world_volumes.h

   1 #ifndef WORLD_VOLUMES_H
   2 #define WORLD_VOLUMES_H
   3
   4 #include "world.h"
   5
   6 #if 0
   7 /*
   8  * BVH implementation
   9  * ----------------------------------------------------------------------------
  10  */
  11
  12 VG_STATIC void volume_vg_expand_bound( void *user, boxf bound, u32 item_index )
  13 {
  14    world_instance *world = user;
  15
  16    ent_volume *volume_array = world_ent_array( world, k_ent_volume ),
  17               *volume       = volume_array + item_index;
  18
  19    m4x3_expand_aabb_point( volume->transform, bound, (v3f){ 1.0f, 1.0f, 1.0f} );
  20    m4x3_expand_aabb_point( volume->transform, bound, (v3f){ 1.0f, 1.0f,-1.0f} );
  21    m4x3_expand_aabb_point( volume->transform, bound, (v3f){ 1.0f,-1.0f, 1.0f} );
  22    m4x3_expand_aabb_point( volume->transform, bound, (v3f){ 1.0f,-1.0f,-1.0f} );
  23    m4x3_expand_aabb_point( volume->transform, bound, (v3f){-1.0f, 1.0f, 1.0f} );
  24    m4x3_expand_aabb_point( volume->transform, bound, (v3f){-1.0f, 1.0f,-1.0f} );
  25    m4x3_expand_aabb_point( volume->transform, bound, (v3f){-1.0f,-1.0f, 1.0f} );
  26    m4x3_expand_aabb_point( volume->transform, bound, (v3f){-1.0f,-1.0f,-1.0f} );
  27 }
  28
  29 VG_STATIC float volume_vg_centroid( void *user, u32 item_index, int axis )
  30 {
  31    world_instance *world = user;
  32
  33    ent_volume *volume_array = world_ent_array( world, k_ent_volume ),
  34               *volume       = volume_array + item_index;
  35
  36    return volume->transform[3][axis];
  37 }
  38
  39 VG_STATIC void volume_vg_swap( void *user, u32 ia, u32 ib )
  40 {
  41    world_instance *world = user;
  42    ent_volume *volume_array = world_ent_array( world, k_ent_volume ),
  43               *a            = volume_array + ia,
  44               *b            = volume_array + ib,
  45               temp;
  46
  47    temp = *a;
  48    *a = *b;
  49    *b = temp;
  50 }
  51
  52 VG_STATIC void volume_vg_debug( void *user, u32 item_index )
  53 {
  54    world_instance *world = user;
  55    ent_volume *volume_array = world_ent_array( world, k_ent_volume ),
  56               *volume       = volume_array + item_index;
  57
  58    vg_line_boxf_transformed( volume->transform, (boxf){{-1.0f,-1.0f,-1.0f},
  59                                                        { 1.0f, 1.0f, 1.0f}},
  60                                                        0xff00ff00 );
  61 }
  62
  63 VG_STATIC bh_system bh_system_volumes =
  64 {
  65    .expand_bound = volume_vg_expand_bound,
  66    .item_centroid = volume_vg_centroid,
  67    .item_closest = NULL,
  68    .item_swap = volume_vg_swap,
  69    .item_debug = volume_vg_debug,
  70    .cast_ray = NULL
  71 };
  72 #endif
  73
  74 #endif /* WORLD_VOLUMES_H */