip;
1611         beam_weapon_info *bwi;
1612         float noise;
1613
1614         // no lighting
1615         if(!Beam_lighting){
1616                 return;
1617         }
1618
1619         // sanity
1620         SDL_assert(bm != NULL);
1621         if(bm == NULL){
1622                 return;
1623         }
1624         SDL_assert(objp != NULL);
1625         if(objp == NULL){
1626                 return;
1627         }
1628         SDL_assert(bm->weapon_info_index >= 0);
1629         wip = &Weapon_info[bm->weapon_info_index];
1630         bwi = &wip->b_info;
1631
1632         // some noise
1633         noise = frand_range(1.0f - bwi->sections[0].flicker, 1.0f + bwi->sections[0].flicker);
1634
1635         // widest part of the beam
1636         float light_rad = beam_get_widest(bm) * blight * noise;
1637
1638         // nearest point on the beam, and its distance to the ship
1639         vector near_pt;
1640         if(pt_override == NULL){
1641                 float dist;
1642                 vm_vec_dist_to_line(&objp->pos, &bm->last_start, &bm->last_shot, &near_pt, &dist);
1643                 if(dist > light_rad){
1644                         return;
1645                 }
1646         } else {
1647                 near_pt = *pt_override;
1648         }
1649
1650         // average rgb of the beam
1651         float fr = (float)wip->laser_color_1.red / 255.0f;
1652         float fg = (float)wip->laser_color_1.green / 255.0f;
1653         float fb = (float)wip->laser_color_1.blue / 255.0f;
1654
1655         // add a unique light
1656         // noise *= 0.1f;                       // a little less noise here, since we want the beam to generally cast a bright light
1657         light_add_point_unique(&near_pt, light_rad * 0.0001f, light_rad, 1.0f, fr, fg, fb, OBJ_INDEX(objp));
1658 }
1659
1660 // call to add a light source to a large object
1661 void beam_add_light_large(beam *bm, object *objp, vector *pt0, vector *pt1)
1662 {
1663         weapon_info *wip;
1664         beam_weapon_info *bwi;
1665         float noise;
1666
1667         // no lighting
1668         if(!Beam_lighting){
1669                 return;
1670         }
1671
1672         // sanity
1673         SDL_assert(bm != NULL);
1674         if(bm == NULL){
1675                 return;
1676         }
1677         SDL_assert(objp != NULL);
1678         if(objp == NULL){
1679                 return;
1680         }
1681         SDL_assert(bm->weapon_info_index >= 0);
1682         wip = &Weapon_info[bm->weapon_info_index];
1683         bwi = &wip->b_info;
1684
1685         // some noise
1686         noise = frand_range(1.0f - bwi->sections[0].flicker, 1.0f + bwi->sections[0].flicker);
1687
1688         // widest part of the beam
1689         float light_rad = beam_get_widest(bm) * blight * noise;
1690
1691         // average rgb of the beam
1692         float fr = (float)wip->laser_color_1.red / 255.0f;
1693         float fg = (float)wip->laser_color_1.green / 255.0f;
1694         float fb = (float)wip->laser_color_1.blue / 255.0f;
1695
1696         // add a unique light
1697         noise *= 0.1f;                  // a little less noise here, since we want the beam to generally cast a bright light
1698         light_add_tube(pt0, pt1, 1.0f, light_rad, 1.0f * noise, fr, fg, fb, OBJ_INDEX(objp));
1699 }
1700
1701 // mark an object as being lit
1702 void beam_add_light(beam *b, int objnum, int source, vector *c_point)
1703 {
1704         beam_light_info *l;
1705
1706         // if we're out of light slots!
1707         if(Beam_light_count >= MAX_BEAM_LIGHT_INFO){
1708                 // Int3();
1709                 return;
1710         }
1711
1712         // otherwise add it
1713         l = &Beam_lights[Beam_light_count++];
1714         l->bm = b;
1715         l->objnum = objnum;
1716         l->source = (ubyte)source;
1717
1718         // only type 2 lights (from collisions) need a collision point
1719         if(c_point != NULL){
1720                 l->c_point = *c_point;
1721         } else {
1722                 SDL_assert(source != 2);
1723                 if(source == 2){
1724                         Beam_light_count--;
1725                 }
1726         }
1727 }
1728
1729 // apply lighting from any beams
1730 void beam_apply_lighting()
1731 {
1732         int idx;
1733         beam_light_info *l;
1734         vector pt, dir;
1735         beam_weapon_info *bwi;
1736
1737         // convert all beam lights into real lights
1738         for(idx=0; idx<Beam_light_count; idx++){
1739                 // get the light
1740                 l = &Beam_lights[idx];
1741
1742                 // bad object
1743                 if((l->objnum < 0) || (l->objnum >= MAX_OBJECTS) || (l->bm == NULL)){
1744                         continue;
1745                 }
1746
1747                 bwi = &Weapon_info[l->bm->weapon_info_index].b_info;
1748
1749                 // different light types
1750                 switch(l->source){
1751                 // from the muzzle of the gun
1752                 case 0:
1753                         // a few meters in from the of muzzle
1754                         vm_vec_sub(&dir, &l->bm->last_start, &l->bm->last_shot);
1755                         vm_vec_normalize_quick(&dir);
1756                         vm_vec_scale_add(&pt, &l->bm->last_start, &dir, bwi->beam_muzzle_radius * 5.0f);
1757
1758                         beam_add_light_small(l->bm, &Objects[l->objnum], &pt);
1759                         break;
1760
1761                 // from the beam passing by
1762                 case 1:
1763                         // object type
1764                         switch(Objects[l->objnum].type){
1765                         case OBJ_SHIP:
1766                                 SDL_assert(Objects[l->objnum].instance >= 0);
1767
1768                                 // large ships
1769                                 if(Ship_info[Ships[Objects[l->objnum].instance].ship_info_index].flags & (SIF_BIG_SHIP | SIF_HUGE_SHIP)){
1770                                         beam_add_light_large(l->bm, &Objects[l->objnum], &l->bm->last_start, &l->bm->last_shot);
1771                                 }
1772                                 // small ships
1773                                 else {
1774                                         beam_add_light_small(l->bm, &Objects[l->objnum]);
1775                                 }
1776                                 break;
1777
1778                         // asteroids get small lights
1779                         case OBJ_ASTEROID:
1780                                 beam_add_light_small(l->bm, &Objects[l->objnum]);
1781                                 break;
1782
1783                         // debris gets small lights
1784                         case OBJ_DEBRIS:
1785                                 beam_add_light_small(l->bm, &Objects[l->objnum]);
1786                                 break;
1787                         }
1788                         break;
1789
1790                 // from a collision
1791                 case 2:
1792                         // a few meters from the collision point
1793                         vm_vec_sub(&dir, &l->bm->last_start, &l->c_point);
1794                         vm_vec_normalize_quick(&dir);
1795                         vm_vec_scale_add(&pt, &l->c_point, &dir, bwi->beam_muzzle_radius * 5.0f);
1796
1797                         beam_add_light_small(l->bm, &Objects[l->objnum], &pt);
1798                         break;
1799                 }
1800         }
1801 }
1802
1803 // -----------------------------===========================------------------------------
1804 // BEAM BOOKKEEPING FUNCTIONS
1805 // -----------------------------===========================------------------------------
1806
1807 // delete a beam
1808 void beam_delete(beam *b)
1809 {
1810         // remove from active list and put on free list
1811         list_remove(&Beam_used_list, b);
1812         list_append(&Beam_free_list, b);
1813
1814         // delete our associated object
1815         // SDL_assert(b->objnum >= 0);
1816         if(b->objnum >= 0){
1817                 obj_delete(b->objnum);
1818         }
1819         b->objnum = -1;
1820
1821         // kill the beam looping sound
1822         if(b->beam_sound_loop != -1){
1823                 snd_stop(b->beam_sound_loop);
1824                 b->beam_sound_loop = -1;
1825         }
1826
1827         // subtract one
1828         Beam_count--;
1829         SDL_assert(Beam_count >= 0);
1830         nprintf(("General", "Recycled beam (%d beams remaining)\n", Beam_count));
1831 }
1832
1833 // given an object, return its model num
1834 int beam_get_model(object *objp)
1835 {
1836         int subtype;
1837         SDL_assert(objp->instance >= 0);
1838         if(objp->instance < 0){
1839                 return -1;
1840         }
1841
1842         switch(objp->type){
1843         case OBJ_SHIP:
1844                 return Ships[objp->instance].modelnum;
1845
1846         case OBJ_WEAPON:
1847                 SDL_assert(Weapons[objp->instance].weapon_info_index >= 0);
1848                 if(Weapons[objp->instance].weapon_info_index < 0){
1849                         return -1;
