Brecht Van Lommel
9cfc7967dd
* Replace license text in headers with SPDX identifiers. * Remove specific license info from outdated readme.txt, instead leave details to the source files. * Add list of SPDX license identifiers used, and corresponding license texts. * Update copyright dates while we're at it. Ref D14069, T95597
30 lines
755 B
Plaintext
30 lines
755 B
Plaintext
/* SPDX-License-Identifier: Apache-2.0
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* Copyright 2011-2022 Blender Foundation */
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#include "stdcycles.h"
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shader node_light_falloff(float Strength = 0.0,
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float Smooth = 0.0,
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output float Quadratic = 0.0,
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output float Linear = 0.0,
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output float Constant = 0.0)
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{
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float ray_length = 0.0;
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float strength = Strength;
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getattribute("path:ray_length", ray_length);
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if (Smooth > 0.0) {
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float squared = ray_length * ray_length;
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strength *= squared / (Smooth + squared);
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}
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/* Quadratic */
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Quadratic = strength;
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/* Linear */
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Linear = (strength * ray_length);
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/* Constant */
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Constant = (strength * ray_length * ray_length);
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}
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