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

   1
   2 /*
   3  * CS5600 University of Utah
   4  * Charles McGarvey
   5  * mcgarvey@eng.utah.edu
   6  */
   7
   8 #ifndef _AABB_H_
   9 #define _AABB_H_
  10
  11 #include "vec.h"
  12
  13
  14 /*
  15  * An axis-aligned bounding box.
  16  */
  17 struct aabb
  18 {
  19     vec_t min;
  20     vec_t max;
  21 };
  22 typedef struct aabb aabb_t;
  23
  24 /*
  25  * Initialize a axis-aligned bounding box.
  26  */
  27 INLINE_MAYBE
  28 void aabb_init(aabb_t* b, vec_t min, vec_t max)
  29 {
  30     b->min = min;
  31     b->max = max;
  32 }
  33
  34
  35 /*
  36  * Create a new axis-aligned bounding box.
  37  */
  38 INLINE_MAYBE
  39 aabb_t aabb_new(vec_t min, vec_t max)
  40 {
  41     aabb_t b;
  42     aabb_init(&b, min, max);
  43     return b;
  44 }
  45
  46 #define AABB_UNIT aabb_new(vec_new(S(-0.5), S(-0.5), S(-0.5)), \
  47                            vec_new(S( 0.5), S( 0.5), S( 0.5)))
  48
  49
  50 #endif // _AABB_H_
  51