atmosphere.h
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上传日期:2022-07-26
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- // atmosphere.h
- //
- // Copyright (C) 2001 Chris Laurel <claurel@shatters.net>
- //
- // This program is free software; you can redistribute it and/or
- // modify it under the terms of the GNU General Public License
- // as published by the Free Software Foundation; either version 2
- // of the License, or (at your option) any later version.
- #ifndef _ATMOSPHERE_H_
- #define _ATMOSPHERE_H_
- #include <celutil/reshandle.h>
- #include <celutil/color.h>
- #include <celmath/vecmath.h>
- #include <celengine/multitexture.h>
- class Atmosphere
- {
- public:
- Atmosphere() :
- height(0.0f),
- lowerColor(0.0f, 0.0f, 0.0f),
- upperColor(0.0f, 0.0f, 0.0f),
- skyColor(0.0f, 0.0f, 0.0f),
- sunsetColor(1.0f, 0.6f, 0.5f),
- cloudHeight(0.0f),
- cloudSpeed(0.0f),
- cloudTexture(),
- cloudNormalMap(),
- mieCoeff(0.0f),
- mieScaleHeight(0.0f),
- miePhaseAsymmetry(0.0f),
- rayleighCoeff(0.0f, 0.0f, 0.0f),
- rayleighScaleHeight(0.0f),
- absorptionCoeff(0.0f, 0.0f, 0.0f),
- cloudShadowDepth(0.0f)
- {};
- public:
- float height;
- Color lowerColor;
- Color upperColor;
- Color skyColor;
- Color sunsetColor;
-
- float cloudHeight;
- float cloudSpeed;
- MultiResTexture cloudTexture;
- MultiResTexture cloudNormalMap;
-
- float mieCoeff;
- float mieScaleHeight;
- float miePhaseAsymmetry;
- Vec3f rayleighCoeff;
- float rayleighScaleHeight;
- Vec3f absorptionCoeff;
- float cloudShadowDepth;
- };
- // Atmosphere density is modeled with a exp(-y/H) falloff, where
- // H is the scale height of the atmosphere. Thus atmospheres have
- // infinite extent, but we still need to choose some finite sphere
- // to render. The radius of the sphere is the height at which the
- // density of the atmosphere falls to the extinction threshold, i.e.
- // -H * ln(extinctionThreshold)
- extern const double AtmosphereExtinctionThreshold;
- #endif // _ATMOSPHERE_H_