1850                 }
1851                 return Weapon_info[Weapons[objp->instance].weapon_info_index].model_num;
1852
1853         case OBJ_DEBRIS:
1854                 SDL_assert(Debris[objp->instance].is_hull);
1855                 if(!Debris[objp->instance].is_hull){
1856                         return -1;
1857                 }
1858                 return Debris[objp->instance].model_num;
1859
1860 #if !(defined(FS2_DEMO) || defined(FS1_DEMO))
1861         case OBJ_ASTEROID:
1862                 subtype = Asteroids[objp->instance].asteroid_subtype;
1863                 SDL_assert(Asteroids[objp->instance].type >= 0);
1864                 if(Asteroids[objp->instance].type < 0){
1865                         return -1;
1866                 }
1867                 return Asteroid_info[Asteroids[objp->instance].type].model_num[subtype];
1868 #endif
1869
1870         default:
1871                 // this shouldn't happen too often
1872                 mprintf(("Beam couldn't find a good find a good object model/type!! (%d)", objp->type));
1873                 return -1;
1874         }
1875 }
1876
1877 // start the warmup phase for the beam
1878 void beam_start_warmup(beam *b)
1879 {
1880         // set the warmup stamp
1881         b->warmup_stamp = timestamp(Weapon_info[b->weapon_info_index].b_info.beam_warmup);
1882
1883         // start playing warmup sound
1884         if(!(Game_mode & GM_STANDALONE_SERVER) && (Weapon_info[b->weapon_info_index].b_info.beam_warmup_sound >= 0)){
1885                 snd_play_3d(&Snds[Weapon_info[b->weapon_info_index].b_info.beam_warmup_sound], &b->last_start, &View_position);
1886         }
1887 }
1888
1889 // start the firing phase for the beam, return 0 if the beam failed to start, and should be deleted altogether
1890 int beam_start_firing(beam *b)
1891 {
1892         // kill the warmup stamp so the rest of the code knows its firing
1893         b->warmup_stamp = -1;
1894
1895         // any special stuff for each weapon type
1896         switch(b->type){
1897         // re-aim type A and D beam weapons here, otherwise they tend to miss
1898         case BEAM_TYPE_A:
1899         case BEAM_TYPE_D:
1900                 beam_aim(b);
1901                 break;
1902
1903         case BEAM_TYPE_B:
1904                 break;
1905
1906         case BEAM_TYPE_C:
1907                 break;
1908
1909         case BEAM_TYPE_E:
1910                 break;
1911
1912         default:
1913                 Int3();
1914         }
1915
1916         // determine if we can legitimately start firing, or if we need to take other action
1917         switch(beam_ok_to_fire(b)){
1918         case -1 :
1919                 return 0;
1920
1921         case 0 :
1922                 beam_start_warmdown(b);
1923                 return 1;
1924         }
1925
1926         // start the beam firing sound now, if we haven't already
1927         if((b->beam_sound_loop == -1) && (Weapon_info[b->weapon_info_index].b_info.beam_loop_sound >= 0)){
1928                 b->beam_sound_loop = snd_play_3d(&Snds[Weapon_info[b->weapon_info_index].b_info.beam_loop_sound], &b->last_start, &View_position, 0.0f, NULL, 1, 1.0, SND_PRIORITY_SINGLE_INSTANCE, NULL, 1.0f, 1);
1929
1930                 // "shot" sound
1931                 snd_play_3d(&Snds[SND_BEAM_SHOT], &b->last_start, &View_position);
1932         }
1933
1934         // success
1935         return 1;
1936 }
1937
1938 // start the warmdown phase for the beam
1939 void beam_start_warmdown(beam *b)
1940 {
1941         // timestamp
1942         b->warmdown_stamp = timestamp(Weapon_info[b->weapon_info_index].b_info.beam_warmdown);
1943
1944         // start the warmdown sound
1945         if(Weapon_info[b->weapon_info_index].b_info.beam_warmdown_sound >= 0){
1946                 snd_play_3d(&Snds[Weapon_info[b->weapon_info_index].b_info.beam_warmdown_sound], &b->last_start, &View_position);
1947         }
1948
1949         // kill the beam looping sound
1950         if(b->beam_sound_loop != -1){
1951                 snd_stop(b->beam_sound_loop);
1952                 b->beam_sound_loop = -1;
1953         }
1954 }
1955
1956 // recalculate beam sounds (looping sounds relative to the player)
1957 void beam_recalc_sounds(beam *b)
1958 {
1959         beam_weapon_info *bwi;
1960         vector pos;
1961
1962         SDL_assert(b->weapon_info_index >= 0);
1963         if(b->weapon_info_index < 0){
1964                 return;
1965         }
1966         bwi = &Weapon_info[b->weapon_info_index].b_info;
1967
1968         // update the sound position relative to the player
1969         if(b->beam_sound_loop != -1){
1970                 // get the point closest to the player's viewing position
1971                 switch(vm_vec_dist_to_line(&View_position, &b->last_start, &b->last_shot, &pos, NULL)){
1972                 // behind the beam, so use the start pos
1973                 case -1:
1974                         pos = b->last_start;
1975                         break;
1976
1977                 // use the closest point
1978                 case 0:
1979                         // already calculated in vm_vec_dist_to_line(...)
1980                         break;
1981
1982                 // past the beam, so use the shot pos
1983                 case 1:
1984                         pos = b->last_shot;
1985                         break;
1986                 }
1987
1988                 snd_update_3d_pos(b->beam_sound_loop, &Snds[bwi->beam_loop_sound], &pos);
1989         }
1990 }
1991
1992
1993 // -----------------------------===========================------------------------------
1994 // BEAM AIMING FUNCTIONS
1995 // -----------------------------===========================------------------------------
1996
1997 // fills in binfo
1998 void beam_get_binfo(beam *b, float accuracy, int num_shots)
1999 {
2000         vector p2;
2001         int model_num, idx;
2002         vector oct1, oct2;
2003         vector turret_point, turret_norm;
2004         beam_weapon_info *bwi;
2005         int skill_level;
2006
2007         // where the shot is originating from (b->last_start gets filled in)
2008         ship_get_global_turret_gun_info(b->objp, b->subsys, &turret_point, &turret_norm, 1, &p2);
2009
2010         // get a model # to work with
2011         model_num = beam_get_model(b->target);
2012         if(model_num < 0){
2013                 return;
2014         }
2015
2016         // get beam weapon info
2017         SDL_assert(b->weapon_info_index >= 0);
2018         if(b->weapon_info_index < 0){
2019                 return;
2020         }
2021         bwi = &Weapon_info[b->weapon_info_index].b_info;
2022
2023         // skill level
2024         skill_level = Game_skill_level;
2025         if(Game_skill_level >= NUM_SKILL_LEVELS){
2026                 skill_level = NUM_SKILL_LEVELS - 1;
2027         }
2028         if(Game_skill_level < 0){
2029                 skill_level = 0;
2030         }
2031
2032         // stuff num shots even though its only used for type D weapons
2033         b->binfo.shot_count = (ubyte)num_shots;
2034         if(b->binfo.shot_count > MAX_BEAM_SHOTS){
2035                 b->binfo.shot_count = MAX_BEAM_SHOTS;
2036         }
2037
2038         // generate the proper amount of directional vectors
2039         switch(b->type){
2040         // pick an accuracy. beam will be properly aimed at actual fire time
2041         case BEAM_TYPE_A:
2042                 // all we will do is decide whether or not we will hit - type A beam weapons are re-aimed immediately before firing
2043                 b->binfo.shot_aim[0] = frand_range(0.0f, 1.0f + bwi->beam_miss_factor[skill_level] * accuracy);
2044                 b->binfo.shot_count = 1;
2045
2046                 // get random model points, this is useful for big ships, because we never miss when shooting at them
2047                 submodel_get_two_random_points(model_num, 0, &b->binfo.dir_a, &b->binfo.dir_b);
2048                 break;
2049
2050         // just 2 points in the "slash"
2051         case BEAM_TYPE_B:
2052                 beam_get_octant_points(model_num, b->target, (int)frand_range(0.0f, BEAM_NUM_GOOD_OCTANTS), Beam_good_slash_octants, &oct1, &oct2);
2053
2054                 // point 1
2055                 vm_vec_sub(&b->binfo.dir_a, &oct1, &turret_point);
2056                 vm_vec_normalize(&b->binfo.dir_a);
2057
2058                 // point 2
2059                 vm_vec_sub(&b->binfo.dir_b, &oct2, &turret_point);
2060                 vm_vec_normalize(&b->binfo.dir_b);
2061
2062                 // delta angle
2063                 b->binfo.delta_ang = fl_abs(vm_vec_delta_ang_norm(&b->binfo.dir_a, &b->binfo.dir_b, NULL));
2064                 break;
2065
2066         // nothing for this beam - its very special case
2067         case BEAM_TYPE_C:
2068                 break;
2069
2070         // type D beams fire at small ship multiple times
2071         case BEAM_TYPE_D:
2072                 // get a bunch of shot aims
2073                 for(idx=0; idx<b->binfo.shot_count; idx++){
2074                         //      MK, 9/3/99: Added pow() function to make increasingly likely to miss with subsequent shots.  30% more likely with each shot.
2075                         float r = ((float) pow(1.3f, idx)) * bwi->beam_miss_factor[skill_level] * accuracy;
2076                         b->binfo.shot_aim[idx] = frand_range(0.0f, 1.0f + r);
2077                 }
2078                 break;
2079
2080         // type e beams just fire straight
2081         case BEAM_TYPE_E:
2082                 b->binfo.shot_aim[0] = 0.0000001f;
2083                 b->binfo.shot_count = 1;
2084                 b->binfo.dir_a = turret_norm;
2085                 b->binfo.dir_b = turret_norm;
2086                 break;
2087
2088         default:
2089                 break;
2090         }
2091 }
2092
2093 // aim the beam (setup last_start and last_shot - the endpoints). also recalculates collision pairs
2094 void beam_aim(beam *b)
2095 {
2096         vector temp, p2;
2097         int model_num;
2098
2099         // type C beam weapons have no target
2100         if(b->target == NULL){
2101                 SDL_assert(b->type == BEAM_TYPE_C);
2102                 if(b->type != BEAM_TYPE_C){
2103                         return;
2104                 }
2105         }
2106         // get a model # to work with
2107         else {
2108                 model_num = beam_get_model(b->target);
2109                 if(model_num < 0){
2110                         return;
2111                 }
2112         }
2113
2114         // setup our initial shot point and aim direction
2115         switch(b->type){
2116         case BEAM_TYPE_A:
2117                 // where the shot is originating from (b->last_start gets filled in)
2118                 ship_get_global_turret_gun_info(b->objp, b->subsys, &b->last_start, &temp, 1, &p2);
2119
2120                 // if we're targeting a subsystem - shoot directly at it
2121                 if(b->target_subsys != NULL){
2122                         // unrotate the center of the subsystem
2123                         vm_vec_unrotate(&b->last_shot, &b->target_subsys->system_info->pnt, &b->target->orient);
2124                         vm_vec_add2(&b->last_shot, &b->target->pos);
2125                         vm_vec_sub(&temp, &b->last_shot, &b->last_start);
2126
2127                         vm_vec_scale_add(&b->last_shot, &b->last_start, &temp, 2.0f);
2128                         break;
2129                 }
2130
2131                 // if we're shooting at a big ship - shoot directly at the model
2132                 if((b->target->type == OBJ_SHIP) && (Ship_info[Ships[b->target->instance].ship_info_index].flags & (SIF_BIG_SHIP | SIF_HUGE_SHIP))){
2133                         // rotate into world coords
2134                         vm_vec_unrotate(&temp, &b->binfo.dir_a, &b->target->orient);
2135                         vm_vec_add2(&temp, &b->target->pos);
2136
2137                         // get the shot point
2138                         vm_vec_sub(&p2, &temp, &b->last_start);
2139                         vm_vec_scale_add(&b->last_shot, &b->last_start, &p2, 2.0f);
2140                         break;
2141                 }
2142
2143                 // point at the center of the target, then jitter based on shot_aim
2144                 b->last_shot = b->target->pos;
2145                 beam_jitter_aim(b, b->binfo.shot_aim[0]);
2146                 break;
2147
2148         case BEAM_TYPE_B:
2149                 // where the shot is originating from (b->last_start gets filled in)
2150                 ship_get_global_turret_gun_info(b->objp, b->subsys, &b->last_start, &temp, 1, &p2);
2151
2152                 // set the shot point
2153                 vm_vec_scale_add(&b->last_shot, &b->last_start, &b->binfo.dir_a, BEAM_FAR_LENGTH);
2154                 SDL_assert(is_valid_vec(&b->last_shot));
2155                 break;
2156
2157         case BEAM_TYPE_C:
2158                 // start point
2159                 temp = b->targeting_laser_offset;
2160                 vm_vec_unrotate(&b->last_start, &temp, &b->objp->orient);
2161                 vm_vec_add2(&b->last_start, &b->objp->pos);
2162                 vm_vec_scale_add(&b->last_shot, &b->last_start, &b->objp->orient.v.fvec, BEAM_FAR_LENGTH);
2163                 break;
2164
2165         case BEAM_TYPE_D:
2166                 // where the shot is originating from (b->last_start gets filled in)
2167                 ship_get_global_turret_gun_info(b->objp, b->subsys, &b->last_start, &temp, 1, &p2);
2168
2169                 // point at the center of the target, then jitter based on shot_aim
2170                 b->last_shot = b->target->pos;
2171                 beam_jitter_aim(b, b->binfo.shot_aim[b->shot_index]);
2172                 nprintf(("AI", "Frame %i: FIRING\n", Framecount));
2173                 break;
2174
2175         case BEAM_TYPE_E:
2176                 // where the shot is originating from (b->last_start gets filled in)
2177                 ship_get_global_turret_gun_info(b->objp, b->subsys, &b->last_start, &temp, 1, &p2);
2178
2179                 // point directly in the direction of the turret
2180                 vm_vec_scale_add(&b->last_shot, &b->last_start, &temp, BEAM_FAR_LENGTH);
2181                 break;
2182
2183         default:
2184                 Int3();
2185         }
2186
2187         // recalculate object pairs
2188         OBJ_RECALC_PAIRS((&Objects[b->objnum]));
2189 }
2190
2191 // given a model #, and an object, stuff 2 good world coord points
2192 void beam_get_octant_points(int modelnum, object *objp, int oct_index, int oct_array[BEAM_NUM_GOOD_OCTANTS][4], vector *v1, vector *v2)
2193 {
2194         vector t1, t2, temp;
2195         polymodel *m = model_get(modelnum);
2196
2197         // bad bad bad bad bad bad
2198         if(m == NULL){
2199                 Int3();
2200                 return;
2201         }
2202
2203         SDL_assert((oct_index >= 0) && (oct_index < BEAM_NUM_GOOD_OCTANTS));
2204
2205         // randomly pick octants
2206         t1 = oct_array[oct_index][2] ? m->octants[oct_array[oct_index][0]].max : m->octants[oct_array[oct_index][0]].min;
2207         t2 = oct_array[oct_index][3] ? m->octants[oct_array[oct_index][1]].max : m->octants[oct_array[oct_index][1]].min;
2208         SDL_assert(!vm_vec_same(&t1, &t2));
2209
2210         // get them in world coords
2211         vm_vec_unrotate(&temp, &t1, &objp->orient);
2212         vm_vec_add(v1, &temp, &objp->pos);
2213         vm_vec_unrotate(&temp, &t2, &objp->orient);
2214         vm_vec_add(v2, &temp, &objp->pos);
2215 }
2216
2217 // throw some jitter into the aim - based upon shot_aim
2218 void beam_jitter_aim(beam *b, float aim)
2219 {
2220         vector forward, circle;
2221         matrix m;
2222         float subsys_strength;
2223
2224         // if the weapons subsystem is damaged or destroyed
2225         if((b->objp != NULL) && (b->objp->signature == b->sig) && (b->objp->type == OBJ_SHIP) && (b->objp->instance >= 0) && (b->objp->instance < MAX_SHIPS)){
2226                 // get subsytem strength
2227                 subsys_strength = ship_get_subsystem_strength(&Ships[b->objp->instance], SUBSYSTEM_WEAPONS);
2228
2229                 // when subsytem strength is 0, double the aim error factor
2230                 aim += aim * (1.0f - subsys_strength);
2231         }
2232
2233         // shot aim is a direct linear factor of the target model's radius.
2234         // so, pick a random point on the circle
2235         vm_vec_sub(&forward, &b->last_shot, &b->last_start);
2236         vm_vec_normalize_quick(&forward);
2237
2238         // vector
2239         vm_vector_2_matrix(&m, &forward, NULL, NULL);
2240
2241         // get a vector on the circle - this should appear to be pretty random
2242         // vm_vec_scale_add(&circle, &b->last_shot, &m.rvec, aim * b->target->radius);
2243         vm_vec_random_in_circle(&circle, &b->last_shot, &m, aim * b->target->radius, 0);
2244
2245         // get the vector pointing to the circle point
2246         vm_vec_sub(&forward, &circle, &b->last_start);
2247         vm_vec_scale_add(&b->last_shot, &b->last_start, &forward, 2.0f);
2248 }
2249
2250
2251 // -----------------------------===========================------------------------------
2252 // BEAM COLLISION FUNCTIONS
2253 // -----------------------------===========================------------------------------
2254
2255 // collide a beam with a ship, returns 1 if we can ignore all future collisions between the 2 objects
2256 int beam_collide_ship(obj_pair *pair)
2257 {
2258         beam *b;
2259         mc_info test_collide;
2260         int model_num;
2261         float widest;
2262
2263         // bogus
2264         if(pair == NULL){
2265                 return 0;
2266         }
2267
2268         // get the beam
2269         SDL_assert(pair->a->instance >= 0);
2270         SDL_assert(pair->a->type == OBJ_BEAM);
2271         SDL_assert(Beams[pair->a->instance].objnum == OBJ_INDEX(pair->a));
2272         b = &Beams[pair->a->instance];
2273
2274         // Don't check collisions for warping out player if past stage 1.
2275         if ( Player->control_mode >= PCM_WARPOUT_STAGE1)        {
2276                 if ( pair->a == Player_obj ) return 0;
2277                 if ( pair->b == Player_obj ) return 0;
2278         }
2279
2280         // if the "warming up" timestamp has not expired
2281         if((b->warmup_stamp != -1) || (b->warmdown_stamp != -1)){
2282                 return 0;
2283         }
2284
2285         // if the beam is on "safety", don't collide with anything
2286         if(b->flags & BF_SAFETY){
2287                 return 0;
2288         }
2289
2290         // if the colliding object is the shooting object, return 1 so this is culled
2291         if(pair->b == b->objp){
2292                 return 1;
2293         }
2294
2295         // try and get a model
2296         model_num = beam_get_model(pair->b);
2297         if(model_num < 0){
2298                 // Int3();
2299                 return 1;
2300         }
2301
2302 #ifndef NDEBUG
2303         Beam_test_ints++;
2304         Beam_test_ship++;
2305 #endif
2306
2307         // bad
2308         SDL_assert(pair->b->type == OBJ_SHIP);
2309         SDL_assert(pair->b->instance >= 0);
2310         if((pair->b->type != OBJ_SHIP) || (pair->b->instance < 0)){
2311                 return 1;
2312         }
2313
2314         // get the widest portion of the beam
2315         widest = beam_get_widest(b);
2316
2317         // do the collision
2318         test_collide.model_num = model_num;
2319         test_collide.submodel_num = -1;
2320         test_collide.orient = &pair->b->orient;
2321         test_collide.pos = &pair->b->pos;
2322         test_collide.p0 = &b->last_start;
2323         test_collide.p1 = &b->last_shot;
2324
2325         // maybe do a sphereline
2326         if(widest > pair->b->radius * BEAM_AREA_PERCENT){
2327                 test_collide.radius = beam_get_widest(b) * 0.5f;
2328                 test_collide.flags = MC_CHECK_MODEL | MC_CHECK_SPHERELINE;
2329         } else {
2330                 test_collide.flags = MC_CHECK_MODEL | MC_CHECK_RAY;
2331         }
2332         model_collide(&test_collide);
2333
2334         // if we got a hit
2335         if(test_collide.num_hits){
2336                 // add to the collision list
2337                 beam_add_collision(b, pair->b, &test_collide);
2338         }
2339
2340         // add this guy to the lighting list
2341         beam_add_light(b, OBJ_INDEX(pair->b), 1, NULL);
2342
2343         // reset timestamp to timeout immediately
2344         pair->next_check_time = timestamp(0);
2345
2346         return 0;
2347 }
2348
2349 // collide a beam with an asteroid, returns 1 if we can ignore all future collisions between the 2 objects
2350 int beam_collide_asteroid(obj_pair *pair)
2351 {
2352         beam *b;
2353         mc_info test_collide;
2354         int model_num;
2355
2356         // bogus
2357         if(pair == NULL){
2358                 return 0;
2359         }
2360
2361         // get the beam
2362         SDL_assert(pair->a->instance >= 0);
2363         SDL_assert(pair->a->type == OBJ_BEAM);
2364         SDL_assert(Beams[pair->a->instance].objnum == OBJ_INDEX(pair->a));
2365         b = &Beams[pair->a->instance];
2366
2367         // if the "warming up" timestamp has not expired
2368         if((b->warmup_stamp != -1) || (b->warmdown_stamp != -1)){
2369                 return 0;
2370         }
2371
2372         // if the beam is on "safety", don't collide with anything
2373         if(b->flags & BF_SAFETY){
2374                 return 0;
2375         }
2376
2377         // if the colliding object is the shooting object, return 1 so this is culled
2378         if(pair->b == b->objp){
2379                 return 1;
2380         }
2381
2382         // try and get a model
2383         model_num = beam_get_model(pair->b);
2384         if(model_num < 0){
2385                 Int3();
2386                 return 1;
2387         }
2388
2389 #ifndef NDEBUG
2390         Beam_test_ints++;
2391         Beam_test_ast++;
2392 #endif
2393
2394         // do the collision
2395         test_collide.model_num = model_num;
2396         test_collide.submodel_num = -1;
2397         test_collide.orient = &pair->b->orient;
2398         test_collide.pos = &pair->b->pos;
2399         test_collide.p0 = &b->last_start;
2400         test_collide.p1 = &b->last_shot;
2401         test_collide.flags = MC_CHECK_MODEL | MC_CHECK_RAY;
2402         model_collide(&test_collide);
2403
2404         // if we got a hit
2405         if(test_collide.num_hits){
2406                 // add to the collision list
2407                 beam_add_collision(b, pair->b, &test_collide);
2408         }
2409
2410         // add this guy to the lighting list
2411         beam_add_light(b, OBJ_INDEX(pair->b), 1, NULL);
2412
2413         // reset timestamp to timeout immediately
2414         pair->next_check_time = timestamp(0);
2415
2416         return 0;
2417 }
2418
2419 // collide a beam with a missile, returns 1 if we can ignore all future collisions between the 2 objects
2420 int beam_collide_missile(obj_pair *pair)
2421 {
2422         beam *b;
2423         mc_info test_collide;
2424         int model_num;
2425
2426         // bogus
2427         if(pair == NULL){
2428                 return 0;
2429         }
2430
2431         // get the beam
2432         SDL_assert(pair->a->instance >= 0);
2433         SDL_assert(pair->a->type == OBJ_BEAM);
2434         SDL_assert(Beams[pair->a->instance].objnum == OBJ_INDEX(pair->a));
2435         b = &Beams[pair->a->instance];
2436
2437         // if the "warming up" timestamp has not expired
2438         if((b->warmup_stamp != -1) || (b->warmdown_stamp != -1)){
2439                 return 0;
2440         }
2441
2442         // if the beam is on "safety", don't collide with anything
