qcsrc/server/t_jumppads.qc

   1 #include "t_jumppads.qh"
   2
   3 void trigger_push_use()
   4 {
   5         if(teamplay)
   6                 self.team = activator.team;
   7 }
   8
   9 /*
  10         trigger_push_calculatevelocity
  11
  12         Arguments:
  13           org - origin of the object which is to be pushed
  14           tgt - target entity (can be either a point or a model entity; if it is
  15                 the latter, its midpoint is used)
  16           ht  - jump height, measured from the higher one of org and tgt's midpoint
  17
  18         Returns: velocity for the jump
  19         the global trigger_push_calculatevelocity_flighttime is set to the total
  20         jump time
  21  */
  22
  23 vector trigger_push_calculatevelocity(vector org, entity tgt, float ht)
  24 {
  25         float grav, sdist, zdist, vs, vz, jumpheight;
  26         vector sdir, torg;
  27
  28         torg = tgt.origin + (tgt.mins + tgt.maxs) * 0.5;
  29
  30         grav = autocvar_sv_gravity;
  31         if(other.gravity)
  32                 grav *= other.gravity;
  33
  34         zdist = torg.z - org.z;
  35         sdist = vlen(torg - org - zdist * '0 0 1');
  36         sdir = normalize(torg - org - zdist * '0 0 1');
  37
  38         // how high do we need to push the player?
  39         jumpheight = fabs(ht);
  40         if(zdist > 0)
  41                 jumpheight = jumpheight + zdist;
  42
  43         /*
  44                 STOP.
  45
  46                 You will not understand the following equations anyway...
  47                 But here is what I did to get them.
  48
  49                 I used the functions
  50
  51                   s(t) = t * vs
  52                   z(t) = t * vz - 1/2 grav t^2
  53
  54                 and solved for:
  55
  56                   s(ti) = sdist
  57                   z(ti) = zdist
  58                   max(z, ti) = jumpheight
  59
  60                 From these three equations, you will find the three parameters vs, vz
  61                 and ti.
  62          */
  63
  64         // push him so high...
  65         vz = sqrt(fabs(2 * grav * jumpheight)); // NOTE: sqrt(positive)!
  66
  67         // we start with downwards velocity only if it's a downjump and the jump apex should be outside the jump!
  68         if(ht < 0)
  69                 if(zdist < 0)
  70                         vz = -vz;
  71
  72         vector solution;
  73         solution = solve_quadratic(0.5 * grav, -vz, zdist); // equation "z(ti) = zdist"
  74         // ALWAYS solvable because jumpheight >= zdist
  75         if(!solution.z)
  76                 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)
  77         if(zdist == 0)
  78                 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)
  79
  80         if(zdist < 0)
  81         {
  82                 // down-jump
  83                 if(ht < 0)
  84                 {
  85                         // almost straight line type
  86                         // jump apex is before the jump
  87                         // we must take the larger one
  88                         trigger_push_calculatevelocity_flighttime = solution.y;
  89                 }
  90                 else
  91                 {
  92                         // regular jump
  93                         // jump apex is during the jump
  94                         // we must take the larger one too
  95                         trigger_push_calculatevelocity_flighttime = solution.y;
  96                 }
  97         }
  98         else
  99         {
 100                 // up-jump
 101                 if(ht < 0)
 102                 {
 103                         // almost straight line type
 104                         // jump apex is after the jump
 105                         // we must take the smaller one
 106                         trigger_push_calculatevelocity_flighttime = solution.x;
 107                 }
 108                 else
 109                 {
 110                         // regular jump
 111                         // jump apex is during the jump
 112                         // we must take the larger one
 113                         trigger_push_calculatevelocity_flighttime = solution.y;
 114                 }
 115         }
 116         vs = sdist / trigger_push_calculatevelocity_flighttime;
 117
 118         // finally calculate the velocity
 119         return sdir * vs + '0 0 1' * vz;
 120 }
 121
 122 void trigger_push_touch()
 123 {
 124         if (self.active == ACTIVE_NOT)
 125                 return;
 126
 127         if (!isPushable(other))
 128                 return;
 129
 130         if(self.team)
 131                 if(((self.spawnflags & 4) == 0) == (self.team != other.team))
 132                         return;
 133
 134         EXACTTRIGGER_TOUCH;
 135
 136         if(self.enemy)
 137         {
 138                 other.velocity = trigger_push_calculatevelocity(other.origin, self.enemy, self.height);
 139         }
 140         else if(self.target)
 141         {
 142                 entity e;
 143                 RandomSelection_Init();
 144                 for(e = world; (e = find(e, targetname, self.target)); )
 145                 {
 146                         if(e.cnt)
 147                                 RandomSelection_Add(e, 0, string_null, e.cnt, 1);
 148                         else
 149                                 RandomSelection_Add(e, 0, string_null, 1, 1);
 150                 }
 151                 other.velocity = trigger_push_calculatevelocity(other.origin, RandomSelection_chosen_ent, self.height);
 152         }
 153         else
 154         {
 155                 other.velocity = self.movedir;
 156         }
 157
 158         other.flags &= ~FL_ONGROUND;
 159
 160         if (IS_PLAYER(other))
 161         {
 162                 // reset tracking of oldvelocity for impact damage (sudden velocity changes)
 163                 other.oldvelocity = other.velocity;
 164
 165                 if(self.pushltime < time)  // prevent "snorring" sound when a player hits the jumppad more than once
 166                 {
 167                         // flash when activated
 168                         pointparticles(particleeffectnum("jumppad_activate"), other.origin, other.velocity, 1);
 169                         sound (other, CH_TRIGGER, self.noise, VOL_BASE, ATTEN_NORM);
 170                         self.pushltime = time + 0.2;
