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Add a new shader node to control volume coefficients (scattering, absorption and emission) directly, making it easier to model existing volumes with measured data. Pull Request: https://projects.blender.org/blender/blender/pulls/136287
26 lines
1.1 KiB
Text
26 lines
1.1 KiB
Text
/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
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*
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* SPDX-License-Identifier: Apache-2.0 */
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#include "node_scatter.h"
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shader node_volume_coefficients(string phase = "Henyey-Greenstein",
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vector AbsorptionCoefficients = vector(1.0, 1.0, 1.0),
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vector ScatterCoefficients = vector(1.0, 1.0, 1.0),
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float Anisotropy = 0.0,
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float IOR = 1.33,
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float Backscatter = 0.1,
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float Alpha = 0.5,
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float Diameter = 20.0,
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vector EmissionCoefficients = vector(0.0, 0.0, 0.0),
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output closure color Volume = 0)
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{
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closure color scatter_closure = scatter(phase, Anisotropy, IOR, Backscatter, Alpha, Diameter);
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/* Add scattering and absorption closures. */
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Volume = color(ScatterCoefficients) * scatter_closure +
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color(AbsorptionCoefficients) * absorption();
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/* Compute emission. */
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Volume += color(EmissionCoefficients) * emission();
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}
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