2443         if(b->flags & BF_SAFETY){
2444                 return 0;
2445         }
2446
2447         // if the colliding object is the shooting object, return 1 so this is culled
2448         if(pair->b == b->objp){
2449                 return 1;
2450         }
2451
2452         // try and get a model
2453         model_num = beam_get_model(pair->b);
2454         if(model_num < 0){
2455                 //Int3();
2456                 return 1;
2457         }
2458
2459 #ifndef NDEBUG
2460         Beam_test_ints++;
2461 #endif
2462
2463         // do the collision
2464         test_collide.model_num = model_num;
2465         test_collide.submodel_num = -1;
2466         test_collide.orient = &pair->b->orient;
2467         test_collide.pos = &pair->b->pos;
2468         test_collide.p0 = &b->last_start;
2469         test_collide.p1 = &b->last_shot;
2470         test_collide.flags = MC_CHECK_MODEL | MC_CHECK_RAY;
2471         model_collide(&test_collide);
2472
2473         // if we got a hit
2474         if(test_collide.num_hits){
2475                 // add to the collision list
2476                 beam_add_collision(b, pair->b, &test_collide);
2477         }
2478
2479         // reset timestamp to timeout immediately
2480         pair->next_check_time = timestamp(0);
2481
2482         return 0;
2483 }
2484
2485 // collide a beam with debris, returns 1 if we can ignore all future collisions between the 2 objects
2486 int beam_collide_debris(obj_pair *pair)
2487 {
2488         beam *b;
2489         mc_info test_collide;
2490         int model_num;
2491
2492         // bogus
2493         if(pair == NULL){
2494                 return 0;
2495         }
2496
2497         // get the beam
2498         SDL_assert(pair->a->instance >= 0);
2499         SDL_assert(pair->a->type == OBJ_BEAM);
2500         SDL_assert(Beams[pair->a->instance].objnum == OBJ_INDEX(pair->a));
2501         b = &Beams[pair->a->instance];
2502
2503         // if the "warming up" timestamp has not expired
2504         if((b->warmup_stamp != -1) || (b->warmdown_stamp != -1)){
2505                 return 0;
2506         }
2507
2508         // if the beam is on "safety", don't collide with anything
2509         if(b->flags & BF_SAFETY){
2510                 return 0;
2511         }
2512
2513         // if the colliding object is the shooting object, return 1 so this is culled
2514         if(pair->b == b->objp){
2515                 return 1;
2516         }
2517
2518         // try and get a model
2519         model_num = beam_get_model(pair->b);
2520         if(model_num < 0){
2521                 // Int3();
2522                 return 1;
2523         }
2524
2525 #ifndef NDEBUG
2526         Beam_test_ints++;
2527 #endif
2528
2529         // do the collision
2530         test_collide.model_num = model_num;
2531         test_collide.submodel_num = -1;
2532         test_collide.orient = &pair->b->orient;
2533         test_collide.pos = &pair->b->pos;
2534         test_collide.p0 = &b->last_start;
2535         test_collide.p1 = &b->last_shot;
2536         test_collide.flags = MC_CHECK_MODEL | MC_CHECK_RAY;
2537         model_collide(&test_collide);
2538
2539         // if we got a hit
2540         if(test_collide.num_hits){
2541                 // add to the collision list
2542                 beam_add_collision(b, pair->b, &test_collide);
2543         }
2544
2545         // add this guy to the lighting list
2546         beam_add_light(b, OBJ_INDEX(pair->b), 1, NULL);
2547
2548         // reset timestamp to timeout immediately
2549         pair->next_check_time = timestamp(0);
2550
2551         return 0;
2552 }
2553
2554 // early-out function for when adding object collision pairs, return 1 if the pair should be ignored
2555 int beam_collide_early_out(object *a, object *b)
2556 {
2557         beam *bm;
2558         weapon_info *bwi;
2559         float cull_dist, cull_dot;
2560         vector dot_test, dot_test2, dist_test;
2561
2562         // get the beam
2563         SDL_assert(a->instance >= 0);
2564         if(a->instance < 0){
2565                 return 1;
2566         }
2567         SDL_assert(a->type == OBJ_BEAM);
2568         if(a->type != OBJ_BEAM){
2569                 return 1;
2570         }
2571         SDL_assert(Beams[a->instance].objnum == OBJ_INDEX(a));
2572         if(Beams[a->instance].objnum != OBJ_INDEX(a)){
2573                 return 1;
2574         }
2575         bm = &Beams[a->instance];
2576         SDL_assert(bm->weapon_info_index >= 0);
2577         if(bm->weapon_info_index < 0){
2578                 return 1;
2579         }
2580         bwi = &Weapon_info[bm->weapon_info_index];
2581
2582         // if the second object has an invalid instance, bail
2583         if(b->instance < 0){
2584                 return 1;
2585         }
2586
2587         // baseline bails
2588         switch(b->type){
2589         case OBJ_SHIP:
2590                 break;
2591         case OBJ_ASTEROID:
2592                 // targeting lasers only hit ships
2593                 if(bwi->b_info.beam_type == BEAM_TYPE_C){
2594                         return 1;
2595                 }
2596                 break;
2597         case OBJ_DEBRIS:
2598                 // targeting lasers only hit ships
2599                 if(bwi->b_info.beam_type == BEAM_TYPE_C){
2600                         return 1;
2601                 }
2602                 // don't ever collide with non hull pieces
2603                 if(!Debris[b->instance].is_hull){
2604                         return 1;
2605                 }
2606                 break;
2607         case OBJ_WEAPON:
2608                 // targeting lasers only hit ships
2609                 if(bwi->b_info.beam_type == BEAM_TYPE_C){
2610                         return 1;
2611                 }
2612                 // don't ever collide against laser weapons - duh
2613                 if(Weapon_info[Weapons[b->instance].weapon_info_index].subtype == WP_LASER){
2614                         return 1;
2615                 }
2616                 break;
2617         }
2618
2619         // get full cull value
2620         beam_get_cull_vals(b, bm, &cull_dot, &cull_dist);
2621
2622         // if the object fails these conditions, bail
2623         vm_vec_sub(&dist_test, &b->pos, &bm->last_start);
2624         dot_test = dist_test;
2625         vm_vec_sub(&dot_test2, &bm->last_shot, &bm->last_start);
2626         vm_vec_normalize_quick(&dot_test);
2627         vm_vec_normalize_quick(&dot_test2);
2628         // cull_dist == DIST SQUARED FOO!
2629         if((vm_vec_dotprod(&dot_test, &dot_test2) < cull_dot) && (vm_vec_mag_squared(&dist_test) > cull_dist)){
2630                 return 1;
2631         }
2632
2633         // don't cull
2634         return 0;
2635 }
2636
2637 // add a collision to the beam for this frame (to be evaluated later)
2638 void beam_add_collision(beam *b, object *hit_object, mc_info *cinfo)
2639 {
2640         beam_collision *bc;
2641         int idx;
2642
2643         // if we haven't reached the limit for beam collisions, just add
2644         if(b->f_collision_count < MAX_FRAME_COLLISIONS){
2645                 bc = &b->f_collisions[b->f_collision_count++];
2646                 bc->c_objnum = OBJ_INDEX(hit_object);
2647                 bc->cinfo = *cinfo;
2648
2649                 // done
2650                 return;
2651         }
2652
2653         // otherwise, we've got to do some checking, ick.
2654         // I guess we can always just remove the farthest item
2655         bc = NULL;
2656         for(idx=0; idx<MAX_FRAME_COLLISIONS; idx++){
2657                 if((bc == NULL) || (b->f_collisions[idx].cinfo.hit_dist > bc->cinfo.hit_dist)){
2658                         bc = &b->f_collisions[idx];
2659                 }
2660         }
2661
2662         // copy in
2663         SDL_assert(bc != NULL);
2664         if(bc == NULL){
2665                 return;
2666         }
2667         bc->c_objnum = OBJ_INDEX(hit_object);
2668         bc->cinfo = *cinfo;
2669 }
2670
2671 // sort collisions for the frame
2672 int beam_sort_collisions_func(const void *e1, const void *e2)
2673 {
2674         beam_collision *b1 = (beam_collision*)e1;
2675         beam_collision *b2 = (beam_collision*)e2;
2676
2677         return b1->cinfo.hit_dist < b2->cinfo.hit_dist ? -1 : 1;
2678 }
2679
2680 // handle a hit on a specific object
2681 void beam_handle_collisions(beam *b)
2682 {
2683         int idx, s_idx;
2684         beam_collision r_coll[MAX_FRAME_COLLISIONS];
2685         int r_coll_count = 0;
2686         weapon_info *wi;
2687         float widest;
2688
2689         // early out if we had no collisions
2690         if(b->f_collision_count <= 0){
2691                 return;
2692         }
2693
2694         // get beam weapon info
2695         if((b->weapon_info_index < 0) || (b->weapon_info_index >= Num_weapon_types)){
2696                 Int3();
2697                 return;
2698         }
2699
2700         wi = &Weapon_info[b->weapon_info_index];
2701
2702         // get the widest part of the beam
2703         widest = beam_get_widest(b);
2704
2705         // the first thing we need to do is sort the collisions, from closest to farthest
2706         qsort(b->f_collisions, b->f_collision_count, sizeof(beam_collision), beam_sort_collisions_func);
2707
2708         // now apply all collisions until we reach a ship which "stops" the beam or we reach the end of the list
2709         for(idx=0; idx<b->f_collision_count; idx++){
2710                 int model_num = -1;
2711                 int do_damage = 0;
2712                 int first_hit = 1;
2713                 int target = b->f_collisions[idx].c_objnum;
2714
2715                 // if we have an invalid object
2716                 if((target < 0) || (target >= MAX_OBJECTS)){
2717                         continue;
2718                 }
2719
2720                 // try and get a model to deal with
2721                 model_num = beam_get_model(&Objects[target]);
2722                 if(model_num < 0){
2723                         continue;
2724                 }
2725
2726                 // add lighting
2727                 beam_add_light(b, target, 2, &b->f_collisions[idx].cinfo.hit_point_world);
2728
2729                 // add to the recent collision list
2730                 r_coll[r_coll_count].c_objnum = target;
2731                 r_coll[r_coll_count].c_sig = Objects[target].signature;
2732                 r_coll[r_coll_count].c_stamp = -1;
2733                 r_coll[r_coll_count].cinfo = b->f_collisions[idx].cinfo;
2734
2735                 // if he was already on the recent collision list, copy his timestamp
2736                 // also, be sure not to play the impact sound again.
2737                 for(s_idx=0; s_idx<b->r_collision_count; s_idx++){
2738                         if((r_coll[r_coll_count].c_objnum == b->r_collisions[s_idx].c_objnum) && (r_coll[r_coll_count].c_sig == b->r_collisions[s_idx].c_sig)){
2739                                 // timestamp
2740                                 r_coll[r_coll_count].c_stamp = b->r_collisions[s_idx].c_stamp;
2741
2742                                 // don't play the impact sound again
2743                                 first_hit = 0;
2744                         }
2745                 }
2746
2747                 // if the damage timestamp has expired or is not set yet, apply damage
2748                 if((r_coll[r_coll_count].c_stamp == -1) || timestamp_elapsed(r_coll[r_coll_count].c_stamp)){
2749                         do_damage = 1;
2750                         r_coll[r_coll_count].c_stamp = timestamp(BEAM_DAMAGE_TIME);
2751                 }
2752
2753                 // if no damage - don't even indicate it has been hit
2754                 if(wi->damage <= 0){
2755                         do_damage = 0;
2756                 }
2757
2758                 // increment collision count
2759                 r_coll_count++;
2760
2761                 // play the impact sound
2762                 if(first_hit){
2763                         snd_play_3d( &Snds[wi->impact_snd], &b->f_collisions[idx].cinfo.hit_point_world, &Eye_position );
2764                 }
2765
2766                 // do damage
2767                 if(do_damage && !physics_paused){
2768                         // maybe draw an explosion
2769                         if(wi->impact_weapon_expl_index >= 0){
2770                                 int ani_handle = weapon_get_expl_handle(wi->impact_weapon_expl_index, &b->f_collisions[idx].cinfo.hit_point_world, wi->impact_explosion_radius);
2771                                 particle_create( &b->f_collisions[idx].cinfo.hit_point_world, &vmd_zero_vector, 0.0f, wi->impact_explosion_radius, PARTICLE_BITMAP_PERSISTENT, ani_handle );
2772                         }
2773
2774                         switch(Objects[target].type){
2775                         case OBJ_DEBRIS:
2776                                 // hit the debris - the debris hit code takes care of checking for MULTIPLAYER_CLIENT, etc
2777                                 debris_hit(&Objects[target], &Objects[b->objnum], &b->f_collisions[idx].cinfo.hit_point_world, Weapon_info[b->weapon_info_index].damage);
2778                                 break;
2779
2780                         case OBJ_WEAPON:
2781                                 // detonate the missile
2782                                 SDL_assert(Weapon_info[Weapons[Objects[target].instance].weapon_info_index].subtype == WP_MISSILE);
2783                                 if(!(Game_mode & GM_MULTIPLAYER) || MULTIPLAYER_MASTER){
2784                                         weapon_hit(&Objects[target], NULL, &Objects[target].pos);
2785                                 }
2786                                 break;
2787
2788                         case OBJ_ASTEROID:
2789                                 // hit the asteroid
2790                                 if(!(Game_mode & GM_MULTIPLAYER) || MULTIPLAYER_MASTER){
2791                                         asteroid_hit(&Objects[target], &Objects[b->objnum], &b->f_collisions[idx].cinfo.hit_point_world, Weapon_info[b->weapon_info_index].damage);
2792                                 }
2793                                 break;
2794
2795                         case OBJ_SHIP:
2796                                 // hit the ship - again, the innards of this code handle multiplayer cases
2797                                 // maybe vaporize ship.
