main/fireball.c

   1 /*
   2 THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
   3 SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
   4 END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
   5 ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
   6 IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
   7 SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
   8 FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
   9 CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
  10 AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
  11 COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
  12 */
  13
  14 #ifdef HAVE_CONFIG_H
  15 #include <conf.h>
  16 #endif
  17
  18 #include <stdlib.h>
  19 #include <stdio.h>
  20 #include <string.h>
  21
  22 #include "error.h"
  23 #include "fix.h"
  24 #include "vecmat.h"
  25 #include "gr.h"
  26 #include "3d.h"
  27
  28 #include "inferno.h"
  29 #include "object.h"
  30 #include "vclip.h"
  31 #include "game.h"
  32 #include "mono.h"
  33 #include "polyobj.h"
  34 #include "sounds.h"
  35 #include "player.h"
  36 #include "gauges.h"
  37 #include "powerup.h"
  38 #include "bm.h"
  39 #include "ai.h"
  40 #include "weapon.h"
  41 #include "fireball.h"
  42 #include "collide.h"
  43 #include "newmenu.h"
  44 #include "network.h"
  45 #include "gameseq.h"
  46 #include "physics.h"
  47 #include "scores.h"
  48 #include "laser.h"
  49 #include "wall.h"
  50 #include "multi.h"
  51 #include "endlevel.h"
  52 #include "timer.h"
  53 #include "fuelcen.h"
  54 #include "cntrlcen.h"
  55 #include "gameseg.h"
  56 #include "automap.h"
  57
  58 #define EXPLOSION_SCALE (F1_0*5/2)              //explosion is the obj size times this
  59
  60 fix     Flash_effect=0;
  61 //--unused-- ubyte      Frame_processed[MAX_OBJECTS];
  62
  63 int     PK1=1, PK2=8;
  64
  65 object *object_create_explosion_sub(object *objp, short segnum, vms_vector * position, fix size, int vclip_type, fix maxdamage, fix maxdistance, fix maxforce, int parent )
  66 {
  67         int objnum;
  68         object *obj;
  69
  70         objnum = obj_create( OBJ_FIREBALL,vclip_type,segnum,position,&vmd_identity_matrix,size,
  71                                         CT_EXPLOSION,MT_NONE,RT_FIREBALL);
  72
  73         if (objnum < 0 ) {
  74                 mprintf((1, "Can't create object in object_create_explosion_sub.\n"));
  75                 return NULL;
  76         }
  77
  78         obj = &Objects[objnum];
  79
  80         //mprintf( 0, "Fireball created at %d, %d, %d\n", obj->pos.x, obj->pos.y, obj->pos.z );
  81
  82         //now set explosion-specific data
  83
  84         obj->lifeleft = Vclip[vclip_type ].play_time;
  85         obj->ctype.expl_info.spawn_time = -1;
  86         obj->ctype.expl_info.delete_objnum = -1;
  87         obj->ctype.expl_info.delete_time = -1;
  88
  89         if (maxdamage > 0) {
  90                 fix dist, force;
  91                 vms_vector pos_hit, vforce;
  92                 fix damage;
  93                 int i;
  94                 object * obj0p = &Objects[0];
  95
  96                 // -- now legal for badass explosions on a wall. Assert(objp != NULL);
  97
  98                 for (i=0; i<=Highest_object_index; i++ )        {
  99                         //      Weapons used to be affected by badass explosions, but this introduces serious problems.
 100                         //      When a smart bomb blows up, if one of its children goes right towards a nearby wall, it will
 101                         //      blow up, blowing up all the children.  So I remove it.  MK, 09/11/94
 102                         if ( (obj0p!=objp) && !(obj0p->flags&OF_SHOULD_BE_DEAD) && ((obj0p->type==OBJ_WEAPON && (obj0p->id==PROXIMITY_ID || obj0p->id==SUPERPROX_ID || obj0p->id==PMINE_ID)) || (obj0p->type == OBJ_CNTRLCEN) || (obj0p->type==OBJ_PLAYER) || ((obj0p->type==OBJ_ROBOT) && ((Objects[parent].type != OBJ_ROBOT) || (Objects[parent].id != obj0p->id))))) {
 103                                 dist = vm_vec_dist_quick( &obj0p->pos, &obj->pos );
 104                                 // Make damage be from 'maxdamage' to 0.0, where 0.0 is 'maxdistance' away;
 105                                 if ( dist < maxdistance ) {
 106                                         if (object_to_object_visibility(obj, obj0p, FQ_TRANSWALL)) {
 107
 108                                                 damage = maxdamage - fixmuldiv( dist, maxdamage, maxdistance );
 109                                                 force = maxforce - fixmuldiv( dist, maxforce, maxdistance );
 110
 111                                                 // Find the force vector on the object
 112                                                 vm_vec_normalized_dir_quick( &vforce, &obj0p->pos, &obj->pos );
 113                                                 vm_vec_scale(&vforce, force );
 114
 115                                                 // Find where the point of impact is... ( pos_hit )
 116                                                 vm_vec_scale(vm_vec_sub(&pos_hit, &obj->pos, &obj0p->pos), fixdiv(obj0p->size, obj0p->size + dist));
 117
 118                                                 switch ( obj0p->type )  {
 119                                                         case OBJ_WEAPON:
 120                                                                 phys_apply_force(obj0p,&vforce);
 121
 122                                                                 if (obj0p->id == PROXIMITY_ID || obj0p->id == SUPERPROX_ID) {           //prox bombs have chance of blowing up
 123                                                                         if (fixmul(dist,force) > i2f(8000)) {
 124                                                                                 obj0p->flags |= OF_SHOULD_BE_DEAD;
 125                                                                                 explode_badass_weapon(obj0p,&obj0p->pos);
 126                                                                         }
 127                                                                 }
 128                                                                 break;
 129
 130                                                         case OBJ_ROBOT:
 131                                                                 {
 132                                                                 phys_apply_force(obj0p,&vforce);
 133
 134                                                                 //      If not a boss, stun for 2 seconds at 32 force, 1 second at 16 force
 135                                                                 if ((objp != NULL) && (!Robot_info[obj0p->id].boss_flag) && (Weapon_info[objp->id].flash)) {
 136                                                                         ai_static       *aip = &obj0p->ctype.ai_info;
 137                                                                         int                     force_val = f2i(fixdiv(vm_vec_mag_quick(&vforce) * Weapon_info[objp->id].flash, FrameTime)/128) + 2;
 138
 139                                                                         if (obj->ctype.ai_info.SKIP_AI_COUNT * FrameTime < F1_0) {
 140                                                                                 aip->SKIP_AI_COUNT += force_val;
 141                                                                                 obj0p->mtype.phys_info.rotthrust.x = ((d_rand() - 16384) * force_val)/16;
 142                                                                                 obj0p->mtype.phys_info.rotthrust.y = ((d_rand() - 16384) * force_val)/16;
 143                                                                                 obj0p->mtype.phys_info.rotthrust.z = ((d_rand() - 16384) * force_val)/16;
 144                                                                                 obj0p->mtype.phys_info.flags |= PF_USES_THRUST;
 145
 146                                                                                 //@@if (Robot_info[obj0p->id].companion)
 147                                                                                 //@@    buddy_message("Daisy, Daisy, Give me...");
 148                                                                         } else
 149                                                                                 aip->SKIP_AI_COUNT--;
 150
 151                                                                 }
 152
 153                                                                 //      When a robot gets whacked by a badass force, he looks towards it because robots tend to get blasted from behind.
