diff options
Diffstat (limited to 'intern/cycles/kernel/svm/svm_fresnel.h')
| -rw-r--r-- | intern/cycles/kernel/svm/svm_fresnel.h | 66 |
1 files changed, 35 insertions, 31 deletions
diff --git a/intern/cycles/kernel/svm/svm_fresnel.h b/intern/cycles/kernel/svm/svm_fresnel.h index 99dda5fb170..03119991597 100644 --- a/intern/cycles/kernel/svm/svm_fresnel.h +++ b/intern/cycles/kernel/svm/svm_fresnel.h @@ -18,56 +18,60 @@ CCL_NAMESPACE_BEGIN /* Fresnel Node */ -ccl_device void svm_node_fresnel(ShaderData *sd, float *stack, uint ior_offset, uint ior_value, uint node) +ccl_device void svm_node_fresnel( + ShaderData *sd, float *stack, uint ior_offset, uint ior_value, uint node) { - uint normal_offset, out_offset; - decode_node_uchar4(node, &normal_offset, &out_offset, NULL, NULL); - float eta = (stack_valid(ior_offset))? stack_load_float(stack, ior_offset): __uint_as_float(ior_value); - float3 normal_in = stack_valid(normal_offset)? stack_load_float3(stack, normal_offset): sd->N; + uint normal_offset, out_offset; + decode_node_uchar4(node, &normal_offset, &out_offset, NULL, NULL); + float eta = (stack_valid(ior_offset)) ? stack_load_float(stack, ior_offset) : + __uint_as_float(ior_value); + float3 normal_in = stack_valid(normal_offset) ? stack_load_float3(stack, normal_offset) : sd->N; - eta = fmaxf(eta, 1e-5f); - eta = (sd->flag & SD_BACKFACING)? 1.0f/eta: eta; + eta = fmaxf(eta, 1e-5f); + eta = (sd->flag & SD_BACKFACING) ? 1.0f / eta : eta; - float f = fresnel_dielectric_cos(dot(sd->I, normal_in), eta); + float f = fresnel_dielectric_cos(dot(sd->I, normal_in), eta); - stack_store_float(stack, out_offset, f); + stack_store_float(stack, out_offset, f); } /* Layer Weight Node */ ccl_device void svm_node_layer_weight(ShaderData *sd, float *stack, uint4 node) { - uint blend_offset = node.y; - uint blend_value = node.z; + uint blend_offset = node.y; + uint blend_value = node.z; - uint type, normal_offset, out_offset; - decode_node_uchar4(node.w, &type, &normal_offset, &out_offset, NULL); + uint type, normal_offset, out_offset; + decode_node_uchar4(node.w, &type, &normal_offset, &out_offset, NULL); - float blend = (stack_valid(blend_offset))? stack_load_float(stack, blend_offset): __uint_as_float(blend_value); - float3 normal_in = (stack_valid(normal_offset))? stack_load_float3(stack, normal_offset): sd->N; + float blend = (stack_valid(blend_offset)) ? stack_load_float(stack, blend_offset) : + __uint_as_float(blend_value); + float3 normal_in = (stack_valid(normal_offset)) ? stack_load_float3(stack, normal_offset) : + sd->N; - float f; + float f; - if(type == NODE_LAYER_WEIGHT_FRESNEL) { - float eta = fmaxf(1.0f - blend, 1e-5f); - eta = (sd->flag & SD_BACKFACING)? eta: 1.0f/eta; + if (type == NODE_LAYER_WEIGHT_FRESNEL) { + float eta = fmaxf(1.0f - blend, 1e-5f); + eta = (sd->flag & SD_BACKFACING) ? eta : 1.0f / eta; - f = fresnel_dielectric_cos(dot(sd->I, normal_in), eta); - } - else { - f = fabsf(dot(sd->I, normal_in)); + f = fresnel_dielectric_cos(dot(sd->I, normal_in), eta); + } + else { + f = fabsf(dot(sd->I, normal_in)); - if(blend != 0.5f) { - blend = clamp(blend, 0.0f, 1.0f-1e-5f); - blend = (blend < 0.5f)? 2.0f*blend: 0.5f/(1.0f - blend); + if (blend != 0.5f) { + blend = clamp(blend, 0.0f, 1.0f - 1e-5f); + blend = (blend < 0.5f) ? 2.0f * blend : 0.5f / (1.0f - blend); - f = powf(f, blend); - } + f = powf(f, blend); + } - f = 1.0f - f; - } + f = 1.0f - f; + } - stack_store_float(stack, out_offset, f); + stack_store_float(stack, out_offset, f); } CCL_NAMESPACE_END |