Tool class for detection of self-sections in the given shape. This class is based on BRepExtrema_OverlapTool and thus uses shape tessellation to detect incorrect mesh fragments (pairs of overlapped triangles belonging to different faces). Thus, a result depends critically on the quality of mesh generator (e.g., BREP mesh is not always a good choice, because it can contain gaps between adjacent face triangulations, which may not share vertices on common edge; thus false overlap can be detected). As a result, this tool can be used for relatively fast approximated test which provides sub-set of potentially overlapped faces. More...

#include <BRepExtrema_SelfIntersection.hxx>

Inheritance diagram for BRepExtrema_SelfIntersection:

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Public Member Functions
	BRepExtrema_SelfIntersection (const Standard_Real theTolerance=0.0)
	Creates unitialized self-intersection tool. More...

	BRepExtrema_SelfIntersection (const TopoDS_Shape &theShape, const Standard_Real theTolerance=0.0)
	Creates self-intersection tool for the given shape. More...

Standard_Real	Tolerance () const
	Returns tolerance value used for self-intersection test. More...

void	SetTolerance (const Standard_Real theTolerance)
	Sets tolerance value used for self-intersection test. More...

Standard_Boolean	LoadShape (const TopoDS_Shape &theShape)
	Loads shape for detection of self-intersections. More...

void	Perform ()
	Performs detection of self-intersections. More...

Standard_Boolean	IsDone () const
	True if the detection is completed. More...

const BRepExtrema_MapOfIntegerPackedMapOfInteger &	OverlapElements () const
	Returns set of IDs of overlapped sub-shapes (started from 0). More...

const TopoDS_Face &	GetSubShape (const Standard_Integer theID) const
	Returns sub-shape from the shape for the given index (started from 0). More...

const Handle< BRepExtrema_TriangleSet > &	ElementSet () const
	Returns set of all the face triangles of the shape. More...

Public Member Functions inherited from BRepExtrema_ElementFilter
virtual	~BRepExtrema_ElementFilter ()
	Releases resources of element filter. More...

Protected Member Functions
virtual BRepExtrema_ElementFilter::FilterResult	PreCheckElements (const Standard_Integer theIndex1, const Standard_Integer theIndex2)
	Filter out correct adjacent mesh elements. More...

BRepExtrema_ElementFilter::FilterResult	isRegularSharedVertex (const BVH_Vec3d &theSharedVert, const BVH_Vec3d &theTrng1Vtxs1, const BVH_Vec3d &theTrng1Vtxs2, const BVH_Vec3d &theTrng2Vtxs1, const BVH_Vec3d &theTrng2Vtxs2)
	Checks if the given triangles have only single common vertex. More...

BRepExtrema_ElementFilter::FilterResult	isRegularSharedEdge (const BVH_Vec3d &theTrng1Vtxs0, const BVH_Vec3d &theTrng1Vtxs1, const BVH_Vec3d &theTrng1Vtxs2, const BVH_Vec3d &theTrng2Vtxs2)
	Checks if the given triangles have only single common edge. More...

Additional Inherited Members
Public Types inherited from BRepExtrema_ElementFilter
enum	FilterResult { NoCheck, Overlap, DoCheck }
	Result of filtering function. More...

Detailed Description

Tool class for detection of self-sections in the given shape. This class is based on BRepExtrema_OverlapTool and thus uses shape tessellation to detect incorrect mesh fragments (pairs of overlapped triangles belonging to different faces). Thus, a result depends critically on the quality of mesh generator (e.g., BREP mesh is not always a good choice, because it can contain gaps between adjacent face triangulations, which may not share vertices on common edge; thus false overlap can be detected). As a result, this tool can be used for relatively fast approximated test which provides sub-set of potentially overlapped faces.

Constructor & Destructor Documentation

BRepExtrema_SelfIntersection::BRepExtrema_SelfIntersection ( const Standard_Real theTolerance = 0.0 )

Creates unitialized self-intersection tool.

BRepExtrema_SelfIntersection::BRepExtrema_SelfIntersection	(	const TopoDS_Shape &	theShape,
		const Standard_Real	theTolerance = `0.0`
	)

Creates self-intersection tool for the given shape.

Member Function Documentation

const Handle< BRepExtrema_TriangleSet >& BRepExtrema_SelfIntersection::ElementSet ( ) const

inline

Returns set of all the face triangles of the shape.

const TopoDS_Face& BRepExtrema_SelfIntersection::GetSubShape ( const Standard_Integer theID ) const

inline

Returns sub-shape from the shape for the given index (started from 0).

Standard_Boolean BRepExtrema_SelfIntersection::IsDone ( ) const

inline

True if the detection is completed.

BRepExtrema_ElementFilter::FilterResult BRepExtrema_SelfIntersection::isRegularSharedEdge	(	const BVH_Vec3d &	theTrng1Vtxs0,
		const BVH_Vec3d &	theTrng1Vtxs1,
		const BVH_Vec3d &	theTrng1Vtxs2,
		const BVH_Vec3d &	theTrng2Vtxs2
	)

protected

Checks if the given triangles have only single common edge.

BRepExtrema_ElementFilter::FilterResult BRepExtrema_SelfIntersection::isRegularSharedVertex	(	const BVH_Vec3d &	theSharedVert,
		const BVH_Vec3d &	theTrng1Vtxs1,
		const BVH_Vec3d &	theTrng1Vtxs2,
		const BVH_Vec3d &	theTrng2Vtxs1,
		const BVH_Vec3d &	theTrng2Vtxs2
	)

protected

Checks if the given triangles have only single common vertex.

Standard_Boolean BRepExtrema_SelfIntersection::LoadShape ( const TopoDS_Shape & theShape )

Loads shape for detection of self-intersections.

const BRepExtrema_MapOfIntegerPackedMapOfInteger& BRepExtrema_SelfIntersection::OverlapElements ( ) const

inline

Returns set of IDs of overlapped sub-shapes (started from 0).

void BRepExtrema_SelfIntersection::Perform ( )

Performs detection of self-intersections.

virtual BRepExtrema_ElementFilter::FilterResult BRepExtrema_SelfIntersection::PreCheckElements	(	const Standard_Integer	theIndex1,
		const Standard_Integer	theIndex2
	)

protectedvirtual

Filter out correct adjacent mesh elements.

Reimplemented from BRepExtrema_ElementFilter.

void BRepExtrema_SelfIntersection::SetTolerance ( const Standard_Real theTolerance )

inline

Sets tolerance value used for self-intersection test.

Standard_Real BRepExtrema_SelfIntersection::Tolerance ( ) const

inline

Returns tolerance value used for self-intersection test.

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

BRepExtrema_SelfIntersection.hxx

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation