Provides an algorithm for scaling objects in the scene. It provides a container for the scale factor (and max scale factor if needed) to use, and then provides the interface for a const method to calculate the actual scale factor based on object and camera positions and object size. Instances of DtScalingAlgorithm are created by the DtScalingAlgorithmFactory, which are in turn provided to a DtModelScaler. The DtModelScaler is the interface used by the Cull visitor, instance manager, and intersector classes to scale objects as desired.

Inheritance diagram for makVrv::DtScalingAlgorithm:

[legend]

Public Member Functions
	DtScalingAlgorithm ()

virtual	~DtScalingAlgorithm ()

virtual double	calculateScale (const DtOsgCullVisitorParameters &info, const osg::Camera &camera, const osg::Vec3d &position, double modelRadius, DtUniqueID objectElementId) const =0

virtual double	scaleFactor () const

virtual void	setScaleFactor (double maxScale)

virtual double	maxScaleFactor () const

virtual void	setMaxScaleFactor (double maxScale)

Protected Attributes
double	myScaleFactor

double	myMaxScaleFactor

Private Member Functions
DtScalingAlgorithm &	operator= (const DtScalingAlgorithm &rhs)

	DtScalingAlgorithm (const DtScalingAlgorithm &orig)

Constructor & Destructor Documentation

makVrv::DtScalingAlgorithm::DtScalingAlgorithm ( )

CTOR.

virtual makVrv::DtScalingAlgorithm::~DtScalingAlgorithm ( )

virtual

DTOR.

makVrv::DtScalingAlgorithm::DtScalingAlgorithm ( const DtScalingAlgorithm & orig )

private

Member Function Documentation

virtual double makVrv::DtScalingAlgorithm::calculateScale	(	const DtOsgCullVisitorParameters &	info,
		const osg::Camera &	camera,
		const osg::Vec3d &	position,
		double	modelRadius,
		DtUniqueID	objectElementId
	)		const

pure virtual

Calculate the scale factor for an object in the scene.

Parameters

[in]	info	is the cull visitor parameters object, which contains the current scale factor setting, as well as other potentially useful information for a scaling algorithm.
[in]	camera	is the current cull or intersector camera, from which the eyepoint can be found, as well as the viewport, model view and projection matrices, if desired.
[in]	position	is the position of the object to be scaled
[in]	modelRadius	is the bounding radius of the object to be scaled
[in]	objectElementId	is the element ID of the object being scaled, if it exists - check first for (DtUniqueID)0. This can be used to find other information about the object being scaled, if needed.

Returns: the amount to scale the object

Implemented in makVrv::DtXRScalingAlgorithm, and makVrv::DtLinearScalingAlgorithm.

virtual double makVrv::DtScalingAlgorithm::scaleFactor ( ) const

virtual

Get the scale factor for this algorithm to use.

virtual void makVrv::DtScalingAlgorithm::setScaleFactor ( double maxScale )

virtual

Set the scale factor for this algorithm to use. This is set by the channel using the current observer mode's scale factor setting.

virtual double makVrv::DtScalingAlgorithm::maxScaleFactor ( ) const

virtual

Get the maximum scale factor for this algorithm to use.

virtual void makVrv::DtScalingAlgorithm::setMaxScaleFactor ( double maxScale )

virtual

Set the maximum scale factor for this algorithm to use. This is set by the channel using the current observer mode's max scale factor setting.

DtScalingAlgorithm& makVrv::DtScalingAlgorithm::operator= ( const DtScalingAlgorithm & rhs )

private

Unimplemented Assignment Operator.

Member Data Documentation

double makVrv::DtScalingAlgorithm::myScaleFactor

protected

double makVrv::DtScalingAlgorithm::myMaxScaleFactor

protected

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

/data/exports/nrhent7-1/nightly/docs/vrForces.vrf5-0-branch/include/vrvOsg/DtScalingAlgorithm.h

Public Member Functions

Protected Attributes

Private Member Functions

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation