This class contains representation of rectangular selecting frustum, created in case of point and box selection, and algorithms for overlap detection between selecting frustum and sensitive entities. The principle of frustum calculation: More...

#include <SelectMgr_RectangularFrustum.hxx>

Inheritance diagram for SelectMgr_RectangularFrustum:

[legend]

Public Member Functions
	SelectMgr_RectangularFrustum ()

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

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

virtual NCollection_Handle< SelectMgr_BaseFrustum >	ScaleAndTransform (const Standard_Integer theScaleFactor, const gp_Trsf &theTrsf) Standard_OVERRIDE
	IMPORTANT: Scaling makes sense only for frustum built on a single point! Note that this method does not perform any checks on type of the frustum. Returns a copy of the frustum resized according to the scale factor given and transforms it using the matrix given. There are no default parameters, but in case if: More...

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

virtual Standard_Boolean	Overlaps (const SelectMgr_Vec3 &theBoxMin, const SelectMgr_Vec3 &theBoxMax, Standard_Boolean *theInside=NULL) 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 gp_Pnt &thePnt) 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...

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

virtual gp_Pnt	DetectedPoint (const Standard_Real theDepth) const Standard_OVERRIDE
	Calculates the point on a view ray that was detected during the run of selection algo by given depth. More...

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

const gp_Pnt *	GetVertices () const
	A set of helper functions that return rectangular selecting frustum data. More...

gp_Pnt	GetNearPnt () const

gp_Pnt	GetFarPnt () const

Public Member Functions inherited from SelectMgr_Frustum< 4 >
	SelectMgr_Frustum ()

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 &, const gp_Pnt2d &, const gp_Pnt2d &)
	Builds volume according to the triangle given. More...

virtual void	Build (const TColgp_Array1OfPnt2d &)
	Builds selecting volumes set according to polyline points. More...

Protected Member Functions
void	segmentSegmentDistance (const gp_Pnt &theSegPnt1, const gp_Pnt &theSegPnt2, Standard_Real &theDepth)

void	segmentPlaneIntersection (const gp_Vec &thePlane, const gp_Pnt &thePntOnPlane, Standard_Real &theDepth)

Protected Member Functions inherited from SelectMgr_Frustum< 4 >
Standard_Boolean	hasOverlap (const SelectMgr_Vec3 &theBoxMin, const SelectMgr_Vec3 &theBoxMax, Standard_Boolean *theInside=NULL)
	Returns true if selecting volume is overlapped by axis-aligned bounding box with minimum corner at point theMinPt and maximum at point theMaxPt. More...

Standard_Boolean	hasOverlap (const gp_Pnt &thePnt)
	SAT intersection test between defined volume and given point. More...

Standard_Boolean	hasOverlap (const gp_Pnt &thePnt1, const gp_Pnt &thePnt2)
	SAT intersection test between defined volume and given segment. More...

Standard_Boolean	hasOverlap (const Handle< TColgp_HArray1OfPnt > &theArrayOfPnts, gp_Vec &theNormal)
	SAT intersection test between frustum given and planar convex polygon represented as ordered point set. More...

Standard_Boolean	hasOverlap (const gp_Pnt &thePnt1, const gp_Pnt &thePnt2, const gp_Pnt &thePnt3, gp_Vec &theNormal)
	SAT intersection test between defined volume and given triangle. More...

Additional Inherited Members
Protected Attributes inherited from SelectMgr_Frustum< 4 >
gp_Vec	myPlanes [N+2]
	Plane equations. More...

gp_Pnt	myVertices [N *2]
	Vertices coordinates. More...

Standard_Real	myMaxVertsProjections [N+2]
	Cached projections of vertices onto frustum plane directions. More...

Standard_Real	myMinVertsProjections [N+2]
	Cached projections of vertices onto frustum plane directions. More...

Standard_Real	myMaxOrthoVertsProjections [3]
	Cached projections of vertices onto directions of ortho unit vectors. More...

Standard_Real	myMinOrthoVertsProjections [3]
	Cached projections of vertices onto directions of ortho unit vectors. More...

gp_Vec	myEdgeDirs [6]
	Cached edge directions. More...

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 contains representation of rectangular selecting frustum, created in case of point and box selection, and algorithms for overlap detection between selecting frustum and sensitive entities. The principle of frustum calculation:

for point selection: on a near view frustum plane rectangular neighborhood of user-picked point is created according to the pixel tolerance given and then this rectangle is projected onto far view frustum plane. This rectangles define the parallel bases of selecting frustum;
for box selection: box points are projected onto near and far view frustum planes. These 2 projected rectangles define parallel bases of selecting frustum. Overlap detection tests are implemented according to the terms of separating axis theorem (SAT).

Constructor & Destructor Documentation

SelectMgr_RectangularFrustum::SelectMgr_RectangularFrustum ( )

inline

Member Function Documentation

virtual void SelectMgr_RectangularFrustum::Build ( const gp_Pnt2d & thePoint )

virtual

Builds volume according to the point and given pixel tolerance.

Reimplemented from SelectMgr_BaseFrustum.

virtual void SelectMgr_RectangularFrustum::Build	(	const gp_Pnt2d &	theMinPnt,
		const gp_Pnt2d &	theMaxPnt
	)

virtual

Builds volume according to the selected rectangle.

Reimplemented from SelectMgr_BaseFrustum.

virtual gp_Pnt SelectMgr_RectangularFrustum::DetectedPoint ( const Standard_Real theDepth ) const

virtual

Calculates the point on a view ray that was detected during the run of selection algo by given depth.

Reimplemented from SelectMgr_BaseFrustum.

virtual Standard_Real SelectMgr_RectangularFrustum::DistToGeometryCenter ( const gp_Pnt & theCOG )

virtual

Measures distance between 3d projection of user-picked screen point and given point theCOG.

Reimplemented from SelectMgr_BaseFrustum.

gp_Pnt SelectMgr_RectangularFrustum::GetFarPnt ( ) const

inline

gp_Pnt SelectMgr_RectangularFrustum::GetNearPnt ( ) const

inline

const gp_Pnt* SelectMgr_RectangularFrustum::GetVertices ( ) const

inline

A set of helper functions that return rectangular selecting frustum data.

virtual Standard_Boolean SelectMgr_RectangularFrustum::IsClipped	(	const Graphic3d_SequenceOfHClipPlane &	thePlanes,
		const Standard_Real	theDepth
	)

virtual

Checks if the point of sensitive in which selection was detected belongs to the region defined by clipping planes.

Reimplemented from SelectMgr_BaseFrustum.

virtual Standard_Boolean SelectMgr_RectangularFrustum::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_RectangularFrustum::Overlaps	(	const SelectMgr_Vec3 &	theBoxMin,
		const SelectMgr_Vec3 &	theBoxMax,
		Standard_Boolean *	theInside = `NULL`
	)

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_RectangularFrustum::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_RectangularFrustum::Overlaps ( const gp_Pnt & thePnt )

virtual

Intersection test between defined volume and given point.

Reimplemented from SelectMgr_BaseFrustum.

virtual Standard_Boolean SelectMgr_RectangularFrustum::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_RectangularFrustum::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_RectangularFrustum::Overlaps	(	const gp_Pnt &	thePnt1,
		const gp_Pnt &	thePnt2,
		const gp_Pnt &	thePnt3,
		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_RectangularFrustum::ScaleAndTransform	(	const Standard_Integer	theScaleFactor,
		const gp_Trsf &	theTrsf
	)

virtual

IMPORTANT: Scaling makes sense only for frustum built on a single point! Note that this method does not perform any checks on type of the frustum. Returns a copy of the frustum resized according to the scale factor given and transforms it using the matrix given. There are no default parameters, but in case if:

transformation only is needed: must be initialized as any negative value;
scale only is needed: must be set to gp_Identity.

Reimplemented from SelectMgr_BaseFrustum.

void SelectMgr_RectangularFrustum::segmentPlaneIntersection	(	const gp_Vec &	thePlane,
		const gp_Pnt &	thePntOnPlane,
		Standard_Real &	theDepth
	)

protected

void SelectMgr_RectangularFrustum::segmentSegmentDistance	(	const gp_Pnt &	theSegPnt1,
		const gp_Pnt &	theSegPnt2,
		Standard_Real &	theDepth
	)

protected

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

SelectMgr_RectangularFrustum.hxx

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation