This class is used to handle polyline selection. The main principle of polyline selection algorithm is to split the polygon defined by polyline onto triangles. Than each of them is considered as a base for triangular frustum building. In other words, each triangle vertiex will be projected from 2d screen space to 3d world space onto near and far view frustum planes. Thus, the projected triangles make up the bases of selecting frustum. When the set of such frustums is created, the function determining selection iterates through triangular frustum set and searches for overlap with any frustum. More...

#include <SelectMgr_TriangularFrustumSet.hxx>

Inheritance diagram for SelectMgr_TriangularFrustumSet:

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Public Member Functions
	SelectMgr_TriangularFrustumSet ()

	~SelectMgr_TriangularFrustumSet ()

virtual void	Build (const TColgp_Array1OfPnt2d &thePoints) Standard_OVERRIDE
	Meshes polygon bounded by polyline. Than organizes a set of triangular frustums, where each triangle's projection onto near and far view frustum planes is considered as a frustum base. More...

virtual NCollection_Handle< SelectMgr_BaseFrustum >	ScaleAndTransform (const Standard_Integer theScale, const gp_Trsf &theTrsf) Standard_OVERRIDE
	Returns a copy of the frustum with all sub-volumes transformed according to the matrix given. More...

virtual Standard_Boolean	Overlaps (const SelectMgr_Vec3 &theMinPnt, const SelectMgr_Vec3 &theMaxPnt, Standard_Real &theDepth) Standard_OVERRIDE
	SAT intersection test between defined volume and given axis-aligned box. More...

virtual Standard_Boolean	Overlaps (const SelectMgr_Vec3 &theMinPnt, const SelectMgr_Vec3 &theMaxPnt, Standard_Boolean *theInside) Standard_OVERRIDE
	Returns true if selecting volume is overlapped by axis-aligned bounding box with minimum corner at point theMinPt and maximum at point theMaxPt. More...

virtual Standard_Boolean	Overlaps (const gp_Pnt &thePnt, Standard_Real &theDepth) Standard_OVERRIDE
	Intersection test between defined volume and given point. More...

virtual Standard_Boolean	Overlaps (const Handle< TColgp_HArray1OfPnt > &theArrayOfPnts, Select3D_TypeOfSensitivity theSensType, Standard_Real &theDepth) Standard_OVERRIDE
	SAT intersection test between defined volume and given ordered set of points, representing line segments. The test may be considered of interior part or boundary line defined by segments depending on given sensitivity type. More...

virtual Standard_Boolean	Overlaps (const gp_Pnt &thePnt1, const gp_Pnt &thePnt2, Standard_Real &theDepth) Standard_OVERRIDE
	Checks if line segment overlaps selecting frustum. More...

virtual Standard_Boolean	Overlaps (const gp_Pnt &thePnt1, const gp_Pnt &thePnt2, const gp_Pnt &thePnt3, Select3D_TypeOfSensitivity theSensType, Standard_Real &theDepth) Standard_OVERRIDE
	SAT intersection test between defined volume and given triangle. The test may be considered of interior part or boundary line defined by triangle vertices depending on given sensitivity type. More...

Public Member Functions inherited from SelectMgr_BaseFrustum
	SelectMgr_BaseFrustum ()
	Creates new selecting volume with pixel toletance set to 2, orthographic camera and empty frustum builder. More...

virtual	~SelectMgr_BaseFrustum ()

void	SetCamera (const Handle< Graphic3d_Camera > &theCamera)
	Passes camera projection and orientation matrices to builder. More...

void	SetCamera (const Graphic3d_Mat4d &theProjection, const Graphic3d_Mat4d &theOrientation, const Standard_Integer theIsOrthographic)
	Passes camera projection and orientation matrices to builder. More...

void	SetPixelTolerance (const Standard_Integer theTol)

void	SetWindowSize (const Standard_Integer theWidth, const Standard_Integer theHeight)

void	SetViewport (const Standard_Real theX, const Standard_Real theY, const Standard_Real theWidth, const Standard_Real theHeight)
	Passes viewport parameters to builder. More...

void	SetBuilder (const Handle< SelectMgr_FrustumBuilder > &theBuilder)
	Nullifies the builder created in the constructor and copies the pointer given. More...

virtual void	Build (const gp_Pnt2d &)
	Builds volume according to the point and given pixel tolerance. More...

virtual void	Build (const gp_Pnt2d &, const gp_Pnt2d &)
	Builds volume according to the selected rectangle. More...

virtual void	Build (const gp_Pnt2d &, const gp_Pnt2d &, const gp_Pnt2d &)
	Builds volume according to the triangle given. More...

virtual Standard_Boolean	Overlaps (const gp_Pnt &thePnt)
	Intersection test between defined volume and given point Does not perform depth calculation, so this method is defined as helper function for inclusion test. Therefore, its implementation makes sense only for rectangular frustum with box selection mode activated. More...

virtual Standard_Real	DistToGeometryCenter (const gp_Pnt &theCOG)
	Measures distance between 3d projection of user-picked screen point and given point theCOG. More...

virtual gp_Pnt	DetectedPoint (const Standard_Real theDepth) const

virtual Standard_Boolean	IsClipped (const Graphic3d_SequenceOfHClipPlane &thePlanes, const Standard_Real theDepth)
	Checks if the point of sensitive in which selection was detected belongs to the region defined by clipping planes. More...

Additional Inherited Members
Protected Attributes inherited from SelectMgr_BaseFrustum
Standard_Integer	myPixelTolerance
	Pixel tolerance. More...

Standard_Boolean	myIsOrthographic
	Defines if current camera is orthographic. More...

Handle< SelectMgr_FrustumBuilder >	myBuilder
	A tool implementing methods for volume build. More...

Detailed Description

This class is used to handle polyline selection. The main principle of polyline selection algorithm is to split the polygon defined by polyline onto triangles. Than each of them is considered as a base for triangular frustum building. In other words, each triangle vertiex will be projected from 2d screen space to 3d world space onto near and far view frustum planes. Thus, the projected triangles make up the bases of selecting frustum. When the set of such frustums is created, the function determining selection iterates through triangular frustum set and searches for overlap with any frustum.

Constructor & Destructor Documentation

SelectMgr_TriangularFrustumSet::SelectMgr_TriangularFrustumSet ( )

inline

SelectMgr_TriangularFrustumSet::~SelectMgr_TriangularFrustumSet ( )

inline

Member Function Documentation

virtual void SelectMgr_TriangularFrustumSet::Build ( const TColgp_Array1OfPnt2d & thePoints )

virtual

Meshes polygon bounded by polyline. Than organizes a set of triangular frustums, where each triangle's projection onto near and far view frustum planes is considered as a frustum base.

Reimplemented from SelectMgr_BaseFrustum.

virtual Standard_Boolean SelectMgr_TriangularFrustumSet::Overlaps	(	const SelectMgr_Vec3 &	theBoxMin,
		const SelectMgr_Vec3 &	theBoxMax,
		Standard_Real &	theDepth
	)

virtual

SAT intersection test between defined volume and given axis-aligned box.

Reimplemented from SelectMgr_BaseFrustum.

virtual Standard_Boolean SelectMgr_TriangularFrustumSet::Overlaps	(	const SelectMgr_Vec3 &	theBoxMin,
		const SelectMgr_Vec3 &	theBoxMax,
		Standard_Boolean *	theInside
	)

virtual

Returns true if selecting volume is overlapped by axis-aligned bounding box with minimum corner at point theMinPt and maximum at point theMaxPt.

Reimplemented from SelectMgr_BaseFrustum.

virtual Standard_Boolean SelectMgr_TriangularFrustumSet::Overlaps	(	const gp_Pnt &	thePnt,
		Standard_Real &	theDepth
	)

virtual

Intersection test between defined volume and given point.

Reimplemented from SelectMgr_BaseFrustum.

virtual Standard_Boolean SelectMgr_TriangularFrustumSet::Overlaps	(	const Handle< TColgp_HArray1OfPnt > &	theArrayOfPnts,
		Select3D_TypeOfSensitivity	theSensType,
		Standard_Real &	theDepth
	)

virtual

SAT intersection test between defined volume and given ordered set of points, representing line segments. The test may be considered of interior part or boundary line defined by segments depending on given sensitivity type.

Reimplemented from SelectMgr_BaseFrustum.

virtual Standard_Boolean SelectMgr_TriangularFrustumSet::Overlaps	(	const gp_Pnt &	thePnt1,
		const gp_Pnt &	thePnt2,
		Standard_Real &	theDepth
	)

virtual

Checks if line segment overlaps selecting frustum.

Reimplemented from SelectMgr_BaseFrustum.

virtual Standard_Boolean SelectMgr_TriangularFrustumSet::Overlaps	(	const gp_Pnt &	thePt1,
		const gp_Pnt &	thePt2,
		const gp_Pnt &	thePt3,
		Select3D_TypeOfSensitivity	theSensType,
		Standard_Real &	theDepth
	)

virtual

SAT intersection test between defined volume and given triangle. The test may be considered of interior part or boundary line defined by triangle vertices depending on given sensitivity type.

Reimplemented from SelectMgr_BaseFrustum.

virtual NCollection_Handle<SelectMgr_BaseFrustum> SelectMgr_TriangularFrustumSet::ScaleAndTransform	(	const Standard_Integer	theScale,
		const gp_Trsf &	theTrsf
	)

virtual

Returns a copy of the frustum with all sub-volumes transformed according to the matrix given.

Reimplemented from SelectMgr_BaseFrustum.

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

SelectMgr_TriangularFrustumSet.hxx

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation