qcsrc/common/triggers/trigger/jumppads.qc

   1 // TODO: split target_push and put it in the target folder
   2 #ifdef SVQC
   3 #include "jumppads.qh"
   4 #include "../../movetypes/movetypes.qh"
   5
   6 void trigger_push_use()
   7 {SELFPARAM();
   8         if(teamplay)
   9         {
  10                 self.team = activator.team;
  11                 self.SendFlags |= 2;
  12         }
  13 }
  14 #endif
  15
  16 /*
  17         trigger_push_calculatevelocity
  18
  19         Arguments:
  20           org - origin of the object which is to be pushed
  21           tgt - target entity (can be either a point or a model entity; if it is
  22                 the latter, its midpoint is used)
  23           ht  - jump height, measured from the higher one of org and tgt's midpoint
  24
  25         Returns: velocity for the jump
  26         the global trigger_push_calculatevelocity_flighttime is set to the total
  27         jump time
  28  */
  29
  30 vector trigger_push_calculatevelocity(vector org, entity tgt, float ht)
  31 {
  32         float grav, sdist, zdist, vs, vz, jumpheight;
  33         vector sdir, torg;
  34
  35         torg = tgt.origin + (tgt.mins + tgt.maxs) * 0.5;
  36
  37         grav = PHYS_GRAVITY;
  38         if(PHYS_ENTGRAVITY(other))
  39                 grav *= PHYS_ENTGRAVITY(other);
  40
  41         zdist = torg.z - org.z;
  42         sdist = vlen(torg - org - zdist * '0 0 1');
  43         sdir = normalize(torg - org - zdist * '0 0 1');
  44
  45         // how high do we need to push the player?
  46         jumpheight = fabs(ht);
  47         if(zdist > 0)
  48                 jumpheight = jumpheight + zdist;
  49
  50         /*
  51                 STOP.
  52
  53                 You will not understand the following equations anyway...
  54                 But here is what I did to get them.
  55
  56                 I used the functions
  57
  58                   s(t) = t * vs
  59                   z(t) = t * vz - 1/2 grav t^2
  60
  61                 and solved for:
  62
  63                   s(ti) = sdist
  64                   z(ti) = zdist
  65                   max(z, ti) = jumpheight
  66
  67                 From these three equations, you will find the three parameters vs, vz
  68                 and ti.
  69          */
  70
  71         // push him so high...
  72         vz = sqrt(fabs(2 * grav * jumpheight)); // NOTE: sqrt(positive)!
  73
  74         // we start with downwards velocity only if it's a downjump and the jump apex should be outside the jump!
  75         if(ht < 0)
  76                 if(zdist < 0)
  77                         vz = -vz;
  78
  79         vector solution;
  80         solution = solve_quadratic(0.5 * grav, -vz, zdist); // equation "z(ti) = zdist"
  81         // ALWAYS solvable because jumpheight >= zdist
  82         if(!solution.z)
  83                 solution_y = solution.x; // just in case it is not solvable due to roundoff errors, assume two equal solutions at their center (this is mainly for the usual case with ht == 0)
  84         if(zdist == 0)
  85                 solution_x = solution.y; // solution_x is 0 in this case, so don't use it, but rather use solution_y (which will be sqrt(0.5 * jumpheight / grav), actually)
  86
  87         if(zdist < 0)
  88         {
  89                 // down-jump
  90                 if(ht < 0)
  91                 {
  92                         // almost straight line type
  93                         // jump apex is before the jump
  94                         // we must take the larger one
  95                         trigger_push_calculatevelocity_flighttime = solution.y;
  96                 }
  97                 else
  98                 {
  99                         // regular jump
 100                         // jump apex is during the jump
 101                         // we must take the larger one too
 102                         trigger_push_calculatevelocity_flighttime = solution.y;
 103                 }
 104         }
 105         else
 106         {
 107                 // up-jump
 108                 if(ht < 0)
 109                 {
 110                         // almost straight line type
 111                         // jump apex is after the jump
 112                         // we must take the smaller one
 113                         trigger_push_calculatevelocity_flighttime = solution.x;
 114                 }
 115                 else
 116                 {
 117                         // regular jump
 118                         // jump apex is during the jump
 119                         // we must take the larger one
 120                         trigger_push_calculatevelocity_flighttime = solution.y;
 121                 }
 122         }
 123         vs = sdist / trigger_push_calculatevelocity_flighttime;
 124
 125         // finally calculate the velocity
 126         return sdir * vs + '0 0 1' * vz;
 127 }
 128
 129 void trigger_push_touch()
 130 {SELFPARAM();
 131         if (self.active == ACTIVE_NOT)
 132                 return;
 133
 134 #ifdef SVQC
 135         if (!isPushable(other))
 136                 return;
 137 #endif
 138
 139         if(self.team)
 140                 if(((self.spawnflags & 4) == 0) == (DIFF_TEAM(self, other)))
 141                         return;
 142
 143         EXACTTRIGGER_TOUCH;
 144
 145         if(self.enemy)
 146         {
 147                 other.velocity = trigger_push_calculatevelocity(other.origin, self.enemy, self.height);
 148                 other.move_velocity = other.velocity;
 149         }
 150         else if(self.target)
 151         {
 152                 entity e;
 153                 RandomSelection_Init();
 154                 for(e = world; (e = find(e, targetname, self.target)); )
 155                 {
 156                         if(e.cnt)
 157                                 RandomSelection_Add(e, 0, string_null, e.cnt, 1);
 158                         else
 159                                 RandomSelection_Add(e, 0, string_null, 1, 1);
 160                 }
 161                 other.velocity = trigger_push_calculatevelocity(other.origin, RandomSelection_chosen_ent, self.height);
 162                 other.move_velocity = other.velocity;
 163         }
 164         else
 165         {
 166                 other.velocity = self.movedir;
 167                 other.move_velocity = other.velocity;
 168         }
 169
 170         UNSET_ONGROUND(other);
 171
 172         other.move_flags &= ~FL_ONGROUND;
 173
 174 #ifdef SVQC
 175         if (IS_PLAYER(other))
 176         {
 177                 // reset tracking of oldvelocity for impact damage (sudden velocity changes)
 178                 other.oldvelocity = other.velocity;
 179
 180                 if(self.pushltime < time)  // prevent "snorring" sound when a player hits the jumppad more than once
 181                 {
 182                         // flash when activated
 183                         Send_Effect(EFFECT_JUMPPAD, other.origin, other.velocity, 1);
 184                         _sound (other, CH_TRIGGER, self.noise, VOL_BASE, ATTEN_NORM);
 185                         self.pushltime = time + 0.2;
 186                 }
 187                 if(IS_REAL_CLIENT(other) || IS_BOT_CLIENT(other))
 188                 {
 189                         bool found = false;
 190                         for(int i = 0; i < other.jumppadcount && i < NUM_JUMPPADSUSED; ++i)
 191                                 if(other.(jumppadsused[i]) == self)
 192                                         found = true;
 193                         if(!found)
 194                         {
 195                                 other.(jumppadsused[other.jumppadcount % NUM_JUMPPADSUSED]) = self;
 196                                 other.jumppadcount = other.jumppadcount + 1;
 197                         }
 198
 199                         if(IS_REAL_CLIENT(other))
 200                         {
 201                                 if(self.message)
 202                                         centerprint(other, self.message);
 203                         }
 204                         else
 205                                 other.lastteleporttime = time;
 206
 207                         if (other.deadflag == DEAD_NO)
 208                                 animdecide_setaction(other, ANIMACTION_JUMP, true);
 209                 }
 210                 else
 211                         other.jumppadcount = true;
 212
 213                 // reset tracking of who pushed you into a hazard (for kill credit)
 214                 other.pushltime = 0;
 215                 other.istypefrag = 0;
 216         }
 217
 218         if(self.enemy.target)
 219         {
 220                 activator = other;
 221                 WITH(entity, self, self.enemy, SUB_UseTargets());
 222         }
 223
 224         if (other.flags & FL_PROJECTILE)
 225         {
 226                 other.angles = vectoangles (other.velocity);