 154                                                                 {
 155                                                                         vms_vector neg_vforce;
 156                                                                         neg_vforce.x = vforce.x * -2 * (7 - Difficulty_level)/8;
 157                                                                         neg_vforce.y = vforce.y * -2 * (7 - Difficulty_level)/8;
 158                                                                         neg_vforce.z = vforce.z * -2 * (7 - Difficulty_level)/8;
 159                                                                         phys_apply_rot(obj0p,&neg_vforce);
 160                                                                 }
 161                                                                 if ( obj0p->shields >= 0 ) {
 162                                                                         if (Robot_info[obj0p->id].boss_flag)
 163                                                                                 if (Boss_invulnerable_matter[Robot_info[obj0p->id].boss_flag-BOSS_D2])
 164                                                                                         damage /= 4;
 165
 166                                                                         if (apply_damage_to_robot(obj0p, damage, parent))
 167                                                                                 if ((objp != NULL) && (parent == Players[Player_num].objnum))
 168                                                                                         add_points_to_score(Robot_info[obj0p->id].score_value);
 169                                                                 }
 170
 171                                                                 if ((objp != NULL) && (Robot_info[obj0p->id].companion) && (!Weapon_info[objp->id].flash)) {
 172                                                                         int     i, count;
 173                                                                         char    ouch_str[6*4 + 2];
 174
 175                                                                         count = f2i(damage/8);
 176                                                                         if (count > 4)
 177                                                                                 count = 4;
 178                                                                         else if (count <= 0)
 179                                                                                 count = 1;
 180                                                                         ouch_str[0] = 0;
 181                                                                         for (i=0; i<count; i++)
 182                                                                                 strcat(ouch_str, "ouch! ");
 183
 184                                                                         buddy_message(ouch_str);
 185                                                                 }
 186                                                                 break;
 187                                                                 }
 188                                                         case OBJ_CNTRLCEN:
 189                                                                 if ( obj0p->shields >= 0 ) {
 190                                                                         apply_damage_to_controlcen(obj0p, damage, parent );
 191                                                                 }
 192                                                                 break;
 193                                                         case OBJ_PLAYER:        {
 194                                                                 object * killer=NULL;
 195                                                                 vms_vector      vforce2;
 196
 197                                                                 //      Hack! Warning! Test code!
 198                                                                 if ((objp != NULL) && Weapon_info[objp->id].flash && obj0p->id==Player_num) {
 199                                                                         int     fe;
 200
 201                                                                         fe = min(F1_0*4, force*Weapon_info[objp->id].flash/32); //      For four seconds or less
 202
 203                                                                         if (objp->ctype.laser_info.parent_signature == ConsoleObject->signature) {
 204                                                                                 fe /= 2;
 205                                                                                 force /= 2;
 206                                                                         }
 207                                                                         if (force > F1_0) {
 208                                                                                 Flash_effect = fe;
 209                                                                                 PALETTE_FLASH_ADD(PK1 + f2i(PK2*force), PK1 + f2i(PK2*force), PK1 + f2i(PK2*force));
 210                                                                                 mprintf((0, "force = %7.3f, adding %i\n", f2fl(force), PK1 + f2i(PK2*force)));
 211                                                                         }
 212                                                                 }
 213
 214                                                                 if ((objp != NULL) && (Game_mode & GM_MULTI) && (objp->type == OBJ_PLAYER)) {
 215                                                                         killer = objp;
 216                                                                 }
 217                                                                 vforce2 = vforce;
 218                                                                 if (parent > -1 ) {
 219                                                                         killer = &Objects[parent];
 220                                                                         if (killer != ConsoleObject)            // if someone else whacks you, cut force by 2x
 221                                                                                 vforce2.x /= 2; vforce2.y /= 2; vforce2.z /= 2;
 222                                                                 }
 223                                                                 vforce2.x /= 2; vforce2.y /= 2; vforce2.z /= 2;
 224
 225                                                                 phys_apply_force(obj0p,&vforce);
 226                                                                 phys_apply_rot(obj0p,&vforce2);
 227                                                                 if (Difficulty_level == 0)
 228                                                                         damage /= 4;
 229                                                                 if ( obj0p->shields >= 0 )
 230                                                                         apply_damage_to_player(obj0p, killer, damage );
 231                                                         }
 232                                                                 break;
 233
 234                                                         default:
 235                                                                 Int3(); //      Illegal object type
 236                                                 }       // end switch
 237                                         } else {
 238                                                 ; // mprintf((0, "No badass: robot=%2i, dist=%7.3f, maxdistance=%7.3f .\n", i, f2fl(dist), f2fl(maxdistance)));
 239                                         }       // end if (object_to_object_visibility...
 240                                 }       // end if (dist < maxdistance)
 241                         }
 242                         obj0p++;
 243                 }       // end for
 244         }       // end if (maxdamage...
 245
 246 //      mprintf(0, "\n");
 247
 248         return obj;
 249
 250 }
 251
 252
 253 object *object_create_muzzle_flash(short segnum, vms_vector * position, fix size, int vclip_type )
 254 {
 255         return object_create_explosion_sub(NULL, segnum, position, size, vclip_type, 0, 0, 0, -1 );
 256 }
 257
 258 object *object_create_explosion(short segnum, vms_vector * position, fix size, int vclip_type )
 259 {
 260         return object_create_explosion_sub(NULL, segnum, position, size, vclip_type, 0, 0, 0, -1 );
 261 }
 262
 263 object *object_create_badass_explosion(object *objp, short segnum, vms_vector * position, fix size, int vclip_type, fix maxdamage, fix maxdistance, fix maxforce, int parent )
 264 {
 265         object  *rval;
 266
 267         rval = object_create_explosion_sub(objp, segnum, position, size, vclip_type, maxdamage, maxdistance, maxforce, parent );
 268
 269         if ((objp != NULL) && (objp->type == OBJ_WEAPON))
 270                 create_smart_children(objp, NUM_SMART_CHILDREN);
 271
 272 // --   if (objp->type == OBJ_ROBOT)
 273 // --           if (Robot_info[objp->id].smart_blobs)
 274 // --                   create_smart_children(objp, Robot_info[objp->id].smart_blobs);
 275
 276         return rval;
 277 }
 278
 279 //blows up a badass weapon, creating the badass explosion
 280 //return the explosion object
 281 object *explode_badass_weapon(object *obj,vms_vector *pos)
 282 {
 283         weapon_info *wi = &Weapon_info[obj->id];
 284
 285         Assert(wi->damage_radius);
 286
 287         if ((obj->id == EARTHSHAKER_ID) || (obj->id == ROBOT_EARTHSHAKER_ID))
 288                 smega_rock_stuff();
 289
 290         digi_link_sound_to_object(SOUND_BADASS_EXPLOSION, obj-Objects, 0, F1_0);
 291
 292         return object_create_badass_explosion( obj, obj->segnum, pos,
 293                                         wi->impact_size,
 294                                         wi->robot_hit_vclip,
 295                                         wi->strength[Difficulty_level],
 296                                         wi->damage_radius,wi->strength[Difficulty_level],
 297                                         obj->ctype.laser_info.parent_num );
 298
 299 }
 300
 301 object *explode_badass_object(object *objp, fix damage, fix distance, fix force)
 302 {
 303
 304         object  *rval;
 305
 306         rval = object_create_badass_explosion(objp, objp->segnum, &objp->pos, objp->size,
 307                                         get_explosion_vclip(objp, 0),
 308                                         damage, distance, force,
 309                                         objp-Objects);
 310         if (rval)
 311                 digi_link_sound_to_object(SOUND_BADASS_EXPLOSION, rval-Objects, 0, F1_0);
 312
 313         return (rval);
 314
 315 }
 316
 317 //blows up the player with a badass explosion
 318 //return the explosion object
 319 object *explode_badass_player(object *objp)
 320 {
 321         return explode_badass_object(objp, F1_0*50, F1_0*40, F1_0*150);
 322 }
 323
 324
 325 #define DEBRIS_LIFE (f1_0 * 2)          //lifespan in seconds
 326
 327 object *object_create_debris(object *parent, int subobj_num)
 328 {
 329         int objnum;
 330         object *obj;
 331         polymodel *po;
 332
 333         Assert((parent->type == OBJ_ROBOT) || (parent->type == OBJ_PLAYER)  );
 334
 335         objnum = obj_create(OBJ_DEBRIS,0,parent->segnum,&parent->pos,
 336                                 &parent->orient,Polygon_models[parent->rtype.pobj_info.model_num].submodel_rads[subobj_num],
 337                                 CT_DEBRIS,MT_PHYSICS,RT_POLYOBJ);
 338
 339         if ((objnum < 0 ) && (Highest_object_index >= MAX_OBJECTS-1)) {
 340                 mprintf((1, "Can't create object in object_create_debris.\n"));
 341                 Int3();
 342                 return NULL;
 343         }
 344         if ( objnum < 0 )
 345                 return NULL;                            // Not enough debris slots!
