osgUtil::TangentSpaceGenerator Class Reference

The TangentSpaceGenerator class generates three arrays containing tangent-space basis vectors. More...

Inheritance diagram for osgUtil::TangentSpaceGenerator:

[legend]

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)
osg::IndexArray *	getIndices ()
Protected Member Functions
virtual	~TangentSpaceGenerator ()
TangentSpaceGenerator &	operator= (const TangentSpaceGenerator &)
void	compute (osg::PrimitiveSet *pset, const osg::Array *vx, const osg::Array *nx, const osg::Array *tx, int iA, int iB, int iC)
Protected Attributes
osg::ref_ptr < osg::Vec4Array >	T_
osg::ref_ptr < osg::Vec4Array >	B_
osg::ref_ptr < osg::Vec4Array >	N_
osg::ref_ptr < osg::UIntArray >	indices_

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Detailed Description

The TangentSpaceGenerator 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

osgUtil::TangentSpaceGenerator::TangentSpaceGenerator

(

)

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

virtual osgUtil::TangentSpaceGenerator::~TangentSpaceGenerator

(

)

[inline, protected, virtual]

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Member Function Documentation

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

osg::Vec4Array* osgUtil::TangentSpaceGenerator::getTangentArray

(

)

[inline]

const osg::Vec4Array* osgUtil::TangentSpaceGenerator::getTangentArray

(

)

const [inline]

void osgUtil::TangentSpaceGenerator::setTangentArray

(

osg::Vec4Array *

array

)

[inline]

osg::Vec4Array* osgUtil::TangentSpaceGenerator::getNormalArray

(

)

[inline]

const osg::Vec4Array* osgUtil::TangentSpaceGenerator::getNormalArray

(

)

const [inline]

void osgUtil::TangentSpaceGenerator::setNormalArray

(

osg::Vec4Array *

array

)

[inline]

osg::Vec4Array* osgUtil::TangentSpaceGenerator::getBinormalArray

(

)

[inline]

const osg::Vec4Array* osgUtil::TangentSpaceGenerator::getBinormalArray

(

)

const [inline]

void osgUtil::TangentSpaceGenerator::setBinormalArray

(

osg::Vec4Array *

array

)

[inline]

osg::IndexArray* osgUtil::TangentSpaceGenerator::getIndices

(

)

[inline]

TangentSpaceGenerator& osgUtil::TangentSpaceGenerator::operator=

(

const TangentSpaceGenerator &

)

[inline, protected]

void osgUtil::TangentSpaceGenerator::compute	(	osg::PrimitiveSet *	pset,
		const osg::Array *	vx,
		const osg::Array *	nx,
		const osg::Array *	tx,
		int	iA,
		int	iB,
		int	iC
	)			[protected]

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Member Data Documentation

osg::ref_ptr<osg::Vec4Array> osgUtil::TangentSpaceGenerator::T_ [protected]

osg::ref_ptr<osg::Vec4Array> osgUtil::TangentSpaceGenerator::B_ [protected]

osg::ref_ptr<osg::Vec4Array> osgUtil::TangentSpaceGenerator::N_ [protected]

osg::ref_ptr<osg::UIntArray> osgUtil::TangentSpaceGenerator::indices_ [protected]

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

• TangentSpaceGenerator

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