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author | Sergey Sharybin <sergey.vfx@gmail.com> | 2018-08-29 17:09:59 +0300 |
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committer | Sergey Sharybin <sergey.vfx@gmail.com> | 2018-08-29 17:09:59 +0300 |
commit | 31278eb4bcc73f95b5032d65ababf32812074c5c (patch) | |
tree | 5422141293391de231224143fb75dd0144fb78e3 /intern/cycles/kernel/bvh/obvh_local.h | |
parent | e81c352746483acb50fbeddbba4249cdcb51d952 (diff) | |
parent | b2c707747da9f930a05499e98874c35d9aee7193 (diff) |
Merge branch 'master' into blender2.8
Diffstat (limited to 'intern/cycles/kernel/bvh/obvh_local.h')
-rw-r--r-- | intern/cycles/kernel/bvh/obvh_local.h | 409 |
1 files changed, 409 insertions, 0 deletions
diff --git a/intern/cycles/kernel/bvh/obvh_local.h b/intern/cycles/kernel/bvh/obvh_local.h new file mode 100644 index 00000000000..50bcfa79b6c --- /dev/null +++ b/intern/cycles/kernel/bvh/obvh_local.h @@ -0,0 +1,409 @@ +/* + * Copyright 2011-2013 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 for subsurface scattering, where + * various features can be enabled/disabled. This way we can compile optimized + * versions for each case without new features slowing things down. + * + * BVH_MOTION: motion blur rendering + * + */ + +#if BVH_FEATURE(BVH_HAIR) +# define NODE_INTERSECT obvh_node_intersect +#else +# define NODE_INTERSECT obvh_aligned_node_intersect +#endif + +ccl_device bool BVH_FUNCTION_FULL_NAME(OBVH)(KernelGlobals *kg, + const Ray *ray, + LocalIntersection *local_isect, + int local_object, + uint *lcg_state, + int max_hits) +{ + /* Traversal stack in CUDA thread-local memory. */ + OBVHStackItem traversal_stack[BVH_OSTACK_SIZE]; + traversal_stack[0].addr = ENTRYPOINT_SENTINEL; + + /* Traversal variables in registers. */ + int stack_ptr = 0; + int node_addr = kernel_tex_fetch(__object_node, local_object); + + /* 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; + float isect_t = ray->t; + + local_isect->num_hits = 0; + + const int object_flag = kernel_tex_fetch(__object_flag, local_object); + if(!(object_flag & SD_OBJECT_TRANSFORM_APPLIED)) { +#if BVH_FEATURE(BVH_MOTION) + Transform ob_itfm; + isect_t = bvh_instance_motion_push(kg, + local_object, + ray, + &P, + &dir, + &idir, + isect_t, + &ob_itfm); +#else + isect_t = bvh_instance_push(kg, local_object, ray, &P, &dir, &idir, isect_t); +#endif + object = local_object; + } + +#ifndef __KERNEL_SSE41__ + if(!isfinite(P.x)) { + return false; + } +#endif + + avxf tnear(0.0f), tfar(isect_t); +#if BVH_FEATURE(BVH_HAIR) + avx3f dir4(avxf(dir.x), avxf(dir.y), avxf(dir.z)); +#endif + avx3f idir4(avxf(idir.x), avxf(idir.y), avxf(idir.z)); + +#ifdef __KERNEL_AVX2__ + float3 P_idir = P*idir; + avx3f P_idir4(P_idir.x, P_idir.y, P_idir.z); +#endif +#if BVH_FEATURE(BVH_HAIR) || !defined(__KERNEL_AVX2__) + avx3f org4(avxf(P.x), avxf(P.y), avxf(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; + obvh_near_far_idx_calc(idir, + &near_x, &near_y, &near_z, + &far_x, &far_y, &far_z); + + /* Traversal loop. */ + do { + do { + /* Traverse internal nodes. */ + while(node_addr >= 0 && node_addr != ENTRYPOINT_SENTINEL) { + avxf dist; + int child_mask = NODE_INTERSECT(kg, + tnear, + tfar, +#ifdef __KERNEL_AVX2__ + P_idir4, +#endif +#if BVH_FEATURE(BVH_HAIR) || !defined(__KERNEL_AVX2__) + org4, +#endif +#if BVH_FEATURE(BVH_HAIR) + dir4, +#endif + idir4, + near_x, near_y, near_z, + far_x, far_y, far_z, + node_addr, + &dist); + + if(child_mask != 0) { + float4 inodes = kernel_tex_fetch(__bvh_nodes, node_addr+0); + avxf cnodes; +#if BVH_FEATURE(BVH_HAIR) + if(__float_as_uint(inodes.x) & PATH_RAY_NODE_UNALIGNED) { + cnodes = kernel_tex_fetch_avxf(__bvh_nodes, node_addr+26); + } + else +#endif + { + cnodes = kernel_tex_fetch_avxf(__bvh_nodes, node_addr+14); + } + + /* One child is hit, continue with that child. */ + int r = __bscf(child_mask); + if(child_mask == 0) { + node_addr = __float_as_int(cnodes[r]); + continue; + } + + /* Two children are hit, push far child, and continue with + * closer child. + */ + int c0 = __float_as_int(cnodes[r]); + float d0 = ((float*)&dist)[r]; + r = __bscf(child_mask); + int c1 = __float_as_int(cnodes[r]); + float d1 = ((float*)&dist)[r]; + if(child_mask == 0) { + if(d1 < d0) { + node_addr = c1; + ++stack_ptr; + kernel_assert(stack_ptr < BVH_OSTACK_SIZE); + traversal_stack[stack_ptr].addr = c0; + traversal_stack[stack_ptr].dist = d0; + continue; + } + else { + node_addr = c0; + ++stack_ptr; + kernel_assert(stack_ptr < BVH_OSTACK_SIZE); + traversal_stack[stack_ptr].addr = c1; + traversal_stack[stack_ptr].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. + */ + ++stack_ptr; + kernel_assert(stack_ptr < BVH_OSTACK_SIZE); + traversal_stack[stack_ptr].addr = c1; + traversal_stack[stack_ptr].dist = d1; + ++stack_ptr; + kernel_assert(stack_ptr < BVH_OSTACK_SIZE); + traversal_stack[stack_ptr].addr = c0; + traversal_stack[stack_ptr].dist = d0; + + /* Three children are hit, push all onto stack and sort 3 + * stack items, continue with closest child. + */ + r = __bscf(child_mask); + int c2 = __float_as_int(cnodes[r]); + float d2 = ((float*)&dist)[r]; + if(child_mask == 0) { + ++stack_ptr; + kernel_assert(stack_ptr < BVH_OSTACK_SIZE); + traversal_stack[stack_ptr].addr = c2; + traversal_stack[stack_ptr].dist = d2; + obvh_stack_sort(&traversal_stack[stack_ptr], + &traversal_stack[stack_ptr - 1], + &traversal_stack[stack_ptr - 2]); + node_addr = traversal_stack[stack_ptr].addr; + --stack_ptr; + continue; + } + + /* Four children are hit, push all onto stack and sort 4 + * stack items, continue with closest child. + */ + r = __bscf(child_mask); + int c3 = __float_as_int(cnodes[r]); + float d3 = ((float*)&dist)[r]; + if(child_mask == 0) { + ++stack_ptr; + kernel_assert(stack_ptr < BVH_OSTACK_SIZE); + traversal_stack[stack_ptr].addr = c3; + traversal_stack[stack_ptr].dist = d3; + ++stack_ptr; + kernel_assert(stack_ptr < BVH_OSTACK_SIZE); + traversal_stack[stack_ptr].addr = c2; + traversal_stack[stack_ptr].dist = d2; + obvh_stack_sort(&traversal_stack[stack_ptr], + &traversal_stack[stack_ptr - 1], + &traversal_stack[stack_ptr - 2], + &traversal_stack[stack_ptr - 3]); + node_addr = traversal_stack[stack_ptr].addr; + --stack_ptr; + continue; + } + + ++stack_ptr; + kernel_assert(stack_ptr < BVH_OSTACK_SIZE); + traversal_stack[stack_ptr].addr = c3; + traversal_stack[stack_ptr].dist = d3; + ++stack_ptr; + kernel_assert(stack_ptr < BVH_OSTACK_SIZE); + traversal_stack[stack_ptr].addr = c2; + traversal_stack[stack_ptr].dist = d2; + + /* Five children are hit, push all onto stack and sort 5 + * stack items, continue with closest child + */ + r = __bscf(child_mask); + int c4 = __float_as_int(cnodes[r]); + float d4 = ((float*)&dist)[r]; + if(child_mask == 0) { + ++stack_ptr; + kernel_assert(stack_ptr < BVH_OSTACK_SIZE); + traversal_stack[stack_ptr].addr = c4; + traversal_stack[stack_ptr].dist = d4; + obvh_stack_sort(&traversal_stack[stack_ptr], + &traversal_stack[stack_ptr - 1], + &traversal_stack[stack_ptr - 2], + &traversal_stack[stack_ptr - 3], + &traversal_stack[stack_ptr - 4]); + node_addr = traversal_stack[stack_ptr].addr; + --stack_ptr; + continue; + } + /* Six children are hit, push all onto stack and sort 6 + * stack items, continue with closest child. + */ + r = __bscf(child_mask); + int c5 = __float_as_int(cnodes[r]); + float d5 = ((float*)&dist)[r]; + if(child_mask == 0) { + ++stack_ptr; + kernel_assert(stack_ptr < BVH_OSTACK_SIZE); + traversal_stack[stack_ptr].addr = c5; + traversal_stack[stack_ptr].dist = d5; + ++stack_ptr; + kernel_assert(stack_ptr < BVH_OSTACK_SIZE); + traversal_stack[stack_ptr].addr = c4; + traversal_stack[stack_ptr].dist = d4; + obvh_stack_sort(&traversal_stack[stack_ptr], + &traversal_stack[stack_ptr - 1], + &traversal_stack[stack_ptr - 2], + &traversal_stack[stack_ptr - 3], + &traversal_stack[stack_ptr - 4], + &traversal_stack[stack_ptr - 5]); + node_addr = traversal_stack[stack_ptr].addr; + --stack_ptr; + continue; + } + + ++stack_ptr; + kernel_assert(stack_ptr < BVH_OSTACK_SIZE); + traversal_stack[stack_ptr].addr = c5; + traversal_stack[stack_ptr].dist = d5; + ++stack_ptr; + kernel_assert(stack_ptr < BVH_OSTACK_SIZE); + traversal_stack[stack_ptr].addr = c4; + traversal_stack[stack_ptr].dist = d4; + + /* Seven children are hit, push all onto stack and sort 7 + * stack items, continue with closest child. + */ + r = __bscf(child_mask); + int c6 = __float_as_int(cnodes[r]); + float d6 = ((float*)&dist)[r]; + if(child_mask == 0) { + ++stack_ptr; + kernel_assert(stack_ptr < BVH_OSTACK_SIZE); + traversal_stack[stack_ptr].addr = c6; + traversal_stack[stack_ptr].dist = d6; + obvh_stack_sort(&traversal_stack[stack_ptr], + &traversal_stack[stack_ptr - 1], + &traversal_stack[stack_ptr - 2], + &traversal_stack[stack_ptr - 3], + &traversal_stack[stack_ptr - 4], + &traversal_stack[stack_ptr - 5], + &traversal_stack[stack_ptr - 6]); + node_addr = traversal_stack[stack_ptr].addr; + --stack_ptr; + continue; + } + /* Eight children are hit, push all onto stack and sort 8 + * stack items, continue with closest child. + */ + r = __bscf(child_mask); + int c7 = __float_as_int(cnodes[r]); + float d7 = ((float*)&dist)[r]; + ++stack_ptr; + kernel_assert(stack_ptr < BVH_OSTACK_SIZE); + traversal_stack[stack_ptr].addr = c7; + traversal_stack[stack_ptr].dist = d7; + ++stack_ptr; + kernel_assert(stack_ptr < BVH_OSTACK_SIZE); + traversal_stack[stack_ptr].addr = c6; + traversal_stack[stack_ptr].dist = d6; + obvh_stack_sort(&traversal_stack[stack_ptr], + &traversal_stack[stack_ptr - 1], + &traversal_stack[stack_ptr - 2], + &traversal_stack[stack_ptr - 3], + &traversal_stack[stack_ptr - 4], + &traversal_stack[stack_ptr - 5], + &traversal_stack[stack_ptr - 6], + &traversal_stack[stack_ptr - 7]); + node_addr = traversal_stack[stack_ptr].addr; + --stack_ptr; + continue; + } + + node_addr = traversal_stack[stack_ptr].addr; + --stack_ptr; + } + + /* If node is leaf, fetch triangle list. */ + if(node_addr < 0) { + float4 leaf = kernel_tex_fetch(__bvh_leaf_nodes, (-node_addr-1)); + int prim_addr = __float_as_int(leaf.x); + + int prim_addr2 = __float_as_int(leaf.y); + const uint type = __float_as_int(leaf.w); + + /* Pop. */ + node_addr = traversal_stack[stack_ptr].addr; + --stack_ptr; + + /* Primitive intersection. */ + switch(type & PRIMITIVE_ALL) { + case PRIMITIVE_TRIANGLE: { + /* Intersect ray against primitive, */ + for(; prim_addr < prim_addr2; prim_addr++) { + kernel_assert(kernel_tex_fetch(__prim_type, prim_addr) == type); + if(triangle_intersect_local(kg, + local_isect, + P, + dir, + object, + local_object, + prim_addr, + isect_t, + lcg_state, + max_hits)) + { + return true; + } + } + break; + } +#if BVH_FEATURE(BVH_MOTION) + case PRIMITIVE_MOTION_TRIANGLE: { + /* Intersect ray against primitive. */ + for(; prim_addr < prim_addr2; prim_addr++) { + kernel_assert(kernel_tex_fetch(__prim_type, prim_addr) == type); + if(motion_triangle_intersect_local(kg, + local_isect, + P, + dir, + ray->time, + object, + local_object, + prim_addr, + isect_t, + lcg_state, + max_hits)) + { + return true; + } + } + break; + } +#endif + default: + break; + } + } + } while(node_addr != ENTRYPOINT_SENTINEL); + } while(node_addr != ENTRYPOINT_SENTINEL); + return false; +} + +#undef NODE_INTERSECT |