OGRE  1.9.0
OgrePixelCountLodStrategy.h
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1/*
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3This source file is part of OGRE
4 (Object-oriented Graphics Rendering Engine)
5For the latest info, see http://www.ogre3d.org/
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7Copyright (c) 2000-2014 Torus Knot Software Ltd
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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
37namespace Ogre {
38
47 {
48 protected:
50 virtual Real getValueImpl(const MovableObject *movableObject, const Camera *camera) const = 0;
51
52 public:
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
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
163 };
167} // namespace
168
169#endif
#define _OgreExport
static AbsolutePixelCountLodStrategy & getSingleton(void)
Override standard Singleton retrieval.
AbsolutePixelCountLodStrategy()
Default constructor.
static AbsolutePixelCountLodStrategy * getSingletonPtr(void)
Override standard Singleton retrieval.
Real getValueImpl(const MovableObject *movableObject, const Camera *camera) const
Compute the LOD value for a given movable object relative to a given camera.
A viewpoint from which the scene will be rendered.
Definition OgreCamera.h:87
Strategy for determining level of detail.
vector< Real >::type LodValueList
distance list used to specify LOD
vector< Real >::type LodValueList
Definition OgreMesh.h:102
vector< MeshLodUsage >::type MeshLodUsageList
Definition OgreMesh.h:103
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...
virtual Real transformBias(Real factor) const
Transform LOD bias so it only needs to be multiplied by the LOD value.
virtual bool isSorted(const Mesh::LodValueList &values) const
Determine if the LOD values are sorted from greatest detail to least detail.
virtual void sort(Mesh::MeshLodUsageList &meshLodUsageList) const
Sort mesh LOD usage list from greatest to least detail.
virtual ushort getIndex(Real value, const Material::LodValueList &materialLodValueList) const
Get the index of the LOD usage which applies to a given value.
virtual Real getValueImpl(const MovableObject *movableObject, const Camera *camera) const =0
Compute the LOD value for a given movable object relative to a given camera.
virtual Real getBaseValue() const
Get the value of the first (highest) level of detail.
virtual ushort getIndex(Real value, const Mesh::MeshLodUsageList &meshLodUsageList) const
Get the index of the LOD usage which applies to a given value.
PixelCountLodStrategy(const String &name)
Default constructor.
static ScreenRatioPixelCountLodStrategy & getSingleton(void)
Override standard Singleton retrieval.
Real getValueImpl(const MovableObject *movableObject, const Camera *camera) const
Compute the LOD value for a given movable object relative to a given camera.
ScreenRatioPixelCountLodStrategy()
Default constructor.
static ScreenRatioPixelCountLodStrategy * getSingletonPtr(void)
Override standard Singleton retrieval.
Template class for creating single-instance global classes.
float Real
Software floating point type.
_StringBase String
unsigned short ushort