Public Member Functions | Protected Member Functions | Protected Attributes

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::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_

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 ( osg::PrimitiveSet *  pset,
const osg::Array *  vx,
const osg::Array *  nx,
const osg::Array *  tx,
int  iA,
int  iB,
int  iC 
) [protected]
void osgUtil::TangentSpaceGenerator::generate ( osg::Geometry *  geo,
int  normal_map_tex_unit = 0 
)
osg::Vec4Array* osgUtil::TangentSpaceGenerator::getBinormalArray (  )  [inline]
const osg::Vec4Array* osgUtil::TangentSpaceGenerator::getBinormalArray (  )  const [inline]
osg::IndexArray* osgUtil::TangentSpaceGenerator::getIndices (  )  [inline]
osg::Vec4Array* osgUtil::TangentSpaceGenerator::getNormalArray (  )  [inline]
const osg::Vec4Array* osgUtil::TangentSpaceGenerator::getNormalArray (  )  const [inline]
osg::Vec4Array* osgUtil::TangentSpaceGenerator::getTangentArray (  )  [inline]
const osg::Vec4Array* osgUtil::TangentSpaceGenerator::getTangentArray (  )  const [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]

Member Data Documentation

osg::ref_ptr<osg::Vec4Array> osgUtil::TangentSpaceGenerator::B_ [protected]
osg::ref_ptr<osg::UIntArray> osgUtil::TangentSpaceGenerator::indices_ [protected]
osg::ref_ptr<osg::Vec4Array> osgUtil::TangentSpaceGenerator::N_ [protected]
osg::ref_ptr<osg::Vec4Array> osgUtil::TangentSpaceGenerator::T_ [protected]
The documentation for this class was generated from the following file:
Generated on Sun Jul 25 2010 17:48:59 for openscenegraph by  doxygen 1.7.1