cl_light.c

   1
   2 #include "quakedef.h"
   3
   4 /*
   5 ===============
   6 CL_AllocDlight
   7
   8 ===============
   9 */
  10 void CL_AllocDlight (entity_render_t *ent, vec3_t org, float radius, float red, float green, float blue, float decay, float lifetime)
  11 {
  12         int             i;
  13         dlight_t        *dl;
  14
  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
  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         //Con_Printf("dlight %i : %f %f %f : %f %f %f\n", i, org[0], org[1], org[2], red * radius, green * radius, blue * radius);
  37         memset (dl, 0, sizeof(*dl));
  38         //dl->ent = ent;
  39         VectorCopy(org, dl->origin);
  40         dl->radius = radius;
  41         dl->color[0] = red;
  42         dl->color[1] = green;
  43         dl->color[2] = blue;
  44         dl->decay = decay;
  45         if (lifetime)
  46                 dl->die = cl.time + lifetime;
  47         else
  48                 dl->die = 0;
  49 }
  50
  51
  52 /*
  53 ===============
  54 CL_DecayLights
  55
  56 ===============
  57 */
  58 void CL_DecayLights (void)
  59 {
  60         int                     i;
  61         dlight_t        *dl;
  62         float           time;
  63
  64         time = cl.time - cl.oldtime;
  65
  66         dl = cl_dlights;
  67         for (i=0 ; i<MAX_DLIGHTS ; i++, dl++)
  68         {
  69                 if (!dl->radius)
  70                         continue;
  71                 if (dl->die < cl.time)
  72                 {
  73                         dl->radius = 0;
  74                         continue;
  75                 }
  76
  77                 dl->radius -= time*dl->decay;
  78                 if (dl->radius < 0)
  79                         dl->radius = 0;
  80         }
  81 }
  82