 346         obj = &Objects[objnum];
 347
 348         Assert(subobj_num < 32);
 349
 350         //Set polygon-object-specific data
 351
 352         obj->rtype.pobj_info.model_num = parent->rtype.pobj_info.model_num;
 353         obj->rtype.pobj_info.subobj_flags = 1<<subobj_num;
 354         obj->rtype.pobj_info.tmap_override = parent->rtype.pobj_info.tmap_override;
 355
 356         //Set physics data for this object
 357
 358         po = &Polygon_models[obj->rtype.pobj_info.model_num];
 359
 360         obj->mtype.phys_info.velocity.x = RAND_MAX/2 - d_rand();
 361         obj->mtype.phys_info.velocity.y = RAND_MAX/2 - d_rand();
 362         obj->mtype.phys_info.velocity.z = RAND_MAX/2 - d_rand();
 363         vm_vec_normalize_quick(&obj->mtype.phys_info.velocity);
 364         vm_vec_scale(&obj->mtype.phys_info.velocity,i2f(10 + (30 * d_rand() / RAND_MAX)));
 365
 366         vm_vec_add2(&obj->mtype.phys_info.velocity,&parent->mtype.phys_info.velocity);
 367
 368         // -- used to be: Notice, not random! vm_vec_make(&obj->mtype.phys_info.rotvel,10*0x2000/3,10*0x4000/3,10*0x7000/3);
 369         vm_vec_make(&obj->mtype.phys_info.rotvel, d_rand() + 0x1000, d_rand()*2 + 0x4000, d_rand()*3 + 0x2000);
 370         vm_vec_zero(&obj->mtype.phys_info.rotthrust);
 371
 372         obj->lifeleft = 3*DEBRIS_LIFE/4 + fixmul(d_rand(), DEBRIS_LIFE);        //      Some randomness, so they don't all go away at the same time.
 373
 374         obj->mtype.phys_info.mass = fixmuldiv(parent->mtype.phys_info.mass,obj->size,parent->size);
 375         obj->mtype.phys_info.drag = 0; //fl2f(0.2);             //parent->mtype.phys_info.drag;
 376
 377         return obj;
 378
 379 }
 380
 381 void draw_fireball(object *obj)
 382 {
 383         //mprintf( 0, "[Drawing obj %d type %d fireball size %x]\n", obj-Objects, obj->id, obj->size );
 384
 385         if ( obj->lifeleft > 0 )
 386                 draw_vclip_object(obj,obj->lifeleft,0, obj->id);
 387
 388 }
 389
 390 // --------------------------------------------------------------------------------------------------------------------
 391 //      Return true if there is a door here and it is openable
 392 //      It is assumed that the player has all keys.
 393 int door_is_openable_by_player(segment *segp, int sidenum)
 394 {
 395         int     wall_num, wall_type;
 396
 397         wall_num = segp->sides[sidenum].wall_num;
 398         wall_type = Walls[wall_num].type;
 399
 400         if (wall_num == -1)
 401                 return 0;                                               //      no wall here.
 402
 403         //      Can't open locked doors.
 404         if (((wall_type == WALL_DOOR) && (Walls[wall_num].flags & WALL_DOOR_LOCKED)) || (wall_type == WALL_CLOSED))
 405                 return 0;
 406
 407         return 1;
 408
 409 }
 410
 411 #define QUEUE_SIZE      64
 412
 413 // --------------------------------------------------------------------------------------------------------------------
 414 //      Return a segment %i segments away from initial segment.
 415 //      Returns -1 if can't find a segment that distance away.
 416 int pick_connected_segment(object *objp, int max_depth)
 417 {
 418         int             i;
 419         int             cur_depth;
 420         int             start_seg;
 421         int             head, tail;
 422         int             seg_queue[QUEUE_SIZE*2];
 423         byte            visited[MAX_SEGMENTS];
 424         byte            depth[MAX_SEGMENTS];
 425         byte            side_rand[MAX_SIDES_PER_SEGMENT];
 426
 427 //      mprintf((0, "Finding a segment %i segments away from segment %i: ", max_depth, objp->segnum));
 428
 429         start_seg = objp->segnum;
 430         head = 0;
 431         tail = 0;
 432         seg_queue[head++] = start_seg;
 433
 434         memset(visited, 0, Highest_segment_index+1);
 435         memset(depth, 0, Highest_segment_index+1);
 436         cur_depth = 0;
 437
 438         for (i=0; i<MAX_SIDES_PER_SEGMENT; i++)
 439                 side_rand[i] = i;
 440
 441         //      Now, randomize a bit to start, so we don't always get started in the same direction.
 442         for (i=0; i<4; i++) {
 443                 int     ind1, temp;
 444
 445                 ind1 = (d_rand() * MAX_SIDES_PER_SEGMENT) >> 15;
 446                 temp = side_rand[ind1];
 447                 side_rand[ind1] = side_rand[i];
 448                 side_rand[i] = temp;
 449         }
 450
 451
 452         while (tail != head) {
 453                 int             sidenum, count;
 454                 segment *segp;
 455                 int             ind1, ind2, temp;
 456
 457                 if (cur_depth >= max_depth) {
 458 //                      mprintf((0, "selected segment %i\n", seg_queue[tail]));
 459                         return seg_queue[tail];
 460                 }
 461
 462                 segp = &Segments[seg_queue[tail++]];
 463                 tail &= QUEUE_SIZE-1;
 464
 465                 //      to make random, switch a pair of entries in side_rand.
 466                 ind1 = (d_rand() * MAX_SIDES_PER_SEGMENT) >> 15;
 467                 ind2 = (d_rand() * MAX_SIDES_PER_SEGMENT) >> 15;
 468                 temp = side_rand[ind1];
 469                 side_rand[ind1] = side_rand[ind2];
 470                 side_rand[ind2] = temp;
 471
 472                 count = 0;
 473                 for (sidenum=ind1; count<MAX_SIDES_PER_SEGMENT; count++) {
 474                         int     snrand, wall_num;
 475
 476                         if (sidenum == MAX_SIDES_PER_SEGMENT)
 477                                 sidenum = 0;
 478
 479                         snrand = side_rand[sidenum];
 480                         wall_num = segp->sides[snrand].wall_num;
 481                         sidenum++;
 482
 483                         if (((wall_num == -1) && (segp->children[snrand] > -1)) || door_is_openable_by_player(segp, snrand)) {
 484                                 if (visited[segp->children[snrand]] == 0) {
 485                                         seg_queue[head++] = segp->children[snrand];
 486                                         visited[segp->children[snrand]] = 1;
 487                                         depth[segp->children[snrand]] = cur_depth+1;
 488                                         head &= QUEUE_SIZE-1;
 489                                         if (head > tail) {
 490                                                 if (head == tail + QUEUE_SIZE-1)
 491                                                         Int3(); //      queue overflow.  Make it bigger!
 492                                         } else
 493                                                 if (head+QUEUE_SIZE == tail + QUEUE_SIZE-1)
 494                                                         Int3(); //      queue overflow.  Make it bigger!
 495                                 }
 496                         }
 497                 }
 498                 if ((seg_queue[tail] < 0) || (seg_queue[tail] > Highest_segment_index)) {
 499                         // -- Int3();   //      Something bad has happened.  Queue is trashed.  --MK, 12/13/94
 500                         return -1;
 501                 }
 502                 cur_depth = depth[seg_queue[tail]];
 503         }
 504
 505         mprintf((0, "...failed at depth %i, returning -1\n", cur_depth));
 506         return -1;
 507 }
 508
 509 #ifdef NETWORK
 510 #define BASE_NET_DROP_DEPTH     8
 511
 512 //      ------------------------------------------------------------------------------------------------------
 513 //      Choose segment to drop a powerup in.
 514 //      For all active net players, try to create a N segment path from the player.  If possible, return that
 515 //      segment.  If not possible, try another player.  After a few tries, use a random segment.
 516 //      Don't drop if control center in segment.