2798                                 ship_apply_local_damage(&Objects[target], &Objects[b->objnum], &b->f_collisions[idx].cinfo.hit_point_world, beam_get_ship_damage(b, &Objects[target]), -1);
2799
2800                                 // if this is the first hit on the player ship. whack him
2801                                 if(do_damage){
2802                                         beam_apply_whack(b, &Objects[target], &b->f_collisions[idx].cinfo.hit_point_world);
2803                                 }
2804                                 break;
2805                         }
2806                 }
2807
2808                 // if the radius of the target is somewhat close to the radius of the beam, "stop" the beam here
2809                 // for now : if its smaller than about 1/3 the radius of the ship
2810                 if(widest <= (Objects[target].radius * BEAM_AREA_PERCENT) && !beam_will_tool_target(b, &Objects[target])){
2811                         // set last_shot so we know where to properly draw the beam
2812                         b->last_shot = b->f_collisions[idx].cinfo.hit_point_world;
2813                         SDL_assert(is_valid_vec(&b->last_shot));
2814
2815                         // done wif the beam
2816                         break;
2817                 }
2818         }
2819
2820         // store the new recent collisions
2821         for(idx=0; idx<r_coll_count; idx++){
2822                 b->r_collisions[idx] = r_coll[idx];
2823         }
2824         b->r_collision_count = r_coll_count;
2825 }
2826
2827 // for a given object, and a firing beam, determine its critical dot product and range
2828 void beam_get_cull_vals(object *objp, beam *b, float *cull_dot, float *cull_dist)
2829 {
2830         switch(objp->type){
2831         // debris and asteroids are classified as slow moving small objects
2832         // use cull_dot == potential cone of beam + 10% and 50.0 meters
2833         case OBJ_DEBRIS:
2834         case OBJ_ASTEROID:
2835                 *cull_dot = 1.0f - ((1.0f - beam_get_cone_dot(b)) * 1.10f);
2836                 *cull_dist = 50.0f * 50.0f;
2837                 return;
2838
2839         // treat missiles as fast-moving small objects
2840         case OBJ_WEAPON:
2841                 *cull_dot = 1.0f - ((1.0f - beam_get_cone_dot(b)) * 1.5f);
2842                 *cull_dist = 300.0f * 300.0f;
2843                 return;
2844
2845         case OBJ_SHIP:
2846                 // for cap ships, only cull for 90deg or better
2847                 /*
2848                 if(Ship_info[Ships[objp->instance].ship_info_index].flags & SIF_CAPITAL){
2849                         *cull_dot = 0.0f;
2850                         *cull_dist = 0.0f;
2851                         return;
2852                 }
2853                 */
2854
2855                 // for large ships, cull at some multiple of the radius
2856                 if(Ship_info[Ships[objp->instance].ship_info_index].flags & (SIF_BIG_SHIP | SIF_HUGE_SHIP)){
2857                         *cull_dot = 1.0f - ((1.0f - beam_get_cone_dot(b)) * 1.25f);
2858
2859                         *cull_dist = (objp->radius * 1.3f) * (objp->radius * 1.3f);
2860                         return;
2861                 }
2862
2863                 // for everthing else, cull the same as missiles
2864                 *cull_dot = 1.0f - ((1.0f - beam_get_cone_dot(b)) * 1.5f);
2865                 *cull_dist = 300.0f * 300.0f;
2866                 return;
2867         }
2868
2869         // BAD BAD BAD - but this code will cause everything to cull properly
2870         Int3();
2871         *cull_dot = 1.0f;
2872         *cull_dist = 0.0f;
2873         return;
2874 }
2875
2876 // FIXME - make sure we are truthfull representing the "cone" for all beam types
2877 // get the total possible cone for a given beam in radians
2878 float beam_get_cone_dot(beam *b)
2879 {
2880         switch(b->type){
2881         case BEAM_TYPE_A:
2882         case BEAM_TYPE_C:
2883         case BEAM_TYPE_D:
2884         case BEAM_TYPE_E:
2885                 // even though these beams don't move, return a _very_ small value
2886                 return (float)cos(fl_radian(50.5f));
2887
2888         case BEAM_TYPE_B:
2889                 return vm_vec_dotprod(&b->binfo.dir_a, &b->binfo.dir_b);
2890
2891         default:
2892                 Int3();
2893         }
2894
2895         Int3();
2896         return 0.0f;
2897 }
2898
2899 // if it is legal for the beam to fire, or continue firing
2900 int beam_ok_to_fire(beam *b)
2901 {
2902         // type C beams are ok to fire all the time
2903         if(Weapon_info[b->weapon_info_index].b_info.beam_type == BEAM_TYPE_C){
2904                 return 1;
2905         }
2906
2907         // if my own object is invalid, stop firing
2908         if(b->objp->signature != b->sig){
2909                 mprintf(("BEAM : killing beam because of invalid parent object SIGNATURE!\n"));
2910                 return -1;
2911         }
2912
2913         // if my own object is a ghost
2914         if(b->objp->type != OBJ_SHIP){
2915                 mprintf(("BEAM : killing beam because of invalid parent object TYPE!\n"));
2916                 return -1;
2917         }
2918
2919         // if the shooting turret is destroyed
2920         if(b->subsys->current_hits <= 0.0f){
2921                 mprintf(("BEAM : killing beam because turret has been destroyed!\n"));
2922                 return -1;
2923         }
2924
2925         // if the beam will be firing out of its FOV, power it down
2926         vector aim_dir, temp;
2927         vector turret_dir, turret_pos;
2928         vm_vec_sub(&aim_dir, &b->last_shot, &b->last_start);
2929         vm_vec_normalize(&aim_dir);
2930         ship_get_global_turret_gun_info(b->objp, b->subsys, &turret_pos, &turret_dir, 1, &temp);
2931         if(vm_vec_dotprod(&aim_dir, &turret_dir) < b->subsys->system_info->turret_fov){
2932                 mprintf(("BEAM : powering beam down because of FOV condition!\n"));
2933                 return 0;
2934         }
2935
2936         // ok to fire/continue firing
2937         return 1;
2938 }
2939
2940 // get the width of the widest section of the beam
2941 float beam_get_widest(beam *b)
2942 {
2943         int idx;
2944         float widest = -1.0f;
2945
2946         // sanity
2947         SDL_assert(b->weapon_info_index >= 0);
2948         if(b->weapon_info_index < 0){
2949                 return -1.0f;
2950         }
2951
2952         // lookup
2953         for(idx=0; idx<Weapon_info[b->weapon_info_index].b_info.beam_num_sections; idx++){
2954                 if(Weapon_info[b->weapon_info_index].b_info.sections[idx].width > widest){
2955                         widest = Weapon_info[b->weapon_info_index].b_info.sections[idx].width;
2956                 }
2957         }
2958
2959         // return
2960         return widest * b->shrink;
2961 }
2962
2963 // apply a whack to a ship
2964 void beam_apply_whack(beam *b, object *objp, vector *hit_point)
2965 {
2966         weapon_info *wip;
2967         ship *shipp;
2968
2969         // sanity
2970         SDL_assert((b != NULL) && (objp != NULL) && (hit_point != NULL));
2971         if((b == NULL) || (objp == NULL) || (hit_point == NULL)){
2972                 return;
2973         }
2974         SDL_assert(b->weapon_info_index >= 0);
2975         wip = &Weapon_info[b->weapon_info_index];
2976         SDL_assert((objp != NULL) && (objp->type == OBJ_SHIP) && (objp->instance >= 0) && (objp->instance < MAX_SHIPS));
2977         if((objp == NULL) || (objp->type != OBJ_SHIP) || (objp->instance < 0) || (objp->instance >= MAX_SHIPS)){
2978                 return;
2979         }
2980         shipp = &Ships[objp->instance];
2981         if((shipp->ai_index < 0) || (shipp->ai_index >= MAX_AI_INFO)){
2982                 return;
2983         }
2984
2985         // don't whack docking ships
2986         if(Ai_info[shipp->ai_index].ai_flags & AIF_DOCKED){
2987                 return;
2988         }
2989
2990         // determine how big of a whack to apply
2991         float whack;
2992         float dist;
2993
2994         if(wip->damage < b_whack_damage){
2995                 whack = b_whack_small;
2996         } else {
2997                 whack = b_whack_big;
2998         }
2999
3000         // whack direction
3001         vector whack_dir, temp;
3002         vm_vec_dist_to_line(&objp->pos, &b->last_start, &b->last_shot, &temp, &dist);
3003         vm_vec_sub(&whack_dir, &objp->pos, &temp);
3004         vm_vec_normalize(&whack_dir);
