diff options
Diffstat (limited to 'intern/cycles/kernel/geom/geom_qbvh_traversal.h')
-rw-r--r-- | intern/cycles/kernel/geom/geom_qbvh_traversal.h | 412 |
1 files changed, 0 insertions, 412 deletions
diff --git a/intern/cycles/kernel/geom/geom_qbvh_traversal.h b/intern/cycles/kernel/geom/geom_qbvh_traversal.h deleted file mode 100644 index 738d08ac6fc..00000000000 --- a/intern/cycles/kernel/geom/geom_qbvh_traversal.h +++ /dev/null @@ -1,412 +0,0 @@ -/* - * Adapted from code Copyright 2009-2010 NVIDIA Corporation, - * and code copyright 2009-2012 Intel Corporation - * - * Modifications Copyright 2011-2014, Blender Foundation. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -/* This is a template BVH traversal function, where various features can be - * enabled/disabled. This way we can compile optimized versions for each case - * without new features slowing things down. - * - * BVH_INSTANCING: object instancing - * BVH_HAIR: hair curve rendering - * BVH_HAIR_MINIMUM_WIDTH: hair curve rendering with minimum width - * BVH_MOTION: motion blur rendering - * - */ - -ccl_device bool BVH_FUNCTION_FULL_NAME(QBVH)(KernelGlobals *kg, - const Ray *ray, - Intersection *isect, - const uint visibility -#if BVH_FEATURE(BVH_HAIR_MINIMUM_WIDTH) - ,uint *lcg_state, - float difl, - float extmax -#endif - ) -{ - /* TODO(sergey): - * - Test if pushing distance on the stack helps (for non shadow rays). - * - Separate version for shadow rays. - * - Likely and unlikely for if() statements. - * - Test restrict attribute for pointers. - */ - - /* Traversal stack in CUDA thread-local memory. */ - QBVHStackItem traversalStack[BVH_QSTACK_SIZE]; - traversalStack[0].addr = ENTRYPOINT_SENTINEL; - traversalStack[0].dist = -FLT_MAX; - - /* Traversal variables in registers. */ - int stackPtr = 0; - int nodeAddr = kernel_data.bvh.root; - float nodeDist = -FLT_MAX; - - /* Ray parameters in registers. */ - float3 P = ray->P; - float3 dir = bvh_clamp_direction(ray->D); - float3 idir = bvh_inverse_direction(dir); - int object = OBJECT_NONE; - -#if BVH_FEATURE(BVH_MOTION) - Transform ob_itfm; -#endif - -#ifndef __KERNEL_SSE41__ - if(!isfinite(P.x)) { - return false; - } -#endif - - isect->t = ray->t; - isect->u = 0.0f; - isect->v = 0.0f; - isect->prim = PRIM_NONE; - isect->object = OBJECT_NONE; - - BVH_DEBUG_INIT(); - - ssef tnear(0.0f), tfar(ray->t); - sse3f idir4(ssef(idir.x), ssef(idir.y), ssef(idir.z)); - -#ifdef __KERNEL_AVX2__ - float3 P_idir = P*idir; - sse3f P_idir4 = sse3f(P_idir.x, P_idir.y, P_idir.z); -#else - sse3f org = sse3f(ssef(P.x), ssef(P.y), ssef(P.z)); -#endif - - /* Offsets to select the side that becomes the lower or upper bound. */ - int near_x, near_y, near_z; - int far_x, far_y, far_z; - - if(idir.x >= 0.0f) { near_x = 0; far_x = 1; } else { near_x = 1; far_x = 0; } - if(idir.y >= 0.0f) { near_y = 2; far_y = 3; } else { near_y = 3; far_y = 2; } - if(idir.z >= 