# OgreLodStrategy.h

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    00001 /*
    00002 -----------------------------------------------------------------------------
    00003 This source file is part of OGRE
    00004     (Object-oriented Graphics Rendering Engine)
    00005 For the latest info, see http://www.ogre3d.org/
    00006
    00007 Copyright (c) 2000-2009 Torus Knot Software Ltd
    00008
    00009 Permission is hereby granted, free of charge, to any person obtaining a copy
    00010 of this software and associated documentation files (the "Software"), to deal
    00011 in the Software without restriction, including without limitation the rights
    00012 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    00013 copies of the Software, and to permit persons to whom the Software is
    00014 furnished to do so, subject to the following conditions:
    00015
    00016 The above copyright notice and this permission notice shall be included in
    00017 all copies or substantial portions of the Software.
    00018
    00019 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    00020 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    00021 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    00022 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    00023 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    00024 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    00025 THE SOFTWARE.
    00026 -----------------------------------------------------------------------------
    00027 */
    00028 #ifndef __Lod_Strategy_H__
    00029 #define __Lod_Strategy_H__
    00030
    00031 #include "OgrePrerequisites.h"
    00032
    00033 #include "OgreMesh.h"
    00034
    00035 #include "OgreMovableObject.h"
    00036 #include "OgreCamera.h"
    00037
    00038 namespace Ogre {
    00039
    00053     class _OgreExport LodStrategy : public LodAlloc
    00054     {
    00055     protected:
    00057         String mName;
    00058
    00060         virtual Real getValueImpl(const MovableObject *movableObject, const Camera *camera) const = 0;
    00061
    00062     public:
    00064         LodStrategy(const String& name);
    00065
    00067         virtual ~LodStrategy();
    00068
    00070         virtual Real getBaseValue() const = 0;
    00071
    00073         virtual Real transformBias(Real factor) const = 0;
    00074
    00082         virtual Real transformUserValue(Real userValue) const;
    00083
    00085         Real getValue(const MovableObject *movableObject, const Camera *camera) const;
    00086
    00088         virtual ushort getIndex(Real value, const Mesh::MeshLodUsageList& meshLodUsageList) const = 0;
    00089
    00091         virtual ushort getIndex(Real value, const Material::LodValueList& materialLodValueList) const = 0;
    00092
    00094         virtual void sort(Mesh::MeshLodUsageList& meshLodUsageList) const = 0;
    00095
    00097         virtual bool isSorted(const Mesh::LodValueList& values) const = 0;
    00098
    00100         void assertSorted(const Mesh::LodValueList& values) const;
    00101
    00103         const String& getName() const { return mName; }
    00104
    00105     protected:
    00107         static bool isSortedAscending(const Mesh::LodValueList& values);
    00109         static bool isSortedDescending(const Mesh::LodValueList& values);
    00110
    00112         static void sortAscending(Mesh::MeshLodUsageList& meshLodUsageList);
    00114         static void sortDescending(Mesh::MeshLodUsageList& meshLodUsageList);
    00115
    00117         static ushort getIndexAscending(Real value, const Mesh::MeshLodUsageList& meshLodUsageList);
    00119         static ushort getIndexDescending(Real value, const Mesh::MeshLodUsageList& meshLodUsageList);
    00120
    00122         static ushort getIndexAscending(Real value, const Material::LodValueList& materialLodValueList);
    00124         static ushort getIndexDescending(Real value, const Material::LodValueList& materialLodValueList);
    00125
    00126     };
    00130 } // namespace
    00131
    00132 #endif

Copyright © 2008 Torus Knot Software Ltd
This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.
Last modified Sun May 8 2011 20:28:08