diff options
Diffstat (limited to 'source/blender/render/intern/raytrace/rayobject_internal.h')
| -rw-r--r-- | source/blender/render/intern/raytrace/rayobject_internal.h | 68 |
1 files changed, 34 insertions, 34 deletions
diff --git a/source/blender/render/intern/raytrace/rayobject_internal.h b/source/blender/render/intern/raytrace/rayobject_internal.h index 8e39b687b34..8c8e432b6bd 100644 --- a/source/blender/render/intern/raytrace/rayobject_internal.h +++ b/source/blender/render/intern/raytrace/rayobject_internal.h @@ -33,40 +33,40 @@ typedef struct RayObjectControl { int RE_rayobjectcontrol_test_break(RayObjectControl *c); /* RayObject - - A ray object is everything where we can cast rays like: - * a face/triangle - * an octree - * a bvh tree - * an octree of bvh's - * a bvh of bvh's - - - All types of RayObjects can be created by implementing the - callbacks of the RayObject. - - Due to high computing time evolved with casting on faces - there is a special type of RayObject (named RayFace) - which won't use callbacks like other generic nodes. - - In order to allow a mixture of RayFace+RayObjects, - all RayObjects must be 4byte aligned, allowing us to use the - 2 least significant bits (with the mask 0x03) to define the - type of RayObject. - - This leads to 4 possible types of RayObject: - - addr&3 - type of object - 0 Self (reserved for each structure) - 1 RayFace (tri/quad primitive) - 2 RayObject (generic with API callbacks) - 3 VlakPrimitive - (vlak primitive - to be used when we have a vlak describing the data - eg.: on render code) - - 0 means it's reserved and has it own meaning inside each ray acceleration structure - (this way each structure can use the allign offset to determine if a node represents a - RayObject primitive, which can be used to save memory) + * + * A ray object is everything where we can cast rays like: + * * a face/triangle + * * an octree + * * a bvh tree + * * an octree of bvh's + * * a bvh of bvh's + * + * + * All types of RayObjects can be created by implementing the + * callbacks of the RayObject. + * + * Due to high computing time evolved with casting on faces + * there is a special type of RayObject (named RayFace) + * which won't use callbacks like other generic nodes. + * + * In order to allow a mixture of RayFace+RayObjects, + * all RayObjects must be 4byte aligned, allowing us to use the + * 2 least significant bits (with the mask 0x03) to define the + * type of RayObject. + * + * This leads to 4 possible types of RayObject: + * + * addr&3 - type of object + * 0 Self (reserved for each structure) + * 1 RayFace (tri/quad primitive) + * 2 RayObject (generic with API callbacks) + * 3 VlakPrimitive + * (vlak primitive - to be used when we have a vlak describing the data + * eg.: on render code) + * + * 0 means it's reserved and has it own meaning inside each ray acceleration structure + * (this way each structure can use the allign offset to determine if a node represents a + * RayObject primitive, which can be used to save memory) */ /* used to test the type of ray object */ |