60 lines
1.9 KiB
C
60 lines
1.9 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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/* Noise */
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ccl_device void svm_node_tex_noise(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node, int *offset)
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{
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uint co_offset, scale_offset, detail_offset, distortion_offset, fac_offset, color_offset;
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decode_node_uchar4(node.y, &co_offset, &scale_offset, &detail_offset, &distortion_offset);
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decode_node_uchar4(node.z, &color_offset, &fac_offset, NULL, NULL);
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uint4 node2 = read_node(kg, offset);
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float scale = stack_load_float_default(stack, scale_offset, node2.x);
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float detail = stack_load_float_default(stack, detail_offset, node2.y);
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float distortion = stack_load_float_default(stack, distortion_offset, node2.z);
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float3 p = stack_load_float3(stack, co_offset) * scale;
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int hard = 0;
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if(distortion != 0.0f) {
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float3 r, offset = make_float3(13.5f, 13.5f, 13.5f);
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r.x = noise(p + offset) * distortion;
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r.y = noise(p) * distortion;
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r.z = noise(p - offset) * distortion;
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p += r;
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}
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float f = noise_turbulence(p, detail, hard);
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if(stack_valid(fac_offset)) {
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stack_store_float(stack, fac_offset, f);
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}
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if(stack_valid(color_offset)) {
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float3 color = make_float3(f,
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noise_turbulence(make_float3(p.y, p.x, p.z), detail, hard),
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noise_turbulence(make_float3(p.y, p.z, p.x), detail, hard));
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stack_store_float3(stack, color_offset, color);
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}
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}
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CCL_NAMESPACE_END
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