 171                 }
 172                 if(IS_REAL_CLIENT(other) || IS_BOT_CLIENT(other))
 173                 {
 174                         float i;
 175                         float found;
 176                         found = false;
 177                         for(i = 0; i < other.jumppadcount && i < NUM_JUMPPADSUSED; ++i)
 178                                 if(other.(jumppadsused[i]) == self)
 179                                         found = true;
 180                         if(!found)
 181                         {
 182                                 other.(jumppadsused[other.jumppadcount % NUM_JUMPPADSUSED]) = self;
 183                                 other.jumppadcount = other.jumppadcount + 1;
 184                         }
 185
 186                         if(IS_REAL_CLIENT(other))
 187                         {
 188                                 if(self.message)
 189                                         centerprint(other, self.message);
 190                         }
 191                         else
 192                                 other.lastteleporttime = time;
 193
 194                         if (other.deadflag == DEAD_NO)
 195                                 animdecide_setaction(other, ANIMACTION_JUMP, true);
 196                 }
 197                 else
 198                         other.jumppadcount = true;
 199
 200                 // reset tracking of who pushed you into a hazard (for kill credit)
 201                 other.pushltime = 0;
 202                 other.istypefrag = 0;
 203         }
 204
 205         if(self.enemy.target)
 206         {
 207                 entity oldself;
 208                 oldself = self;
 209                 activator = other;
 210                 self = self.enemy;
 211                 SUB_UseTargets();
 212                 self = oldself;
 213         }
 214
 215         if (other.flags & FL_PROJECTILE)
 216         {
 217                 other.angles = vectoangles (other.velocity);
 218                 switch(other.movetype)
 219                 {
 220                         case MOVETYPE_FLY:
 221                                 other.movetype = MOVETYPE_TOSS;
 222                                 other.gravity = 1;
 223                                 break;
 224                         case MOVETYPE_BOUNCEMISSILE:
 225                                 other.movetype = MOVETYPE_BOUNCE;
 226                                 other.gravity = 1;
 227                                 break;
 228                 }
 229                 UpdateCSQCProjectile(other);
 230         }
 231
 232         if (self.spawnflags & PUSH_ONCE)
 233         {
 234                 self.touch = func_null;
 235                 self.think = SUB_Remove;
 236                 self.nextthink = time;
 237         }
 238 }
 239
 240 void trigger_push_findtarget()
 241 {
 242         entity e, t;
 243         vector org;
 244
 245         // first calculate a typical start point for the jump
 246         org = (self.absmin + self.absmax) * 0.5;
 247         org_z = self.absmax.z - PL_MIN_z;
 248
 249         if (self.target)
 250         {
 251                 float n;
 252                 n = 0;
 253                 for(t = world; (t = find(t, targetname, self.target)); )
 254                 {
 255                         ++n;
 256                         e = spawn();
 257                         setorigin(e, org);
 258                         setsize(e, PL_MIN, PL_MAX);
 259                         e.velocity = trigger_push_calculatevelocity(org, t, self.height);
 260                         tracetoss(e, e);
 261                         if(e.movetype == MOVETYPE_NONE)
 262                                 waypoint_spawnforteleporter(self, trace_endpos, vlen(trace_endpos - org) / vlen(e.velocity));
 263                         remove(e);
 264                 }
 265
 266                 if(n == 0)
 267                 {
 268                         // no dest!
 269                         objerror ("Jumppad with nonexistant target");
 270                         return;
 271                 }
 272                 else if(n == 1)
 273                 {
 274                         // exactly one dest - bots love that
 275                         self.enemy = find(world, targetname, self.target);
 276                 }
 277                 else
 278                 {
 279                         // have to use random selection every single time
 280                         self.enemy = world;
 281                 }
 282         }
 283         else
 284         {
 285                 e = spawn();
 286                 setorigin(e, org);
 287                 setsize(e, PL_MIN, PL_MAX);
 288                 e.velocity = self.movedir;
 289                 tracetoss(e, e);
 290                 waypoint_spawnforteleporter(self, trace_endpos, vlen(trace_endpos - org) / vlen(e.velocity));
 291                 remove(e);
 292         }
 293 }
 294
 295 /*
 296  * ENTITY PARAMETERS:
 297  *
 298  *   target:  target of jump
 299  *   height:  the absolute value is the height of the highest point of the jump
 300  *            trajectory above the higher one of the player and the target.
 301  *            the sign indicates whether the highest point is INSIDE (positive)
 302  *            or OUTSIDE (negative) of the jump trajectory. General rule: use
 303  *            positive values for targets mounted on the floor, and use negative
 304  *            values to target a point on the ceiling.
 305  *   movedir: if target is not set, this * speed * 10 is the velocity to be reached.
 306  */
 307 void spawnfunc_trigger_push()
 308 {
 309         SetMovedir ();
 310
 311         EXACTTRIGGER_INIT;
 312
 313         self.active = ACTIVE_ACTIVE;
 314         self.use = trigger_push_use;
 315         self.touch = trigger_push_touch;
 316
 317         // normal push setup
 318         if (!self.speed)
 319                 self.speed = 1000;
 320         self.movedir = self.movedir * self.speed * 10;
 321
 322         if (!self.noise)
 323                 self.noise = "misc/jumppad.wav";
 324         precache_sound (self.noise);
 325
 326         // this must be called to spawn the teleport waypoints for bots
 327         InitializeEntity(self, trigger_push_findtarget, INITPRIO_FINDTARGET);
 328 }
 329
 330 void spawnfunc_target_push() {}
 331 void spawnfunc_info_notnull() {}
 332 void spawnfunc_target_position() {}