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/net_linked.qh>
  14 #include <common/util.qh>
  15
  16 #include <common/weapons/_all.qh>
  17 #include <common/state.qh>
  18
  19 #include <lib/warpzone/common.qh>
  20
  21 // this function calculates w_shotorg and w_shotdir based on the weapon model
  22 // offset, trueaim and antilag, and won't put w_shotorg inside a wall.
  23 // make sure you call makevectors first (FIXME?)
  24 void W_SetupShot_Dir_ProjectileSize_Range(entity ent, .entity weaponentity, vector s_forward, vector mi, vector ma, float antilag, float recoil, Sound snd, float chan, float maxdamage, float range)
  25 {
  26         TC(Sound, snd);
  27         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?
  28         float oldsolid;
  29         vector vecs, dv;
  30         oldsolid = ent.dphitcontentsmask;
  31         if (IS_PLAYER(ent) && ent.(weaponentity).m_weapon == WEP_RIFLE)
  32                 ent.dphitcontentsmask = DPCONTENTS_BODY | DPCONTENTS_CORPSE;
  33         else
  34                 ent.dphitcontentsmask = DPCONTENTS_SOLID | DPCONTENTS_BODY | DPCONTENTS_CORPSE;
  35         if(antilag)
  36                 WarpZone_traceline_antilag(NULL, ent.origin + ent.view_ofs, ent.origin + ent.view_ofs + s_forward * range, MOVE_NORMAL, ent, ANTILAG_LATENCY(ent));
  37                 // passing NULL, because we do NOT want it to touch dphitcontentsmask
  38         else
  39                 WarpZone_TraceLine(ent.origin + ent.view_ofs, ent.origin + ent.view_ofs + s_forward * range, MOVE_NOMONSTERS, ent);
  40         ent.dphitcontentsmask = DPCONTENTS_SOLID | DPCONTENTS_BODY | DPCONTENTS_CORPSE;
  41
  42         vector vf, vr, vu;
  43         vf = v_forward;
  44         vr = v_right;
  45         vu = v_up;
  46         w_shotend = WarpZone_UnTransformOrigin(WarpZone_trace_transform, trace_endpos); // warpzone support
  47         v_forward = vf;
  48         v_right = vr;
  49         v_up = vu;
  50
  51         // un-adjust trueaim if shotend is too close
  52         if(vdist(w_shotend - (ent.origin + ent.view_ofs), <, autocvar_g_trueaim_minrange))
  53                 w_shotend = ent.origin + ent.view_ofs + s_forward * autocvar_g_trueaim_minrange;
  54
  55         // track max damage
  56         if (IS_PLAYER(ent) && accuracy_canbegooddamage(ent))
  57                 accuracy_add(ent, ent.(weaponentity).m_weapon.m_id, maxdamage, 0);
  58
  59         if(IS_PLAYER(ent))
  60                 W_HitPlotAnalysis(ent, weaponentity, v_forward, v_right, v_up);
  61
  62         vector md = ent.(weaponentity).movedir;
  63         if(md.x > 0)
  64                 vecs = md;
  65         else
  66                 vecs = '0 0 0';
  67
  68         dv = v_right * -vecs.y + v_up * vecs.z;
  69         w_shotorg = ent.origin + ent.view_ofs + dv;
  70
  71         // now move the shotorg forward as much as requested if possible
  72         if(antilag)
  73         {
  74                 if(CS(ent).antilag_debug)
  75                         tracebox_antilag(ent, w_shotorg, mi, ma, w_shotorg + v_forward * (vecs.x + nudge), MOVE_NORMAL, ent, CS(ent).antilag_debug);
  76                 else
  77                         tracebox_antilag(ent, w_shotorg, mi, ma, w_shotorg + v_forward * (vecs.x + nudge), MOVE_NORMAL, ent, ANTILAG_LATENCY(ent));
  78         }
  79         else
  80                 tracebox(w_shotorg, mi, ma, w_shotorg + v_forward * (vecs.x + nudge), MOVE_NORMAL, ent);
  81         w_shotorg = trace_endpos - v_forward * nudge;
  82         // calculate the shotdir from the chosen shotorg
  83         w_shotdir = normalize(w_shotend - w_shotorg);
  84
  85         //vector prevdir = w_shotdir;
  86         //vector prevorg = w_shotorg;
  87         //vector prevend = w_shotend;
  88
  89         if (antilag)
  90         if (!ent.cvar_cl_noantilag)
  91         {
  92                 if (autocvar_g_antilag == 1) // switch to "ghost" if not hitting original
  93                 {
  94                         traceline(w_shotorg, w_shotorg + w_shotdir * range, MOVE_NORMAL, ent);
  95                         if (!trace_ent.takedamage)
  96                         {
  97                                 traceline_antilag_force (ent, w_shotorg, w_shotorg + w_shotdir * range, MOVE_NORMAL, ent, ANTILAG_LATENCY(ent));
  98                                 if (trace_ent.takedamage && IS_PLAYER(trace_ent))
  99                                 {
 100                                         entity e;
 101                                         e = trace_ent;
 102                                         traceline(w_shotorg, e.origin, MOVE_NORMAL, ent);
 103                                         if(trace_ent == e)
 104                                                 w_shotdir = normalize(trace_ent.origin - w_shotorg);
 105                                 }
 106                         }
 107                 }
 108                 else if(autocvar_g_antilag == 3) // client side hitscan
 109                 {
 110                         // this part MUST use prydon cursor
 111                         if (ent.cursor_trace_ent)                 // client was aiming at someone
 112                         if (ent.cursor_trace_ent != ent)         // just to make sure
 113                         if (ent.cursor_trace_ent.takedamage)      // and that person is killable
 114                         if (IS_PLAYER(ent.cursor_trace_ent)) // and actually a player
 115                         {
 116                                 // verify that the shot would miss without antilag
 117                                 // (avoids an issue where guns would always shoot at their origin)
 118                                 traceline(w_shotorg, w_shotorg + w_shotdir * range, MOVE_NORMAL, ent);
 119                                 if (!trace_ent.takedamage)
 120                                 {
 121                                         // verify that the shot would hit if altered
 122                                         traceline(w_shotorg, ent.cursor_trace_ent.origin, MOVE_NORMAL, ent);
 123                                         if (trace_ent == ent.cursor_trace_ent)
 124                                                 w_shotdir = normalize(ent.cursor_trace_ent.origin - w_shotorg);
 125                                         else
 126                                                 LOG_INFO("antilag fail\n");
 127                                 }
 128                         }
 129                 }
 130         }
 131
 132         ent.dphitcontentsmask = oldsolid; // restore solid type (generally SOLID_SLIDEBOX)
 133
 134         if (!autocvar_g_norecoil)
 135                 ent.punchangle_x = recoil * -1;
 136
 137         if (snd != SND_Null) {
 138                 sound (ent, chan, snd, VOL_BASE, ATTN_NORM);
 139                 W_PlayStrengthSound(ent);
 140         }
 141
 142         // nudge w_shotend so a trace to w_shotend hits
 143         w_shotend = w_shotend + normalize(w_shotend - w_shotorg) * nudge;
 144         //if(w_shotend != prevend) { printf("SERVER: shotEND differs: %s - %s\n", vtos(w_shotend), vtos(prevend)); }
 145         //if(w_shotorg != prevorg) { printf("SERVER: shotORG differs: %s - %s\n", vtos(w_shotorg), vtos(prevorg)); }
 146         //if(w_shotdir != prevdir) { printf("SERVER: shotDIR differs: %s - %s\n", vtos(w_shotdir), vtos(prevdir)); }
 147 }
 148
 149 vector W_CalculateProjectileVelocity(entity actor, vector pvelocity, vector mvelocity, float forceAbsolute)
 150 {
 151         vector mdirection;
 152         float mspeed;
 153         vector outvelocity;
 154
 155         mvelocity = mvelocity * W_WeaponSpeedFactor(actor);
 156
 157         mdirection = normalize(mvelocity);
 158         mspeed = vlen(mvelocity);
 159
 160         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);
 161
 162         return outvelocity;
 163 }
 164
 165 void W_SetupProjVelocity_Explicit(entity proj, vector dir, vector upDir, float pSpeed, float pUpSpeed, float pZSpeed, float spread, float forceAbsolute)
 166 {
 167         if(proj.owner == NULL)
 168                 error("Unowned missile");
 169
 170         dir = dir + upDir * (pUpSpeed / pSpeed);
 171         dir.z += pZSpeed / pSpeed;
 172         pSpeed *= vlen(dir);
 173         dir = normalize(dir);
 174
 175         #if 0
 176         if(autocvar_g_projectiles_spread_style != mspercallsstyle)
 177         {
 178                 mspercallsum = mspercallcount = 0;
 179                 mspercallsstyle = autocvar_g_projectiles_spread_style;
 180         }
 181         mspercallsum -= gettime(GETTIME_HIRES);
 182         #endif
 183
 184         dir = W_CalculateSpread(dir, spread, g_weaponspreadfactor, autocvar_g_projectiles_spread_style);
 185
 186         #if 0
 187         mspercallsum += gettime(GETTIME_HIRES);
 188         mspercallcount += 1;
 189         LOG_INFO("avg: ", ftos(mspercallcount / mspercallsum), " per sec\n");
 190         #endif
 191
 192         proj.velocity = W_CalculateProjectileVelocity(proj.owner, proj.owner.velocity, pSpeed * dir, forceAbsolute);
 193 }
 194
 195
 196 // ====================
 197 //  Ballistics Tracing
 198 // ====================
 199
 200 void FireRailgunBullet (entity this, .entity weaponentity, vector start, vector end, float bdamage, float bforce, float mindist, float maxdist, float halflifedist, float forcehalflifedist, int deathtype)
 201 {
 202         entity pseudoprojectile = NULL;
 203
 204         vector dir = normalize(end - start);
 205         float length = vlen(end - start);
 206         vector force = dir * bforce;
 207
 208         // go a little bit into the wall because we need to hit this wall later
 209         end = end + dir;
 210
 211         float totaldmg = 0;
 212
 213         // trace multiple times until we hit a wall, each obstacle will be made
 214         // non-solid so we can hit the next, while doing this we spawn effects and
 215         // note down which entities were hit so we can damage them later
 216         entity o = this;
 217         while (1)
 218         {
 219                 if(CS(this).antilag_debug)
 220                         WarpZone_traceline_antilag (this, start, end, false, o, CS(this).antilag_debug);
 221                 else
 222                         WarpZone_traceline_antilag (this, start, end, false, o, ANTILAG_LATENCY(this));
 223                 if(o && WarpZone_trace_firstzone)
 224                 {
 225                         o = NULL;
 226                         continue;
 227                 }
 228
 229                 if(trace_ent.solid == SOLID_BSP || trace_ent.solid == SOLID_SLIDEBOX)
 230                         Damage_DamageInfo(trace_endpos, bdamage, 0, 0, force, deathtype, trace_ent.species, this);
 231
 232                 // if it is NULL we can't hurt it so stop now
 233                 if (trace_ent == NULL || trace_fraction == 1)
 234                         break;
 235
 236                 // make the entity non-solid so we can hit the next one
 237                 trace_ent.railgunhit = true;
 238                 trace_ent.railgunhitloc = end;
 239                 trace_ent.railgunhitsolidbackup = trace_ent.solid;
 240                 trace_ent.railgundistance = vlen(WarpZone_UnTransformOrigin(WarpZone_trace_transform, trace_endpos) - start);
 241                 trace_ent.railgunforce = WarpZone_TransformVelocity(WarpZone_trace_transform, force);
 242
 243                 // stop if this is a wall
 244                 if (trace_ent.solid == SOLID_BSP)
 245                         break;
 246
 247                 // make the entity non-solid
 248                 trace_ent.solid = SOLID_NOT;
 249         }
 250
 251         vector endpoint = trace_endpos;
 252         entity endent = trace_ent;
 253         float endq3surfaceflags = trace_dphitq3surfaceflags;
 254
 255         // find all the entities the railgun hit and restore their solid state
 256         FOREACH_ENTITY_FLOAT(railgunhit, true,
 257         {
 258                 it.solid = it.railgunhitsolidbackup;
 259         });
 260
 261         // spawn a temporary explosion entity for RadiusDamage calls
 262         //explosion = spawn();
 263
 264         // Find all non-hit players the beam passed close by
 265         if(deathtype == WEP_VAPORIZER.m_id || deathtype == WEP_VORTEX.m_id)
 266         {
 267                 FOREACH_CLIENT(IS_REAL_CLIENT(it) && it != this, LAMBDA(
 268                         if(!it.railgunhit)
 269                         if(!(IS_SPEC(it) && it.enemy == this))
 270                         {
 271                                 msg_entity = it;
 272                                 // nearest point on the beam
 273                                 vector beampos = start + dir * bound(0, (msg_entity.origin - start) * dir, length);
 274
 275                                 float f = bound(0, 1 - vlen(beampos - msg_entity.origin) / 512, 1);
 276                                 if(f <= 0)
 277                                         continue;
 278
 279                                 if(!pseudoprojectile)
 280                                         pseudoprojectile = spawn(); // we need this so the sound uses the "entchannel4" volume
 281                                 soundtoat(MSG_ONE, pseudoprojectile, beampos, CH_SHOTS, SND(NEXWHOOSH_RANDOM()), VOL_BASE * f, ATTEN_NONE);
 282                         }
 283                 ));
 284
 285                 if(pseudoprojectile)
 286                         delete(pseudoprojectile);
 287         }
 288
 289         // find all the entities the railgun hit and hurt them
 290         FOREACH_ENTITY_FLOAT(railgunhit, true,
 291         {
 292                 // get the details we need to call the damage function
 293                 vector hitloc = it.railgunhitloc;
 294
 295                 float foff = ExponentialFalloff(mindist, maxdist, halflifedist, it.railgundistance);
 296                 float ffs = ExponentialFalloff(mindist, maxdist, forcehalflifedist, it.railgundistance);
 297
 298                 if(accuracy_isgooddamage(this, it))
 299                         totaldmg += bdamage * foff;
 300
 301                 // apply the damage
 302                 if (it.takedamage)
 303                         Damage (it, this, this, bdamage * foff, deathtype, hitloc, it.railgunforce * ffs);
 304
 305                 // create a small explosion to throw gibs around (if applicable)
 306                 //setorigin(explosion, hitloc);
 307                 //RadiusDamage (explosion, this, 10, 0, 50, NULL, NULL, 300, deathtype);
 308
 309                 it.railgunhitloc = '0 0 0';
 310                 it.railgunhitsolidbackup = SOLID_NOT;
 311                 it.railgunhit = false;
 312                 it.railgundistance = 0;
 313         });
 314
 315         // calculate hits and fired shots for hitscan
 316         accuracy_add(this, this.(weaponentity).m_weapon.m_id, 0, min(bdamage, totaldmg));
 317
 318         trace_endpos = endpoint;
 319         trace_ent = endent;
 320         trace_dphitq3surfaceflags = endq3surfaceflags;
 321 }
 322
 323 void fireBullet_trace_callback(vector start, vector hit, vector end)
 324 {
 325         if(vdist(hit - start, >, 16))
 326                 trailparticles(NULL, fireBullet_trace_callback_eff, start, hit);
 327         WarpZone_trace_forent = NULL;
 328         fireBullet_last_hit = NULL;
 329 }
 330
 331 void fireBullet(entity this, .entity weaponentity, vector start, vector dir, float spread, float max_solid_penetration, float damage, float force, float dtype, int tracereffects)
 332 {
 333         vector  end;
 334
 335         dir = normalize(dir + randomvec() * spread);
 336         end = start + dir * max_shot_distance;
 337
 338         fireBullet_last_hit = NULL;
 339         float solid_penetration_left = 1;
 340         float total_damage = 0;
 341
 342         if(tracereffects & EF_RED)
 343                 fireBullet_trace_callback_eff = EFFECT_RIFLE;
 344         else if(tracereffects & EF_BLUE)
 345                 fireBullet_trace_callback_eff = EFFECT_RIFLE_WEAK;
 346         else
 347                 fireBullet_trace_callback_eff = EFFECT_BULLET;
 348
 349         float lag = ANTILAG_LATENCY(this);
 350         if(lag < 0.001)
 351                 lag = 0;
 352         if (!IS_REAL_CLIENT(this))
 353                 lag = 0;
 354         if(autocvar_g_antilag == 0 || this.cvar_cl_noantilag)
 355                 lag = 0; // only do hitscan, but no antilag
 356         if(lag)
 357         {
 358                 FOREACH_CLIENT(IS_PLAYER(it) && it != this, antilag_takeback(it, CS(it), time - lag));
 359                 IL_EACH(g_monsters, it != this,
 360                 {
 361                         antilag_takeback(it, it, time - lag);
 362                 });
 363         }
 364
 365         // change shooter to SOLID_BBOX so the shot can hit corpses
 366         int oldsolid = this.dphitcontentsmask;
 367         if(this)
 368                 this.dphitcontentsmask = DPCONTENTS_SOLID | DPCONTENTS_BODY | DPCONTENTS_CORPSE;
 369
 370         WarpZone_trace_forent = this;
 371
 372         for (;;)
 373         {
 374                 // TODO also show effect while tracing
 375                 WarpZone_TraceBox_ThroughZone(start, '0 0 0', '0 0 0', end, false, WarpZone_trace_forent, NULL, fireBullet_trace_callback);
 376                 dir = WarpZone_TransformVelocity(WarpZone_trace_transform, dir);
 377                 end = WarpZone_TransformOrigin(WarpZone_trace_transform, end);
 378                 start = trace_endpos;
 379                 entity hit = trace_ent;
 380
 381                 // traced up to max_shot_distance and didn't hit anything at all
 382                 if (trace_fraction == 1.0)
 383                         break;
 384
 385                 // When hitting sky, stop.
 386                 if (trace_dphitq3surfaceflags & Q3SURFACEFLAG_SKY)
 387                         break;
 388
 389                 // can't use noimpact, as we need to pass through walls
 390                 //if (trace_dphitq3surfaceflags & Q3SURFACEFLAG_NOIMPACT)
 391                         //break;
 392
 393                 // if we hit "weapclip", bail out
 394                 //
 395                 // rationale of this check:
 396                 //
 397                 // any shader that is solid, nodraw AND trans is meant to clip weapon
 398                 // shots and players, but has no other effect!
 399                 //
 400                 // if it is not trans, it is caulk and should not have this side effect
 401                 //
 402                 // matching shaders:
 403                 //   common/weapclip (intended)
 404                 //   common/noimpact (is supposed to eat projectiles, but is erased anyway)
 405                 bool is_weapclip = false;
 406                 if(trace_dphitq3surfaceflags & Q3SURFACEFLAG_NODRAW)
 407                 if (!(trace_dphitq3surfaceflags & Q3SURFACEFLAG_NONSOLID))
 408                 if (!(trace_dphitcontents & DPCONTENTS_OPAQUE))
 409                         is_weapclip = true;
 410
 411                 if(!hit || hit.solid == SOLID_BSP || hit.solid == SOLID_SLIDEBOX)
 412                         Damage_DamageInfo(start, damage * solid_penetration_left, 0, 0, max(1, force) * dir * solid_penetration_left, dtype, hit.species, this);
 413
 414                 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).
