osgFX::AnisotropicLighting Class Reference

This single-pass effect implements a sort of anisotropic lighting that replaces the standard OpenGL lighting model. More...

Inheritance diagram for osgFX::AnisotropicLighting:

List of all members.

Public Member Functions
	AnisotropicLighting ()
	AnisotropicLighting (const AnisotropicLighting &copy, const osg::CopyOp &copyop=osg::CopyOp::SHALLOW_COPY)
	META_Effect (osgFX, AnisotropicLighting,"Anisotropic Lighting","This single-pass effect implements a sort of anisotropic ""lighting that replaces the standard OpenGL lighting model.\n""The final color of vertices is not computed directly, it is ""the result of a texture lookup on a user-supplied lighting ""image map. A vertex program is used to compute the s and t ""texture coordinates as follows: s = (N dot H) ; t = (N dot L) ""where N is the vertex normal, L is the light-to-vertex vector, ""H is the half-way vector. This is a good example of how you ""can use the State::getInitialViewMatrix() method to retrieve ""the view matrix and perform view-dependant effects without ""fakes of any kind.\n""This effect requires the ARB_vertex_program extension.","Marco Jez")
osg::Image *	getLightingMap ()
	get the lighting map
const osg::Image *	getLightingMap () const
	get the const lighting map
void	setLightingMap (osg::Image *image)
	set the lighting map
int	getLightNumber () const
	get the OpenGL light number
void	setLightNumber (int n)
	set the OpenGL light number that will be used in lighting computations
Protected Member Functions
virtual	~AnisotropicLighting ()
AnisotropicLighting &	operator= (const AnisotropicLighting &)
bool	define_techniques ()
	abstract method to be implemented in derived classes; its purpose if to create the techniques that can be used for obtaining the desired effect.

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Detailed Description

This single-pass effect implements a sort of anisotropic lighting that replaces the standard OpenGL lighting model.

The final color of vertices is not computed directly, it is the result of a texture lookup on a user-supplied lighting image map. A vertex program is used to compute the s and t texture coordinates as follows: s = (N dot H) ; t = (N dot L) where N is the vertex normal, L is the light-to-vertex vector, H is the half-way vector. This is a good example of how you can use the State::getInitialViewMatrix() method to retrieve the view matrix and perform view-dependant effects without fakes of any kind. This effect requires the ARB_vertex_program extension.

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Constructor & Destructor Documentation

osgFX::AnisotropicLighting::AnisotropicLighting

(

)

osgFX::AnisotropicLighting::AnisotropicLighting	(	const AnisotropicLighting &	copy,
		const osg::CopyOp &	copyop = osg::CopyOp::SHALLOW_COPY
	)

virtual osgFX::AnisotropicLighting::~AnisotropicLighting

(

)

[inline, protected, virtual]

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Member Function Documentation

bool osgFX::AnisotropicLighting::define_techniques

(

)

[protected, virtual]

abstract method to be implemented in derived classes; its purpose if to create the techniques that can be used for obtaining the desired effect.

You will usually call addTechnique() inside this method.

Implements osgFX::Effect.

osg::Image * osgFX::AnisotropicLighting::getLightingMap

(

)

[inline]

get the lighting map

const osg::Image * osgFX::AnisotropicLighting::getLightingMap

(

)

const [inline]

get the const lighting map

int osgFX::AnisotropicLighting::getLightNumber

(

)

const [inline]

get the OpenGL light number

osgFX::AnisotropicLighting::META_Effect	(	osgFX	,
		AnisotropicLighting	,
		"Anisotropic Lighting"	,
		"This single-pass effect implements a sort of anisotropic ""lighting that replaces the standard OpenGL lighting model.\n""The final color of vertices is not computed	directly,
		it is""the result of a texture lookup on a user-supplied lighting""image map.A vertex program is used to compute the s and t""texture coordinates as follows:s	= (N dot H) ; t = (N dot L) ""where N is the vertex normal,
		L is the light-to-vertex	vector,
		""H is the half-way vector.This is a good example of how you""can use the State::getInitialViewMatrix() method to retrieve""the view matrix and perform view-dependant effects without""fakes of any kind.\n""This effect requires the ARB_vertex_program extension."	,
		"Marco Jez"
	)

AnisotropicLighting& osgFX::AnisotropicLighting::operator=

(

const AnisotropicLighting &

)

[inline, protected]

void osgFX::AnisotropicLighting::setLightingMap

(

osg::Image *

image

)

[inline]

set the lighting map

void osgFX::AnisotropicLighting::setLightNumber

(

int

n

)

[inline]

set the OpenGL light number that will be used in lighting computations

References osgFX::Effect::dirtyTechniques().

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

• osgFX/AnisotropicLighting