diff options
Diffstat (limited to 'source/blender/render/intern/raytrace/bvh.h')
-rw-r--r-- | source/blender/render/intern/raytrace/bvh.h | 62 |
1 files changed, 48 insertions, 14 deletions
diff --git a/source/blender/render/intern/raytrace/bvh.h b/source/blender/render/intern/raytrace/bvh.h index 133a3d4a005..dd23967297a 100644 --- a/source/blender/render/intern/raytrace/bvh.h +++ b/source/blender/render/intern/raytrace/bvh.h @@ -26,10 +26,16 @@ * * ***** END GPL LICENSE BLOCK ***** */ -#include "rayobject.h" + +#include "MEM_guardedalloc.h" + +#include "BLI_math.h" + #include "raycounter.h" -#include "rayobject_rtbuild.h" +#include "rayintersection.h" +#include "rayobject.h" #include "rayobject_hint.h" +#include "rayobject_rtbuild.h" #include <assert.h> @@ -43,21 +49,49 @@ #ifdef __SSE__ inline int test_bb_group4(__m128 *bb_group, const Isect *isec) { - const __m128 tmin0 = _mm_setzero_ps(); - const __m128 tmax0 = _mm_load1_ps(&isec->labda); - - const __m128 tmin1 = _mm_max_ps(tmin0, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[0]], _mm_load1_ps(&isec->start[0]) ), _mm_load1_ps(&isec->idot_axis[0])) ); - const __m128 tmax1 = _mm_min_ps(tmax0, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[1]], _mm_load1_ps(&isec->start[0]) ), _mm_load1_ps(&isec->idot_axis[0])) ); - const __m128 tmin2 = _mm_max_ps(tmin1, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[2]], _mm_load1_ps(&isec->start[1]) ), _mm_load1_ps(&isec->idot_axis[1])) ); - const __m128 tmax2 = _mm_min_ps(tmax1, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[3]], _mm_load1_ps(&isec->start[1]) ), _mm_load1_ps(&isec->idot_axis[1])) ); - const __m128 tmin3 = _mm_max_ps(tmin2, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[4]], _mm_load1_ps(&isec->start[2]) ), _mm_load1_ps(&isec->idot_axis[2])) ); - const __m128 tmax3 = _mm_min_ps(tmax2, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[5]], _mm_load1_ps(&isec->start[2]) ), _mm_load1_ps(&isec->idot_axis[2])) ); + const __m128 tmax0 = _mm_set_ps1(isec->dist); + + float start[3], idot_axis[3]; + copy_v3_v3(start, isec->start); + copy_v3_v3(idot_axis, isec->idot_axis); + + const __m128 tmin1 = _mm_max_ps(tmin0, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[0]], _mm_set_ps1(start[0]) ), _mm_set_ps1(idot_axis[0])) ); + const __m128 tmax1 = _mm_min_ps(tmax0, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[1]], _mm_set_ps1(start[0]) ), _mm_set_ps1(idot_axis[0])) ); + const __m128 tmin2 = _mm_max_ps(tmin1, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[2]], _mm_set_ps1(start[1]) ), _mm_set_ps1(idot_axis[1])) ); + const __m128 tmax2 = _mm_min_ps(tmax1, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[3]], _mm_set_ps1(start[1]) ), _mm_set_ps1(idot_axis[1])) ); + const __m128 tmin3 = _mm_max_ps(tmin2, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[4]], _mm_set_ps1(start[2]) ), _mm_set_ps1(idot_axis[2])) ); + const __m128 tmax3 = _mm_min_ps(tmax2, _mm_mul_ps( _mm_sub_ps( bb_group[isec->bv_index[5]], _mm_set_ps1(start[2]) ), _mm_set_ps1(idot_axis[2])) ); return _mm_movemask_ps(_mm_cmpge_ps(tmax3, tmin3)); } #endif +/* + * Determines the distance that the ray must travel to hit the bounding volume of the given node + * Based on Tactical Optimization of Ray/Box Intersection, by Graham Fyffe + * [http://tog.acm.org/resources/RTNews/html/rtnv21n1.html#art9] + */ +static int rayobject_bb_intersect_test(const Isect *isec, const float *_bb) +{ + const float *bb = _bb; + + float t1x = (bb[isec->bv_index[0]] - isec->start[0]) * isec->idot_axis[0]; + float t2x = (bb[isec->bv_index[1]] - isec->start[0]) * isec->idot_axis[0]; + float t1y = (bb[isec->bv_index[2]] - isec->start[1]) * isec->idot_axis[1]; + float t2y = (bb[isec->bv_index[3]] - isec->start[1]) * isec->idot_axis[1]; + float t1z = (bb[isec->bv_index[4]] - isec->start[2]) * isec->idot_axis[2]; + float t2z = (bb[isec->bv_index[5]] - isec->start[2]) * isec->idot_axis[2]; + + RE_RC_COUNT(isec->raycounter->bb.test); + + if(t1x > t2y || t2x < t1y || t1x > t2z || t2x < t1z || t1y > t2z || t2y < t1z) return 0; + if(t2x < 0.0 || t2y < 0.0 || t2z < 0.0) return 0; + if(t1x > isec->dist || t1y > isec->dist || t1z > isec->dist) return 0; + RE_RC_COUNT(isec->raycounter->bb.hit); + + return 1; +} /* bvh tree generics */ template<class Tree> static int bvh_intersect(Tree *obj, Isect *isec); @@ -106,7 +140,7 @@ static float bvh_cost(Tree *obj) /* bvh tree nodes generics */ template<class Node> static inline int bvh_node_hit_test(Node *node, Isect *isec) { - return RE_rayobject_bb_intersect_test(isec, (const float*)node->bb); + return rayobject_bb_intersect_test(isec, (const float*)node->bb); } @@ -131,7 +165,7 @@ static inline void bvh_node_merge_bb(Node *node, float *min, float *max) */ template<class Node> static inline void bvh_node_push_childs(Node *node, Isect *isec, Node **stack, int &stack_pos); -template<class Node,int MAX_STACK_SIZE,bool TEST_ROOT> +template<class Node,int MAX_STACK_SIZE,bool TEST_ROOT,bool SHADOW> static int bvh_node_stack_raycast(Node *root, Isect *isec) { Node *stack[MAX_STACK_SIZE]; @@ -156,7 +190,7 @@ static int bvh_node_stack_raycast(Node *root, Isect *isec) else { hit |= RE_rayobject_intersect( (RayObject*)node, isec); - if(hit && isec->mode == RE_RAY_SHADOW) return hit; + if(SHADOW && hit) return hit; } } return hit; |