qcsrc/server/weapons/tracing.qc

   1 #include "tracing.qh"
   2
   3 #include "accuracy.qh"
   4 #include "common.qh"
   5 #include "hitplot.qh"
   6 #include "weaponsystem.qh"
   7
   8 #include "../g_damage.qh"
   9 #include "../g_subs.qh"
  10 #include "../antilag.qh"
  11
  12 #include "../../common/constants.qh"
  13 #include "../../common/util.qh"
  14
  15 #include "../../common/weapons/all.qh"
  16
  17 #include "../../lib/warpzone/common.qh"
  18
  19 // this function calculates w_shotorg and w_shotdir based on the weapon model
  20 // offset, trueaim and antilag, and won't put w_shotorg inside a wall.
  21 // make sure you call makevectors first (FIXME?)
  22 void W_SetupShot_Dir_ProjectileSize_Range(entity ent, vector s_forward, vector mi, vector ma, float antilag, float recoil, string snd, float chan, float maxdamage, float range)
  23 {
  24         float nudge = 1; // added to traceline target and subtracted from result  TOOD(divVerent): do we still need this? Doesn't the engine do this now for us?
  25         float oldsolid;
  26         vector vecs, dv;
  27         oldsolid = ent.dphitcontentsmask;
  28         if (IS_PLAYER(ent) && PS(ent).m_weapon == WEP_RIFLE)
  29                 ent.dphitcontentsmask = DPCONTENTS_BODY | DPCONTENTS_CORPSE;
  30         else
  31                 ent.dphitcontentsmask = DPCONTENTS_SOLID | DPCONTENTS_BODY | DPCONTENTS_CORPSE;
  32         if(antilag)
  33                 WarpZone_traceline_antilag(world, ent.origin + ent.view_ofs, ent.origin + ent.view_ofs + s_forward * range, MOVE_NORMAL, ent, ANTILAG_LATENCY(ent));
  34                 // passing world, because we do NOT want it to touch dphitcontentsmask
  35         else
  36                 WarpZone_TraceLine(ent.origin + ent.view_ofs, ent.origin + ent.view_ofs + s_forward * range, MOVE_NOMONSTERS, ent);
  37         ent.dphitcontentsmask = DPCONTENTS_SOLID | DPCONTENTS_BODY | DPCONTENTS_CORPSE;
  38
  39         vector vf, vr, vu;
  40         vf = v_forward;
  41         vr = v_right;
  42         vu = v_up;
  43         w_shotend = WarpZone_UnTransformOrigin(WarpZone_trace_transform, trace_endpos); // warpzone support
  44         v_forward = vf;
  45         v_right = vr;
  46         v_up = vu;
  47
  48         // un-adjust trueaim if shotend is too close
  49         if(vlen(w_shotend - (ent.origin + ent.view_ofs)) < autocvar_g_trueaim_minrange)
  50                 w_shotend = ent.origin + ent.view_ofs + s_forward * autocvar_g_trueaim_minrange;
  51
  52         // track max damage
  53         if (IS_PLAYER(ent) && accuracy_canbegooddamage(ent))
  54                 accuracy_add(ent, PS(ent).m_weapon.m_id, maxdamage, 0);
  55
  56         W_HitPlotAnalysis(ent, v_forward, v_right, v_up);
  57
  58         .entity weaponentity = weaponentities[0]; // TODO: unhardcode
  59         vector md = ent.(weaponentity).movedir;
  60         if(md.x > 0)
  61                 vecs = md;
  62         else
  63                 vecs = '0 0 0';
  64
  65         dv = v_right * -vecs.y + v_up * vecs.z;
  66         w_shotorg = ent.origin + ent.view_ofs + dv;
  67
  68         // now move the shotorg forward as much as requested if possible
  69         if(antilag)
  70         {
  71                 if(ent.antilag_debug)
  72                         tracebox_antilag(ent, w_shotorg, mi, ma, w_shotorg + v_forward * (vecs.x + nudge), MOVE_NORMAL, ent, ent.antilag_debug);
  73                 else
  74                         tracebox_antilag(ent, w_shotorg, mi, ma, w_shotorg + v_forward * (vecs.x + nudge), MOVE_NORMAL, ent, ANTILAG_LATENCY(ent));
  75         }
  76         else
  77                 tracebox(w_shotorg, mi, ma, w_shotorg + v_forward * (vecs.x + nudge), MOVE_NORMAL, ent);
  78         w_shotorg = trace_endpos - v_forward * nudge;
  79         // calculate the shotdir from the chosen shotorg
  80         w_shotdir = normalize(w_shotend - w_shotorg);
  81
  82         //vector prevdir = w_shotdir;
  83         //vector prevorg = w_shotorg;
  84         //vector prevend = w_shotend;
  85
  86         if (antilag)
  87         if (!ent.cvar_cl_noantilag)
  88         {
  89                 if (autocvar_g_antilag == 1) // switch to "ghost" if not hitting original
  90                 {
  91                         traceline(w_shotorg, w_shotorg + w_shotdir * range, MOVE_NORMAL, ent);
  92                         if (!trace_ent.takedamage)
  93                         {
  94                                 traceline_antilag_force (ent, w_shotorg, w_shotorg + w_shotdir * range, MOVE_NORMAL, ent, ANTILAG_LATENCY(ent));
  95                                 if (trace_ent.takedamage && IS_PLAYER(trace_ent))
  96                                 {
  97                                         entity e;
  98                                         e = trace_ent;
  99                                         traceline(w_shotorg, e.origin, MOVE_NORMAL, ent);
 100                                         if(trace_ent == e)
 101                                                 w_shotdir = normalize(trace_ent.origin - w_shotorg);
 102                                 }
 103                         }
 104                 }
 105                 else if(autocvar_g_antilag == 3) // client side hitscan
 106                 {
 107                         // this part MUST use prydon cursor
 108                         if (ent.cursor_trace_ent)                 // client was aiming at someone
 109                         if (ent.cursor_trace_ent != ent)         // just to make sure
 110                         if (ent.cursor_trace_ent.takedamage)      // and that person is killable
 111                         if (IS_PLAYER(ent.cursor_trace_ent)) // and actually a player
 112                         {
 113                                 // verify that the shot would miss without antilag
 114                                 // (avoids an issue where guns would always shoot at their origin)
 115                                 traceline(w_shotorg, w_shotorg + w_shotdir * range, MOVE_NORMAL, ent);
 116                                 if (!trace_ent.takedamage)
 117                                 {
 118                                         // verify that the shot would hit if altered
 119                                         traceline(w_shotorg, ent.cursor_trace_ent.origin, MOVE_NORMAL, ent);
 120                                         if (trace_ent == ent.cursor_trace_ent)
 121                                                 w_shotdir = normalize(ent.cursor_trace_ent.origin - w_shotorg);
 122                                         else
 123                                                 LOG_INFO("antilag fail\n");
 124                                 }
 125                         }
 126                 }
 127         }
 128
 129         ent.dphitcontentsmask = oldsolid; // restore solid type (generally SOLID_SLIDEBOX)
 130
 131         if (!autocvar_g_norecoil)
 132                 ent.punchangle_x = recoil * -1;
 133
 134         if (snd != "")
 135         {
 136                 _sound (ent, chan, snd, VOL_BASE, ATTN_NORM);
 137                 W_PlayStrengthSound(ent);
 138         }
 139
 140         // nudge w_shotend so a trace to w_shotend hits
 141         w_shotend = w_shotend + normalize(w_shotend - w_shotorg) * nudge;
 142         //if(w_shotend != prevend) { printf("SERVER: shotEND differs: %s - %s\n", vtos(w_shotend), vtos(prevend)); }
 143         //if(w_shotorg != prevorg) { printf("SERVER: shotORG differs: %s - %s\n", vtos(w_shotorg), vtos(prevorg)); }
 144         //if(w_shotdir != prevdir) { printf("SERVER: shotDIR differs: %s - %s\n", vtos(w_shotdir), vtos(prevdir)); }
 145 }
 146
 147 vector W_CalculateProjectileVelocity(vector pvelocity, vector mvelocity, float forceAbsolute)
 148 {
 149         vector mdirection;
 150         float mspeed;
 151         vector outvelocity;
 152
 153         mvelocity = mvelocity * W_WeaponSpeedFactor();
 154
 155         mdirection = normalize(mvelocity);
 156         mspeed = vlen(mvelocity);
 157
 158         outvelocity = get_shotvelocity(pvelocity, mdirection, mspeed, (forceAbsolute ? 0 : autocvar_g_projectiles_newton_style), autocvar_g_projectiles_newton_style_2_minfactor, autocvar_g_projectiles_newton_style_2_maxfactor);
 159
 160         return outvelocity;
 161 }
 162
 163 void W_SetupProjVelocity_Explicit(entity proj, vector dir, vector upDir, float pSpeed, float pUpSpeed, float pZSpeed, float spread, float forceAbsolute)
 164 {
 165         if(proj.owner == world)
 166                 error("Unowned missile");
 167
 168         dir = dir + upDir * (pUpSpeed / pSpeed);
 169         dir.z += pZSpeed / pSpeed;
 170         pSpeed *= vlen(dir);
 171         dir = normalize(dir);
 172
 173         #if 0
 174         if(autocvar_g_projectiles_spread_style != mspercallsstyle)
 175         {
 176                 mspercallsum = mspercallcount = 0;
 177                 mspercallsstyle = autocvar_g_projectiles_spread_style;
 178         }
 179         mspercallsum -= gettime(GETTIME_HIRES);
 180         #endif
 181
 182         dir = W_CalculateSpread(dir, spread, g_weaponspreadfactor, autocvar_g_projectiles_spread_style);
 183
 184         #if 0
 185         mspercallsum += gettime(GETTIME_HIRES);
 186         mspercallcount += 1;
 187         LOG_INFO("avg: ", ftos(mspercallcount / mspercallsum), " per sec\n");
 188         #endif
 189
 190         proj.velocity = W_CalculateProjectileVelocity(proj.owner.velocity, pSpeed * dir, forceAbsolute);
 191 }
 192
 193
 194 // ====================
 195 //  Ballistics Tracing
 196 // ====================
 197
 198 void FireRailgunBullet (vector start, vector end, float bdamage, float bforce, float mindist, float maxdist, float halflifedist, float forcehalflifedist, int deathtype)
 199 {SELFPARAM();
 200         vector hitloc, force, endpoint, dir;
 201         entity ent, endent;
 202         float endq3surfaceflags;
 203         float totaldmg;
 204         entity o;
 205
 206         float length;
 207         vector beampos;
 208         string snd;
 209         entity pseudoprojectile;
 210         float f, ffs;
 211
 212         pseudoprojectile = world;
 213
 214         dir = normalize(end - start);
 215         length = vlen(end - start);
 216         force = dir * bforce;
 217
 218         // go a little bit into the wall because we need to hit this wall later
 219         end = end + dir;
 220
 221         totaldmg = 0;
 222
 223         // trace multiple times until we hit a wall, each obstacle will be made
 224         // non-solid so we can hit the next, while doing this we spawn effects and
 225         // note down which entities were hit so we can damage them later
 226         o = self;
 227         while (1)
 228         {
 229                 if(self.antilag_debug)
 230                         WarpZone_traceline_antilag (self, start, end, false, o, self.antilag_debug);
 231                 else
 232                         WarpZone_traceline_antilag (self, start, end, false, o, ANTILAG_LATENCY(self));
 233                 if(o && WarpZone_trace_firstzone)
 234                 {
 235                         o = world;
 236                         continue;
 237                 }
 238
 239                 if(trace_ent.solid == SOLID_BSP || trace_ent.solid == SOLID_SLIDEBOX)
 240                         Damage_DamageInfo(trace_endpos, bdamage, 0, 0, force, deathtype, trace_ent.species, self);
 241
 242                 // if it is world we can't hurt it so stop now
 243                 if (trace_ent == world || trace_fraction == 1)
 244                         break;
 245
 246                 // make the entity non-solid so we can hit the next one
 247                 trace_ent.railgunhit = true;
 248                 trace_ent.railgunhitloc = end;
 249                 trace_ent.railgunhitsolidbackup = trace_ent.solid;
 250                 trace_ent.railgundistance = vlen(WarpZone_UnTransformOrigin(WarpZone_trace_transform, trace_endpos) - start);
 251                 trace_ent.railgunforce = WarpZone_TransformVelocity(WarpZone_trace_transform, force);
 252
 253                 // stop if this is a wall
 254                 if (trace_ent.solid == SOLID_BSP)
 255                         break;
 256
 257                 // make the entity non-solid
 258                 trace_ent.solid = SOLID_NOT;
 259         }
 260
 261         endpoint = trace_endpos;
 262         endent = trace_ent;
 263         endq3surfaceflags = trace_dphitq3surfaceflags;
 264
 265         // find all the entities the railgun hit and restore their solid state
 266         ent = findfloat(world, railgunhit, true);
 267         while (ent)
 268         {
 269                 // restore their solid type
 270                 ent.solid = ent.railgunhitsolidbackup;
 271                 ent = findfloat(ent, railgunhit, true);
 272         }
 273
 274         // spawn a temporary explosion entity for RadiusDamage calls
 275         //explosion = spawn();
 276
 277         // Find all non-hit players the beam passed close by
 278         if(deathtype == WEP_VAPORIZER.m_id || deathtype == WEP_VORTEX.m_id)
 279         {
 280                 FOREACH_CLIENT(IS_REAL_CLIENT(it) && it != self, LAMBDA(
 281                         if(!it.railgunhit)
 282                         if(!(IS_SPEC(it) && it.enemy == self))
 283                         {
 284                                 msg_entity = it;
 285                                 // nearest point on the beam
 286                                 beampos = start + dir * bound(0, (msg_entity.origin - start) * dir, length);
 287
 288                                 f = bound(0, 1 - vlen(beampos - msg_entity.origin) / 512, 1);
 289                                 if(f <= 0)
 290                                         continue;
 291
 292                                 snd = SND(NEXWHOOSH_RANDOM());
 293
 294                                 if(!pseudoprojectile)
 295                                         pseudoprojectile = spawn(); // we need this so the sound uses the "entchannel4" volume
 296                                 soundtoat(MSG_ONE, pseudoprojectile, beampos, CH_SHOTS, snd, VOL_BASE * f, ATTEN_NONE);
 297                         }
 298                 ));
 299
 300                 if(pseudoprojectile)
 301                         remove(pseudoprojectile);
 302         }
 303
 304         // find all the entities the railgun hit and hurt them
 305         ent = findfloat(world, railgunhit, true);
 306         while (ent)
 307         {
 308                 // get the details we need to call the damage function
 309                 hitloc = ent.railgunhitloc;
 310
 311                 f = ExponentialFalloff(mindist, maxdist, halflifedist, ent.railgundistance);
 312                 ffs = ExponentialFalloff(mindist, maxdist, forcehalflifedist, ent.railgundistance);
 313
 314                 if(accuracy_isgooddamage(self, ent))
 315                         totaldmg += bdamage * f;
 316
 317                 // apply the damage
 318                 if (ent.takedamage)
 319                         Damage (ent, self, self, bdamage * f, deathtype, hitloc, ent.railgunforce * ffs);
 320
 321                 // create a small explosion to throw gibs around (if applicable)
 322                 //setorigin (explosion, hitloc);
 323                 //RadiusDamage (explosion, self, 10, 0, 50, world, world, 300, deathtype);
 324
 325                 ent.railgunhitloc = '0 0 0';
 326                 ent.railgunhitsolidbackup = SOLID_NOT;
 327                 ent.railgunhit = false;
 328                 ent.railgundistance = 0;
 329
 330                 // advance to the next entity
 331                 ent = findfloat(ent, railgunhit, true);
 332         }
 333
 334         // calculate hits and fired shots for hitscan
 335         accuracy_add(self, PS(self).m_weapon.m_id, 0, min(bdamage, totaldmg));
 336
 337         trace_endpos = endpoint;
 338         trace_ent = endent;
 339         trace_dphitq3surfaceflags = endq3surfaceflags;
 340 }
 341
 342 void fireBullet_trace_callback(vector start, vector hit, vector end)
 343 {
 344         if(vlen(hit - start) > 16)
 345                 trailparticles(world, fireBullet_trace_callback_eff, start, hit);
 346         WarpZone_trace_forent = world;
 347         fireBullet_last_hit = world;
 348 }
 349
 350 void fireBullet(vector start, vector dir, float spread, float max_solid_penetration, float damage, float force, float dtype, int tracereffects)
 351 {SELFPARAM();
 352         vector  end;
 353
 354         dir = normalize(dir + randomvec() * spread);
 355         end = start + dir * MAX_SHOT_DISTANCE;
 356
 357         fireBullet_last_hit = world;
 358         float solid_penetration_left = 1;
 359         float total_damage = 0;
 360
 361         if(tracereffects & EF_RED)
 362                 fireBullet_trace_callback_eff = EFFECT_RIFLE;
 363         else if(tracereffects & EF_BLUE)
 364                 fireBullet_trace_callback_eff = EFFECT_RIFLE_WEAK;
 365         else
 366                 fireBullet_trace_callback_eff = EFFECT_BULLET;
 367
 368         float lag = ANTILAG_LATENCY(self);
 369         if(lag < 0.001)
 370                 lag = 0;
 371         if (!IS_REAL_CLIENT(self))
 372                 lag = 0;
 373         if(autocvar_g_antilag == 0 || self.cvar_cl_noantilag)
 374                 lag = 0; // only do hitscan, but no antilag
 375         if(lag)
 376         {
 377                 FOREACH_CLIENT(IS_PLAYER(it) && it != self, LAMBDA(antilag_takeback(it, time - lag)));
 378                 FOREACH_ENTITY_FLAGS(flags, FL_MONSTER, LAMBDA(
 379                         if(it != self)
 380                                 antilag_takeback(it, time - lag);
 381                 ));
 382         }
 383
 384         WarpZone_trace_forent = self;
 385
 386         for (;;)
 387         {
 388                 // TODO also show effect while tracing
 389                 WarpZone_TraceBox_ThroughZone(start, '0 0 0', '0 0 0', end, false, WarpZone_trace_forent, world, fireBullet_trace_callback);
 390                 dir = WarpZone_TransformVelocity(WarpZone_trace_transform, dir);
 391                 end = WarpZone_TransformOrigin(WarpZone_trace_transform, end);
 392                 start = trace_endpos;
 393                 entity hit = trace_ent;
 394
 395                 // When hitting sky, stop.
 396                 if (pointcontents(start) == CONTENT_SKY)
 397                         break;
 398
 399                 if (trace_dphitq3surfaceflags & Q3SURFACEFLAG_NOIMPACT)
 400                         break;
 401
 402                 // if we hit "weapclip", bail out
 403                 //
 404                 // rationale of this check:
 405                 //
 406                 // any shader that is solid, nodraw AND trans is meant to clip weapon
 407                 // shots and players, but has no other effect!
 408                 //
 409                 // if it is not trans, it is caulk and should not have this side effect
 410                 //
 411                 // matching shaders:
 412                 //   common/weapclip (intended)
 413                 //   common/noimpact (is supposed to eat projectiles, but is erased anyway)
 414                 float is_weapclip = 0;
 415                 if(trace_dphitq3surfaceflags & Q3SURFACEFLAG_NODRAW)
 416                 if (!(trace_dphitq3surfaceflags & Q3SURFACEFLAG_NONSOLID))
 417                 if (!(trace_dphitcontents & DPCONTENTS_OPAQUE))
 418                         is_weapclip = 1;
 419
 420                 if(!hit || hit.solid == SOLID_BSP || hit.solid == SOLID_SLIDEBOX)
 421                         Damage_DamageInfo(start, damage * solid_penetration_left, 0, 0, max(1, force) * dir * solid_penetration_left, dtype, hit.species, self);
 422
 423                 if (hit && hit != WarpZone_trace_forent && hit != fireBullet_last_hit)  // Avoid self-damage (except after going through a warp); avoid hitting the same entity twice (engine bug).
 424                 {
 425                         fireBullet_last_hit = hit;
 426                         yoda = 0;
 427                         MUTATOR_CALLHOOK(FireBullet_Hit, self, hit, start, end, damage);
 428                         damage = frag_damage;
 429                         float g = accuracy_isgooddamage(self, hit);
 430                         Damage(hit, self, self, damage * solid_penetration_left, dtype, start, force * dir * solid_penetration_left);
 431                         // calculate hits for ballistic weapons
 432                         if(g)
 433                         {
 434                                 // do not exceed 100%
 435                                 float added_damage = min(damage - total_damage, damage * solid_penetration_left);
 436                                 total_damage += damage * solid_penetration_left;
 437                                 accuracy_add(self, PS(self).m_weapon.m_id, 0, added_damage);
 438                         }
 439                 }
 440
 441                 if (is_weapclip)
 442                         break;
 443
 444                 // go through solid!
 445                 // outside the world? forget it
 446                 if(start.x > world.maxs.x || start.y > world.maxs.y || start.z > world.maxs.z || start.x < world.mins.x || start.y < world.mins.y || start.z < world.mins.z)
 447                         break;
 448
 449                 float maxdist;
 450                 if(max_solid_penetration < 0)
 451                         break;
 452                 else if(hit.ballistics_density < -1)
 453                         break; // -2: no solid penetration, ever
 454                 else if(hit.ballistics_density < 0)
 455                         maxdist = vlen(hit.maxs - hit.mins) + 1; // -1: infinite travel distance
 456                 else if(hit.ballistics_density == 0)
 457                         maxdist = max_solid_penetration * solid_penetration_left;
 458                 else
 459                         maxdist = max_solid_penetration * solid_penetration_left * hit.ballistics_density;
 460
 461                 if(maxdist <= autocvar_g_ballistics_mindistance)
 462                         break;
 463
 464                 // move the entity along its velocity until it's out of solid, then let it resume
 465                 // The previously hit entity is ignored here!
 466                 traceline_inverted (start, start + dir * maxdist, MOVE_NORMAL, WarpZone_trace_forent, true, hit);
 467                 if(trace_fraction == 1) // 1: we never got out of solid
 468                         break;
 469
 470                 float dist_taken = max(autocvar_g_ballistics_mindistance, vlen(trace_endpos - start));
 471                 solid_penetration_left *= (dist_taken / maxdist);
 472
 473                 // Only show effect when going through a player (invisible otherwise)
 474                 if (hit && (hit.solid != SOLID_BSP))
 475                         if(vlen(trace_endpos - start) > 4)
 476                                 trailparticles(self, fireBullet_trace_callback_eff, start, trace_endpos);
 477
 478                 start = trace_endpos;
 479
 480                 if(hit.solid == SOLID_BSP)
 481                         Damage_DamageInfo(start, 0, 0, 0, max(1, force) * normalize(dir) * -solid_penetration_left, dtype, 0, self);
 482         }
 483
 484         if(lag)
 485         {
 486                 FOREACH_CLIENT(IS_PLAYER(it) && it != self, LAMBDA(antilag_restore(it)));
 487                 FOREACH_ENTITY_FLAGS(flags, FL_MONSTER, LAMBDA(
 488                         if(it != self)
 489                                 antilag_restore(it);
 490                 ));
 491         }
 492 }