cl_light.c

   1 #include "quakedef.h"
   2
   3 dlight_t cl_dlights[MAX_DLIGHTS];
   4
   5 void cl_light_start(void)
   6 {
   7 }
   8
   9 void cl_light_shutdown(void)
  10 {
  11 }
  12
  13 void cl_light_newmap(void)
  14 {
  15         memset (cl_dlights, 0, sizeof(cl_dlights));
  16 }
  17
  18 void CL_Light_Init(void)
  19 {
  20         R_RegisterModule("CL_Light", cl_light_start, cl_light_shutdown, cl_light_newmap);
  21 }
  22
  23 /*
  24 ===============
  25 CL_AllocDlight
  26
  27 ===============
  28 */
  29 void CL_AllocDlight (entity_render_t *ent, vec3_t org, float radius, float red, float green, float blue, float decay, float lifetime)
  30 {
  31         int             i;
  32         dlight_t        *dl;
  33
  34 // first look for an exact key match
  35         if (ent)
  36         {
  37                 dl = cl_dlights;
  38                 for (i = 0;i < MAX_DLIGHTS;i++, dl++)
  39                         if (dl->ent == ent)
  40                                 goto dlightsetup;
  41         }
  42
  43 // then look for anything else
  44         dl = cl_dlights;
  45         for (i = 0;i < MAX_DLIGHTS;i++, dl++)
  46                 if (!dl->radius)
  47                         goto dlightsetup;
  48
  49         // unable to find one
  50         return;
  51
  52 dlightsetup:
  53         memset (dl, 0, sizeof(*dl));
  54         dl->ent = ent;
  55         VectorCopy(org, dl->origin);
  56         dl->radius = radius;
  57         dl->color[0] = red;
  58         dl->color[1] = green;
  59         dl->color[2] = blue;
  60         dl->decay = decay;
  61         dl->die = cl.time + lifetime;
  62 }
  63
  64
  65 /*
  66 ===============
  67 CL_DecayLights
  68
  69 ===============
  70 */
  71 void CL_DecayLights (void)
  72 {
  73         int                     i;
  74         dlight_t        *dl;
  75         float           time;
  76
  77         time = cl.time - cl.oldtime;
  78
  79         c_dlights = 0;
  80         dl = cl_dlights;
  81         for (i=0 ; i<MAX_DLIGHTS ; i++, dl++)
  82         {
  83                 if (!dl->radius)
  84                         continue;
  85                 if (dl->die < cl.time)
  86                 {
  87                         dl->radius = 0;
  88                         continue;
  89                 }
  90
  91                 c_dlights++; // count every dlight in use
  92
  93                 dl->radius -= time*dl->decay;
  94                 if (dl->radius < 0)
  95                         dl->radius = 0;
  96         }
  97 }
  98
  99