Dogcows Code - chaz/rasterize/blob - light.h

   1
   2 /*
   3  * CS5600 University of Utah
   4  * Charles McGarvey
   5  * mcgarvey@eng.utah.edu
   6  */
   7
   8 #ifndef _LIGHT_H_
   9 #define _LIGHT_H_
  10
  11 #include "color.h"
  12 #include "vec.h"
  13
  14
  15 /*
  16  * A light source.
  17  */
  18 struct light
  19 {
  20     vec_t   v;  // position
  21     color_t d;  // diffuse
  22     color_t s;  // specular
  23 };
  24 typedef struct light light_t;
  25
  26 /*
  27  * Initialize a light with a position and color.
  28  */
  29 INLINE_MAYBE
  30 void light_init(light_t* l, vec_t position, color_t diffuse, color_t specular)
  31 {
  32     l->v = position;
  33     l->d = diffuse;
  34     l->s = specular;
  35 }
  36
  37
  38 /*
  39  * Create a new light with a position and color.
  40  */
  41 INLINE_MAYBE
  42 light_t light_new(vec_t position, color_t diffuse, color_t specular)
  43 {
  44     light_t l;
  45     light_init(&l, position, diffuse, specular);
  46     return l;
  47 }
  48
  49
  50 /*
  51  * Create a new light on the heap.
  52  */
  53 INLINE_MAYBE
  54 light_t* light_alloc(vec_t position, color_t diffuse, color_t specular)
  55 {
  56     light_t* l = (light_t*)mem_alloc(sizeof(light_t));
  57     light_init(l, position, diffuse, specular);
  58     return l;
  59 }
  60
  61 INLINE_MAYBE
  62 light_t* light_copy(light_t l)
  63 {
  64     light_t* n = (light_t*)mem_alloc(sizeof(light_t));
  65     memcpy(n, &l, sizeof(light_t));
  66     return n;
  67 }
  68
  69
  70 #endif // _LIGHT_H_
  71