diff options
Diffstat (limited to 'source/blender/blenkernel/intern/object.c')
| -rw-r--r-- | source/blender/blenkernel/intern/object.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/source/blender/blenkernel/intern/object.c b/source/blender/blenkernel/intern/object.c index 4f901ba7216..125243bc56f 100644 --- a/source/blender/blenkernel/intern/object.c +++ b/source/blender/blenkernel/intern/object.c @@ -2380,3 +2380,31 @@ int give_obdata_texspace(Object *ob, int **texflag, float **loc, float **size, f } return 1; } + +/* + * Test a bounding box for ray intersection + * assumes the ray is already local to the boundbox space + */ +int ray_hit_boundbox(struct BoundBox *bb, float ray_start[3], float ray_normal[3]) +{ + static int triangle_indexes[12][3] = {{0, 1, 2}, {0, 2, 3}, + {3, 2, 6}, {3, 6, 7}, + {1, 2, 6}, {1, 6, 5}, + {5, 6, 7}, {4, 5, 7}, + {0, 3, 7}, {0, 4, 7}, + {0, 1, 5}, {0, 4, 5}}; + int result = 0; + int i; + + for (i = 0; i < 12 && result == 0; i++) + { + float lambda; + int v1, v2, v3; + v1 = triangle_indexes[i][0]; + v2 = triangle_indexes[i][1]; + v3 = triangle_indexes[i][2]; + result = RayIntersectsTriangle(ray_start, ray_normal, bb->vec[v1], bb->vec[v2], bb->vec[v3], &lambda, NULL); + } + + return result; +} |