vhdOSG::TangentSpaceGenerator Class Reference

#include <TangentSpaceGenerator.h>

List of all members.

Public Member Functions
	TangentSpaceGenerator ()
	TangentSpaceGenerator (const TangentSpaceGenerator &copy, const osg::CopyOp &copyop=osg::CopyOp::SHALLOW_COPY)
void	generate (osg::Geometry *geo, int normal_map_tex_unit=0)
osg::Vec4Array *	getTangentArray ()
const osg::Vec4Array *	getTangentArray () const
void	setTangentArray (osg::Vec4Array *array)
osg::Vec4Array *	getNormalArray ()
const osg::Vec4Array *	getNormalArray () const
void	setNormalArray (osg::Vec4Array *array)
osg::Vec4Array *	getBinormalArray ()
const osg::Vec4Array *	getBinormalArray () const
void	setBinormalArray (osg::Vec4Array *array)
void	setDebugInfo (bool flag)
Protected Member Functions
virtual	~TangentSpaceGenerator ()
TangentSpaceGenerator &	operator= (const TangentSpaceGenerator &)
void	compute_basis_vectors (osg::PrimitiveSet *pset, const osg::Array *vx, const osg::Array *tx, int iA, int iB, int iC, const osg::IndexArray *vxIndices=NULL, const osg::IndexArray *txIndices=NULL)
Private Attributes
osg::ref_ptr< osg::Vec4Array >	T_
osg::ref_ptr< osg::Vec4Array >	B_
osg::ref_ptr< osg::Vec4Array >	N_
bool	debugInfo

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Detailed Description

This class generates three arrays containing tangent-space basis vectors. It takes a texture-mapped Geometry object as input, traverses its primitive sets and computes Tangent, Normal and Binormal vectors for each vertex, storing them into arrays. The resulting arrays can be used as vertex program varying (per-vertex) parameters, enabling advanced effects like bump-mapping. To use this class, simply call the generate() method specifying the Geometry object you want to process and the texture unit that contains UV mapping for the normal map; then you can retrieve the TBN arrays by calling getTangentArray(), getNormalArray() and getBinormalArray() methods.

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Constructor & Destructor Documentation

TangentSpaceGenerator::TangentSpaceGenerator

(

)

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

virtual vhdOSG::TangentSpaceGenerator::~TangentSpaceGenerator

(

)

[inline, protected, virtual]

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Member Function Documentation

void TangentSpaceGenerator::generate	(	osg::Geometry *	geo,
		int	normal_map_tex_unit = 0
	)

osg::Vec4Array* vhdOSG::TangentSpaceGenerator::getTangentArray

(

)

[inline]

const osg::Vec4Array* vhdOSG::TangentSpaceGenerator::getTangentArray

(

)

const [inline]

void vhdOSG::TangentSpaceGenerator::setTangentArray

(

osg::Vec4Array *

array

)

[inline]

osg::Vec4Array* vhdOSG::TangentSpaceGenerator::getNormalArray

(

)

[inline]

const osg::Vec4Array* vhdOSG::TangentSpaceGenerator::getNormalArray

(

)

const [inline]

void vhdOSG::TangentSpaceGenerator::setNormalArray

(

osg::Vec4Array *

array

)

[inline]

osg::Vec4Array* vhdOSG::TangentSpaceGenerator::getBinormalArray

(

)

[inline]

const osg::Vec4Array* vhdOSG::TangentSpaceGenerator::getBinormalArray

(

)

const [inline]

void vhdOSG::TangentSpaceGenerator::setBinormalArray

(

osg::Vec4Array *

array

)

[inline]

void vhdOSG::TangentSpaceGenerator::setDebugInfo

(

bool

flag

)

[inline]

TangentSpaceGenerator& vhdOSG::TangentSpaceGenerator::operator=

(

const TangentSpaceGenerator &

)

[inline, protected]

void vhdOSG::TangentSpaceGenerator::compute_basis_vectors	(	osg::PrimitiveSet *	pset,
		const osg::Array *	vx,
		const osg::Array *	tx,
		int	iA,
		int	iB,
		int	iC,
		const osg::IndexArray *	vxIndices = NULL,
		const osg::IndexArray *	txIndices = NULL
	)			[protected]

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Member Data Documentation

osg::ref_ptr<osg::Vec4Array> vhdOSG::TangentSpaceGenerator::T_ [private]

osg::ref_ptr<osg::Vec4Array> vhdOSG::TangentSpaceGenerator::B_ [private]

osg::ref_ptr<osg::Vec4Array> vhdOSG::TangentSpaceGenerator::N_ [private]

bool vhdOSG::TangentSpaceGenerator::debugInfo [private]

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