qcsrc/server/t_jumppads.qc

   1 const float PUSH_ONCE                   = 1;
   2 const float PUSH_SILENT         = 2;
   3
   4 .float pushltime;
   5 .float istypefrag;
   6 .float height;
   7
   8 void() SUB_UseTargets;
   9
  10 float trigger_push_calculatevelocity_flighttime;
  11
  12 void trigger_push_use()
  13 {
  14         if(teamplay)
  15                 self.team = activator.team;
  16 }
  17
  18 /*
  19         trigger_push_calculatevelocity
  20
  21         Arguments:
  22           org - origin of the object which is to be pushed
  23           tgt - target entity (can be either a point or a model entity; if it is
  24                 the latter, its midpoint is used)
  25           ht  - jump height, measured from the higher one of org and tgt's midpoint
  26
  27         Returns: velocity for the jump
  28         the global trigger_push_calculatevelocity_flighttime is set to the total
  29         jump time
  30  */
  31
  32 vector trigger_push_calculatevelocity(vector org, entity tgt, float ht)
  33 {
  34         float grav, sdist, zdist, vs, vz, jumpheight;
  35         vector sdir, torg;
  36
  37         torg = tgt.origin + (tgt.mins + tgt.maxs) * 0.5;
  38
  39         grav = autocvar_sv_gravity;
  40         if(other.gravity)
  41                 grav *= other.gravity;
  42
  43         zdist = torg.z - org.z;
  44         sdist = vlen(torg - org - zdist * '0 0 1');
  45         sdir = normalize(torg - org - zdist * '0 0 1');
  46
  47         // how high do we need to push the player?
  48         jumpheight = fabs(ht);
  49         if(zdist > 0)
  50                 jumpheight = jumpheight + zdist;
  51
  52         /*
  53                 STOP.
  54
  55                 You will not understand the following equations anyway...
  56                 But here is what I did to get them.
  57
  58                 I used the functions
  59
  60                   s(t) = t * vs
  61                   z(t) = t * vz - 1/2 grav t^2
  62
  63                 and solved for:
  64
  65                   s(ti) = sdist
  66                   z(ti) = zdist
  67                   max(z, ti) = jumpheight
  68
  69                 From these three equations, you will find the three parameters vs, vz
  70                 and ti.
  71          */
  72
  73         // push him so high...
  74         vz = sqrt(fabs(2 * grav * jumpheight)); // NOTE: sqrt(positive)!
  75
  76         // we start with downwards velocity only if it's a downjump and the jump apex should be outside the jump!
  77         if(ht < 0)
  78                 if(zdist < 0)
  79                         vz = -vz;
  80
  81         vector solution;
  82         solution = solve_quadratic(0.5 * grav, -vz, zdist); // equation "z(ti) = zdist"
  83         // ALWAYS solvable because jumpheight >= zdist
  84         if(!solution.z)
  85                 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)
  86         if(zdist == 0)
  87                 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)
  88
  89         if(zdist < 0)
  90         {
  91                 // down-jump
  92                 if(ht < 0)
  93                 {
  94                         // almost straight line type
  95                         // jump apex is before the jump
  96                         // we must take the larger one
  97                         trigger_push_calculatevelocity_flighttime = solution.y;
  98                 }
  99                 else
 100                 {
 101                         // regular jump
 102                         // jump apex is during the jump
 103                         // we must take the larger one too
 104                         trigger_push_calculatevelocity_flighttime = solution.y;
 105                 }
 106         }
 107         else
 108         {
 109                 // up-jump
 110                 if(ht < 0)
 111                 {
 112                         // almost straight line type
 113                         // jump apex is after the jump
 114                         // we must take the smaller one
 115                         trigger_push_calculatevelocity_flighttime = solution.x;
 116                 }
 117                 else
 118                 {
 119                         // regular jump
 120                         // jump apex is during the jump
 121                         // we must take the larger one
 122                         trigger_push_calculatevelocity_flighttime = solution.y;
 123                 }
 124         }
 125         vs = sdist / trigger_push_calculatevelocity_flighttime;
 126
 127         // finally calculate the velocity
 128         return sdir * vs + '0 0 1' * vz;
 129 }
 130
 131 void trigger_push_touch()
 132 {
 133         if (self.active == ACTIVE_NOT)
 134                 return;
 135
 136         if (!isPushable(other))
 137                 return;
 138
 139         if(self.team)
 140                 if(((self.spawnflags & 4) == 0) == (self.team != other.team))
 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         }
 149         else if(self.target)
 150         {
 151                 entity e;
 152                 RandomSelection_Init();
 153                 for(e = world; (e = find(e, targetname, self.target)); )
 154                 {
 155                         if(e.cnt)
 156                                 RandomSelection_Add(e, 0, string_null, e.cnt, 1);
 157                         else
 158                                 RandomSelection_Add(e, 0, string_null, 1, 1);
 159                 }
 160                 other.velocity = trigger_push_calculatevelocity(other.origin, RandomSelection_chosen_ent, self.height);
 161         }
 162         else
 163         {
 164                 other.velocity = self.movedir;
 165         }
 166
 167         other.flags &= ~FL_ONGROUND;
 168
 169         if (IS_PLAYER(other))
 170         {
 171                 // reset tracking of oldvelocity for impact damage (sudden velocity changes)
 172                 other.oldvelocity = other.velocity;
