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91 lines
3.6 KiB
C++
91 lines
3.6 KiB
C++
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2016 *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this *
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* software and associated documentation files (the "Software"), to deal in the Software *
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* without restriction, including without limitation the rights to use, copy, modify, *
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* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to *
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* permit persons to whom the Software is furnished to do so, subject to the following *
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* conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in all copies *
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* or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, *
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A *
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* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT *
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF *
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE *
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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****************************************************************************************/
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#ifndef __CULLING_H__
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#define __CULLING_H__
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#include <memory>
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#include <glm/glm.hpp>
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// open space includes
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#include <openspace/rendering/renderable.h>
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#include <modules/globebrowsing/geodetics/geodetic2.h>
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#include <modules/globebrowsing/geodetics/ellipsoid.h>
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#include <modules/globebrowsing/rendering/aabb.h>
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namespace openspace {
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using namespace glm;
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class Chunk;
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class ChunkCuller {
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public:
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virtual void update() { }
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virtual bool isCullable(const Chunk& chunk, const RenderData& renderData) = 0;
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};
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class FrustumCuller : public ChunkCuller {
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public:
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FrustumCuller(const AABB3 viewFrustum);
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~FrustumCuller();
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virtual bool isCullable(const Chunk& chunk, const RenderData& renderData);
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private:
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const AABB3 _viewFrustum;
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};
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//In the current implementation of the horizon culling and the distance to the
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//camera, the closer the ellipsoid is to a
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//sphere, the better this will make the splitting. Using the minimum radius to
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//be safe. This means that if the ellipsoid has high difference between radii,
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//splitting might accur even though it is not needed.
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class HorizonCuller : public ChunkCuller {
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public:
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HorizonCuller();
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~HorizonCuller();
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virtual bool isCullable(const Chunk& chunk, const RenderData& renderData);
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bool isCullable(const Vec3& cameraPosition, const Vec3& globePosition,
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const Vec3& objectPosition, Scalar objectBoundingSphereRadius,
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Scalar minimumGlobeRadius);
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};
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} // namespace openspace
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#endif // __CULLING_H__
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