makVrv::DtSplitBackfacePolyVisitor Class Reference

DtSplitBackfacePolyVisitor identifies two-sided polygons and duplicates the geometry as a set of two single-sided polygons, reversing one set of normals in the process. This is intended to correct some unintended lighting and transparency artifacts that can occur. This visitor splits both transparent and opaque faces unless told to only split transparent, leaving opaque polygons double sided.

Inheritance diagram for makVrv::DtSplitBackfacePolyVisitor:

Public Member Functions
	DtSplitBackfacePolyVisitor (bool transparentOnly=false)
virtual	~DtSplitBackfacePolyVisitor ()
virtual void	apply (osg::Node &node)
virtual void	apply (osg::Geode &geode)
void	processGeometry ()
void	setTransparentOnly (bool enable)
bool	transparentOnly () const

Protected Member Functions
void	splitGeometry (osg::Geode &geode) const
bool	isDoubleSided (const osg::Node &node) const
bool	isTransparentMaterial (const osg::StateSet &ss) const
bool	isTransparentTextures (const osg::StateSet &ss) const
osg::CullFace *	getOrCreateCullFaceAttribute ()

Protected Attributes
osg::ref_ptr< osg::CullFace >	myCullFace
osg::NodeList	myGeodes
bool	myTransparentOnly

Constructor & Destructor Documentation

makVrv::DtSplitBackfacePolyVisitor::DtSplitBackfacePolyVisitor

(

bool

transparentOnly = false

)

Default CTOR.

Parameters

[in]

transparentOnly

is a flag to only split transparent faces.

virtual makVrv::DtSplitBackfacePolyVisitor::~DtSplitBackfacePolyVisitor ( )

virtual

Virtual DTOR.

Member Function Documentation

virtual void makVrv::DtSplitBackfacePolyVisitor::apply ( osg::Node &  node )

virtual

The Visitor apply method used to traverse the scene-graph.

Parameters

[in]

node

is the osg::Node being visited.

Note

Called during scene-graph traversal, do not directly call this function.

virtual void makVrv::DtSplitBackfacePolyVisitor::apply ( osg::Geode &  geode )

virtual

The Visitor apply method used to traverse the scene-graph.

Parameters

[in]

geode

is the osg::Geode being visited.

Note

Called during scene-graph traversal, do not directly call this function.

void makVrv::DtSplitBackfacePolyVisitor::processGeometry

(

)

Split the geometry cached within this visitor.

Note

Must be called after traversing the tree.

void makVrv::DtSplitBackfacePolyVisitor::setTransparentOnly

(

bool

enable

)

Set the visitor to only split transparent polygons, leaving opaque polygons as double sided.

Parameters

[in]

enable

is a flag to only split transparent faces, default is false.

bool makVrv::DtSplitBackfacePolyVisitor::transparentOnly

(

)

const

Get whether the visitor is only splitting transparent polygons.

Return values

true	visitor only splits transparent double-sided polygons.
false	visitor splits all double-sided polygons.

void makVrv::DtSplitBackfacePolyVisitor::splitGeometry ( osg::Geode &  geode ) const

protected

Split the double-sided geometry into two single-sided geometries.

Parameters

[in,out]

geode

is the geode who's geometry will be modified.

bool makVrv::DtSplitBackfacePolyVisitor::isDoubleSided ( const osg::Node &  node ) const

protected

Check the geode for double-sided polygons.

Parameters

[in]

node

is the node to check.

Return values

true	if geometry has double-sided polygons.
false	otherwise.

bool makVrv::DtSplitBackfacePolyVisitor::isTransparentMaterial ( const osg::StateSet &  ss ) const

protected

Check if the material is transparent.

Parameters

[in]

ss

is the state-set to check for transparency.

Return values

true	if there is transparency.
false	otherwise.

bool makVrv::DtSplitBackfacePolyVisitor::isTransparentTextures ( const osg::StateSet &  ss ) const

protected

Check if any texture is transparent.

Parameters

[in]

ss

is the state-set to check for transparency.

Return values

true	if there is transparency.
false	otherwise.

osg::CullFace* makVrv::DtSplitBackfacePolyVisitor::getOrCreateCullFaceAttribute ( )

protected

Get or create a CullFace attribute.

Returns

a CullFace attribute, creating a new one if necessary.

Member Data Documentation

osg::ref_ptr<osg::CullFace> makVrv::DtSplitBackfacePolyVisitor::myCullFace

protected

osg::NodeList makVrv::DtSplitBackfacePolyVisitor::myGeodes

protected

bool makVrv::DtSplitBackfacePolyVisitor::myTransparentOnly

protected

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

• /data/exports/nrhent7-1/nightly/docs/vrForces.vrf5-1-branch/include/vrvOsg/DtSplitBackfacePolyVisitor.h