 173
 174                 if(self.pushltime < time)  // prevent "snorring" sound when a player hits the jumppad more than once
 175                 {
 176                         // flash when activated
 177                         pointparticles(particleeffectnum("jumppad_activate"), other.origin, other.velocity, 1);
 178                         sound (other, CH_TRIGGER, self.noise, VOL_BASE, ATTEN_NORM);
 179                         self.pushltime = time + 0.2;
 180                 }
 181                 if(IS_REAL_CLIENT(other) || IS_BOT_CLIENT(other))
 182                 {
 183                         float i;
 184                         float found;
 185                         found = false;
 186                         for(i = 0; i < other.jumppadcount && i < NUM_JUMPPADSUSED; ++i)
 187                                 if(other.(jumppadsused[i]) == self)
 188                                         found = true;
 189                         if(!found)
 190                         {
 191                                 other.(jumppadsused[other.jumppadcount % NUM_JUMPPADSUSED]) = self;
 192                                 other.jumppadcount = other.jumppadcount + 1;
 193                         }
 194
 195                         if(IS_REAL_CLIENT(other))
 196                         {
 197                                 if(self.message)
 198                                         centerprint(other, self.message);
 199                         }
 200                         else
 201                                 other.lastteleporttime = time;
 202
 203                         if (other.deadflag == DEAD_NO)
 204                                 animdecide_setaction(other, ANIMACTION_JUMP, true);
 205                 }
 206                 else
 207                         other.jumppadcount = true;
 208
 209                 // reset tracking of who pushed you into a hazard (for kill credit)
 210                 other.pushltime = 0;
 211                 other.istypefrag = 0;
 212         }
 213
 214         if(self.enemy.target)
 215         {
 216                 entity oldself;
 217                 oldself = self;
 218                 activator = other;
 219                 self = self.enemy;
 220                 SUB_UseTargets();
 221                 self = oldself;
 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 }
 248
 249 .vector dest;
 250 void trigger_push_findtarget()
 251 {
 252         entity e, t;
 253         vector org;
 254
 255         // first calculate a typical start point for the jump
 256         org = (self.absmin + self.absmax) * 0.5;
 257         org_z = self.absmax.z - PL_MIN_z;
 258
 259         if (self.target)
 260         {
 261                 float n;
 262                 n = 0;
 263                 for(t = world; (t = find(t, targetname, self.target)); )
 264                 {
 265                         ++n;
 266                         e = spawn();
 267                         setorigin(e, org);
 268                         setsize(e, PL_MIN, PL_MAX);
 269                         e.velocity = trigger_push_calculatevelocity(org, t, self.height);
 270                         tracetoss(e, e);
 271                         if(e.movetype == MOVETYPE_NONE)
 272                                 waypoint_spawnforteleporter(self, trace_endpos, vlen(trace_endpos - org) / vlen(e.velocity));
 273                         remove(e);
 274                 }
 275
 276                 if(n == 0)
 277                 {
 278                         // no dest!
 279                         objerror ("Jumppad with nonexistant target");
 280                         return;
 281                 }
 282                 else if(n == 1)
 283                 {
 284                         // exactly one dest - bots love that
 285                         self.enemy = find(world, targetname, self.target);
 286                 }
 287                 else
 288                 {
 289                         // have to use random selection every single time
 290                         self.enemy = world;
 291                 }
 292         }
 293         else
 294         {
 295                 e = spawn();
 296                 setorigin(e, org);
 297                 setsize(e, PL_MIN, PL_MAX);
 298                 e.velocity = self.movedir;
 299                 tracetoss(e, e);
 300                 waypoint_spawnforteleporter(self, trace_endpos, vlen(trace_endpos - org) / vlen(e.velocity));
 301                 remove(e);
 302         }
 303 }
 304
 305 /*
 306  * ENTITY PARAMETERS:
 307  *
 308  *   target:  target of jump
 309  *   height:  the absolute value is the height of the highest point of the jump
 310  *            trajectory above the higher one of the player and the target.
 311  *            the sign indicates whether the highest point is INSIDE (positive)
 312  *            or OUTSIDE (negative) of the jump trajectory. General rule: use
 313  *            positive values for targets mounted on the floor, and use negative
 314  *            values to target a point on the ceiling.
 315  *   movedir: if target is not set, this * speed * 10 is the velocity to be reached.
 316  */
 317 void spawnfunc_trigger_push()
 318 {
 319         SetMovedir ();
 320
 321         EXACTTRIGGER_INIT;
 322
 323         self.active = ACTIVE_ACTIVE;
 324         self.use = trigger_push_use;
 325         self.touch = trigger_push_touch;
 326
 327         // normal push setup
 328         if (!self.speed)
 329                 self.speed = 1000;
 330         self.movedir = self.movedir * self.speed * 10;
 331
 332         if (!self.noise)
 333                 self.noise = "misc/jumppad.wav";
 334         precache_sound (self.noise);
 335
 336         // this must be called to spawn the teleport waypoints for bots
 337         InitializeEntity(self, trigger_push_findtarget, INITPRIO_FINDTARGET);
 338 }
 339
 340 void spawnfunc_target_push() {}
 341 void spawnfunc_info_notnull() {}
 342 void spawnfunc_target_position() {}