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48 lines
2.3 KiB
Plaintext
48 lines
2.3 KiB
Plaintext
// Copyright 1998-2015 Epic Games, Inc. All Rights Reserved.
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/*=============================================================================
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AtmospherePrecomputeCommon.usf: Functions and variables only used in precomputation in editor
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This code contains embedded portions of free sample source code from
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http://www-evasion.imag.fr/Membres/Eric.Bruneton/PrecomputedAtmosphericScattering2.zip, Author: Eric Bruneton,
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08/16/2011, Copyright (c) 2008 INRIA, All Rights Reserved, which have been altered from their original version.
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Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the copyright holders nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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=============================================================================*/
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#ifndef __ATMOSPHERE_PRECOMPUTE_COMMON__
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#define __ATMOSPHERE_PRECOMPUTE_COMMON__
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/** Integration Parameters */
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const static int TransmittanceIntegralSamples = 500;
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const static int InscatterIntegralSamples = 50;
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const static int IrradianceIntegralSamplesHalf = 16; // 32 / 2, division for integer has some problem in nVidia Card
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const static int InscatterSphericalIntegralSamples = 16;
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const static float DeltaPhi = PI / float(InscatterSphericalIntegralSamples);
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const static float DeltaTheta = PI / float(InscatterSphericalIntegralSamples);
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float FirstOrder;
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/** Textures only for precomputation on editor */
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Texture2D AtmosphereDeltaETexture;
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SamplerState AtmosphereDeltaETextureSampler;
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Texture3D AtmosphereDeltaSRTexture;
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SamplerState AtmosphereDeltaSRTextureSampler;
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Texture3D AtmosphereDeltaSMTexture;
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SamplerState AtmosphereDeltaSMTextureSampler;
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Texture3D AtmosphereDeltaJTexture;
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SamplerState AtmosphereDeltaJTextureSampler;
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#endif
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