 227                 switch(other.movetype)
 228                 {
 229                         case MOVETYPE_FLY:
 230                                 other.movetype = MOVETYPE_TOSS;
 231                                 other.gravity = 1;
 232                                 break;
 233                         case MOVETYPE_BOUNCEMISSILE:
 234                                 other.movetype = MOVETYPE_BOUNCE;
 235                                 other.gravity = 1;
 236                                 break;
 237                 }
 238                 UpdateCSQCProjectile(other);
 239         }
 240
 241         if (self.spawnflags & PUSH_ONCE)
 242         {
 243                 self.touch = func_null;
 244                 self.think = SUB_Remove;
 245                 self.nextthink = time;
 246         }
 247 #endif
 248 }
 249
 250 #ifdef SVQC
 251 void trigger_push_link();
 252 void trigger_push_updatelink();
 253 #endif
 254 void trigger_push_findtarget()
 255 {SELFPARAM();
 256         entity t;
 257         vector org;
 258
 259         // first calculate a typical start point for the jump
 260         org = (self.absmin + self.absmax) * 0.5;
 261         org_z = self.absmax.z - PL_MIN.z;
 262
 263         if (self.target)
 264         {
 265                 float n = 0;
 266                 for(t = world; (t = find(t, targetname, self.target)); )
 267                 {
 268                         ++n;
 269 #ifdef SVQC
 270                         entity e = spawn();
 271                         setorigin(e, org);
 272                         setsize(e, PL_MIN, PL_MAX);
 273                         e.velocity = trigger_push_calculatevelocity(org, t, self.height);
 274                         tracetoss(e, e);
 275                         if(e.movetype == MOVETYPE_NONE)
 276                                 waypoint_spawnforteleporter(self, trace_endpos, vlen(trace_endpos - org) / vlen(e.velocity));
 277                         remove(e);
 278 #endif
 279                 }
 280
 281                 if(!n)
 282                 {
 283                         // no dest!
 284 #ifdef SVQC
 285                         objerror ("Jumppad with nonexistant target");
 286 #endif
 287                         return;
 288                 }
 289                 else if(n == 1)
 290                 {
 291                         // exactly one dest - bots love that
 292                         self.enemy = find(world, targetname, self.target);
 293                 }
 294                 else
 295                 {
 296                         // have to use random selection every single time
 297                         self.enemy = world;
 298                 }
 299         }
 300 #ifdef SVQC
 301         else
 302         {
 303                 entity e = spawn();
 304                 setorigin(e, org);
 305                 setsize(e, PL_MIN, PL_MAX);
 306                 e.velocity = self.movedir;
 307                 tracetoss(e, e);
 308                 waypoint_spawnforteleporter(self, trace_endpos, vlen(trace_endpos - org) / vlen(e.velocity));
 309                 remove(e);
 310         }
 311
 312         trigger_push_link();
 313         defer(0.1, trigger_push_updatelink);
 314 #endif
 315 }
 316
 317 #ifdef SVQC
 318 float trigger_push_send(entity to, float sf)
 319 {SELFPARAM();
 320         WriteByte(MSG_ENTITY, ENT_CLIENT_TRIGGER_PUSH);
 321         WriteByte(MSG_ENTITY, sf);
 322
 323         if(sf & 1)
 324         {
 325                 WriteByte(MSG_ENTITY, self.team);
 326                 WriteInt24_t(MSG_ENTITY, self.spawnflags);
 327                 WriteByte(MSG_ENTITY, self.active);
 328                 WriteByte(MSG_ENTITY, self.height);
 329
 330                 trigger_common_write(true);
 331         }
 332
 333         if(sf & 2)
 334         {
 335                 WriteByte(MSG_ENTITY, self.team);
 336                 WriteByte(MSG_ENTITY, self.active);
 337         }
 338
 339         return true;
 340 }
 341
 342 void trigger_push_updatelink()
 343 {SELFPARAM();
 344         self.SendFlags |= 1;
 345 }
 346
 347 void trigger_push_link()
 348 {
 349         //Net_LinkEntity(self, false, 0, trigger_push_send);
 350 }
 351 #endif
 352 #ifdef SVQC
 353 /*
 354  * ENTITY PARAMETERS:
 355  *
 356  *   target:  target of jump
 357  *   height:  the absolute value is the height of the highest point of the jump
 358  *            trajectory above the higher one of the player and the target.
 359  *            the sign indicates whether the highest point is INSIDE (positive)
 360  *            or OUTSIDE (negative) of the jump trajectory. General rule: use
 361  *            positive values for targets mounted on the floor, and use negative
 362  *            values to target a point on the ceiling.
 363  *   movedir: if target is not set, this * speed * 10 is the velocity to be reached.
 364  */
 365 spawnfunc(trigger_push)
 366 {
 367         SetMovedir(self);
 368
 369         EXACTTRIGGER_INIT;
 370
 371         self.active = ACTIVE_ACTIVE;
 372         self.use = trigger_push_use;
 373         self.touch = trigger_push_touch;
 374
 375         // normal push setup
 376         if (!self.speed)
 377                 self.speed = 1000;
 378         self.movedir = self.movedir * self.speed * 10;
 379
 380         if (!self.noise)
 381                 self.noise = "misc/jumppad.wav";
 382         precache_sound (self.noise);
 383
 384         // this must be called to spawn the teleport waypoints for bots
 385         InitializeEntity(self, trigger_push_findtarget, INITPRIO_FINDTARGET);
 386 }
 387
 388
 389 bool target_push_send(entity this, entity to, float sf)
 390 {
 391         WriteByte(MSG_ENTITY, ENT_CLIENT_TARGET_PUSH);
 392
 393         WriteByte(MSG_ENTITY, self.cnt);
 394         WriteString(MSG_ENTITY, self.targetname);
 395         WriteCoord(MSG_ENTITY, self.origin_x);
 396         WriteCoord(MSG_ENTITY, self.origin_y);
 397         WriteCoord(MSG_ENTITY, self.origin_z);
 398
 399         return true;
 400 }
 401
 402 void target_push_link()
 403 {SELFPARAM();
 404         Net_LinkEntity(self, false, 0, target_push_send);
 405         self.SendFlags |= 1; // update
 406 }
 407
 408 spawnfunc(target_push) { target_push_link(); }
 409 spawnfunc(info_notnull) { target_push_link(); }
 410 spawnfunc(target_position) { target_push_link(); }
 411
 412 #endif
 413
 414 #ifdef CSQC
 415
 416 void ent_trigger_push()
 417 {SELFPARAM();
 418         float sf = ReadByte();
 419
 420         if(sf & 1)
 421         {
 422                 self.classname = "jumppad";
 423                 int mytm = ReadByte(); if(mytm) { self.team = mytm - 1; }
 424                 self.spawnflags = ReadInt24_t();
 425                 self.active = ReadByte();
 426                 self.height = ReadByte();
 427
 428                 trigger_common_read(true);
 429
 430                 self.entremove = trigger_remove_generic;
 431                 self.solid = SOLID_TRIGGER;
 432                 self.draw = trigger_draw_generic;
 433                 self.trigger_touch = trigger_push_touch;
 434                 self.drawmask = MASK_NORMAL;
 435                 self.move_time = time;
 436                 trigger_push_findtarget();
 437         }
 438
 439         if(sf & 2)
 440         {
 441                 self.team = ReadByte();
 442                 self.active = ReadByte();
 443         }
 444 }
 445
 446 void target_push_remove()
 447 {SELFPARAM();
 448         if(self.classname)
 449                 strunzone(self.classname);
 450         self.classname = string_null;
 451
 452         if(self.targetname)
 453                 strunzone(self.targetname);
 454         self.targetname = string_null;
 455 }
 456
 457 void ent_target_push()
 458 {SELFPARAM();
 459         self.classname = "push_target";
 460         self.cnt = ReadByte();
 461         self.targetname = strzone(ReadString());
 462         self.origin_x = ReadCoord();
 463         self.origin_y = ReadCoord();
 464         self.origin_z = ReadCoord();
 465         setorigin(self, self.origin);
 466
 467         self.drawmask = MASK_NORMAL;
 468         self.entremove = target_push_remove;
 469 }
 470 #endif