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