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Object-Oriented Graphics Rendering Engine
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OgrePixelCountLodStrategy.h
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1 /*
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3 This source file is part of OGRE
4  (Object-oriented Graphics Rendering Engine)
5 For the latest info, see http://www.ogre3d.org/
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28 #ifndef __Pixel_Count_Lod_Strategy_H__
29 #define __Pixel_Count_Lod_Strategy_H__
30 
31 #include "OgrePrerequisites.h"
32 
33 #include "OgreLodStrategy.h"
34 #include "OgreSingleton.h"
35 #include "OgreNode.h"
36 
37 namespace Ogre {
38 
47  {
48  protected:
50  virtual Real getValueImpl(const MovableObject *movableObject, const Camera *camera) const = 0;
51 
52  public:
54  PixelCountLodStrategy(const String& name);
55 
57  virtual Real getBaseValue() const;
58 
60  virtual Real transformBias(Real factor) const;
61 
63  virtual ushort getIndex(Real value, const Mesh::MeshLodUsageList& meshLodUsageList) const;
64 
66  virtual ushort getIndex(Real value, const Material::LodValueList& materialLodValueList) const;
67 
69  virtual void sort(Mesh::MeshLodUsageList& meshLodUsageList) const;
70 
72  virtual bool isSorted(const Mesh::LodValueList& values) const;
73  };
77  class _OgreExport AbsolutePixelCountLodStrategy : public PixelCountLodStrategy, public Singleton<AbsolutePixelCountLodStrategy>
78  {
79  public:
82 
84  Real getValueImpl(const MovableObject *movableObject, const Camera *camera) const;
85 
101  static AbsolutePixelCountLodStrategy& getSingleton(void);
117  static AbsolutePixelCountLodStrategy* getSingletonPtr(void);
118  };
122  class _OgreExport ScreenRatioPixelCountLodStrategy : public PixelCountLodStrategy, public Singleton<ScreenRatioPixelCountLodStrategy>
123  {
124  public:
127 
129  Real getValueImpl(const MovableObject *movableObject, const Camera *camera) const;
130 
146  static ScreenRatioPixelCountLodStrategy& getSingleton(void);
162  static ScreenRatioPixelCountLodStrategy* getSingletonPtr(void);
163  };
167 } // namespace
168 
169 #endif
A viewpoint from which the scene will be rendered.
Definition: OgreCamera.h:86
float Real
Software floating point type.
#define _OgreExport
Definition: OgrePlatform.h:260
Template class for creating single-instance global classes.
Definition: OgreSingleton.h:64
Strategy for determining level of detail.
vector< Real >::type LodValueList
distance list used to specify LOD
Definition: OgreMaterial.h:95
Abstract class defining a movable object in a scene.
Abstract base class for level of detail strategy based on pixel count approximations from bounding sp...
unsigned short ushort
vector< Real >::type LodValueList
Definition: OgreMesh.h:102
_StringBase String
vector< MeshLodUsage >::type MeshLodUsageList
Definition: OgreMesh.h:103