cl_light.c

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