forked from bartvdbraak/blender
55 lines
1.8 KiB
C
55 lines
1.8 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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/* Voronoi */
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ccl_device_noinline float4 svm_voronoi(NodeVoronoiColoring coloring, float3 p)
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{
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if(coloring == NODE_VORONOI_INTENSITY) {
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/* compute squared distance to the nearest neighbour */
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float fac = voronoi_F1_distance(p);
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return make_float4(fac, fac, fac, fac);
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}
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else {
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/* compute color of the nearest neighbour */
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float3 color = voronoi_F1_color(p);
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return make_float4(color.x, color.y, color.z, average(color));
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}
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}
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ccl_device void svm_node_tex_voronoi(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node, int *offset)
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{
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uint coloring = node.y;
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uint scale_offset, co_offset, fac_offset, color_offset;
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decode_node_uchar4(node.z, &scale_offset, &co_offset, &fac_offset, &color_offset);
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float3 co = stack_load_float3(stack, co_offset);
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float scale = stack_load_float_default(stack, scale_offset, node.w);
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float4 result = svm_voronoi((NodeVoronoiColoring)coloring, co*scale);
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float3 color = make_float3(result.x, result.y, result.z);
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float f = result.w;
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if(stack_valid(fac_offset)) stack_store_float(stack, fac_offset, f);
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if(stack_valid(color_offset)) stack_store_float3(stack, color_offset, color);
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}
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CCL_NAMESPACE_END
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