3005         vm_vec_scale(&whack_dir, whack);
3006
3007         // apply the whack
3008         ship_apply_whack(&whack_dir, hit_point, objp);
3009 }
3010
3011 // return the amount of damage which should be applied to a ship. basically, filters friendly fire damage
3012 float beam_get_ship_damage(beam *b, object *objp)
3013 {
3014         // if the beam is on the same team as the object
3015         SDL_assert((objp != NULL) && (b != NULL));
3016         if((objp == NULL) || (b == NULL)){
3017                 return 0.0f;
3018         }
3019         SDL_assert((objp->type == OBJ_SHIP) && (objp->instance >= 0) && (objp->instance < MAX_SHIPS));
3020         if((objp->type != OBJ_SHIP) || (objp->instance < 0) || (objp->instance >= MAX_SHIPS)){
3021                 return 0.0f;
3022         }
3023
3024         // same team. yikes
3025         if((b->team == Ships[objp->instance].team) && (Weapon_info[b->weapon_info_index].damage > Beam_friendly_cap[Game_skill_level])){
3026                 return Beam_friendly_cap[Game_skill_level];
3027         }
3028
3029         // normal damage
3030         return Weapon_info[b->weapon_info_index].damage;
3031 }
3032
3033 // if the beam is likely to tool a given target before its lifetime expires
3034 int beam_will_tool_target(beam *b, object *objp)
3035 {
3036         weapon_info *wip = &Weapon_info[b->weapon_info_index];
3037         float damage_in_a_few_seconds;
3038
3039         // sanity
3040         if(objp == NULL){
3041                 return 0;
3042         }
3043
3044         // if the object is not a ship, bail
3045         if(objp->type != OBJ_SHIP){
3046                 return 0;
3047         }
3048         if((objp->instance < 0) || (objp->instance >= MAX_SHIPS)){
3049                 return 0;
3050         }
3051
3052         // if the beam is going to apply more damage in about 1 and a half than the hull of the ship can take
3053         damage_in_a_few_seconds = (TOOLTIME / (float)BEAM_DAMAGE_TIME) * wip->damage;
3054         if(objp->hull_strength < damage_in_a_few_seconds){
3055
3056                 // tooled
3057                 return 1;
3058         }
3059
3060         return 0;
3061 }
3062
3063 float beam_accuracy = 1.0f;
3064 DCF(b_aim, "")
3065 {
3066         dc_get_arg(ARG_FLOAT);
3067         beam_accuracy = Dc_arg_float;
3068 }
3069 DCF(beam_list, "")
3070 {
3071         int idx;
3072         int b_count = 0;
3073
3074         for(idx=0; idx<Num_weapon_types; idx++){
3075                 if(Weapon_info[idx].wi_flags & WIF_BEAM){
3076                         b_count++;
3077                         dc_printf("Beam %d : %s\n", b_count, Weapon_info[idx].name);
3078                 }
3079         }
3080 }
3081 void beam_test(int whee)
3082 {
3083         int s1, s2;
3084         object *orion, *fenris;
3085         ship_subsys *lookup;
3086         ship_subsys *orion_turret = NULL;
3087         ship_subsys *fenris_turret = NULL;
3088         beam_fire_info f;
3089 #ifndef NDEBUG
3090         ship_subsys *orion_radar = NULL, *fenris_radar = NULL;
3091 #endif
3092
3093         nprintf(("General", "Running beam test\n"));
3094
3095         // lookup some stuff
3096         s1 = ship_name_lookup("GTD Orion 1");
3097         SDL_assert(s1 >= 0);
3098         orion = &Objects[Ships[s1].objnum];
3099         s2 = ship_name_lookup("GTC Fenris 2");
3100         SDL_assert(s2 >= 0);
3101         fenris = &Objects[Ships[s2].objnum];
3102
3103         // get beam weapons
3104         lookup = GET_FIRST(&Ships[s1].subsys_list);
3105         while(lookup != END_OF_LIST(&Ships[s1].subsys_list)){
3106                 // turret
3107                 if((lookup->system_info->type == SUBSYSTEM_TURRET) && !SDL_strcasecmp(lookup->system_info->subobj_name, "turret07")){
3108                         orion_turret = lookup;
3109                 }
3110
3111 #ifndef NDEBUG
3112                 // radar
3113                 if(lookup->system_info->type == SUBSYSTEM_RADAR){
3114                         orion_radar = lookup;
3115                 }
3116 #endif
3117
3118                 lookup = GET_NEXT(lookup);
3119         }
3120         SDL_assert(orion_turret != NULL);
3121
3122         lookup = GET_FIRST(&Ships[s2].subsys_list);
3123         while(lookup != END_OF_LIST(&Ships[s2].subsys_list)){
3124                 // turret
3125                 if((lookup->system_info->type == SUBSYSTEM_TURRET) && !SDL_strcasecmp(lookup->system_info->subobj_name, "turret07")){
3126                         fenris_turret = lookup;
3127                 }
3128
3129 #ifndef NDEBUG
3130                 // radar
3131                 if(lookup->system_info->type == SUBSYSTEM_RADAR){
3132                         fenris_radar = lookup;
3133                 }
3134 #endif
3135
3136                 lookup = GET_NEXT(lookup);
3137         }
3138         SDL_assert(fenris_turret != NULL);
3139
3140 #ifndef NDEBUG
3141         SDL_assert(orion_radar != NULL);
3142         SDL_assert(fenris_radar != NULL);
3143 #endif
3144
3145         memset(&f, 0, sizeof(beam_fire_info));
3146         f.accuracy = beam_accuracy;
3147         f.beam_info_index = -1;
3148         f.beam_info_override = NULL;
3149         f.shooter = orion;
3150         f.target = fenris;
3151         f.target_subsys = fenris_turret;
3152         f.turret = orion_turret;
3153
3154         // find the first beam
3155         int idx;
3156         int beam_first = -1;
3157         int beam_count = 0;
3158
3159         for(idx=0; idx<Num_weapon_types; idx++){
3160                 if(Weapon_info[idx].wi_flags & WIF_BEAM){
3161                         beam_count++;
3162                         if(beam_count > 1){
3163                                 beam_first = idx;
3164                                 break;
3165                         }
3166                 }
3167         }
3168         if(beam_first < 0){
3169                 return;
3170         }
3171
3172         // maybe fire it, if its valid
3173         f.beam_info_index = beam_first + whee - 1;
3174         if(Weapon_info[f.beam_info_index].wi_flags & WIF_BEAM){
3175                 HUD_printf("Firing %s\n", Weapon_info[f.beam_info_index].name);
3176                 beam_fire(&f);
3177         }
3178 }
3179
3180 void beam_test_new(int whee)
3181 {
3182         int s2, s3;
3183         object *fenris, *alpha;
3184         ship_subsys *fenris_turret, *lookup;
3185         beam_fire_info f;
3186
3187         nprintf(("General", "Running beam test\n"));
3188
3189         // lookup some stuff
3190         s2 = ship_name_lookup("GTC Fenris 2");
3191         SDL_assert(s2 >= 0);
3192         fenris = &Objects[Ships[s2].objnum];
3193         s3 = ship_name_lookup("Alpha 1");
3194         SDL_assert(s3 >= 0);
3195         alpha = &Objects[Ships[s3].objnum];
3196
3197         // get beam weapons
3198         lookup = GET_FIRST(&Ships[s2].subsys_list);
3199         fenris_turret = NULL;
3200         while(lookup != END_OF_LIST(&Ships[s2].subsys_list)){
3201                 // turret
3202                 if((lookup->system_info->type == SUBSYSTEM_TURRET) && !SDL_strcasecmp(lookup->system_info->subobj_name, "turret03")){
3203                         fenris_turret = lookup;
3204                         break;
3205                 }
3206
3207                 lookup = GET_NEXT(lookup);
3208         }
3209         SDL_assert(fenris_turret != NULL);
3210
3211         memset(&f, 0, sizeof(beam_fire_info));
3212         f.accuracy = beam_accuracy;
3213         f.beam_info_override = NULL;
3214         f.shooter = fenris;
3215         f.target = alpha;
3216         f.target_subsys = NULL;
3217         f.turret = fenris_turret;
3218         f.num_shots = 3;
3219
3220         // find the first beam
3221         int idx;
3222         int beam_first = -1;
3223         int beam_count = 0;
3224
3225         for(idx=0; idx<Num_weapon_types; idx++){
3226                 if(Weapon_info[idx].wi_flags & WIF_BEAM){
3227                         beam_count++;
3228                         if(beam_count > 1){
3229                                 beam_first = idx;
3230                                 break;
3231                         }
3232                 }
3233         }
3234         if(beam_first < 0){
3235                 return;
3236         }
3237
3238         // maybe fire it, if its valid
3239         f.beam_info_index = beam_first + whee - 1;
3240         if(Weapon_info[f.beam_info_index].wi_flags & WIF_BEAM){
3241                 HUD_printf("Firing %s\n", Weapon_info[f.beam_info_index].name);
3242                 beam_fire(&f);
3243         }
3244 }