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

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