34 lines
995 B
C
34 lines
995 B
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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#include "kernel/util/ies.h"
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CCL_NAMESPACE_BEGIN
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ccl_device_noinline void svm_node_ies(KernelGlobals kg,
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ccl_private ShaderData *sd,
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ccl_private float *stack,
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uint4 node)
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{
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uint vector_offset, strength_offset, fac_offset, slot = node.z;
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svm_unpack_node_uchar3(node.y, &strength_offset, &vector_offset, &fac_offset);
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float3 vector = stack_load_float3(stack, vector_offset);
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float strength = stack_load_float_default(stack, strength_offset, node.w);
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vector = normalize(vector);
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float v_angle = safe_acosf(-vector.z);
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float h_angle = atan2f(vector.x, vector.y) + M_PI_F;
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float fac = strength * kernel_ies_interp(kg, slot, h_angle, v_angle);
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if (stack_valid(fac_offset)) {
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stack_store_float(stack, fac_offset, fac);
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}
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}
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CCL_NAMESPACE_END
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