55 lines
2.0 KiB
C
55 lines
2.0 KiB
C
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/*
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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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/* Map Range Node */
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ccl_device void svm_node_map_range(KernelGlobals *kg,
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ShaderData *sd,
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float *stack,
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uint value_stack_offset,
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uint parameters_stack_offsets,
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uint result_stack_offset,
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int *offset)
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{
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uint from_min_stack_offset, from_max_stack_offset, to_min_stack_offset, to_max_stack_offset;
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decode_node_uchar4(parameters_stack_offsets,
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&from_min_stack_offset,
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&from_max_stack_offset,
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&to_min_stack_offset,
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&to_max_stack_offset);
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uint4 defaults = read_node(kg, offset);
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float value = stack_load_float(stack, value_stack_offset);
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float from_min = stack_load_float_default(stack, from_min_stack_offset, defaults.x);
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float from_max = stack_load_float_default(stack, from_max_stack_offset, defaults.y);
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float to_min = stack_load_float_default(stack, to_min_stack_offset, defaults.z);
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float to_max = stack_load_float_default(stack, to_max_stack_offset, defaults.w);
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float result;
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if (from_max != from_min) {
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result = to_min + ((value - from_min) / (from_max - from_min)) * (to_max - to_min);
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}
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else {
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result = 0.0f;
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}
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stack_store_float(stack, result_stack_offset, result);
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}
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CCL_NAMESPACE_END
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