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) override
	Builds volume according to the point and given pixel tolerance. More...

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

virtual NCollection_Handle< SelectMgr_BaseFrustum >	ScaleAndTransform (const Standard_Integer theScaleFactor, const gp_Trsf &theTrsf) 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) 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) 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) override
	Intersection test between defined volume and given point. More...

virtual Standard_Boolean	Overlaps (const gp_Pnt &thePnt) override
	Intersection test between defined volume and given point. More...

virtual Standard_Boolean	Overlaps (const TColgp_Array1OfPnt &theArrayOfPnts, Select3D_TypeOfSensitivity theSensType, Standard_Real &theDepth) 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) 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) 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) 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 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) override
	Checks if the point of sensitive in which selection was detected belongs to the region defined by clipping planes. More...

virtual void	SetViewClipping (const Graphic3d_SequenceOfHClipPlane &thePlanes) override
	Valid for point selection only! Computes depth range for global (defined for the whole view) 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 &theWorldView, const Standard_Integer theIsOrthographic, const Graphic3d_WorldViewProjState &theWVPState=Graphic3d_WorldViewProjState())
	Passes camera projection and orientation matrices to builder. More...

const Graphic3d_Mat4d &	ProjectionMatrix () const

const Graphic3d_Mat4d &	WorldViewMatrix () const

const Graphic3d_WorldViewProjState &	WorldViewProjState () const

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...

Public Member Functions inherited from Standard_Transient
	Standard_Transient ()
	Empty constructor. More...

	Standard_Transient (const Standard_Transient &)
	Copy constructor – does nothing. More...

Standard_Transient &	operator= (const Standard_Transient &)
	Assignment operator, needed to avoid copying reference counter. More...

virtual	~Standard_Transient ()
	Destructor must be virtual. More...

virtual void	Delete () const
	Memory deallocator for transient classes. More...

virtual const opencascade::handle< Standard_Type > &	DynamicType () const
	Returns a type descriptor about this object. More...

Standard_Boolean	IsInstance (const opencascade::handle< Standard_Type > &theType) const
	Returns a true value if this is an instance of Type. More...

Standard_Boolean	IsInstance (const Standard_CString theTypeName) const
	Returns a true value if this is an instance of TypeName. More...

Standard_Boolean	IsKind (const opencascade::handle< Standard_Type > &theType) const
	Returns true if this is an instance of Type or an instance of any class that inherits from Type. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More...

Standard_Boolean	IsKind (const Standard_CString theTypeName) const
	Returns true if this is an instance of TypeName or an instance of any class that inherits from TypeName. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More...

Standard_Transient *	This () const
	Returns non-const pointer to this object (like const_cast). For protection against creating handle to objects allocated in stack or call from constructor, it will raise exception Standard_ProgramError if reference counter is zero. More...

Standard_Integer	GetRefCount () const
	Get the reference counter of this object. More...

void	IncrementRefCounter () const
	Increments the reference counter of this object. More...

Standard_Integer	DecrementRefCounter () const
	Decrements the reference counter of this object; returns the decremented value. 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)

void	computeClippingRange (const Graphic3d_SequenceOfHClipPlane &thePlanes, Standard_Real &theDepthMin, Standard_Real &theDepthMax)
	Computes valid depth range for the given clipping planes. More...

Standard_Boolean	isViewClippingOk (const Standard_Real theDepth) const
	Returns false if theDepth must be clipped by current view clip range. More...

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 TColgp_Array1OfPnt &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
Public Types inherited from Standard_Transient
typedef void	base_type
	Returns a type descriptor about this object. More...

Static Public Member Functions inherited from Standard_Transient
static const char *	get_type_name ()
	Returns a type descriptor about this object. More...

static const opencascade::handle< Standard_Type > &	get_type_descriptor ()
	Returns type descriptor of Standard_Transient class. More...

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 )

overridevirtual

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
	)

overridevirtual

Builds volume according to the selected rectangle.

Reimplemented from SelectMgr_BaseFrustum.

void SelectMgr_RectangularFrustum::computeClippingRange	(	const Graphic3d_SequenceOfHClipPlane &	thePlanes,
		Standard_Real &	theDepthMin,
		Standard_Real &	theDepthMax
	)

protected

Computes valid depth range for the given clipping planes.

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

overridevirtual

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 )

overridevirtual

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
	)

overridevirtual

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

Reimplemented from SelectMgr_BaseFrustum.

Standard_Boolean SelectMgr_RectangularFrustum::isViewClippingOk ( const Standard_Real theDepth ) const

protected

Returns false if theDepth must be clipped by current view clip range.

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

overridevirtual

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`
	)

overridevirtual

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
	)

overridevirtual

Intersection test between defined volume and given point.

Reimplemented from SelectMgr_BaseFrustum.

virtual Standard_Boolean SelectMgr_RectangularFrustum::Overlaps ( const gp_Pnt & thePnt )

overridevirtual

Intersection test between defined volume and given point.

Reimplemented from SelectMgr_BaseFrustum.

virtual Standard_Boolean SelectMgr_RectangularFrustum::Overlaps	(	const TColgp_Array1OfPnt &	theArrayOfPnts,
		Select3D_TypeOfSensitivity	theSensType,
		Standard_Real &	theDepth
	)

overridevirtual

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
	)

overridevirtual

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
	)

overridevirtual

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
	)

overridevirtual

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

virtual void SelectMgr_RectangularFrustum::SetViewClipping ( const Graphic3d_SequenceOfHClipPlane & thePlanes )

overridevirtual

Valid for point selection only! Computes depth range for global (defined for the whole view) clipping planes.

Reimplemented from SelectMgr_BaseFrustum.

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

SelectMgr_RectangularFrustum.hxx

SelectMgr_RectangularFrustum Class Reference

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation