cl_light.c

   1 #include "quakedef.h"
   2
   3 dlight_t cl_dlights[MAX_DLIGHTS];
   4
   5 /*
   6 ===============
   7 CL_AllocDlight
   8
   9 ===============
  10 */
  11 void CL_AllocDlight (entity_render_t *ent, vec3_t org, float radius, float red, float green, float blue, float decay, float lifetime)
  12 {
  13         int             i;
  14         dlight_t        *dl;
  15
  16 // first look for an exact key match
  17         if (ent)
  18         {
  19                 dl = cl_dlights;
  20                 for (i = 0;i < MAX_DLIGHTS;i++, dl++)
  21                         if (dl->ent == ent)
  22                                 goto dlightsetup;
  23         }
  24
  25 // then look for anything else
  26         dl = cl_dlights;
  27         for (i = 0;i < MAX_DLIGHTS;i++, dl++)
  28                 if (!dl->radius)
  29                         goto dlightsetup;
  30
  31         // unable to find one
  32         return;
  33
  34 dlightsetup:
  35         memset (dl, 0, sizeof(*dl));
  36         dl->ent = ent;
  37         VectorCopy(org, dl->origin);
  38         dl->radius = radius;
  39         dl->color[0] = red;
  40         dl->color[1] = green;
  41         dl->color[2] = blue;
  42         dl->decay = decay;
  43         if (lifetime)
  44                 dl->die = cl.time + lifetime;
  45         else
  46                 dl->die = 0;
  47 }
  48
  49
  50 /*
  51 ===============
  52 CL_DecayLights
  53
  54 ===============
  55 */
  56 void CL_DecayLights (void)
  57 {
  58         int                     i;
  59         dlight_t        *dl;
  60         float           time;
  61
  62         time = cl.time - cl.oldtime;
  63
  64         dl = cl_dlights;
  65         for (i=0 ; i<MAX_DLIGHTS ; i++, dl++)
  66         {
  67                 if (!dl->radius)
  68                         continue;
  69                 if (dl->die < cl.time)
  70                 {
  71                         dl->radius = 0;
  72                         continue;
  73                 }
  74
  75                 dl->radius -= time*dl->decay;
  76                 if (dl->radius < 0)
  77                         dl->radius = 0;
  78         }
  79 }
  80
  81