OGRE 2.3.3
Object-Oriented Graphics Rendering Engine
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Ogre::ScreenRatioPixelCountLodStrategy Class Reference

The ScreenRatioPixelCountLodStrategy class Implement a strategy which calculates LOD ratios based on coverage in screen ratios in the range [-1.0; 0.0] where -1.0 means the object is covering the whole screen and 0 covering almost nothing in the screen (very tiny). More...

#include <OgrePixelCountLodStrategy.h>

+ Inheritance diagram for Ogre::ScreenRatioPixelCountLodStrategy:

Public Member Functions

 ScreenRatioPixelCountLodStrategy ()
 Default constructor.
 
virtual Real getBaseValue () const
 Get the value of the first (highest) level of detail.
 
const StringgetName () const
 Get the name of this strategy.
 
Real getValue (const MovableObject *movableObject, const Camera *camera) const
 Compute the LOD value for a given movable object relative to a given camera.
 
Real getValueImpl (const MovableObject *movableObject, const Camera *camera) const
 Compute the LOD value for a given movable object relative to a given camera.
 
virtual void lodUpdateImpl (const size_t numNodes, ObjectData t, const Camera *camera, Real bias) const
 
void operator delete (void *ptr)
 
void operator delete (void *ptr, const char *, int, const char *)
 
void operator delete (void *ptr, void *)
 
void operator delete[] (void *ptr)
 
void operator delete[] (void *ptr, const char *, int, const char *)
 
voidoperator new (size_t sz)
 
voidoperator new (size_t sz, const char *file, int line, const char *func)
 operator new, with debug line info
 
voidoperator new (size_t sz, void *ptr)
 placement operator new
 
voidoperator new[] (size_t sz)
 
voidoperator new[] (size_t sz, const char *file, int line, const char *func)
 array operator new, with debug line info
 
virtual Real transformBias (Real factor) const
 Transform LOD bias so it only needs to be multiplied by the LOD value.
 
virtual Real transformUserValue (Real userValue) const
 Transform user supplied value to internal value.
 

Static Public Member Functions

static ScreenRatioPixelCountLodStrategygetSingleton (void)
 Override standard Singleton retrieval.
 
static ScreenRatioPixelCountLodStrategygetSingletonPtr (void)
 Override standard Singleton retrieval.
 
static void lodSet (ObjectData &t, Real lodValues[ARRAY_PACKED_REALS])
 

Detailed Description

The ScreenRatioPixelCountLodStrategy class Implement a strategy which calculates LOD ratios based on coverage in screen ratios in the range [-1.0; 0.0] where -1.0 means the object is covering the whole screen and 0 covering almost nothing in the screen (very tiny).

Note however that:

  1. Values beyond -1.0 are possible (it just means the object is bigger than the screen)
  2. It's an approximation

Constructor & Destructor Documentation

◆ ScreenRatioPixelCountLodStrategy()

Ogre::ScreenRatioPixelCountLodStrategy::ScreenRatioPixelCountLodStrategy ( )

Default constructor.

Member Function Documentation

◆ getBaseValue()

virtual Real Ogre::PixelCountLodStrategyBase::getBaseValue ( ) const
virtualinherited

Get the value of the first (highest) level of detail.

Implements Ogre::LodStrategy.

◆ getName()

const String & Ogre::LodStrategy::getName ( ) const
inlineinherited

Get the name of this strategy.

◆ getSingleton()

static ScreenRatioPixelCountLodStrategy & Ogre::ScreenRatioPixelCountLodStrategy::getSingleton ( void  )
static

Override standard Singleton retrieval.

Remarks
Why do we do this? Well, it's because the Singleton implementation is in a .h file, which means it gets compiled into anybody who includes it. This is needed for the Singleton template to work, but we actually only want it compiled into the implementation of the class based on the Singleton, not all of them. If we don't change this, we get link errors when trying to use the Singleton-based class from an outside dll.
This method just delegates to the template version anyway, but the implementation stays in this single compilation unit, preventing link errors.

◆ getSingletonPtr()

static ScreenRatioPixelCountLodStrategy * Ogre::ScreenRatioPixelCountLodStrategy::getSingletonPtr ( void  )
static

Override standard Singleton retrieval.

Remarks
Why do we do this? Well, it's because the Singleton implementation is in a .h file, which means it gets compiled into anybody who includes it. This is needed for the Singleton template to work, but we actually only want it compiled into the implementation of the class based on the Singleton, not all of them. If we don't change this, we get link errors when trying to use the Singleton-based class from an outside dll.
This method just delegates to the template version anyway, but the implementation stays in this single compilation unit, preventing link errors.

◆ getValue()

Real Ogre::LodStrategy::getValue ( const MovableObject movableObject,
const Camera camera 
) const
inherited

Compute the LOD value for a given movable object relative to a given camera.

◆ getValueImpl()

Real Ogre::ScreenRatioPixelCountLodStrategy::getValueImpl ( const MovableObject movableObject,
const Camera camera 
) const
virtual

Compute the LOD value for a given movable object relative to a given camera.

Implements Ogre::LodStrategy.

◆ lodSet()

static void Ogre::LodStrategy::lodSet ( ObjectData t,
Real  lodValues[ARRAY_PACKED_REALS] 
)
inlinestaticinherited

◆ lodUpdateImpl()

virtual void Ogre::ScreenRatioPixelCountLodStrategy::lodUpdateImpl ( const size_t  numNodes,
ObjectData  t,
const Camera camera,
Real  bias 
) const
virtual

Implements Ogre::LodStrategy.

◆ operator delete() [1/3]

template<class Alloc >
void Ogre::AllocatedObject< Alloc >::operator delete ( void ptr)
inlineinherited

◆ operator delete() [2/3]

template<class Alloc >
void Ogre::AllocatedObject< Alloc >::operator delete ( void ptr,
const char ,
int  ,
const char  
)
inlineinherited

◆ operator delete() [3/3]

template<class Alloc >
void Ogre::AllocatedObject< Alloc >::operator delete ( void ptr,
void  
)
inlineinherited

◆ operator delete[]() [1/2]

template<class Alloc >
void Ogre::AllocatedObject< Alloc >::operator delete[] ( void ptr)
inlineinherited

◆ operator delete[]() [2/2]

template<class Alloc >
void Ogre::AllocatedObject< Alloc >::operator delete[] ( void ptr,
const char ,
int  ,
const char  
)
inlineinherited

◆ operator new() [1/3]

template<class Alloc >
void * Ogre::AllocatedObject< Alloc >::operator new ( size_t  sz)
inlineinherited

◆ operator new() [2/3]

template<class Alloc >
void * Ogre::AllocatedObject< Alloc >::operator new ( size_t  sz,
const char file,
int  line,
const char func 
)
inlineinherited

operator new, with debug line info

◆ operator new() [3/3]

template<class Alloc >
void * Ogre::AllocatedObject< Alloc >::operator new ( size_t  sz,
void ptr 
)
inlineinherited

placement operator new

◆ operator new[]() [1/2]

template<class Alloc >
void * Ogre::AllocatedObject< Alloc >::operator new[] ( size_t  sz)
inlineinherited

◆ operator new[]() [2/2]

template<class Alloc >
void * Ogre::AllocatedObject< Alloc >::operator new[] ( size_t  sz,
const char file,
int  line,
const char func 
)
inlineinherited

array operator new, with debug line info

◆ transformBias()

virtual Real Ogre::PixelCountLodStrategyBase::transformBias ( Real  factor) const
virtualinherited

Transform LOD bias so it only needs to be multiplied by the LOD value.

Implements Ogre::LodStrategy.

◆ transformUserValue()

virtual Real Ogre::PixelCountLodStrategyBase::transformUserValue ( Real  userValue) const
inlinevirtualinherited

Transform user supplied value to internal value.

Remarks
Do not throw exceptions for invalid values here, as the LOD strategy may be changed such that the values become valid.

Reimplemented from Ogre::LodStrategy.


The documentation for this class was generated from the following file: