Inheritance diagram for osgShadow::OccluderGeometry:

Classes
struct	Edge
Public Types
typedef std::vector< osg::Vec3 >	Vec3List
typedef std::vector< GLuint >	UIntList
Public Member Functions
	OccluderGeometry ()
	OccluderGeometry (const OccluderGeometry &oc, const osg::CopyOp &copyop=osg::CopyOp::SHALLOW_COPY)
virtual Object *	cloneType () const
virtual Object *	clone (const osg::CopyOp &copyop) const
virtual bool	isSameKindAs (const osg::Object *obj) const
virtual const char *	libraryName () const
virtual const char *	className () const
void	computeOccluderGeometry (osg::Node subgraph, osg::Matrix matrix=0, float sampleRatio=1.0f)
void	computeOccluderGeometry (osg::Drawable drawable, osg::Matrix matrix=0, float sampleRatio=1.0f)
void	computeShadowVolumeGeometry (const osg::Vec4 &lightpos, ShadowVolumeGeometry &svg) const
void	setBoundingPolytope (const osg::Polytope &polytope)
osg::Polytope &	getBoundingPolytope ()
const osg::Polytope &	getBoundingPolytope () const
virtual void	drawImplementation (osg::RenderInfo &renderInfo) const
virtual osg::BoundingBox	computeBound () const
void	processGeometry (osg::Drawable drawable, osg::Matrix matrix=0, float sampleRatio=1.0f)
Protected Types
typedef std::vector< Edge >	EdgeList
Protected Member Functions
virtual	~OccluderGeometry ()
bool	isLightPointSilhouetteEdge (const osg::Vec3 &lightpos, const Edge &edge) const
bool	isLightDirectionSilhouetteEdge (const osg::Vec3 &lightdirection, const Edge &edge) const
void	setUpInternalStructures ()
void	removeDuplicateVertices ()
void	removeNullTriangles ()
void	computeNormals ()
void	buildEdgeMaps ()
void	computeLightDirectionSilhouetteEdges (const osg::Vec3 &lightdirection, UIntList &silhouetteIndices) const
void	computeLightPositionSilhouetteEdges (const osg::Vec3 &lightpos, UIntList &silhouetteIndices) const
Protected Attributes
osg::Polytope	_boundingPolytope
Vec3List	_vertices
Vec3List	_normals
Vec3List	_triangleNormals
UIntList	_triangleIndices
EdgeList	_edges

Detailed Description

OccluderGeometry provides a sepecialised geometry representation of objects in scene that occlude light and therefore cast shadows. OccluderGeometry supports the computation of silhouette edges and shadow volume geometries, as well as use as geometry that one can rendering into a shadow map or end caps for the ZP+ algorithm. OccluderGeometry may be of the same resolution as an underlying geometry that it represents, or can be of lower resolution and combine manager seperate geometries together into a single shadow casting object. OccluderGeometry may be attached as UserData to Nodes or to Drawables.

Member Typedef Documentation

typedef std::vector<Edge> osgShadow::OccluderGeometry::EdgeList [protected]

typedef std::vector<GLuint> osgShadow::OccluderGeometry::UIntList

typedef std::vector<osg::Vec3> osgShadow::OccluderGeometry::Vec3List

Constructor & Destructor Documentation

osgShadow::OccluderGeometry::OccluderGeometry ( )

osgShadow::OccluderGeometry::OccluderGeometry	(	const OccluderGeometry &	oc,
		const osg::CopyOp &	copyop = `osg::CopyOp::SHALLOW_COPY`
	)

virtual osgShadow::OccluderGeometry::~OccluderGeometry ( ) [inline, protected, virtual]

Member Function Documentation

void osgShadow::OccluderGeometry::buildEdgeMaps ( ) [protected]

virtual const char* osgShadow::OccluderGeometry::className ( ) const [inline, virtual]

return the name of the object's class type. Must be defined by derived classes.

Reimplemented from osg::Drawable.

virtual Object* osgShadow::OccluderGeometry::clone ( const osg::CopyOp & ) const [inline, virtual]

Clone an object, with Object* return type. Must be defined by derived classes.

Implements osg::Object.

virtual Object* osgShadow::OccluderGeometry::cloneType ( ) const [inline, virtual]

Clone the type of an object, with Object* return type. Must be defined by derived classes.

Implements osg::Object.

virtual osg::BoundingBox osgShadow::OccluderGeometry::computeBound ( ) const [virtual]

Compute the bounding box around occluder geometry.

Reimplemented from osg::Drawable.

void osgShadow::OccluderGeometry::computeLightDirectionSilhouetteEdges	(	const osg::Vec3 &	lightdirection,
		UIntList &	silhouetteIndices
	)		const `[protected]`

void osgShadow::OccluderGeometry::computeLightPositionSilhouetteEdges	(	const osg::Vec3 &	lightpos,
		UIntList &	silhouetteIndices
	)		const `[protected]`

void osgShadow::OccluderGeometry::computeNormals ( ) [protected]

void osgShadow::OccluderGeometry::computeOccluderGeometry	(	osg::Node *	subgraph,
		osg::Matrix *	matrix = `0`,
		float	sampleRatio = `1.0f`
	)

Compute an occluder geometry containing all the geometry in specified subgraph.

void osgShadow::OccluderGeometry::computeOccluderGeometry	(	osg::Drawable *	drawable,
		osg::Matrix *	matrix = `0`,
		float	sampleRatio = `1.0f`
	)

Compute an occluder geometry containing the geometry in specified drawable.

void osgShadow::OccluderGeometry::computeShadowVolumeGeometry	(	const osg::Vec4 &	lightpos,
		ShadowVolumeGeometry &	svg
	)		const

Compute ShadowVolumeGeometry.

virtual void osgShadow::OccluderGeometry::drawImplementation ( osg::RenderInfo & renderInfo ) const [virtual]

Render the occluder geometry.

Implements osg::Drawable.

osg::Polytope& osgShadow::OccluderGeometry::getBoundingPolytope ( ) [inline]

Get the bounding polytope of the OccluderGeometry.

const osg::Polytope& osgShadow::OccluderGeometry::getBoundingPolytope ( ) const [inline]

Get the const bounding polytope of the OccluderGeometry.

bool osgShadow::OccluderGeometry::isLightDirectionSilhouetteEdge	(	const osg::Vec3 &	lightdirection,
		const Edge &	edge
	)		const `[inline, protected]`

References osgShadow::OccluderGeometry::Edge::_t1, osgShadow::OccluderGeometry::Edge::_t2, and osgShadow::OccluderGeometry::Edge::boundaryEdge().

bool osgShadow::OccluderGeometry::isLightPointSilhouetteEdge	(	const osg::Vec3 &	lightpos,
		const Edge &	edge
	)		const `[inline, protected]`

References osgShadow::OccluderGeometry::Edge::_p1, osgShadow::OccluderGeometry::Edge::_t1, osgShadow::OccluderGeometry::Edge::_t2, osgShadow::OccluderGeometry::Edge::boundaryEdge(), and osg::Vec3f::normalize().

virtual bool osgShadow::OccluderGeometry::isSameKindAs ( const osg::Object * obj ) const [inline, virtual]

Reimplemented from osg::Drawable.

References NULL.

virtual const char* osgShadow::OccluderGeometry::libraryName ( ) const [inline, virtual]

return the name of the object's library. Must be defined by derived classes. The OpenSceneGraph convention is that the namespace of a library is the same as the library name.

Reimplemented from osg::Drawable.