0.0f) { near_z = 4; far_z = 5; } else { near_z = 5; far_z = 4; } - - IsectPrecalc isect_precalc; - triangle_intersect_precalc(dir, &isect_precalc); - - /* Traversal loop. */ - do { - do { - /* Traverse internal nodes. */ - while(nodeAddr >= 0 && nodeAddr != ENTRYPOINT_SENTINEL) { - if(UNLIKELY(nodeDist > isect->t)) { - /* Pop. */ - nodeAddr = traversalStack[stackPtr].addr; - nodeDist = traversalStack[stackPtr].dist; - --stackPtr; - continue; - } - - int traverseChild; - ssef dist; - - BVH_DEBUG_NEXT_STEP(); - -#if BVH_FEATURE(BVH_HAIR_MINIMUM_WIDTH) - if(difl != 0.0f) { - /* NOTE: We extend all the child BB instead of fetching - * and checking visibility flags for each of the, - * - * Need to test if doing opposite would be any faster. - */ - traverseChild = qbvh_node_intersect_robust(kg, - tnear, - tfar, -# ifdef __KERNEL_AVX2__ - P_idir4, -# else - org, -# endif - idir4, - near_x, near_y, near_z, - far_x, far_y, far_z, - nodeAddr, - difl, - &dist); - } - else -#endif /* BVH_HAIR_MINIMUM_WIDTH */ - { - traverseChild = qbvh_node_intersect(kg, - tnear, - tfar, -#ifdef __KERNEL_AVX2__ - P_idir4, -#else - org, -#endif - idir4, - near_x, near_y, near_z, - far_x, far_y, far_z, - nodeAddr, - &dist); - } - - if(traverseChild != 0) { - float4 cnodes = kernel_tex_fetch(__bvh_nodes, nodeAddr*BVH_QNODE_SIZE+6); - - /* One child is hit, continue with that child. */ - int r = __bscf(traverseChild); - float d0 = ((float*)&dist)[r]; - if(traverseChild == 0) { - nodeAddr = __float_as_int(cnodes[r]); - nodeDist = d0; - continue; - } - - /* Two children are hit, push far child, and continue with - * closer child. - */ - int c0 = __float_as_int(cnodes[r]); - r = __bscf(traverseChild); - int c1 = __float_as_int(cnodes[r]); - float d1 = ((float*)&dist)[r]; - if(traverseChild == 0) { - if(d1 < d0) { - nodeAddr = c1; - nodeDist = d1; - ++stackPtr; - kernel_assert(stackPtr < BVH_QSTACK_SIZE); - traversalStack[stackPtr].addr = c0; - traversalStack[stackPtr].dist = d0; - continue; - } - else { - nodeAddr = c0; - nodeDist = d0; - ++stackPtr; - kernel_assert(stackPtr < BVH_QSTACK_SIZE); - traversalStack[stackPtr].addr = c1; - traversalStack[stackPtr].dist = d1; - continue; - } - } - - /* Here starts the slow path for 3 or 4 hit children. We push - * all nodes onto the stack to sort them there. - */ - ++stackPtr; - kernel_assert(stackPtr < BVH_QSTACK_SIZE); - traversalStack[stackPtr].addr = c1; - traversalStack[stackPtr].dist = d1; - ++stackPtr; - kernel_assert(stackPtr < BVH_QSTACK_SIZE); - traversalStack[stackPtr].addr = c0; - traversalStack[stackPtr].dist = d0; - - /* Three children are hit, push all onto stack and sort 3 - * stack items, continue with closest child. - */ - r = __bscf(traverseChild); - int c2 = __float_as_int(cnodes[r]); - float d2 = ((float*)&dist)[r]; - if(traverseChild == 0) { - ++stackPtr; - kernel_assert(stackPtr < BVH_QSTACK_SIZE); - traversalStack[stackPtr].addr = c2; - traversalStack[stackPtr].dist = d2; - qbvh_stack_sort(&traversalStack[stackPtr], - &traversalStack[stackPtr - 1], - &traversalStack[stackPtr - 2]); - nodeAddr = traversalStack[stackPtr].addr; - nodeDist = traversalStack[stackPtr].dist; - --stackPtr; - continue; - } - - /* Four children are hit, push all onto stack and sort 4 - * stack items, continue with closest child. - */ - r = __bscf(traverseChild); - int c3 = __float_as_int(cnodes[r]); - float d3 = ((float*)&dist)[r]; - ++stackPtr; - kernel_assert(stackPtr < BVH_QSTACK_SIZE); - traversalStack[stackPtr].addr = c3; - traversalStack[stackPtr].dist = d3; - ++stackPtr; - kernel_assert(stackPtr < BVH_QSTACK_SIZE); - traversalStack[stackPtr].addr = c2; - traversalStack[stackPtr].dist = d2; - qbvh_stack_sort(&traversalStack[stackPtr], - &traversalStack[stackPtr - 1], - &traversalStack[stackPtr - 2], - &traversalStack[stackPtr - 3]); - } - - nodeAddr = traversalStack[stackPtr].addr; - nodeDist = traversalStack[stackPtr].dist; - --stackPtr; - } - - /* If node is leaf, fetch triangle list. */ - if(nodeAddr < 0) { - float4 leaf = kernel_tex_fetch(__bvh_leaf_nodes, (-nodeAddr-1)*BVH_QNODE_LEAF_SIZE); - -#ifdef __VISIBILITY_FLAG__ - if(UNLIKELY((nodeDist > isect->t) || ((__float_as_uint(leaf.z) & visibility) == 0))) -#else - if(UNLIKELY((nodeDist > isect->t))) -#endif - { - /* Pop. */ - nodeAddr = traversalStack[stackPtr].addr; - nodeDist = traversalStack[stackPtr].dist; - --stackPtr; - continue; - } - - int primAddr = __float_as_int(leaf.x); - -#if BVH_FEATURE(BVH_INSTANCING) - if(primAddr >= 0) { -#endif - int primAddr2 = __float_as_int(leaf.y); - const uint type = __float_as_int(leaf.w); - - /* Pop. */ - nodeAddr = traversalStack[stackPtr].addr; - nodeDist = traversalStack[stackPtr].dist; - --stackPtr; - - /* Primitive intersection. */ - switch(type & PRIMITIVE_ALL) { - case PRIMITIVE_TRIANGLE: { - for(; primAddr < primAddr2; primAddr++) { - BVH_DEBUG_NEXT_STEP(); - kernel_assert(kernel_tex_fetch(__prim_type, primAddr) == type); - if(triangle_intersect(kg, &isect_precalc, isect, P, visibility, object, primAddr)) { - tfar = ssef(isect->t); - /* Shadow ray early termination. */ - if(visibility == PATH_RAY_SHADOW_OPAQUE) - return true; - } - } - break; - } -#if BVH_FEATURE(BVH_MOTION) - case PRIMITIVE_MOTION_TRIANGLE: { - for(; primAddr < primAddr2; primAddr++) { - BVH_DEBUG_NEXT_STEP(); - kernel_assert(kernel_tex_fetch(__prim_type, primAddr) == type); - if(motion_triangle_intersect(kg, isect, P, dir, ray->time, visibility, object, primAddr)) { - tfar = ssef(isect->t); - /* Shadow ray early termination. */ - if(visibility == PATH_RAY_SHADOW_OPAQUE) - return true; - } - } - break; - } -#endif /* BVH_FEATURE(BVH_MOTION) */ -#if BVH_FEATURE(BVH_HAIR) - case PRIMITIVE_CURVE: - case PRIMITIVE_MOTION_CURVE: { - for(; primAddr < primAddr2; primAddr++) { - BVH_DEBUG_NEXT_STEP(); - kernel_assert(kernel_tex_fetch(__prim_type, primAddr) == type); - bool hit; - if(kernel_data.curve.curveflags & CURVE_KN_INTERPOLATE) - hit = bvh_cardinal_curve_intersect(kg, isect, P, dir, visibility, object, primAddr, ray->time, type, lcg_state, difl, extmax); - else - hit = bvh_curve_intersect(kg, isect, P, dir, visibility, object, primAddr, ray->time, type, lcg_state, difl, extmax); - if(hit) { - tfar = ssef(isect->t); - /* Shadow ray early termination. */ - if(visibility == PATH_RAY_SHADOW_OPAQUE) - return true; - } - } - break; - } -#endif /* BVH_FEATURE(BVH_HAIR) */ - } - } -#if BVH_FEATURE(BVH_INSTANCING) - else { - /* Instance push. */ - object = kernel_tex_fetch(__prim_object, -primAddr-1); - -# if BVH_FEATURE(BVH_MOTION) - qbvh_instance_motion_push(kg, object, ray, &P, &dir, &idir, &isect->t, &nodeDist, &ob_itfm); -# else - qbvh_instance_push(kg, object, ray, &P, &dir, &idir, &isect->t, &nodeDist); -# endif - - if(idir.x >= 0.0f) { near_x = 0; far_x = 1; } else { near_x = 1; far_x = 0; } - if(idir.y >= 0.0f) { near_y = 2; far_y = 3; } else { near_y = 3; far_y = 2; } - if(idir.z >= 0.0f) { near_z = 4; far_z = 5; } else { near_z = 5; far_z = 4; } - tfar = ssef(isect->t); - idir4 = sse3f(ssef(idir.x), ssef(idir.y), ssef(idir.z)); -# ifdef __KERNEL_AVX2__ - P_idir = P*idir; - P_idir4 = sse3f(P_idir.x, P_idir.y, P_idir.z); -# else - org = sse3f(ssef(P.x), ssef(P.y), ssef(P.z)); -# endif - triangle_intersect_precalc(dir, &isect_precalc); - - ++stackPtr; - kernel_assert(stackPtr < BVH_QSTACK_SIZE); - traversalStack[stackPtr].addr = ENTRYPOINT_SENTINEL; - traversalStack[stackPtr].dist = -FLT_MAX; - - nodeAddr = kernel_tex_fetch(__object_node, object); - - BVH_DEBUG_NEXT_INSTANCE(); - } - } -#endif /* FEATURE(BVH_INSTANCING) */ - } while(nodeAddr != ENTRYPOINT_SENTINEL); - -#if BVH_FEATURE(BVH_INSTANCING) - if(stackPtr >= 0) { - kernel_assert(object != OBJECT_NONE); - - /* Instance pop. */ -# if BVH_FEATURE(BVH_MOTION) - bvh_instance_motion_pop(kg, object, ray, &P, &dir, &idir, &isect->t, &ob_itfm); -# else - bvh_instance_pop(kg, object, ray, &P, &dir, &idir, &isect->t); -# endif - - if(idir.x >= 0.0f) { near_x = 0; far_x = 1; } else { near_x = 1; far_x = 0; } - if(idir.y >= 0.0f) { near_y = 2; far_y = 3; } else { near_y = 3; far_y = 2; } - if(idir.z >= 0.0f) { near_z = 4; far_z = 5; } else { near_z = 5; far_z = 4; } - tfar = ssef(isect->t); - idir4 = sse3f(ssef(idir.x), ssef(idir.y), ssef(idir.z)); -# ifdef __KERNEL_AVX2__ - P_idir = P*idir; - P_idir4 = sse3f(P_idir.x, P_idir.y, P_idir.z); -# else - org = sse3f(ssef(P.x), ssef(P.y), ssef(P.z)); -# endif - triangle_intersect_precalc(dir, &isect_precalc); - - object = OBJECT_NONE; - nodeAddr = traversalStack[stackPtr].addr; - nodeDist = traversalStack[stackPtr].dist; - --stackPtr; - } -#endif /* FEATURE(BVH_INSTANCING) */ - } while(nodeAddr != ENTRYPOINT_SENTINEL); - - return (isect->prim != PRIM_NONE); -} |