SurgSim::Graphics::TangentSpaceGenerator Class Reference

Node visitor which calculates the tangent space basis vectors from the texture coordinates of any geometry it encounters. More...

#include <SurgSim/Graphics/TangentSpaceGenerator.h>

Inheritance diagram for SurgSim::Graphics::TangentSpaceGenerator:

Public Member Functions
	TangentSpaceGenerator (int textureCoordUnit, int tangentAttribIndex, int bitangentAttribIndex)
	Constructor. More...
virtual	~TangentSpaceGenerator ()
	Destructor. More...
void	setBasisOrthonormality (bool orthonormal)
	Sets whether the three tangent space basis vectors are made to be orthonormal; otherwise, each tangent is separately orthonormal to the normal, but not to each other. More...
bool	getBasisOrthonormality ()
	Gets whether the three tangent space basis vectors are made to be orthonormal; otherwise, each tangent is separately orthonormal to the normal, but not to each other. More...
void	apply (osg::Geode &geode) override
	Generates tangent space vectors for all geometry in the geode. More...

Static Public Member Functions
static void	generateTangentSpace (osg::Geometry *geometry, int textureCoordUnit, int tangentAttribIndex, int bitangentAttribIndex, bool orthonormal)
	Generates tangent space basis vectors for the geometry. More...

Private Attributes
int	m_textureCoordUnit
	Texture unit of texture coordinates to use for calculating the tangent space. More...
int	m_tangentAttribIndex
	Index of the vertex attribute array to store the calculated tangents. More...
int	m_bitangentAttribIndex
	Index of the vertex attribute array to store the calculated bitangents. More...
bool	m_createOrthonormalBasis
	Whether or not to create a fully orthonormal basis; otherwise, each tangent is separately orthonormal to the normal, but not to each other. More...

Detailed Description

Node visitor which calculates the tangent space basis vectors from the texture coordinates of any geometry it encounters.

Constructor & Destructor Documentation

TangentSpaceGenerator()

SurgSim::Graphics::TangentSpaceGenerator::TangentSpaceGenerator	(	int	textureCoordUnit,
		int	tangentAttribIndex,
		int	bitangentAttribIndex
	)

Constructor.

Parameters

textureCoordUnit	Texture unit of texture coordinates to use for calculating the tangent space
tangentAttribIndex	Index of the vertex attribute array to store the calculated tangents
bitangentAttribIndex	Index of the vertex attribute array to store the calculated bitangents

~TangentSpaceGenerator()

SurgSim::Graphics::TangentSpaceGenerator::~TangentSpaceGenerator ( )

virtual

Destructor.

Member Function Documentation

apply()

void SurgSim::Graphics::TangentSpaceGenerator::apply ( osg::Geode &  geode )

override

Generates tangent space vectors for all geometry in the geode.

Parameters

geode

Geode to generate tangent space vectors

generateTangentSpace()

void SurgSim::Graphics::TangentSpaceGenerator::generateTangentSpace ( osg::Geometry *  geometry, int  textureCoordUnit, int  tangentAttribIndex, int  bitangentAttribIndex, bool  orthonormal  )

static

Generates tangent space basis vectors for the geometry.

Parameters

geometry	Geometry to generate normals
textureCoordUnit	Texture unit of texture coordinates to use for calculating the tangent space
tangentAttribIndex	Index of the vertex attribute array to store the calculated tangents
bitangentAttribIndex	Index of the vertex attribute array to store the calculated bi-tangents
orthonormal	Whether or not to create a fully orthonormal basis; otherwise, each tangent is separately orthonormal to the normal, but not to each other

getBasisOrthonormality()

bool SurgSim::Graphics::TangentSpaceGenerator::getBasisOrthonormality

(

)

Gets whether the three tangent space basis vectors are made to be orthonormal; otherwise, each tangent is separately orthonormal to the normal, but not to each other.

setBasisOrthonormality()

void SurgSim::Graphics::TangentSpaceGenerator::setBasisOrthonormality

(

bool

orthonormal

)

Sets whether the three tangent space basis vectors are made to be orthonormal; otherwise, each tangent is separately orthonormal to the normal, but not to each other.

Parameters

orthonormal

Whether or not to create a fully orthonormal basis

Member Data Documentation

m_bitangentAttribIndex

int SurgSim::Graphics::TangentSpaceGenerator::m_bitangentAttribIndex

private

Index of the vertex attribute array to store the calculated bitangents.

m_createOrthonormalBasis

bool SurgSim::Graphics::TangentSpaceGenerator::m_createOrthonormalBasis

private

Whether or not to create a fully orthonormal basis; otherwise, each tangent is separately orthonormal to the normal, but not to each other.

m_tangentAttribIndex

int SurgSim::Graphics::TangentSpaceGenerator::m_tangentAttribIndex

private

Index of the vertex attribute array to store the calculated tangents.

m_textureCoordUnit

int SurgSim::Graphics::TangentSpaceGenerator::m_textureCoordUnit

private

Texture unit of texture coordinates to use for calculating the tangent space.

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

• SurgSim/Graphics/TangentSpaceGenerator.h
• SurgSim/Graphics/TangentSpaceGenerator.cpp