Open CASCADE Technology  7.3.0
Public Member Functions
SelectMgr_TriangularFrustumSet Class Reference

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:
Inheritance graph
[legend]

Public Member Functions

 SelectMgr_TriangularFrustumSet ()
 
 ~SelectMgr_TriangularFrustumSet ()
 
virtual void Build (const TColgp_Array1OfPnt2d &thePoints) 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 Handle< SelectMgr_BaseFrustumScaleAndTransform (const Standard_Integer theScale, const gp_GTrsf &theTrsf) const 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) 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) 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 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 void GetPlanes (NCollection_Vector< SelectMgr_Vec4 > &thePlaneEquations) const override
 Stores plane equation coefficients (in the following form: Ax + By + Cz + D = 0) to the given vector. 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 ()
 
const Handle< Graphic3d_Camera > & Camera () const
 Return camera definition. More...
 
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_Boolean theIsOrthographic, const Graphic3d_WorldViewProjState &theWVPState=Graphic3d_WorldViewProjState())
 Passes camera projection and orientation matrices to builder. More...
 
const Graphic3d_Mat4dProjectionMatrix () const
 
const Graphic3d_Mat4dWorldViewMatrix () const
 
const Graphic3d_WorldViewProjStateWorldViewProjState () const
 
void SetPixelTolerance (const Standard_Integer theTol)
 
void SetWindowSize (const Standard_Integer theWidth, const Standard_Integer theHeight)
 
void WindowSize (Standard_Integer &theWidth, Standard_Integer &theHeight) const
 
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...
 
virtual void SetViewClipping (const Handle< Graphic3d_SequenceOfHClipPlane > &)
 Valid for point selection only! Computes depth range for global (defined for the whole view) clipping planes. More...
 
virtual Standard_Boolean SetViewClippingEnabled (const Standard_Boolean)
 Set if view clipping plane is enabled or not. More...
 
- Public Member Functions inherited from Standard_Transient
 Standard_Transient ()
 Empty constructor. More...
 
 Standard_Transient (const Standard_Transient &)
 Copy constructor – does nothing. More...
 
Standard_Transientoperator= (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_TransientThis () 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...
 

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_BaseFrustum
Standard_Integer myPixelTolerance
 Pixel tolerance. More...
 
Standard_Boolean myIsOrthographic
 Defines if current camera is orthographic. More...
 
Handle< SelectMgr_FrustumBuildermyBuilder
 A tool implementing methods for volume build. More...
 
Handle< Graphic3d_CameramyCamera
 camera definition 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::SelectMgr_TriangularFrustumSet ( )
inline

◆ ~SelectMgr_TriangularFrustumSet()

SelectMgr_TriangularFrustumSet::~SelectMgr_TriangularFrustumSet ( )
inline

Member Function Documentation

◆ Build()

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

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.

◆ GetPlanes()

virtual void SelectMgr_TriangularFrustumSet::GetPlanes ( NCollection_Vector< SelectMgr_Vec4 > &  thePlaneEquations) const
overridevirtual

Stores plane equation coefficients (in the following form: Ax + By + Cz + D = 0) to the given vector.

Reimplemented from SelectMgr_BaseFrustum.

◆ Overlaps() [1/6]

virtual Standard_Boolean SelectMgr_TriangularFrustumSet::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.

◆ Overlaps() [2/6]

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

◆ Overlaps() [3/6]

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

Intersection test between defined volume and given point.

Reimplemented from SelectMgr_BaseFrustum.

◆ Overlaps() [4/6]

virtual Standard_Boolean SelectMgr_TriangularFrustumSet::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.

◆ Overlaps() [5/6]

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

Checks if line segment overlaps selecting frustum.

Reimplemented from SelectMgr_BaseFrustum.

◆ Overlaps() [6/6]

virtual Standard_Boolean SelectMgr_TriangularFrustumSet::Overlaps ( const gp_Pnt thePt1,
const gp_Pnt thePt2,
const gp_Pnt thePt3,
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.

◆ ScaleAndTransform()

virtual Handle< SelectMgr_BaseFrustum > SelectMgr_TriangularFrustumSet::ScaleAndTransform ( const Standard_Integer  theScale,
const gp_GTrsf theTrsf 
) const
overridevirtual

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: