BRepExtrema_SelfIntersection Class Reference

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:

Public Member Functions
	BRepExtrema_SelfIntersection (const double theTolerance=0.0)
	Creates uninitialized self-intersection tool.
	BRepExtrema_SelfIntersection (const TopoDS_Shape &theShape, const double theTolerance=0.0)
	Creates self-intersection tool for the given shape.
double	Tolerance () const
	Returns tolerance value used for self-intersection test.
void	SetTolerance (const double theTolerance)
	Sets tolerance value used for self-intersection test.
bool	LoadShape (const TopoDS_Shape &theShape)
	Loads shape for detection of self-intersections.
void	Perform ()
	Performs detection of self-intersections.
bool	IsDone () const
	True if the detection is completed.
const NCollection_DataMap< int, TColStd_PackedMapOfInteger > &	OverlapElements () const
	Returns set of IDs of overlapped sub-shapes (started from 0).
const TopoDS_Face &	GetSubShape (const int theID) const
	Returns sub-shape from the shape for the given index (started from 0).
const occ::handle< BRepExtrema_TriangleSet > &	ElementSet () const
	Returns set of all the face triangles of the shape.
Public Member Functions inherited from BRepExtrema_ElementFilter
virtual	~BRepExtrema_ElementFilter ()=default
	Releases resources of element filter.

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

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() [1/2]

BRepExtrema_SelfIntersection::BRepExtrema_SelfIntersection

(

const double

theTolerance = 0.0

)

Creates uninitialized self-intersection tool.

BRepExtrema_SelfIntersection() [2/2]

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

Creates self-intersection tool for the given shape.

Member Function Documentation

ElementSet()

const occ::handle< BRepExtrema_TriangleSet > & BRepExtrema_SelfIntersection::ElementSet ( ) const

inline

Returns set of all the face triangles of the shape.

GetSubShape()

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

inline

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

IsDone()

bool BRepExtrema_SelfIntersection::IsDone ( ) const

inline

True if the detection is completed.

isRegularSharedEdge()

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.

isRegularSharedVertex()

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.

LoadShape()

bool BRepExtrema_SelfIntersection::LoadShape

(

const TopoDS_Shape &

theShape

)

Loads shape for detection of self-intersections.

OverlapElements()

const NCollection_DataMap< int, TColStd_PackedMapOfInteger > & BRepExtrema_SelfIntersection::OverlapElements ( ) const

inline

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

Perform()

void BRepExtrema_SelfIntersection::Perform

(

)

Performs detection of self-intersections.

PreCheckElements()

BRepExtrema_ElementFilter::FilterResult BRepExtrema_SelfIntersection::PreCheckElements ( const int theIndex1, const int theIndex2 )

overrideprotectedvirtual

Filter out correct adjacent mesh elements.

Reimplemented from BRepExtrema_ElementFilter.

SetTolerance()

void BRepExtrema_SelfIntersection::SetTolerance ( const double theTolerance )

inline

Sets tolerance value used for self-intersection test.

Tolerance()

double 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