 415                 {
 416                         fireBullet_last_hit = hit;
 417                         yoda = 0;
 418                         MUTATOR_CALLHOOK(FireBullet_Hit, this, hit, start, end, damage, this.(weaponentity));
 419                         damage = M_ARGV(4, float);
 420                         float g = accuracy_isgooddamage(this, hit);
 421                         Damage(hit, this, this, damage * solid_penetration_left, dtype, start, force * dir * solid_penetration_left);
 422                         // calculate hits for ballistic weapons
 423                         if(g)
 424                         {
 425                                 // do not exceed 100%
 426                                 float added_damage = min(damage - total_damage, damage * solid_penetration_left);
 427                                 total_damage += damage * solid_penetration_left;
 428                                 accuracy_add(this, this.(weaponentity).m_weapon.m_id, 0, added_damage);
 429                         }
 430                 }
 431
 432                 if (is_weapclip && !autocvar_g_ballistics_penetrate_clips)
 433                         break;
 434
 435                 // go through solid!
 436                 // outside the world? forget it
 437                 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)
 438                         break;
 439
 440                 float maxdist;
 441                 if(max_solid_penetration < 0)
 442                         break;
 443                 else if(hit.ballistics_density < -1)
 444                         break; // -2: no solid penetration, ever
 445                 else if(hit.ballistics_density < 0)
 446                         maxdist = vlen(hit.maxs - hit.mins) + 1; // -1: infinite travel distance
 447                 else if(hit.ballistics_density == 0)
 448                         maxdist = max_solid_penetration * solid_penetration_left;
 449                 else
 450                         maxdist = max_solid_penetration * solid_penetration_left * hit.ballistics_density;
 451
 452                 if(maxdist <= autocvar_g_ballistics_mindistance)
 453                         break;
 454
 455                 // move the entity along its velocity until it's out of solid, then let it resume
 456                 // The previously hit entity is ignored here!
 457                 traceline_inverted (start, start + dir * maxdist, MOVE_NORMAL, WarpZone_trace_forent, true, hit);
 458                 if(trace_fraction == 1) // 1: we never got out of solid
 459                         break;
 460
 461                 float dist_taken = max(autocvar_g_ballistics_mindistance, vlen(trace_endpos - start));
 462                 // fraction_used_of_what_is_left = dist_taken / maxdist
 463                 // solid_penetration_left = solid_penetration_left - solid_penetration_left * fraction_used_of_what_is_left
 464                 solid_penetration_left *= 1 - dist_taken / maxdist;
 465                 solid_penetration_left = max(solid_penetration_left, 0);
 466
 467                 // Only show effect when going through a player (invisible otherwise)
 468                 if (hit && (hit.solid != SOLID_BSP))
 469                         if(vdist(trace_endpos - start, >, 4))
 470                                 trailparticles(this, fireBullet_trace_callback_eff, start, trace_endpos);
 471
 472                 start = trace_endpos;
 473
 474                 if(hit.solid == SOLID_BSP)
 475                         Damage_DamageInfo(start, 0, 0, 0, max(1, force) * normalize(dir) * -solid_penetration_left, dtype, 0, this);
 476         }
 477
 478         if(lag)
 479         {
 480                 FOREACH_CLIENT(IS_PLAYER(it) && it != this, antilag_restore(it, CS(it)));
 481                 IL_EACH(g_monsters, it != this,
 482                 {
 483                         antilag_restore(it, it);
 484                 });
 485         }
 486
 487         // restore shooter solid type
 488         if(this)
 489                 this.dphitcontentsmask = oldsolid;
 490 }