 517 int choose_drop_segment()
 518 {
 519         int     pnum = 0;
 520         int     segnum = -1;
 521         int     cur_drop_depth;
 522         int     count;
 523         int     player_seg;
 524         vms_vector tempv,*player_pos;
 525
 526         mprintf((0,"choose_drop_segment:"));
 527
 528         d_srand(timer_get_fixed_seconds());
 529
 530         cur_drop_depth = BASE_NET_DROP_DEPTH + ((d_rand() * BASE_NET_DROP_DEPTH*2) >> 15);
 531
 532         player_pos = &Objects[Players[Player_num].objnum].pos;
 533         player_seg = Objects[Players[Player_num].objnum].segnum;
 534
 535         while ((segnum == -1) && (cur_drop_depth > BASE_NET_DROP_DEPTH/2)) {
 536                 pnum = (d_rand() * N_players) >> 15;
 537                 count = 0;
 538                 while ((count < N_players) && ((Players[pnum].connected == 0) || (pnum==Player_num) || ((Game_mode & (GM_TEAM|GM_CAPTURE)) && (get_team(pnum)==get_team(Player_num))))) {
 539                         pnum = (pnum+1)%N_players;
 540                         count++;
 541                 }
 542
 543                 if (count == N_players) {
 544                         //if can't valid non-player person, use the player
 545                         pnum = Player_num;
 546
 547                         //mprintf((1, "Warning: choose_drop_segment: Couldn't find legal drop segment because no connected players.\n"));
 548                         //return (d_rand() * Highest_segment_index) >> 15;
 549                 }
 550
 551                 segnum = pick_connected_segment(&Objects[Players[pnum].objnum], cur_drop_depth);
 552                 mprintf((0," %d",segnum));
 553                 if (segnum == -1)
 554                 {
 555                         cur_drop_depth--;
 556                         continue;
 557                 }
 558                 if (Segment2s[segnum].special == SEGMENT_IS_CONTROLCEN)
 559                         {segnum = -1; mprintf((0,"C")); }
 560                 else {  //don't drop in any children of control centers
 561                         int i;
 562                         for (i=0;i<6;i++) {
 563                                 int ch = Segments[segnum].children[i];
 564                                 if (IS_CHILD(ch) && Segment2s[ch].special == SEGMENT_IS_CONTROLCEN) {
 565                                         mprintf((0,"c"));
 566                                         segnum = -1;
 567                                         break;
 568                                 }
 569                         }
 570                 }
 571
 572                 //bail if not far enough from original position
 573                 if (segnum != -1) {
 574                         compute_segment_center(&tempv, &Segments[segnum]);
 575                         if (find_connected_distance(player_pos,player_seg,&tempv,segnum,-1,WID_FLY_FLAG) < i2f(20)*cur_drop_depth) {
 576                                 mprintf((0,"D"));
 577                                 segnum = -1;
 578                         }
 579                 }
 580
 581                 cur_drop_depth--;
 582         }
 583
 584         if (segnum != -1)
 585                 mprintf((0," dist=%x\n",find_connected_distance(player_pos,player_seg,&tempv,segnum,-1,WID_FLY_FLAG)));
 586
 587         if (segnum == -1) {
 588                 mprintf((1, "Warning: Unable to find a connected segment.  Picking a random one.\n"));
 589                 return (d_rand() * Highest_segment_index) >> 15;
 590         } else
 591                 return segnum;
 592
 593 }
 594
 595 #endif // NETWORK
 596 #ifdef NETWORK
 597 //      ------------------------------------------------------------------------------------------------------
 598 //      Drop cloak powerup if in a network game.
 599
 600 extern char PowerupsInMine[],MaxPowerupsAllowed[];
 601
 602 void maybe_drop_net_powerup(int powerup_type)
 603 {
 604         if ((Game_mode & GM_MULTI) && !(Game_mode & GM_MULTI_COOP)) {
 605                 int     segnum, objnum;
 606                 vms_vector      new_pos;
 607
 608                 if (Game_mode & GM_NETWORK)
 609                         {
 610                                 if (PowerupsInMine[powerup_type]>=MaxPowerupsAllowed[powerup_type])
 611                                         return;
 612                         }
 613
 614
 615                 if (Control_center_destroyed || Endlevel_sequence)
 616                         return;
 617
 618                 segnum = choose_drop_segment();
 619 //--old--               segnum = (d_rand() * Highest_segment_index) >> 15;
 620 //--old--               Assert((segnum >= 0) && (segnum <= Highest_segment_index));
 621 //--old--               if (segnum < 0)
 622 //--old--                       segnum = -segnum;
 623 //--old--               while (segnum > Highest_segment_index)
 624 //--old--                       segnum /= 2;
 625
 626                 Net_create_loc = 0;
 627                 objnum = call_object_create_egg(&Objects[Players[Player_num].objnum], 1, OBJ_POWERUP, powerup_type);
 628
 629                 if (objnum < 0)
 630                         return;
 631
 632                 pick_random_point_in_seg(&new_pos, segnum);
 633
 634                 multi_send_create_powerup(powerup_type, segnum, objnum, &new_pos);
 635
 636                 Objects[objnum].pos = new_pos;
 637                 vm_vec_zero(&Objects[objnum].mtype.phys_info.velocity);
 638                 obj_relink(objnum, segnum);
 639
 640                 object_create_explosion(segnum, &new_pos, i2f(5), VCLIP_POWERUP_DISAPPEARANCE );
 641 //              mprintf(0, "Creating net powerup in segment %i at %7.3f %7.3f %7.3f\n", segnum, f2fl(new_pos.x), f2fl(new_pos.y), f2fl(new_pos.z));
 642         }
 643 }
 644 #endif
 645
 646 //      ------------------------------------------------------------------------------------------------------
 647 //      Return true if current segment contains some object.
 648 int segment_contains_object(int obj_type, int obj_id, int segnum)
 649 {
 650         int     objnum;
 651
 652         if (segnum == -1)
 653                 return 0;
 654
 655         objnum = Segments[segnum].objects;
 656
 657         while (objnum != -1)
 658                 if ((Objects[objnum].type == obj_type) && (Objects[objnum].id == obj_id))
 659                         return 1;
 660                 else
 661                         objnum = Objects[objnum].next;
 662
 663         return 0;
 664 }
 665
 666 //      ------------------------------------------------------------------------------------------------------
 667 int object_nearby_aux(int segnum, int object_type, int object_id, int depth)
 668 {
 669         int     i;
 670
 671         if (depth == 0)
 672                 return 0;
 673
 674         if (segment_contains_object(object_type, object_id, segnum))
 675                 return 1;
 676
 677         for (i=0; i<MAX_SIDES_PER_SEGMENT; i++) {
 678                 int     seg2 = Segments[segnum].children[i];
 679
 680                 if (seg2 != -1)
 681                         if (object_nearby_aux(seg2, object_type, object_id, depth-1))
 682                                 return 1;
 683         }
 684
 685         return 0;
 686 }
 687
 688
 689 //      ------------------------------------------------------------------------------------------------------
 690 //      Return true if some powerup is nearby (within 3 segments).
 691 int weapon_nearby(object *objp, int weapon_id)
 692 {
 693         return object_nearby_aux(objp->segnum, OBJ_POWERUP, weapon_id, 3);
 694 }
 695
 696 //      ------------------------------------------------------------------------------------------------------
 697 void maybe_replace_powerup_with_energy(object *del_obj)
 698 {
 699         int     weapon_index=-1;
 700
 701         if (del_obj->contains_type != OBJ_POWERUP)
 702                 return;
 703
 704         if (del_obj->contains_id == POW_CLOAK) {
 705                 if (weapon_nearby(del_obj, del_obj->contains_id)) {
 706                         mprintf((0, "Bashing cloak into nothing because there's one nearby.\n"));
 707                         del_obj->contains_count = 0;
 708                 }
 709                 return;
 710         }
 711         switch (del_obj->contains_id) {
 712                 case POW_VULCAN_WEAPON:                 weapon_index = VULCAN_INDEX;            break;
 713                 case POW_GAUSS_WEAPON:                  weapon_index = GAUSS_INDEX;             break;
 714                 case POW_SPREADFIRE_WEAPON:     weapon_index = SPREADFIRE_INDEX;        break;
 715                 case POW_PLASMA_WEAPON:                 weapon_index = PLASMA_INDEX;            break;
 716                 case POW_FUSION_WEAPON:                 weapon_index = FUSION_INDEX;            break;
 717
 718                 case POW_HELIX_WEAPON:                  weapon_index = HELIX_INDEX;             break;
 719                 case POW_PHOENIX_WEAPON:                weapon_index = PHOENIX_INDEX;           break;
 720                 case POW_OMEGA_WEAPON:                  weapon_index = OMEGA_INDEX;             break;
 721
 722         }
 723
 724         //      Don't drop vulcan ammo if player maxed out.
 725         if (((weapon_index == VULCAN_INDEX) || (del_obj->contains_id == POW_VULCAN_AMMO)) && (Players[Player_num].primary_ammo[VULCAN_INDEX] >= VULCAN_AMMO_MAX))
 726                 del_obj->contains_count = 0;
 727         else if (((weapon_index == GAUSS_INDEX) || (del_obj->contains_id == POW_VULCAN_AMMO)) && (Players[Player_num].primary_ammo[VULCAN_INDEX] >= VULCAN_AMMO_MAX))
 728                 del_obj->contains_count = 0;
 729         else if (weapon_index != -1) {
 730                 if ((player_has_weapon(weapon_index, 0) & HAS_WEAPON_FLAG) || weapon_nearby(del_obj, del_obj->contains_id)) {
 731                         if (d_rand() > 16384) {
 732                                 del_obj->contains_type = OBJ_POWERUP;
 733                                 if (weapon_index == VULCAN_INDEX) {
 734                                         del_obj->contains_id = POW_VULCAN_AMMO;
 735                                 } else if (weapon_index == GAUSS_INDEX) {
 736                                         del_obj->contains_id = POW_VULCAN_AMMO;
 737                                 } else {
 738                                         del_obj->contains_id = POW_ENERGY;
 739                                 }
 740                         } else {
 741                                 del_obj->contains_type = OBJ_POWERUP;
 742                                 del_obj->contains_id = POW_SHIELD_BOOST;
 743                         }
 744                 }
 745         } else if (del_obj->contains_id == POW_QUAD_FIRE)
 746                 if ((Players[Player_num].flags & PLAYER_FLAGS_QUAD_LASERS) || weapon_nearby(del_obj, del_obj->contains_id)) {
 747                         if (d_rand() > 16384) {
 748                                 del_obj->contains_type = OBJ_POWERUP;
 749                                 del_obj->contains_id = POW_ENERGY;
 750                         } else {
 751                                 del_obj->contains_type = OBJ_POWERUP;
 752                                 del_obj->contains_id = POW_SHIELD_BOOST;
 753                         }
 754                 }
 755
 756         //      If this robot was gated in by the boss and it now contains energy, make it contain nothing,
 757         //      else the room gets full of energy.
