qcsrc/server/g_hook.qc

   1 /*============================================
   2
   3       Wazat's Xonotic Grappling Hook
   4
   5         Contact: Wazat1@gmail.com
   6
   7
   8 Installation instructions:
   9 --------------------------
  10
  11 1. Place hook.c in your gamec source directory with the other source files.
  12
  13 2. Add this line to the bottom of progs.src:
  14
  15 gamec/hook.c
  16
  17 3. Open defs.h and add these lines to the very bottom:
  18
  19 // Wazat's grappling hook
  20 .entity         hook;
  21 void GrapplingHookFrame();
  22 void RemoveGrapplingHook(entity pl);
  23 void SetGrappleHookBindings();
  24 // hook impulses
  25 float GRAPHOOK_FIRE             = 20;
  26 float GRAPHOOK_RELEASE          = 21;
  27 // (note: you can change the hook impulse #'s to whatever you please)
  28
  29 4. Open client.c and add this to the top of PutClientInServer():
  30
  31         RemoveGrapplingHook(self); // Wazat's Grappling Hook
  32
  33 5. Find ClientConnect() (in client.c) and add these lines to the bottom:
  34
  35         // Wazat's grappling hook
  36         SetGrappleHookBindings();
  37
  38 6. Still in client.c, find PlayerPreThink and add this line just above the call to W_WeaponFrame:
  39
  40         GrapplingHookFrame();
  41
  42 7. Build and test the mod.  You'll want to bind a key to "+hook" like this:
  43 bind ctrl "+hook"
  44
  45 And you should be done!
  46
  47
  48 ============================================*/
  49
  50 .string aiment_classname;
  51 .float aiment_deadflag;
  52 void SetMovetypeFollow(entity ent, entity e)
  53 {
  54         // FIXME this may not be warpzone aware
  55         ent.movetype = MOVETYPE_FOLLOW; // make the hole follow
  56         ent.solid = SOLID_NOT; // MOVETYPE_FOLLOW is always non-solid - this means this cannot be teleported by warpzones any more! Instead, we must notice when our owner gets teleported.
  57         ent.aiment = e; // make the hole follow bmodel
  58         ent.punchangle = e.angles; // the original angles of bmodel
  59         ent.view_ofs = ent.origin - e.origin; // relative origin
  60         ent.v_angle = ent.angles - e.angles; // relative angles
  61         ent.aiment_classname = strzone(e.classname);
  62         ent.aiment_deadflag = e.deadflag;
  63 }
  64 void UnsetMovetypeFollow(entity ent)
  65 {
  66         ent.movetype = MOVETYPE_FLY;
  67         PROJECTILE_MAKETRIGGER(ent);
  68         ent.aiment = world;
  69 }
  70 float LostMovetypeFollow(entity ent)
  71 {
  72 /*
  73         if(ent.movetype != MOVETYPE_FOLLOW)
  74                 if(ent.aiment)
  75                         error("???");
  76 */
  77         if(ent.aiment)
  78         {
  79                 if(ent.aiment.classname != ent.aiment_classname)
  80                         return 1;
  81                 if(ent.aiment.deadflag != ent.aiment_deadflag)
  82                         return 1;
  83         }
  84         return 0;
  85 }
  86
  87 .float hook_length;
  88 .float hook_switchweapon;
  89
  90 void RemoveGrapplingHook(entity pl)
  91 {
  92         if(pl.hook == world)
  93                 return;
  94         remove(pl.hook);
  95         pl.hook = world;
  96         if(pl.movetype == MOVETYPE_FLY)
  97                 pl.movetype = MOVETYPE_WALK;
  98
  99         //pl.disableclientprediction = FALSE;
 100 }
 101
 102 void GrapplingHookThink();
 103 void GrapplingHook_Stop()
 104 {
 105         pointparticles(particleeffectnum("grapple_impact"), self.origin, '0 0 0', 1);
 106         sound (self, CHAN_PROJECTILE, "weapons/hook_impact.wav", VOL_BASE, ATTN_NORM);
 107
 108         self.state = 1;
 109         self.think = GrapplingHookThink;
 110         self.nextthink = time;
 111         self.touch = SUB_Null;
 112         self.velocity = '0 0 0';
 113         self.movetype = MOVETYPE_NONE;
 114         self.hook_length = -1;
 115 }
 116
 117 .vector hook_start, hook_end;
 118 float GrapplingHookSend(entity to, float sf)
 119 {
 120         WriteByte(MSG_ENTITY, ENT_CLIENT_HOOK);
 121         sf = sf & 0x7F;
 122         if(sound_allowed(MSG_BROADCAST, self.owner))
 123                 sf |= 0x80;
 124         WriteByte(MSG_ENTITY, sf);
 125         if(sf & 1)
 126         {
 127                 WriteByte(MSG_ENTITY, num_for_edict(self.owner));
 128         }
 129         if(sf & 2)
 130         {
 131                 WriteCoord(MSG_ENTITY, self.hook_start_x);
 132                 WriteCoord(MSG_ENTITY, self.hook_start_y);
 133                 WriteCoord(MSG_ENTITY, self.hook_start_z);
 134         }
 135         if(sf & 4)
 136         {
 137                 WriteCoord(MSG_ENTITY, self.hook_end_x);
 138                 WriteCoord(MSG_ENTITY, self.hook_end_y);
 139                 WriteCoord(MSG_ENTITY, self.hook_end_z);
 140         }
 141         return TRUE;
 142 }
 143
 144 void GrapplingHookThink()
 145 {
 146         float spd, dist, minlength, pullspeed, ropestretch, ropeairfriction, rubberforce, newlength, rubberforce_overstretch, s;
 147         vector dir, org, end, v0, dv, v, myorg, vs;
 148         if(self.owner.health <= 0 || self.owner.hook != self)   // how did that happen?
 149         {                                                                                                               // well, better fix it anyway
 150                 remove(self);
 151                 return;
 152         }
 153         if(LostMovetypeFollow(self))
 154         {
 155                 RemoveGrapplingHook(self.owner);
 156                 return;
 157         }
 158         if(self.aiment)
 159                 WarpZone_RefSys_AddIncrementally(self, self.aiment);
 160
 161         self.nextthink = time;
 162
 163         s = self.owner.cvar_cl_gunalign;
 164         if(s != 1 && s != 2 && s != 4)
 165                 s = 3; // default value
 166         --s;
 167         vs = hook_shotorigin[s];
 168
 169         makevectors(self.owner.v_angle);
 170         org = self.owner.origin + self.owner.view_ofs + v_forward * vs_x + v_right * -vs_y + v_up * vs_z;
 171         myorg = WarpZone_RefSys_TransformOrigin(self.owner, self, org);
 172
 173         if(self.hook_length < 0)
 174                 self.hook_length = vlen(myorg - self.origin);
 175
 176         if(self.state == 1)
 177         {
 178                 pullspeed = autocvar_g_balance_grapplehook_speed_pull;//2000;
 179                 // speed the rope is pulled with
 180
 181                 rubberforce = autocvar_g_balance_grapplehook_force_rubber;//2000;
 182                 // force the rope will use if it is stretched
 183
 184                 rubberforce_overstretch = autocvar_g_balance_grapplehook_force_rubber_overstretch;//1000;
 185                 // force the rope will use if it is stretched
 186
 187                 minlength = autocvar_g_balance_grapplehook_length_min;//100;
 188                 // minimal rope length
 189                 // if the rope goes below this length, it isn't pulled any more
 190
 191                 ropestretch = autocvar_g_balance_grapplehook_stretch;//400;
 192                 // if the rope is stretched by more than this amount, more rope is
 193                 // given to you again
 194
 195                 ropeairfriction = autocvar_g_balance_grapplehook_airfriction;//0.2
 196                 // while hanging on the rope, this friction component will help you a
 197                 // bit to control the rope
 198
 199                 dir = self.origin - myorg;
 200                 dist = vlen(dir);
 201                 dir = normalize(dir);
 202
 203                 if(autocvar_g_grappling_hook_tarzan)
 204                 {
 205                         v = v0 = WarpZone_RefSys_TransformVelocity(self.owner, self, self.owner.velocity);
 206
 207                         // first pull the rope...
 208                         if(self.owner.hook_state & HOOK_PULLING)
 209                         {
 210                                 newlength = self.hook_length;
 211                                 newlength = max(newlength - pullspeed * frametime, minlength);
 212
 213                                 if(newlength < dist - ropestretch) // overstretched?
 214                                 {
 215                                         newlength = dist - ropestretch;
 216                                         if(v * dir < 0) // only if not already moving in hook direction
 217                                                 v = v + frametime * dir * rubberforce_overstretch;
 218                                 }
 219
 220                                 self.hook_length = newlength;
 221                         }
 222
 223                         if(self.owner.hook_state & HOOK_RELEASING)
 224                         {
 225                                 newlength = dist;
 226                                 self.hook_length = newlength;
 227                         }
 228                         else
 229                         {
 230                                 // then pull the player
 231                                 spd = bound(0, (dist - self.hook_length) / ropestretch, 1);
 232                                 v = v * (1 - frametime * ropeairfriction);
 233                                 v = v + frametime * dir * spd * rubberforce;
 234
 235                                 dv = ((v - v0) * dir) * dir;
 236                                 if(autocvar_g_grappling_hook_tarzan >= 2)
 237                                 {
 238                                         if(self.aiment.movetype == MOVETYPE_WALK)
 239                                         {
 240                                                 v = v - dv * 0.5;
 241                                                 self.aiment.velocity = self.aiment.velocity - dv * 0.5;
 242                                                 self.aiment.flags &~= FL_ONGROUND;
 243                                                 self.aiment.pusher = self.owner;
 244                                                 self.aiment.pushltime = time + autocvar_g_maxpushtime;
 245                                         }
 246                                 }
 247
 248                                 self.owner.flags &~= FL_ONGROUND;
 249                         }
 250
 251                         self.owner.velocity = WarpZone_RefSys_TransformVelocity(self, self.owner, v);
 252                 }
 253                 else
 254                 {
 255                         end = self.origin - dir*50;
 256                         dist = vlen(end - myorg);
 257                         if(dist < 200)
 258                                 spd = dist * (pullspeed / 200);
 259                         else
 260                                 spd = pullspeed;
 261                         if(spd < 50)
 262                                 spd = 0;
 263                         self.owner.velocity = dir*spd;
 264                         self.owner.movetype = MOVETYPE_FLY;
 265
 266                         self.owner.flags &~= FL_ONGROUND;
 267                 }
 268         }
 269
 270         makevectors(self.angles_x * '-1 0 0' + self.angles_y * '0 1 0');
 271         myorg = WarpZone_RefSys_TransformOrigin(self, self.owner, self.origin); // + v_forward * (-9);
 272
 273         if(myorg != self.hook_start)
 274         {
 275                 self.SendFlags |= 2;
 276                 self.hook_start = myorg;
 277         }
 278         if(org != self.hook_end)
 279         {
 280                 self.SendFlags |= 4;
 281                 self.hook_end = org;
 282         }
 283 }
 284
 285 void GrapplingHookTouch (void)
 286 {
 287         if(SUB_OwnerCheck())
 288                 return;
 289         if(SUB_NoImpactCheck())
 290         {
 291                 RemoveGrapplingHook(self.owner);
 292                 return;
 293         }
 294         PROJECTILE_TOUCH;
 295
 296         GrapplingHook_Stop();
 297
 298         if(other)
 299                 if(other.movetype != MOVETYPE_NONE)
 300                 {
 301                         SetMovetypeFollow(self, other);
 302                         WarpZone_RefSys_BeginAddingIncrementally(self, self.aiment);
 303                 }
 304
 305         //self.owner.disableclientprediction = TRUE;
 306 }
 307
 308 void GrapplingHook_Damage (entity inflictor, entity attacker, float damage, float deathtype, vector hitloc, vector force)
 309 {
 310         if(self.health > 0)
 311         {
 312                 self.health = self.health - damage;
 313                 if (self.health <= 0)
 314                 {
 315                         if(attacker != self.owner)
 316                         {
 317                                 self.owner.pusher = attacker;
 318                                 self.owner.pushltime = time + autocvar_g_maxpushtime;
 319                         }
 320                         RemoveGrapplingHook(self.owner);
 321                 }
 322         }
 323 }
 324
 325 void FireGrapplingHook (void)
 326 {
 327         local entity missile;
 328         local vector org;
 329         float s;
 330         vector vs;
 331
 332         if((arena_roundbased && time < warmup) || (time < game_starttime))
 333                 return;
 334
 335         makevectors(self.v_angle);
 336
 337         s = self.cvar_cl_gunalign;
 338         if(s != 1 && s != 2 && s != 4)
 339                 s = 3; // default value
 340         --s;
 341         vs = hook_shotorigin[s];
 342
 343         // UGLY WORKAROUND: play this on CHAN_WEAPON2 so it can't cut off fire sounds
 344         sound (self, CHAN_WEAPON2, "weapons/hook_fire.wav", VOL_BASE, ATTN_NORM);
 345         org = self.origin + self.view_ofs + v_forward * vs_x + v_right * -vs_y + v_up * vs_z;
 346
 347         tracebox(self.origin + self.view_ofs, '-3 -3 -3', '3 3 3', org, MOVE_NORMAL, self);
 348         org = trace_endpos;
 349
 350         pointparticles(particleeffectnum("grapple_muzzleflash"), org, '0 0 0', 1);
 351
 352         missile = WarpZone_RefSys_SpawnSameRefSys(self);
 353         missile.owner = self;
 354         self.hook = missile;
 355         missile.classname = "grapplinghook";
 356
 357         missile.movetype = MOVETYPE_FLY;
 358         PROJECTILE_MAKETRIGGER(missile);
 359
 360         //setmodel (missile, "models/hook.md3"); // precision set below
 361         setsize (missile, '-3 -3 -3', '3 3 3');
 362         setorigin (missile, org);
 363
 364         missile.state = 0; // not latched onto anything
 365
 366         W_SetupProjectileVelocityEx(missile, v_forward, v_up, autocvar_g_balance_grapplehook_speed_fly, 0, 0, 0, FALSE);
 367
 368         missile.angles = vectoangles (missile.velocity);
 369         //missile.glow_color = 250; // 244, 250
 370         //missile.glow_size = 120;
 371         missile.touch = GrapplingHookTouch;
 372         missile.think = GrapplingHookThink;
 373         missile.nextthink = time + 0.1;
 374
 375         missile.effects = /*EF_FULLBRIGHT | EF_ADDITIVE |*/ EF_LOWPRECISION;
 376
 377         missile.health = autocvar_g_balance_grapplehook_health;//120
 378         missile.event_damage = GrapplingHook_Damage;
 379         missile.takedamage = DAMAGE_AIM;
 380         missile.damageforcescale = 0;
 381
 382         missile.hook_start = missile.hook_end = missile.origin;
 383
 384         Net_LinkEntity(missile, FALSE, 0, GrapplingHookSend);
 385 }
 386
 387 //  void GrapplingHookFrame()
 388 //  {
 389 //         // this function has been modified for Xonotic
 390 // -       if (self.BUTTON_HOOK && g_grappling_hook)
 391 //         {
 392 // -               if (!self.hook && self.hook_time <= time && !self.button6_pressed_before)
 393 // -                       if (timeoutStatus != 2) //only allow the player to fire the grappling hook if the game is not paused (timeout)
 394 // -                               FireGrapplingHook();
 395 //         }
 396 // -       else
 397 //         {
 398 //                 if (self.hook)
 399 //                         RemoveGrapplingHook(self);
 400 //         }
 401 // -       self.button6_pressed_before = self.BUTTON_HOOK;
 402 //         /*
 403 //         // if I have no hook or it's not pulling yet, make sure I'm not flying!
 404 //         if((self.hook == world || !self.hook.state) && self.movetype == MOVETYPE_FLY)
 405
 406 void GrapplingHookFrame()
 407 {
 408         if(g_grappling_hook && timeoutStatus != 2 && self.weapon != WEP_HOOK)
 409         {
 410                 // offhand hook controls
 411                 if(self.BUTTON_HOOK)
 412                 {
 413                         if not(self.hook || (self.hook_state & HOOK_WAITING_FOR_RELEASE))
 414                         {
 415                                 self.hook_state |= HOOK_FIRING;
 416                                 self.hook_state |= HOOK_WAITING_FOR_RELEASE;
 417                         }
 418                 }
 419                 else
 420                 {
 421                         self.hook_state |= HOOK_REMOVING;
 422                         self.hook_state &~= HOOK_WAITING_FOR_RELEASE;
 423                 }
 424
 425                 self.hook_state &~= HOOK_RELEASING;
 426                 if(self.BUTTON_CROUCH)
 427                 {
 428                         self.hook_state &~= HOOK_PULLING;
 429                         //self.hook_state |= HOOK_RELEASING;
 430                 }
 431                 else
 432                 {
 433                         self.hook_state |= HOOK_PULLING;
 434                         //self.hook_state &~= HOOK_RELEASING;
 435                 }
 436         }
 437         else if(!(self.items & IT_JETPACK) && !g_grappling_hook && self.switchweapon != WEP_HOOK)
 438         {
 439                 if(self.BUTTON_HOOK && !self.hook_switchweapon)
 440                         W_SwitchWeapon(WEP_HOOK);
 441         }
 442         self.hook_switchweapon = self.BUTTON_HOOK;
 443
 444         if(!g_grappling_hook && self.weapon != WEP_HOOK)
 445         {
 446                 self.hook_state &~= HOOK_FIRING;
 447                 self.hook_state |= HOOK_REMOVING;
 448         }
 449
 450         if (self.hook_state & HOOK_FIRING)
 451         {
 452                 if (self.hook)
 453                         RemoveGrapplingHook(self);
 454                 FireGrapplingHook();
 455                 self.hook_state &~= HOOK_FIRING;
 456         }
 457         else if(self.hook_state & HOOK_REMOVING)
 458         {
 459                 if (self.hook)
 460                         RemoveGrapplingHook(self);
 461                 self.hook_state &~= HOOK_REMOVING;
 462         }
 463
 464         /*
 465         // if I have no hook or it's not pulling yet, make sure I'm not flying!
 466         if((self.hook == world || !self.hook.state) && self.movetype == MOVETYPE_FLY)
 467         {
 468                 self.movetype = MOVETYPE_WALK;
 469         }
 470         if(self.impulse == GRAPHOOK_FIRE && self.hook_time <= time && g_grappling_hook)
 471         {
 472                 // fire hook
 473                 FireGrapplingHook();
 474                 return;
 475         }
 476         else if(self.hookimpulse == GRAPHOOK_RELEASE)
 477         {
 478                 // remove hook, reset movement type
 479                 RemoveGrapplingHook(self);
 480                 return;
 481         }
 482         */
 483         /*else // make sure the player's movetype is correct
 484         {
 485                 //if(self.hook == world && self.movetype == MOVETYPE_FLY)
 486                 if((self.hook == world || !self.hook.state) && self.movetype == MOVETYPE_FLY)
 487                 {
 488                         self.movetype = MOVETYPE_WALK;
 489                 }
 490         }*/
 491         // note: The hook entity does the actual pulling
 492 }
 493
 494 void GrappleHookInit()
 495 {
 496         if(g_grappling_hook)
 497         {
 498                 hook_shotorigin[0] = '8 8 -12';
 499                 hook_shotorigin[1] = '8 8 -12';
 500                 hook_shotorigin[2] = '8 8 -12';
 501                 hook_shotorigin[3] = '8 8 -12';
 502         }
 503         else
 504         {
 505                 weapon_action(WEP_HOOK, WR_PRECACHE);
 506                 hook_shotorigin[0] = shotorg_adjust_values(CL_Weapon_GetShotOrg(WEP_HOOK), FALSE, FALSE, 1);
 507                 hook_shotorigin[1] = shotorg_adjust_values(CL_Weapon_GetShotOrg(WEP_HOOK), FALSE, FALSE, 2);
 508                 hook_shotorigin[2] = shotorg_adjust_values(CL_Weapon_GetShotOrg(WEP_HOOK), FALSE, FALSE, 3);
 509                 hook_shotorigin[3] = shotorg_adjust_values(CL_Weapon_GetShotOrg(WEP_HOOK), FALSE, FALSE, 4);
 510         }
 511 }
 512
 513 void SetGrappleHookBindings()
 514 {
 515         // this function has been modified for Xonotic
 516         // don't remove these lines! old server or demos coud overwrite the new aliases
 517         stuffcmd(self, "alias +hook +button6\n");
 518         stuffcmd(self, "alias -hook -button6\n");
 519 }