38 lines
1.1 KiB
C
38 lines
1.1 KiB
C
/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
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*
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* SPDX-License-Identifier: Apache-2.0 */
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#pragma once
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CCL_NAMESPACE_BEGIN
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ccl_device_noinline int svm_node_normal(KernelGlobals kg,
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ccl_private ShaderData *sd,
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ccl_private float *stack,
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uint in_normal_offset,
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uint out_normal_offset,
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uint out_dot_offset,
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int offset)
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{
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/* read extra data */
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uint4 node1 = read_node(kg, &offset);
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float3 normal = stack_load_float3(stack, in_normal_offset);
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float3 direction;
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direction.x = __int_as_float(node1.x);
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direction.y = __int_as_float(node1.y);
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direction.z = __int_as_float(node1.z);
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direction = normalize(direction);
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if (stack_valid(out_normal_offset)) {
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stack_store_float3(stack, out_normal_offset, direction);
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}
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if (stack_valid(out_dot_offset)) {
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stack_store_float(stack, out_dot_offset, dot(direction, normalize(normal)));
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}
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return offset;
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}
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CCL_NAMESPACE_END
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