diff options
Diffstat (limited to 'intern/cycles/kernel/svm/svm_ao.h')
| -rw-r--r-- | intern/cycles/kernel/svm/svm_ao.h | 151 |
1 files changed, 69 insertions, 82 deletions
diff --git a/intern/cycles/kernel/svm/svm_ao.h b/intern/cycles/kernel/svm/svm_ao.h index 0744ec1768f..06076175c40 100644 --- a/intern/cycles/kernel/svm/svm_ao.h +++ b/intern/cycles/kernel/svm/svm_ao.h @@ -24,95 +24,82 @@ ccl_device_noinline float svm_ao(KernelGlobals *kg, int num_samples, int flags) { - if(flags & NODE_AO_GLOBAL_RADIUS) { - max_dist = kernel_data.background.ao_distance; - } - - /* Early out if no sampling needed. */ - if(max_dist <= 0.0f || num_samples < 1 || sd->object == OBJECT_NONE) { - return 1.0f; - } - - /* Can't raytrace from shaders like displacement, before BVH exists. */ - if (kernel_data.bvh.bvh_layout == BVH_LAYOUT_NONE) { - return 1.0f; - } - - if(flags & NODE_AO_INSIDE) { - N = -N; - } - - float3 T, B; - make_orthonormals(N, &T, &B); - - int unoccluded = 0; - for(int sample = 0; sample < num_samples; sample++) { - float disk_u, disk_v; - path_branched_rng_2D(kg, state->rng_hash, state, sample, num_samples, - PRNG_BEVEL_U, &disk_u, &disk_v); - - float2 d = concentric_sample_disk(disk_u, disk_v); - float3 D = make_float3(d.x, d.y, safe_sqrtf(1.0f - dot(d, d))); - - /* Create ray. */ - Ray ray; - ray.P = ray_offset(sd->P, N); - ray.D = D.x*T + D.y*B + D.z*N; - ray.t = max_dist; - ray.time = sd->time; - ray.dP = sd->dP; - ray.dD = differential3_zero(); - - if(flags & NODE_AO_ONLY_LOCAL) { - if(!scene_intersect_local(kg, - ray, - NULL, - sd->object, - NULL, - 0)) { - unoccluded++; - } - } - else { - Intersection isect; - if(!scene_intersect(kg, - ray, - PATH_RAY_SHADOW_OPAQUE, - &isect, - NULL, - 0.0f, 0.0f)) { - unoccluded++; - } - } - } - - return ((float) unoccluded) / num_samples; + if (flags & NODE_AO_GLOBAL_RADIUS) { + max_dist = kernel_data.background.ao_distance; + } + + /* Early out if no sampling needed. */ + if (max_dist <= 0.0f || num_samples < 1 || sd->object == OBJECT_NONE) { + return 1.0f; + } + + /* Can't raytrace from shaders like displacement, before BVH exists. */ + if (kernel_data.bvh.bvh_layout == BVH_LAYOUT_NONE) { + return 1.0f; + } + + if (flags & NODE_AO_INSIDE) { + N = -N; + } + + float3 T, B; + make_orthonormals(N, &T, &B); + + int unoccluded = 0; + for (int sample = 0; sample < num_samples; sample++) { + float disk_u, disk_v; + path_branched_rng_2D( + kg, state->rng_hash, state, sample, num_samples, PRNG_BEVEL_U, &disk_u, &disk_v); + + float2 d = concentric_sample_disk(disk_u, disk_v); + float3 D = make_float3(d.x, d.y, safe_sqrtf(1.0f - dot(d, d))); + + /* Create ray. */ + Ray ray; + ray.P = ray_offset(sd->P, N); + ray.D = D.x * T + D.y * B + D.z * N; + ray.t = max_dist; + ray.time = sd->time; + ray.dP = sd->dP; + ray.dD = differential3_zero(); + + if (flags & NODE_AO_ONLY_LOCAL) { + if (!scene_intersect_local(kg, ray, NULL, sd->object, NULL, 0)) { + unoccluded++; + } + } + else { + Intersection isect; + if (!scene_intersect(kg, ray, PATH_RAY_SHADOW_OPAQUE, &isect, NULL, 0.0f, 0.0f)) { + unoccluded++; + } + } + } + + return ((float)unoccluded) / num_samples; } -ccl_device void svm_node_ao(KernelGlobals *kg, - ShaderData *sd, - ccl_addr_space PathState *state, - float *stack, - uint4 node) +ccl_device void svm_node_ao( + KernelGlobals *kg, ShaderData *sd, ccl_addr_space PathState *state, float *stack, uint4 node) { - uint flags, dist_offset, normal_offset, out_ao_offset; - decode_node_uchar4(node.y, &flags, &dist_offset, &normal_offset, &out_ao_offset); + uint flags, dist_offset, normal_offset, out_ao_offset; + decode_node_uchar4(node.y, &flags, &dist_offset, &normal_offset, &out_ao_offset); - uint color_offset, out_color_offset, samples; - decode_node_uchar4(node.z, &color_offset, &out_color_offset, &samples, NULL); + uint color_offset, out_color_offset, samples; + decode_node_uchar4(node.z, &color_offset, &out_color_offset, &samples, NULL); - float dist = stack_load_float_default(stack, dist_offset, node.w); - float3 normal = stack_valid(normal_offset)? stack_load_float3(stack, normal_offset): sd->N; - float ao = svm_ao(kg, sd, normal, state, dist, samples, flags); + float dist = stack_load_float_default(stack, dist_offset, node.w); + float3 normal = stack_valid(normal_offset) ? stack_load_float3(stack, normal_offset) : sd->N; + float ao = svm_ao(kg, sd, normal, state, dist, samples, flags); - if(stack_valid(out_ao_offset)) { - stack_store_float(stack, out_ao_offset, ao); - } + if (stack_valid(out_ao_offset)) { + stack_store_float(stack, out_ao_offset, ao); + } - if(stack_valid(out_color_offset)) { - float3 color = stack_load_float3(stack, color_offset); - stack_store_float3(stack, out_color_offset, ao * color); - } + if (stack_valid(out_color_offset)) { + float3 color = stack_load_float3(stack, color_offset); + stack_store_float3(stack, out_color_offset, ao * color); + } } CCL_NAMESPACE_END |