forked from bartvdbraak/blender
Brecht Van Lommel
c18712e868
This to avoids build conflicts with libc++ on FreeBSD, these __ prefixed values are reserved for compilers. I apologize to anyone who has patches or branches and has to go through the pain of merging this change, it may be easiest to do these same replacements in your code and then apply/merge the patch. Ref T37477.
73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/*
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* Copyright 2011-2013 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License
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*/
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CCL_NAMESPACE_BEGIN
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/* Bump Node */
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ccl_device void svm_node_set_bump(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node)
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{
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#ifdef __RAY_DIFFERENTIALS__
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/* get normal input */
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uint normal_offset, distance_offset, invert;
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decode_node_uchar4(node.y, &normal_offset, &distance_offset, &invert, NULL);
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float3 normal_in = stack_valid(normal_offset)? stack_load_float3(stack, normal_offset): sd->N;
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/* get surface tangents from normal */
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float3 Rx = cross(sd->dP.dy, normal_in);
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float3 Ry = cross(normal_in, sd->dP.dx);
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/* get bump values */
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uint c_offset, x_offset, y_offset, strength_offset;
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decode_node_uchar4(node.z, &c_offset, &x_offset, &y_offset, &strength_offset);
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float h_c = stack_load_float(stack, c_offset);
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float h_x = stack_load_float(stack, x_offset);
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float h_y = stack_load_float(stack, y_offset);
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/* compute surface gradient and determinant */
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float det = dot(sd->dP.dx, Rx);
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float3 surfgrad = (h_x - h_c)*Rx + (h_y - h_c)*Ry;
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float absdet = fabsf(det);
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float strength = stack_load_float(stack, strength_offset);
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float distance = stack_load_float(stack, distance_offset);
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if(invert)
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distance *= -1.0f;
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strength = max(strength, 0.0f);
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/* compute and output perturbed normal */
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float3 normal_out = normalize(absdet*normal_in - distance*signf(det)*surfgrad);
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normal_out = normalize(strength*normal_out + (1.0f - strength)*normal_in);
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stack_store_float3(stack, node.w, normal_out);
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#endif
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}
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/* Displacement Node */
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ccl_device void svm_node_set_displacement(ShaderData *sd, float *stack, uint fac_offset)
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{
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float d = stack_load_float(stack, fac_offset);
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sd->P += sd->N*d*0.1f; /* todo: get rid of this factor */
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}
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CCL_NAMESPACE_END
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