Ogre::DistanceLodStrategyBase Class Reference

Level of detail strategy based on distance from camera. More...

#include <OgreDistanceLodStrategy.h>

Inheritance diagram for Ogre::DistanceLodStrategyBase:

Public Member Functions
	DistanceLodStrategyBase (const String &name)
	Default constructor. More...
Real	getBaseValue () const override
	Get the value of the first (highest) level of detail. More...
ushort	getIndex (Real value, const Mesh::MeshLodUsageList &meshLodUsageList) const override
	Get the index of the LOD usage which applies to a given value. More...
ushort	getIndex (Real value, const Material::LodValueList &materialLodValueList) const override
	Get the index of the LOD usage which applies to a given value. More...
virtual Real	getSquaredDepth (const MovableObject *movableObject, const Ogre::Camera *camera) const =0
	Get the squared distance between the camera and the LOD object. More...
bool	isReferenceViewEnabled () const
	Determine if use of the reference view is enabled. More...
bool	isSorted (const Mesh::LodValueList &values) const override
	Determine if the LOD values are sorted from greatest detail to least detail. More...
void	setReferenceView (Real viewportWidth, Real viewportHeight, Radian fovY)
	Sets the reference view upon which the distances were based. More...
void	setReferenceViewEnabled (bool value)
	Enables to disables use of the reference view. More...
void	sort (Mesh::MeshLodUsageList &meshLodUsageList) const override
	Sort mesh LOD usage list from greatest to least detail. More...
Real	transformBias (Real factor) const override
	Transform LOD bias so it only needs to be multiplied by the LOD value. More...
Real	transformUserValue (Real userValue) const override
	Transform user supplied value to internal value. More...
Public Member Functions inherited from Ogre::LodStrategy
	LodStrategy (const String &name)
	Constructor accepting name. More...
virtual	~LodStrategy ()
	Virtual destructor. More...
void	assertSorted (const Mesh::LodValueList &values) const
	Assert that the LOD values are sorted from greatest detail to least detail. More...
const String &	getName () const
	Get the name of this strategy. More...
Real	getValue (const MovableObject *movableObject, const Camera *camera) const
	Compute the LOD value for a given movable object relative to a given camera. More...

Detailed Description

Level of detail strategy based on distance from camera.

This is an abstract base class for DistanceLodBoxStrategy and DistanceLodSphereStrategy.

The purpose of the reference view is to ensure a consistent experience for all users. Monitors of different resolutions and aspect ratios will each have different results for the distance queries.

It depends on gameplay testing. If all testers had 16:9 monitors and 110° FOV, then that's the value you should enter (to ensure as much as possible the experience stays consistent for all other users who don't have a 16:9 monitor and/or use a different FOV).

If all your testers had 4:3 monitors, then enter a 4:3 resolution.

If all your testers had varying resolutions or you just didn't care, then this feature is useless for you and should be disabled (default: disabled).

Constructor & Destructor Documentation

DistanceLodStrategyBase()

Ogre::DistanceLodStrategyBase::DistanceLodStrategyBase

(

const String &

name

)

Default constructor.

Member Function Documentation

getBaseValue()

Real Ogre::DistanceLodStrategyBase::getBaseValue ( ) const

overridevirtual

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

Implements Ogre::LodStrategy.

transformBias()

Real Ogre::DistanceLodStrategyBase::transformBias ( Real  factor ) const

overridevirtual

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

Implements Ogre::LodStrategy.

transformUserValue()

Real Ogre::DistanceLodStrategyBase::transformUserValue ( Real  userValue ) const

overridevirtual

Transform user supplied value to internal value.

By default, performs no transformation.

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.

getIndex() [1/2]

ushort Ogre::DistanceLodStrategyBase::getIndex ( Real  value, const Mesh::MeshLodUsageList &  meshLodUsageList  ) const

overridevirtual

Get the index of the LOD usage which applies to a given value.

Implements Ogre::LodStrategy.

getIndex() [2/2]

ushort Ogre::DistanceLodStrategyBase::getIndex ( Real  value, const Material::LodValueList &  materialLodValueList  ) const

overridevirtual

Get the index of the LOD usage which applies to a given value.

Implements Ogre::LodStrategy.

sort()

void Ogre::DistanceLodStrategyBase::sort ( Mesh::MeshLodUsageList &  meshLodUsageList ) const

overridevirtual

Sort mesh LOD usage list from greatest to least detail.

Implements Ogre::LodStrategy.

isSorted()

bool Ogre::DistanceLodStrategyBase::isSorted ( const Mesh::LodValueList &  values ) const

overridevirtual

Determine if the LOD values are sorted from greatest detail to least detail.

Implements Ogre::LodStrategy.

getSquaredDepth()

virtual Real Ogre::DistanceLodStrategyBase::getSquaredDepth ( const MovableObject *  movableObject, const Ogre::Camera *  camera  ) const

pure virtual

Get the squared distance between the camera and the LOD object.

Implemented in Ogre::DistanceLodBoxStrategy, and Ogre::DistanceLodSphereStrategy.

setReferenceView()

void Ogre::DistanceLodStrategyBase::setReferenceView	(	Real	viewportWidth,
		Real	viewportHeight,
		Radian	fovY
	)

Sets the reference view upon which the distances were based.

Note

This automatically enables use of the reference view.

There is no corresponding get method for these values as they are not saved, but used to compute a reference value.

setReferenceViewEnabled()

void Ogre::DistanceLodStrategyBase::setReferenceViewEnabled

(

bool

value

)

Enables to disables use of the reference view.

Note

Do not enable use of the reference view before setting it.

isReferenceViewEnabled()

bool Ogre::DistanceLodStrategyBase::isReferenceViewEnabled

(

)

const

Determine if use of the reference view is enabled.

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

• OgreDistanceLodStrategy.h