 758         if ( (del_obj->matcen_creator == BOSS_GATE_MATCEN_NUM) && (del_obj->contains_id == POW_ENERGY) && (del_obj->contains_type == OBJ_POWERUP) ) {
 759                 mprintf((0, "Converting energy powerup to nothing because robot %i gated in by boss.\n", del_obj-Objects));
 760                 del_obj->contains_count = 0;
 761         }
 762
 763         // Change multiplayer extra-lives into invulnerability
 764         if ((Game_mode & GM_MULTI) && (del_obj->contains_id == POW_EXTRA_LIFE))
 765         {
 766                 del_obj->contains_id = POW_INVULNERABILITY;
 767         }
 768 }
 769
 770 int drop_powerup(int type, int id, int num, vms_vector *init_vel, vms_vector *pos, int segnum)
 771 {
 772         int             objnum=-1;
 773         object  *obj;
 774         vms_vector      new_velocity, new_pos;
 775         fix             old_mag;
 776    int             count;
 777
 778         switch (type) {
 779                 case OBJ_POWERUP:
 780                         for (count=0; count<num; count++) {
 781                                 int     rand_scale;
 782                                 new_velocity = *init_vel;
 783                                 old_mag = vm_vec_mag_quick(init_vel);
 784
 785                                 //      We want powerups to move more in network mode.
 786                                 if ((Game_mode & GM_MULTI) && !(Game_mode & GM_MULTI_ROBOTS)) {
 787                                         rand_scale = 4;
 788                                         //      extra life powerups are converted to invulnerability in multiplayer, for what is an extra life, anyway?
 789                                         if (id == POW_EXTRA_LIFE)
 790                                                 id = POW_INVULNERABILITY;
 791                                 } else
 792                                         rand_scale = 2;
 793
 794                                 new_velocity.x += fixmul(old_mag+F1_0*32, d_rand()*rand_scale - 16384*rand_scale);
 795                                 new_velocity.y += fixmul(old_mag+F1_0*32, d_rand()*rand_scale - 16384*rand_scale);
 796                                 new_velocity.z += fixmul(old_mag+F1_0*32, d_rand()*rand_scale - 16384*rand_scale);
 797
 798                                 // Give keys zero velocity so they can be tracked better in multi
 799
 800                                 if ((Game_mode & GM_MULTI) && (id >= POW_KEY_BLUE) && (id <= POW_KEY_GOLD))
 801                                         vm_vec_zero(&new_velocity);
 802
 803                                 new_pos = *pos;
 804 //                              new_pos.x += (d_rand()-16384)*8;
 805 //                              new_pos.y += (d_rand()-16384)*8;
 806 //                              new_pos.z += (d_rand()-16384)*8;
 807
 808 #ifdef NETWORK
 809                                 if (Game_mode & GM_MULTI)
 810                                 {
 811                                         if (Net_create_loc >= MAX_NET_CREATE_OBJECTS)
 812                                         {
 813                                                 mprintf( (1, "Not enough slots to drop all powerups!\n" ));
 814                                                 return (-1);
 815                                         }
 816                                         if ((Game_mode & GM_NETWORK) && Network_status == NETSTAT_ENDLEVEL)
 817                                          return (-1);
 818                                 }
 819 #endif
 820                                 objnum = obj_create( type, id, segnum, &new_pos, &vmd_identity_matrix, Powerup_info[id].size, CT_POWERUP, MT_PHYSICS, RT_POWERUP);
 821
 822                                 if (objnum < 0 ) {
 823                                         mprintf((1, "Can't create object in object_create_egg.  Aborting.\n"));
 824                                         Int3();
 825                                         return objnum;
 826                                 }
 827
 828 #ifdef NETWORK
 829                                 if (Game_mode & GM_MULTI)
 830                                 {
 831                                         Net_create_objnums[Net_create_loc++] = objnum;
 832                                 }
 833 #endif
 834
 835                                 obj = &Objects[objnum];
 836
 837                                 obj->mtype.phys_info.velocity = new_velocity;
 838
 839 //                              mprintf(0, "Created powerup, object #%i, velocity = %7.3f %7.3f %7.3f\n", objnum, f2fl(new_velocity.x), f2fl(new_velocity.y), f2fl(new_velocity.z));
 840 //                              mprintf(0, "                             pos = x=%d y=%d z=%d\n", obj->pos.x, obj->pos.y, obj->pos.z);
 841
 842                                 obj->mtype.phys_info.drag = 512;        //1024;
 843                                 obj->mtype.phys_info.mass = F1_0;
 844
 845                                 obj->mtype.phys_info.flags = PF_BOUNCE;
 846
 847                                 obj->rtype.vclip_info.vclip_num = Powerup_info[obj->id].vclip_num;
 848                                 obj->rtype.vclip_info.frametime = Vclip[obj->rtype.vclip_info.vclip_num].frame_time;
 849                                 obj->rtype.vclip_info.framenum = 0;
 850
 851                                 switch (obj->id) {
 852                                         case POW_MISSILE_1:
 853                                         case POW_MISSILE_4:
 854                                         case POW_SHIELD_BOOST:
 855                                         case POW_ENERGY:
 856                                                 obj->lifeleft = (d_rand() + F1_0*3) * 64;               //      Lives for 3 to 3.5 binary minutes (a binary minute is 64 seconds)
 857                                                 if (Game_mode & GM_MULTI)
 858                                                         obj->lifeleft /= 2;
 859                                                 break;
 860                                         default:
 861 //                                              if (Game_mode & GM_MULTI)
 862 //                                                      obj->lifeleft = (d_rand() + F1_0*3) * 64;               //      Lives for 5 to 5.5 binary minutes (a binary minute is 64 seconds)
 863                                                 break;
 864                                 }
 865                         }
 866                         break;
 867
 868                 case OBJ_ROBOT:
 869                         for (count=0; count<num; count++) {
 870                                 int     rand_scale;
 871                                 new_velocity = *init_vel;
 872                                 old_mag = vm_vec_mag_quick(init_vel);
 873
 874                                 vm_vec_normalize_quick(&new_velocity);
 875
 876                                 //      We want powerups to move more in network mode.
 877 //                              if (Game_mode & GM_MULTI)
 878 //                                      rand_scale = 4;
 879 //                              else
 880                                         rand_scale = 2;
 881
 882                                 new_velocity.x += (d_rand()-16384)*2;
 883                                 new_velocity.y += (d_rand()-16384)*2;
 884                                 new_velocity.z += (d_rand()-16384)*2;
 885
 886                                 vm_vec_normalize_quick(&new_velocity);
 887                                 vm_vec_scale(&new_velocity, (F1_0*32 + old_mag) * rand_scale);
 888                                 new_pos = *pos;
 889                                 //      This is dangerous, could be outside mine.
 890 //                              new_pos.x += (d_rand()-16384)*8;
 891 //                              new_pos.y += (d_rand()-16384)*7;
 892 //                              new_pos.z += (d_rand()-16384)*6;
 893
 894                                 objnum = obj_create(OBJ_ROBOT, id, segnum, &new_pos, &vmd_identity_matrix, Polygon_models[Robot_info[id].model_num].rad, CT_AI, MT_PHYSICS, RT_POLYOBJ);
 895
 896                                 if ( objnum < 0 ) {
 897                                         mprintf((1, "Can't create object in object_create_egg, robots.  Aborting.\n"));
 898                                         Int3();
 899                                         return objnum;
 900                                 }
 901
 902                                 #ifdef NETWORK
 903                                 if (Game_mode & GM_MULTI)
 904                                 {
 905                                         Net_create_objnums[Net_create_loc++] = objnum;
 906                                 }
 907                                 #endif
 908
 909                                 obj = &Objects[objnum];
 910
 911                                 //@@Took out this ugly hack 1/12/96, because Mike has added code
 912                                 //@@that should fix it in a better way.
 913                                 //@@//this is a super-ugly hack.  Since the baby stripe robots have
 914                                 //@@//their firing point on their bounding sphere, the firing points
 915                                 //@@//can poke through a wall if the robots are very close to it. So
 916                                 //@@//we make their radii bigger so the guns can't get too close to
 917                                 //@@//the walls
 918                                 //@@if (Robot_info[obj->id].flags & RIF_BIG_RADIUS)
 919                                 //@@    obj->size = (obj->size*3)/2;
 920
 921                                 //Set polygon-object-specific data
 922
 923                                 obj->rtype.pobj_info.model_num = Robot_info[obj->id].model_num;
 924                                 obj->rtype.pobj_info.subobj_flags = 0;
 925
 926                                 //set Physics info
 927
 928                                 obj->mtype.phys_info.velocity = new_velocity;
 929
 930                                 obj->mtype.phys_info.mass = Robot_info[obj->id].mass;
 931                                 obj->mtype.phys_info.drag = Robot_info[obj->id].drag;
 932
 933                                 obj->mtype.phys_info.flags |= (PF_LEVELLING);
 934
 935                                 obj->shields = Robot_info[obj->id].strength;
 936
 937                                 obj->ctype.ai_info.behavior = AIB_NORMAL;
 938                                 Ai_local_info[obj-Objects].player_awareness_type = PA_WEAPON_ROBOT_COLLISION;
 939                                 Ai_local_info[obj-Objects].player_awareness_time = F1_0*3;
 940                                 obj->ctype.ai_info.CURRENT_STATE = AIS_LOCK;
 941                                 obj->ctype.ai_info.GOAL_STATE = AIS_LOCK;
 942                                 obj->ctype.ai_info.REMOTE_OWNER = -1;
 943                         }
 944
 945                         //      At JasenW's request, robots which contain robots sometimes drop shields.
 946                         if (d_rand() > 16384)
 947                                 drop_powerup(OBJ_POWERUP, POW_SHIELD_BOOST, 1, init_vel, pos, segnum);
 948
 949                         break;
 950
 951                 default:
 952                         Error("Error: Illegal type (%i) in object spawning.\n", type);
 953         }
 954
 955         return objnum;
 956 }
 957
 958 //      ------------------------------------------------------------------------------------------------------
 959 //      Returns created object number.
 960 //      If object dropped by player, set flag.
 961 int object_create_egg(object *objp)
 962 {
 963         int     rval;
 964
 965         if (!(Game_mode & GM_MULTI) & (objp->type != OBJ_PLAYER))
 966         {
 967                 if (objp->contains_type == OBJ_POWERUP)
 968                 {
 969                         if (objp->contains_id == POW_SHIELD_BOOST) {
 970                                 if (Players[Player_num].shields >= i2f(100)) {
 971                                         if (d_rand() > 16384) {
 972                                                 mprintf((0, "Not dropping shield!\n"));
 973                                                 return -1;
 974                                         }
 975                                 } else  if (Players[Player_num].shields >= i2f(150)) {
 976                                         if (d_rand() > 8192) {
 977                                                 mprintf((0, "Not dropping shield!\n"));
 978                                                 return -1;
 979                                         }
 980                                 }
 981                         } else if (objp->contains_id == POW_ENERGY) {
 982                                 if (Players[Player_num].energy >= i2f(100)) {
 983                                         if (d_rand() > 16384) {
 984                                                 mprintf((0, "Not dropping energy!\n"));
 985                                                 return -1;
 986                                         }
 987                                 } else  if (Players[Player_num].energy >= i2f(150)) {
 988                                         if (d_rand() > 8192) {
 989                                                 mprintf((0, "Not dropping energy!\n"));
 990                                                 return -1;
 991                                         }
 992                                 }
 993                         }
 994                 }
 995         }
 996
 997         rval = drop_powerup(objp->contains_type, objp->contains_id, objp->contains_count, &objp->mtype.phys_info.velocity, &objp->pos, objp->segnum);
 998
 999         if (rval != -1)
1000     {
1001                 if ((objp->type == OBJ_PLAYER) && (objp->id == Player_num))
1002                         Objects[rval].flags |= OF_PLAYER_DROPPED;
1003
1004         if (objp->type == OBJ_ROBOT && objp->contains_type==OBJ_POWERUP)
1005         {
1006                         if (objp->contains_id==POW_VULCAN_WEAPON || objp->contains_id==POW_GAUSS_WEAPON)
1007                                 Objects[rval].ctype.powerup_info.count = VULCAN_WEAPON_AMMO_AMOUNT;
1008                         else if (objp->contains_id==POW_OMEGA_WEAPON)
1009                                 Objects[rval].ctype.powerup_info.count = MAX_OMEGA_CHARGE;
1010         }
1011     }
1012
1013         return rval;
1014 }
1015
1016 // -- extern int Items_destroyed;
1017
1018 //      -------------------------------------------------------------------------------------------------------
1019 //      Put count objects of type type (eg, powerup), id = id (eg, energy) into *objp, then drop them!  Yippee!
1020 //      Returns created object number.
1021 int call_object_create_egg(object *objp, int count, int type, int id)
1022 {
1023 // --   if (!(Game_mode & GM_MULTI) && (objp == ConsoleObject))
1024 // --           if (d_rand() < 32767/6) {
1025 // --                   Items_destroyed++;
1026 // --                   return -1;
1027 // --           }
1028
1029         if (count > 0) {
1030                 objp->contains_count = count;
1031                 objp->contains_type = type;
1032                 objp->contains_id = id;
1033                 return object_create_egg(objp);
1034         }
1035
1036         return -1;
1037 }
1038
1039 //what vclip does this explode with?
1040 int get_explosion_vclip(object *obj,int stage)
1041 {
1042         if (obj->type==OBJ_ROBOT) {
1043
1044                 if (stage==0 && Robot_info[obj->id].exp1_vclip_num>-1)
1045                                 return Robot_info[obj->id].exp1_vclip_num;
1046                 else if (stage==1 && Robot_info[obj->id].exp2_vclip_num>-1)
1047                                 return Robot_info[obj->id].exp2_vclip_num;
1048
1049         }
1050         else if (obj->type==OBJ_PLAYER && Player_ship->expl_vclip_num>-1)
1051                         return Player_ship->expl_vclip_num;
1052
1053         return VCLIP_SMALL_EXPLOSION;           //default
1054 }
1055
1056 //blow up a polygon model
1057 void explode_model(object *obj)
1058 {
1059         Assert(obj->render_type == RT_POLYOBJ);
1060
1061         if (Dying_modelnums[obj->rtype.pobj_info.model_num] != -1)
1062                 obj->rtype.pobj_info.model_num = Dying_modelnums[obj->rtype.pobj_info.model_num];
1063
1064         if (Polygon_models[obj->rtype.pobj_info.model_num].n_models > 1) {
1065                 int i;
1066
1067                 for (i=1;i<Polygon_models[obj->rtype.pobj_info.model_num].n_models;i++)
1068                         if (!(obj->type == OBJ_ROBOT && obj->id == 44 && i == 5))       //energy sucker energy part
1069                                 object_create_debris(obj,i);
1070
1071                 //make parent object only draw center part
1072                 obj->rtype.pobj_info.subobj_flags=1;
1073         }
1074 }
1075
1076 //if the object has a destroyed model, switch to it.  Otherwise, delete it.
1077 void maybe_delete_object(object *del_obj)
1078 {
1079         if (Dead_modelnums[del_obj->rtype.pobj_info.model_num] != -1) {
1080                 del_obj->rtype.pobj_info.model_num = Dead_modelnums[del_obj->rtype.pobj_info.model_num];
1081                 del_obj->flags |= OF_DESTROYED;
1082         }
1083         else {          //normal, multi-stage explosion
1084                 if (del_obj->type == OBJ_PLAYER)
1085                         del_obj->render_type = RT_NONE;
1086                 else
1087                         del_obj->flags |= OF_SHOULD_BE_DEAD;
1088         }
1089 }
1090
1091 //      -------------------------------------------------------------------------------------------------------
1092 //blow up an object.  Takes the object to destroy, and the point of impact
1093 void explode_object(object *hitobj,fix delay_time)
1094 {
1095         if (hitobj->flags & OF_EXPLODING) return;
1096
1097         if (delay_time) {               //wait a little while before creating explosion
1098                 int objnum;
1099                 object *obj;
1100
1101                 //create a placeholder object to do the delay, with id==-1
1102
1103                 objnum = obj_create( OBJ_FIREBALL,-1,hitobj->segnum,&hitobj->pos,&vmd_identity_matrix,0,
1104                                                 CT_EXPLOSION,MT_NONE,RT_NONE);
1105
1106                 if (objnum < 0 ) {
1107                         maybe_delete_object(hitobj);            //no explosion, die instantly
1108                         mprintf((1,"Couldn't start explosion, deleting object now\n"));
1109                         Int3();
1110                         return;
1111                 }
1112
1113                 obj = &Objects[objnum];
1114
1115                 //now set explosion-specific data
1116
1117                 obj->lifeleft = delay_time;
1118                 obj->ctype.expl_info.delete_objnum = hitobj-Objects;
1119 #ifndef NDEBUG
1120                 if (obj->ctype.expl_info.delete_objnum < 0)
1121                  Int3(); // See Rob!
1122 #endif
1123                 obj->ctype.expl_info.delete_time = -1;
1124                 obj->ctype.expl_info.spawn_time = 0;
1125
1126         }
1127         else {
1128                 object *expl_obj;
1129                 int vclip_num;
1130
1131                 vclip_num = get_explosion_vclip(hitobj,0);
1132
1133                 expl_obj = object_create_explosion(hitobj->segnum, &hitobj->pos, fixmul(hitobj->size,EXPLOSION_SCALE), vclip_num );
1134
1135                 if (! expl_obj) {
1136                         maybe_delete_object(hitobj);            //no explosion, die instantly
1137                         mprintf((0,"Couldn't start explosion, deleting object now\n"));
1138                         return;
1139                 }
1140
1141                 //don't make debris explosions have physics, because they often
1142                 //happen when the debris has hit the wall, so the fireball is trying
1143                 //to move into the wall, which shows off FVI problems.
1144                 if (hitobj->type!=OBJ_DEBRIS && hitobj->movement_type==MT_PHYSICS) {
1145                         expl_obj->movement_type = MT_PHYSICS;
1146                         expl_obj->mtype.phys_info = hitobj->mtype.phys_info;
1147                 }
1148
1149                 if (hitobj->render_type==RT_POLYOBJ && hitobj->type!=OBJ_DEBRIS)
1150                         explode_model(hitobj);
1151
1152                 maybe_delete_object(hitobj);
1153         }
1154
1155         hitobj->flags |= OF_EXPLODING;          //say that this is blowing up
1156         hitobj->control_type = CT_NONE;         //become inert while exploding
1157
1158 }
1159
1160
1161 //do whatever needs to be done for this piece of debris for this frame
1162 void do_debris_frame(object *obj)
1163 {
1164         Assert(obj->control_type == CT_DEBRIS);
1165
1166         if (obj->lifeleft < 0)
1167                 explode_object(obj,0);
1168
1169 }
1170
1171 extern void drop_stolen_items(object *objp);
1172
1173 //do whatever needs to be done for this explosion for this frame
1174 void do_explosion_sequence(object *obj)
1175 {
1176         Assert(obj->control_type == CT_EXPLOSION);
1177
1178         //mprintf( 0, "Object %d life left is %d\n", obj-Objects, obj->lifeleft );
1179
1180         //See if we should die of old age
1181         if (obj->lifeleft <= 0 )        {       // We died of old age
1182                 obj->flags |= OF_SHOULD_BE_DEAD;
1183                 obj->lifeleft = 0;
1184         }
1185
1186         //See if we should create a secondary explosion
1187         if (obj->lifeleft <= obj->ctype.expl_info.spawn_time) {
1188                 object *expl_obj,*del_obj;
1189                 int vclip_num;
1190                 vms_vector *spawn_pos;
1191
1192                 if ((obj->ctype.expl_info.delete_objnum < 0) || (obj->ctype.expl_info.delete_objnum > Highest_object_index)) {
1193                         mprintf((0, "Illegal value for delete_objnum in fireball.c\n"));
1194                         Int3(); // get Rob, please... thanks
1195                         return;
1196                 }
1197
1198                 del_obj = &Objects[obj->ctype.expl_info.delete_objnum];
1199
1200                 spawn_pos = &del_obj->pos;
1201
1202                 if (!((del_obj->type==OBJ_ROBOT || del_obj->type==OBJ_CLUTTER || del_obj->type==OBJ_CNTRLCEN || del_obj->type == OBJ_PLAYER) && (del_obj->segnum != -1))) {
1203                         Int3(); //pretty bad
1204                         return;
1205                 }
1206
1207                 vclip_num = get_explosion_vclip(del_obj,1);
1208
1209                 if (del_obj->type == OBJ_ROBOT && Robot_info[del_obj->id].badass)
1210                         expl_obj = object_create_badass_explosion( NULL, del_obj->segnum, spawn_pos, fixmul(del_obj->size, EXPLOSION_SCALE), vclip_num, F1_0*Robot_info[del_obj->id].badass, i2f(4)*Robot_info[del_obj->id].badass, i2f(35)*Robot_info[del_obj->id].badass, -1 );
1211                 else
1212                         expl_obj = object_create_explosion( del_obj->segnum, spawn_pos, fixmul(del_obj->size, EXPLOSION_SCALE), vclip_num );
1213
1214                 if ((del_obj->contains_count > 0) && !(Game_mode & GM_MULTI)) { // Multiplayer handled outside of this code!!
1215                         //      If dropping a weapon that the player has, drop energy instead, unless it's vulcan, in which case drop vulcan ammo.
1216                         if (del_obj->contains_type == OBJ_POWERUP)
1217                                 maybe_replace_powerup_with_energy(del_obj);
1218                         object_create_egg(del_obj);
1219                 } else if ((del_obj->type == OBJ_ROBOT) && !(Game_mode & GM_MULTI)) { // Multiplayer handled outside this code!!
1220                         robot_info      *robptr = &Robot_info[del_obj->id];
1221                         if (robptr->contains_count) {
1222                                 if (((d_rand() * 16) >> 15) < robptr->contains_prob) {
1223                                         del_obj->contains_count = ((d_rand() * robptr->contains_count) >> 15) + 1;
1224                                         del_obj->contains_type = robptr->contains_type;
1225                                         del_obj->contains_id = robptr->contains_id;
1226                                         maybe_replace_powerup_with_energy(del_obj);
1227                                         object_create_egg(del_obj);
1228                                 }
1229                         }
1230
1231                         if (robptr->thief)
1232                                 drop_stolen_items(del_obj);
1233
1234                         if (robptr->companion) {
1235                                 DropBuddyMarker(del_obj);
1236                         }
1237                 }
1238
1239                 if ( Robot_info[del_obj->id].exp2_sound_num > -1 )
1240                         digi_link_sound_to_pos( Robot_info[del_obj->id].exp2_sound_num, del_obj->segnum, 0, spawn_pos, 0, F1_0 );
1241                         //PLAY_SOUND_3D( Robot_info[del_obj->id].exp2_sound_num, spawn_pos, del_obj->segnum  );
1242
1243                 // mprintf( 0, "Spawned an explosion of type %d\n", Robot_info[del_obj->id].exp2_vclip_num );
1244
1245                 //mprintf( 0, "Object %d spawned.\n", obj-Objects );
1246                 //mprintf( 0, "Explosion at %d,%d,%d\n", obj->pos.x, obj->pos.y, obj->pos.z );
1247                 //mprintf( 0, "Explosion at %d,%d,%d\n", obj->pos.x, obj->pos.y, obj->pos.z );
1248                 //mprintf( 0, "Spawned exp at %d,%d,%d\n", expl_obj->pos.x, expl_obj->pos.y, expl_obj->pos.z );
1249
1250                 obj->ctype.expl_info.spawn_time = -1;
1251
1252                 //make debris
1253                 if (del_obj->render_type==RT_POLYOBJ)
1254                         explode_model(del_obj);         //explode a polygon model
1255
1256                 //set some parm in explosion
1257                 if (expl_obj) {
1258
1259                         if (del_obj->movement_type == MT_PHYSICS) {
1260                                 expl_obj->movement_type = MT_PHYSICS;
1261                                 expl_obj->mtype.phys_info = del_obj->mtype.phys_info;
1262                         }
1263
1264                         expl_obj->ctype.expl_info.delete_time = expl_obj->lifeleft/2;
1265                         expl_obj->ctype.expl_info.delete_objnum = del_obj-Objects;
1266 #ifndef NDEBUG
1267                         if (obj->ctype.expl_info.delete_objnum < 0)
1268                                 Int3(); // See Rob!
1269 #endif
1270
1271                 }
1272                 else {
1273                         maybe_delete_object(del_obj);
1274                         mprintf((0,"Couldn't create secondary explosion, deleting object now\n"));
1275                 }
1276
1277         }
1278
1279         //See if we should delete an object
1280         if (obj->lifeleft <= obj->ctype.expl_info.delete_time) {
1281                 object *del_obj = &Objects[obj->ctype.expl_info.delete_objnum];
1282
1283                 obj->ctype.expl_info.delete_time = -1;
1284
1285                 maybe_delete_object(del_obj);
1286         }
1287 }
1288
1289 #define EXPL_WALL_TIME                                  (f1_0)
1290 #define EXPL_WALL_TOTAL_FIREBALLS       32
1291 #define EXPL_WALL_FIREBALL_SIZE                 (0x48000*6/10)  //smallest size
1292
1293 expl_wall expl_wall_list[MAX_EXPLODING_WALLS];
1294
1295 void init_exploding_walls()
1296 {
1297         int i;
1298
1299         for (i=0;i<MAX_EXPLODING_WALLS;i++)
1300                 expl_wall_list[i].segnum = -1;
1301 }
1302
1303 //explode the given wall
1304 void explode_wall(int segnum,int sidenum)
1305 {
1306         int i;
1307         vms_vector pos;
1308
1309         //find a free slot
1310
1311         for (i=0;i<MAX_EXPLODING_WALLS && expl_wall_list[i].segnum != -1;i++);
1312
1313         if (i==MAX_EXPLODING_WALLS) {           //didn't find slot.
1314                 mprintf((0,"Couldn't find free slot for exploding wall!\n"));
1315                 Int3();
1316                 return;
1317         }
1318
1319         expl_wall_list[i].segnum        = segnum;
1320         expl_wall_list[i].sidenum       = sidenum;
1321         expl_wall_list[i].time          = 0;
1322
1323         //play one long sound for whole door wall explosion
1324         compute_center_point_on_side(&pos,&Segments[segnum],sidenum);
1325         digi_link_sound_to_pos( SOUND_EXPLODING_WALL,segnum, sidenum, &pos, 0, F1_0 );
1326
1327 }
1328
1329 //handle walls for this frame
1330 //note: this wall code assumes the wall is not triangulated
1331 void do_exploding_wall_frame()
1332 {
1333         int i;
1334
1335         for (i=0;i<MAX_EXPLODING_WALLS;i++) {
1336                 int segnum = expl_wall_list[i].segnum;
1337
1338                 if (segnum != -1) {
1339                         int sidenum = expl_wall_list[i].sidenum;
1340                         fix oldfrac,newfrac;
1341                         int old_count,new_count,e;              //n,
1342
1343                         oldfrac = fixdiv(expl_wall_list[i].time,EXPL_WALL_TIME);
1344
1345                         expl_wall_list[i].time += FrameTime;
1346                         if (expl_wall_list[i].time > EXPL_WALL_TIME)
1347                                 expl_wall_list[i].time = EXPL_WALL_TIME;
1348
1349                         if (expl_wall_list[i].time>(EXPL_WALL_TIME*3)/4) {
1350                                 segment *seg,*csegp;
1351                                 int cside,a,n;
1352
1353                                 seg = &Segments[segnum];
1354
1355                                 a = Walls[seg->sides[sidenum].wall_num].clip_num;
1356                                 n = WallAnims[a].num_frames;
1357
1358                                 csegp = &Segments[seg->children[sidenum]];
1359                                 cside = find_connect_side(seg, csegp);
1360
1361                                 wall_set_tmap_num(seg,sidenum,csegp,cside,a,n-1);
1362
1363                                 Walls[seg->sides[sidenum].wall_num].flags |= WALL_BLASTED;
1364                                 Walls[csegp->sides[cside].wall_num].flags |= WALL_BLASTED;
1365
1366                         }
1367
1368                         newfrac = fixdiv(expl_wall_list[i].time,EXPL_WALL_TIME);
1369
1370                         old_count = f2i(EXPL_WALL_TOTAL_FIREBALLS * fixmul(oldfrac,oldfrac));
1371                         new_count = f2i(EXPL_WALL_TOTAL_FIREBALLS * fixmul(newfrac,newfrac));
1372
1373                         //n = new_count - old_count;
1374
1375 //                      mprintf(0,"Creating %d new explosions\n",new_count-old_count);
1376
1377                         //now create all the next explosions
1378
1379                         for (e=old_count;e<new_count;e++) {
1380                                 short                   vertnum_list[4];
1381                                 vms_vector      *v0,*v1,*v2;
1382                                 vms_vector      vv0,vv1,pos;
1383                                 fix                     size;
1384
1385                                 //calc expl position
1386
1387                                 get_side_verts(vertnum_list,segnum,sidenum);
1388
1389                                 v0 = &Vertices[vertnum_list[0]];
1390                                 v1 = &Vertices[vertnum_list[1]];
1391                                 v2 = &Vertices[vertnum_list[2]];
1392
1393                                 vm_vec_sub(&vv0,v0,v1);
1394                                 vm_vec_sub(&vv1,v2,v1);
1395
1396                                 vm_vec_scale_add(&pos,v1,&vv0,d_rand()*2);
1397                                 vm_vec_scale_add2(&pos,&vv1,d_rand()*2);
1398
1399                                 size = EXPL_WALL_FIREBALL_SIZE + (2*EXPL_WALL_FIREBALL_SIZE * e / EXPL_WALL_TOTAL_FIREBALLS);
1400
1401                                 //fireballs start away from door, with subsequent ones getting closer
1402                                 #ifdef COMPACT_SEGS
1403                                         {
1404                                         vms_vector _vn;
1405                                         get_side_normal(&Segments[segnum], sidenum, 0, &_vn );
1406                                         vm_vec_scale_add2(&pos,&_vn,size*(EXPL_WALL_TOTAL_FIREBALLS-e)/EXPL_WALL_TOTAL_FIREBALLS);
1407                                         }
1408                                 #else
1409                                         vm_vec_scale_add2(&pos,&Segments[segnum].sides[sidenum].normals[0],size*(EXPL_WALL_TOTAL_FIREBALLS-e)/EXPL_WALL_TOTAL_FIREBALLS);
1410                                 #endif
1411
1412                                 if (e & 3)              //3 of 4 are normal
1413                                         object_create_explosion(expl_wall_list[i].segnum,&pos,size,VCLIP_SMALL_EXPLOSION);
1414                                 else
1415                                         object_create_badass_explosion( NULL, expl_wall_list[i].segnum, &pos,
1416                                         size,
1417                                         VCLIP_SMALL_EXPLOSION,
1418                                         i2f(4),         // damage strength
1419                                         i2f(20),                //      damage radius
1420                                         i2f(50),                //      damage force
1421                                         -1              //      parent id
1422                                         );
1423
1424
1425                         }
1426
1427                         if (expl_wall_list[i].time >= EXPL_WALL_TIME)
1428                                 expl_wall_list[i].segnum = -1;  //flag this slot as free
1429
1430                 }
1431         }
1432
1433 }
1434
1435
1436 //creates afterburner blobs behind the specified object
1437 void drop_afterburner_blobs(object *obj, int count, fix size_scale, fix lifetime)
1438 {
1439         vms_vector pos_left,pos_right;
1440         int segnum;
1441
1442         vm_vec_scale_add(&pos_left, &obj->pos, &obj->orient.fvec, -obj->size);
1443         vm_vec_scale_add2(&pos_left, &obj->orient.rvec, -obj->size/4);
1444         vm_vec_scale_add(&pos_right, &pos_left, &obj->orient.rvec, obj->size/2);
1445
1446         if (count == 1)
1447                 vm_vec_avg(&pos_left, &pos_left, &pos_right);
1448
1449         segnum = find_point_seg(&pos_left, obj->segnum);
1450         if (segnum != -1)
1451                 object_create_explosion(segnum, &pos_left, size_scale, VCLIP_AFTERBURNER_BLOB );
1452
1453         if (count > 1) {
1454                 segnum = find_point_seg(&pos_right, obj->segnum);
1455                 if (segnum != -1) {
1456                         object  *blob_obj;
1457                         blob_obj = object_create_explosion(segnum, &pos_right, size_scale, VCLIP_AFTERBURNER_BLOB );
1458                         if (lifetime != -1)
1459                                 blob_obj->lifeleft = lifetime;
1460                 }
1461         }
1462 }
1463
1464