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osgUtil::TangentSpaceGenerator Class Reference

Inheritance diagram for osgUtil::TangentSpaceGenerator:

osg::Referenced 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::Vec4ArraygetTangentArray ()
const osg::Vec4ArraygetTangentArray () const
void setTangentArray (osg::Vec4Array *array)
osg::Vec4ArraygetNormalArray ()
const osg::Vec4ArraygetNormalArray () const
void setNormalArray (osg::Vec4Array *array)
osg::Vec4ArraygetBinormalArray ()
const osg::Vec4ArraygetBinormalArray () const
void setBinormalArray (osg::Vec4Array *array)
osg::IndexArraygetIndices ()

Protected Member Functions

virtual ~TangentSpaceGenerator ()
TangentSpaceGeneratoroperator= (const TangentSpaceGenerator &)
void compute_basis_vectors (osg::PrimitiveSet *pset, const osg::Array *vx, const osg::Array *nx, const osg::Array *tx, const osg::IndexArray *vix, const osg::IndexArray *nix, const osg::IndexArray *tix, int iA, int iB, int iC)

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.


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]
 


Member Function Documentation

void osgUtil::TangentSpaceGenerator::compute_basis_vectors osg::PrimitiveSet pset,
const osg::Array vx,
const osg::Array nx,
const osg::Array tx,
const osg::IndexArray vix,
const osg::IndexArray nix,
const osg::IndexArray tix,
int  iA,
int  iB,
int  iC
[protected]
 

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

const osg::Vec4Array* osgUtil::TangentSpaceGenerator::getBinormalArray  )  const [inline]
 

osg::Vec4Array* osgUtil::TangentSpaceGenerator::getBinormalArray  )  [inline]
 

osg::IndexArray* osgUtil::TangentSpaceGenerator::getIndices  )  [inline]
 

const osg::Vec4Array* osgUtil::TangentSpaceGenerator::getNormalArray  )  const [inline]
 

osg::Vec4Array* osgUtil::TangentSpaceGenerator::getNormalArray  )  [inline]
 

const osg::Vec4Array* osgUtil::TangentSpaceGenerator::getTangentArray  )  const [inline]
 

osg::Vec4Array* osgUtil::TangentSpaceGenerator::getTangentArray  )  [inline]
 

TangentSpaceGenerator& osgUtil::TangentSpaceGenerator::operator= const TangentSpaceGenerator  )  [inline, protected]
 

void osgUtil::TangentSpaceGenerator::setBinormalArray osg::Vec4Array array  )  [inline]
 

void osgUtil::TangentSpaceGenerator::setNormalArray osg::Vec4Array array  )  [inline]
 

void osgUtil::TangentSpaceGenerator::setTangentArray osg::Vec4Array array  )  [inline]
 


The documentation for this class was generated from the following file:
Generated on Wed Jun 7 08:31:09 2006 for OpenSceneGraph by  doxygen 1.4.4