SurgSim::Graphics::GenerateTangentSpaceTriangleIndexFunctor Class Reference

Triangle index functor which calculates the tangent space basis vectors for the vertices of a geometry from texture coordinates. More...

#include <TangentSpaceGenerator.h>

Public Member Functions
	GenerateTangentSpaceTriangleIndexFunctor ()
	Constructor.
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 ()
void	set (const osg::Vec3Array *vertexArray, const osg::Vec3Array *normalArray, const osg::Vec2Array *textureCoordArray, osg::Vec4Array *tangentArray, osg::Vec4Array *bitangentArray)
	Sets the arrays required to generate tangent space basis vectors. More...
void	orthogonalize ()
	Orthogonalize and normalize the calculated tangent space basis vectors.
void	reset ()
	Resets all calculated tangent space basis vectors to 0.
void	operator() (unsigned int vertexIndex1, unsigned int vertexIndex2, unsigned int vertexIndex3)
	Calculates the triangle tangent space basis vectors and adds it to each adjacent vertex's tangent. More...

Detailed Description

Triangle index functor which calculates the tangent space basis vectors for the vertices of a geometry from texture coordinates.

Member Function Documentation

getBasisOrthonormality()

bool SurgSim::Graphics::GenerateTangentSpaceTriangleIndexFunctor::getBasisOrthonormality

(

)

Returns

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

operator()()

void SurgSim::Graphics::GenerateTangentSpaceTriangleIndexFunctor::operator()	(	unsigned int	vertexIndex1,
		unsigned int	vertexIndex2,
		unsigned int	vertexIndex3
	)

Calculates the triangle tangent space basis vectors and adds it to each adjacent vertex's tangent.

Parameters

vertexIndex1	First triangle vertex index
vertexIndex2	Second triangle vertex index
vertexIndex3	Third triangle vertex index

set()

void SurgSim::Graphics::GenerateTangentSpaceTriangleIndexFunctor::set	(	const osg::Vec3Array *	vertexArray,
		const osg::Vec3Array *	normalArray,
		const osg::Vec2Array *	textureCoordArray,
		osg::Vec4Array *	tangentArray,
		osg::Vec4Array *	bitangentArray
	)

Sets the arrays required to generate tangent space basis vectors.

Parameters

vertexArray	Array containing vertex positions
normalArray	Array containing vertex normals
textureCoordArray	Array containing texture coordinates
tangentArray	Array to store calculated tangents
bitangentArray	Array to store calculated bitangents

setBasisOrthonormality()

void SurgSim::Graphics::GenerateTangentSpaceTriangleIndexFunctor::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

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

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