qcsrc/common/mapobjects/trigger/gravity.qc

   1 #include "gravity.qh"
   2 #ifdef SVQC
   3 .entity trigger_gravity_check;
   4 void trigger_gravity_remove(entity own)
   5 {
   6         if(own.trigger_gravity_check.owner == own)
   7         {
   8                 UpdateCSQCProjectile(own);
   9                 own.gravity = own.trigger_gravity_check.gravity;
  10                 delete(own.trigger_gravity_check);
  11         }
  12         else
  13                 backtrace("Removing a trigger_gravity_check with no valid owner");
  14         own.trigger_gravity_check = NULL;
  15 }
  16 void trigger_gravity_check_think(entity this)
  17 {
  18         // This spawns when a player enters the gravity zone and checks if he left.
  19         // Each frame, this.count is set to 2 by trigger_gravity_touch() and decreased by 1 here.
  20         // It the player has left the gravity trigger, this will be allowed to reach 0 and indicate that.
  21         if(this.count <= 0)
  22         {
  23                 if(this.owner.trigger_gravity_check == this)
  24                         trigger_gravity_remove(this.owner);
  25                 else
  26                         delete(this);
  27                 return;
  28         }
  29         else
  30         {
  31                 this.count -= 1;
  32                 this.nextthink = time;
  33         }
  34 }
  35
  36 // legacy
  37 void trigger_gravity_use(entity this, entity actor, entity trigger)
  38 {
  39         this.setactive(this, ACTIVE_TOGGLE);
  40 }
  41
  42 void trigger_gravity_touch(entity this, entity toucher)
  43 {
  44         float g;
  45
  46         if(this.active == ACTIVE_NOT)
  47                 return;
  48
  49         EXACTTRIGGER_TOUCH(this, toucher);
  50
  51         g = this.gravity;
  52
  53         if (!(this.spawnflags & GRAVITY_STICKY))
  54         {
  55                 if(toucher.trigger_gravity_check)
  56                 {
  57                         if(this == toucher.trigger_gravity_check.enemy)
  58                         {
  59                                 // same?
  60                                 // NOTE: see explanation in trigger_gravity_check_think
  61                                 toucher.trigger_gravity_check.count = 2; // gravity one more frame...
  62                                 return;
  63                         }
  64
  65                         // compare prio
  66                         if(this.cnt > toucher.trigger_gravity_check.enemy.cnt)
  67                                 trigger_gravity_remove(toucher);
  68                         else
  69                                 return;
  70                 }
  71                 toucher.trigger_gravity_check = spawn();
  72                 toucher.trigger_gravity_check.enemy = this;
  73                 toucher.trigger_gravity_check.owner = toucher;
  74                 toucher.trigger_gravity_check.gravity = toucher.gravity;
  75                 setthink(toucher.trigger_gravity_check, trigger_gravity_check_think);
  76                 toucher.trigger_gravity_check.nextthink = time;
  77                 toucher.trigger_gravity_check.count = 2;
  78                 if(toucher.gravity)
  79                         g *= toucher.gravity;
  80         }
  81
  82         if (toucher.gravity != g)
  83         {
  84                 toucher.gravity = g;
  85                 if(this.noise != "")
  86                         _sound (toucher, CH_TRIGGER, this.noise, VOL_BASE, ATTEN_NORM);
  87                 UpdateCSQCProjectile(this.owner);
  88         }
  89 }
  90
  91 spawnfunc(trigger_gravity)
  92 {
  93         if(this.gravity == 1)
  94                 return;
  95
  96         EXACTTRIGGER_INIT;
  97         settouch(this, trigger_gravity_touch);
  98         if(this.noise != "")
  99                 precache_sound(this.noise);
 100
 101         this.active = ACTIVE_ACTIVE;
 102         this.setactive = generic_setactive;
 103         IFTARGETED
 104         {
 105                 // legacy use
 106                 this.use = trigger_gravity_use;
 107                 if(this.spawnflags & GRAVITY_START_DISABLED)
 108                         this.active = ACTIVE_NOT;
 109         }
 110 }
 111 #endif