96 lines
2.2 KiB
C++
96 lines
2.2 KiB
C++
// lightenv.h
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//
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// Structures that describe the lighting environment for rendering objects
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// in Celestia.
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//
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// Copyright (C) 2006, Chris Laurel <claurel@shatters.net>
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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#ifndef _CELENGINE_LIGHTENV_H_
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#define _CELENGINE_LIGHTENV_H_
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#include <celutil/color.h>
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#include <Eigen/Core>
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#include <Eigen/Geometry>
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#include <vector>
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static const unsigned int MaxLights = 8;
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class Body;
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class RingSystem;
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class DirectionalLight
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{
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public:
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Color color;
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float irradiance;
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Eigen::Vector3f direction_eye;
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Eigen::Vector3f direction_obj;
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// Required for eclipse shadows only--may be able to use
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// distance instead of position.
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Eigen::Vector3d position; // position relative to the lit object
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float apparentSize;
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bool castsShadows;
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};
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class EclipseShadow
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{
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public:
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const Body* caster;
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Eigen::Quaternionf casterOrientation;
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Eigen::Vector3f origin;
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Eigen::Vector3f direction;
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float penumbraRadius;
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float umbraRadius;
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float maxDepth;
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};
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class RingShadow
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{
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public:
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RingSystem* ringSystem;
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Eigen::Quaternionf casterOrientation;
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Eigen::Vector3f origin;
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Eigen::Vector3f direction;
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float texLod;
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};
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class LightingState
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{
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public:
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typedef std::vector<EclipseShadow> EclipseShadowVector;
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LightingState() :
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nLights(0),
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shadowingRingSystem(nullptr),
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eyeDir_obj(-Eigen::Vector3f::UnitZ()),
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eyePos_obj(-Eigen::Vector3f::UnitZ())
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{
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shadows[0] = nullptr;
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for (unsigned int i = 0; i < MaxLights; ++i)
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{
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ringShadows[i].ringSystem = nullptr;
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}
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};
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unsigned int nLights;
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DirectionalLight lights[MaxLights];
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EclipseShadowVector* shadows[MaxLights];
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RingShadow ringShadows[MaxLights];
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RingSystem* shadowingRingSystem; // nullptr when there are no ring shadows
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Eigen::Vector3f ringPlaneNormal;
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Eigen::Vector3f ringCenter;
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Eigen::Vector3f eyeDir_obj;
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Eigen::Vector3f eyePos_obj;
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Eigen::Vector3f ambientColor;
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};
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#endif // _CELENGINE_LIGHTENV_H_
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