This is an internal class containing 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_Frustum.hxx>
Inheritance diagram for SelectMgr_Frustum< N >:
Public Member Functions | |
| SelectMgr_Frustum () | |
| virtual void | DumpJson (Standard_OStream &theOStream, Standard_Integer theDepth=-1) const override |
| Dumps the content of me into the stream. More... | |
 Public Member Functions inherited from SelectMgr_BaseFrustum | |
| SelectMgr_BaseFrustum () | |
| Creates new selecting volume with pixel tolerance set to 2, orthographic camera and empty frustum builder. More... | |
| virtual | ~SelectMgr_BaseFrustum () |
| Destructor. More... | |
| void | SetBuilder (const Handle< SelectMgr_FrustumBuilder > &theBuilder) |
| Nullifies the builder created in the constructor and copies the pointer given. More... | |
| virtual void | SetCamera (const Handle< Graphic3d_Camera > &theCamera) override |
| Saves camera definition and passes it to builder. More... | |
| virtual void | SetPixelTolerance (const Standard_Integer theTol) override |
| Sets pixel tolerance. It makes sense only for scalable intersectors (built on a single point). This method does nothing for the base class. More... | |
| virtual void | SetWindowSize (const Standard_Integer theWidth, const Standard_Integer theHeight) override |
| Sets current window size. This method does nothing for the base class. More... | |
| virtual void | WindowSize (Standard_Integer &theWidth, Standard_Integer &theHeight) const override |
| Returns current window size. This method doesn't set any output values for the base class. More... | |
| virtual void | SetViewport (const Standard_Real theX, const Standard_Real theY, const Standard_Real theWidth, const Standard_Real theHeight) override |
| Passes viewport parameters to builder. More... | |
| Standard_Boolean | IsBoundaryIntersectSphere (const gp_Pnt &theCenter, const Standard_Real theRadius, const gp_Dir &thePlaneNormal, const TColgp_Array1OfPnt &theBoundaries, Standard_Boolean &theBoundaryInside) const |
| Checks whether the boundary of the current volume selection intersects with a sphere or are there it's boundaries lying inside the sphere. More... | |
| Public Member Functions inherited from SelectMgr_BaseIntersector | |
| SelectMgr_BaseIntersector () | |
| Creates new empty selecting volume. More... | |
| virtual | ~SelectMgr_BaseIntersector () |
| Destructor. More... | |
| virtual void | Build ()=0 |
| Builds intersector according to internal parameters. More... | |
| SelectMgr_SelectionType | GetSelectionType () const |
| Returns selection type of this intersector. More... | |
| virtual Standard_Boolean | IsScalable () const =0 |
| Checks if it is possible to scale this intersector. More... | |
| virtual Handle< SelectMgr_BaseIntersector > | ScaleAndTransform (const Standard_Integer theScaleFactor, const gp_GTrsf &theTrsf, const Handle< SelectMgr_FrustumBuilder > &theBuilder) const =0 |
| Note that this method does not perform any checks on type of the frustum. More... | |
| const Handle< Graphic3d_Camera > & | Camera () const |
| Return camera definition. More... | |
| virtual const gp_Pnt & | GetNearPnt () const |
| Returns near point of intersector. This method returns zero point for the base class. More... | |
| virtual const gp_Pnt & | GetFarPnt () const |
| Returns far point of intersector. This method returns zero point for the base class. More... | |
| virtual const gp_Dir & | GetViewRayDirection () const |
| Returns direction ray of intersector. This method returns zero direction for the base class. More... | |
| virtual const gp_Pnt2d & | GetMousePosition () const |
| Returns current mouse coordinates. This method returns infinite point for the base class. More... | |
| virtual void | GetPlanes (NCollection_Vector< SelectMgr_Vec4 > &thePlaneEquations) const |
| Stores plane equation coefficients (in the following form: Ax + By + Cz + D = 0) to the given vector. This method only clears input vector for the base class. More... | |
| virtual Standard_Boolean | OverlapsBox (const SelectMgr_Vec3 &theBoxMin, const SelectMgr_Vec3 &theBoxMax, const SelectMgr_ViewClipRange &theClipRange, SelectBasics_PickResult &thePickResult) const =0 |
| SAT intersection test between defined volume and given axis-aligned box. More... | |
| virtual Standard_Boolean | OverlapsBox (const SelectMgr_Vec3 &theBoxMin, const SelectMgr_Vec3 &theBoxMax, Standard_Boolean *theInside=NULL) const =0 |
| 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 | OverlapsPoint (const gp_Pnt &thePnt, const SelectMgr_ViewClipRange &theClipRange, SelectBasics_PickResult &thePickResult) const =0 |
| Intersection test between defined volume and given point. More... | |
| virtual Standard_Boolean | OverlapsPoint (const gp_Pnt &thePnt) const =0 |
| 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_Boolean | OverlapsPolygon (const TColgp_Array1OfPnt &theArrayOfPnts, Select3D_TypeOfSensitivity theSensType, const SelectMgr_ViewClipRange &theClipRange, SelectBasics_PickResult &thePickResult) const =0 |
| 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 | OverlapsSegment (const gp_Pnt &thePnt1, const gp_Pnt &thePnt2, const SelectMgr_ViewClipRange &theClipRange, SelectBasics_PickResult &thePickResult) const =0 |
| Checks if line segment overlaps selecting frustum. More... | |
| virtual Standard_Boolean | OverlapsTriangle (const gp_Pnt &thePnt1, const gp_Pnt &thePnt2, const gp_Pnt &thePnt3, Select3D_TypeOfSensitivity theSensType, const SelectMgr_ViewClipRange &theClipRange, SelectBasics_PickResult &thePickResult) const =0 |
| 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_Boolean | OverlapsSphere (const gp_Pnt &theCenter, const Standard_Real theRadius, Standard_Boolean *theInside=NULL) const =0 |
| Returns true if selecting volume is overlapped by sphere with center theCenter and radius theRadius. More... | |
| virtual Standard_Boolean | OverlapsSphere (const gp_Pnt &theCenter, const Standard_Real theRadius, const SelectMgr_ViewClipRange &theClipRange, SelectBasics_PickResult &thePickResult) const =0 |
| Returns true if selecting volume is overlapped by sphere with center theCenter and radius theRadius. More... | |
| virtual Standard_Boolean | OverlapsCylinder (const Standard_Real theBottomRad, const Standard_Real theTopRad, const Standard_Real theHeight, const gp_Trsf &theTrsf, const SelectMgr_ViewClipRange &theClipRange, SelectBasics_PickResult &thePickResult) const =0 |
| Returns true if selecting volume is overlapped by cylinder (or cone) with radiuses theBottomRad and theTopRad, height theHeight and transformation to apply theTrsf. More... | |
| virtual Standard_Boolean | OverlapsCylinder (const Standard_Real theBottomRad, const Standard_Real theTopRad, const Standard_Real theHeight, const gp_Trsf &theTrsf, Standard_Boolean *theInside=NULL) const =0 |
| Returns true if selecting volume is overlapped by cylinder (or cone) with radiuses theBottomRad and theTopRad, height theHeight and transformation to apply theTrsf. More... | |
| virtual Standard_Real | DistToGeometryCenter (const gp_Pnt &theCOG) const |
| Measures distance between 3d projection of user-picked screen point and given point theCOG. It makes sense only for intersectors built on a single point. This method returns infinite value for the base class. More... | |
| virtual gp_Pnt | DetectedPoint (const Standard_Real theDepth) const |
| Calculates the point on a view ray that was detected during the run of selection algo by given depth. It makes sense only for intersectors built on a single point. This method returns infinite point for the base class. More... | |
| virtual Standard_Boolean | RaySphereIntersection (const gp_Pnt &theCenter, const Standard_Real theRadius, const gp_Pnt &theLoc, const gp_Dir &theRayDir, Standard_Real &theTimeEnter, Standard_Real &theTimeLeave) const |
| Checks whether the ray that starts at the point theLoc and directs with the direction theRayDir intersects with the sphere with center at theCenter and radius TheRadius. More... | |
| virtual Standard_Boolean | RayCylinderIntersection (const Standard_Real theBottomRadius, const Standard_Real theTopRadius, const Standard_Real theHeight, const gp_Pnt &theLoc, const gp_Dir &theRayDir, Standard_Real &theTimeEnter, Standard_Real &theTimeLeave) const |
| Checks whether the ray that starts at the point theLoc and directs with the direction theRayDir intersects with the cylinder (or cone) with radiuses theBottomRad and theTopRad and height theHeights. 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 | |
| Standard_Boolean | hasBoxOverlap (const SelectMgr_Vec3 &theBoxMin, const SelectMgr_Vec3 &theBoxMax, Standard_Boolean *theInside=NULL) const |
| 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 | hasPointOverlap (const gp_Pnt &thePnt) const |
| SAT intersection test between defined volume and given point. More... | |
| Standard_Boolean | hasSegmentOverlap (const gp_Pnt &thePnt1, const gp_Pnt &thePnt2) const |
| SAT intersection test between defined volume and given segment. More... | |
| Standard_Boolean | hasPolygonOverlap (const TColgp_Array1OfPnt &theArrayOfPnts, gp_Vec &theNormal) const |
| SAT intersection test between frustum given and planar convex polygon represented as ordered point set. More... | |
| Standard_Boolean | hasTriangleOverlap (const gp_Pnt &thePnt1, const gp_Pnt &thePnt2, const gp_Pnt &thePnt3, gp_Vec &theNormal) const |
| SAT intersection test between defined volume and given triangle. More... | |
| Standard_Boolean | hasSphereOverlap (const gp_Pnt &thePnt1, const Standard_Real theRadius, Standard_Boolean *theInside=NULL) const |
| Intersection test between defined volume and given sphere. More... | |
| Standard_Boolean | hasCylinderOverlap (const Standard_Real theBottomRad, const Standard_Real theTopRad, const Standard_Real theHeight, const gp_Trsf &theTrsf, Standard_Boolean *theInside=NULL) const |
| Intersection test between defined volume and given cylinder (or cone). More... | |
| Standard_Boolean | IsDotInside (const gp_Pnt &thePnt, const TColgp_Array1OfPnt &theVertices) const |
| Checking whether the point thePnt is inside the shape with borders theVertices. thePnt and theVertices lie in the same plane. More... | |
Protected Attributes | |
| 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... | |
| Handle< SelectMgr_FrustumBuilder > | myBuilder |
| A tool implementing methods for volume build. More... | |
| Protected Attributes inherited from SelectMgr_BaseIntersector | |
| Handle< Graphic3d_Camera > | myCamera |
| camera definition (if builder isn't NULL it is the same as its camera) More... | |
| SelectMgr_SelectionType | mySelectionType |
| type of selection 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... | |
Detailed Description
template<int N>
class SelectMgr_Frustum< N >
This is an internal class containing 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). Vertex order:
- for triangular frustum: V0_Near, V1_Near, V2_Near, V0_Far, V1_Far, V2_Far;
- for rectangular frustum: LeftTopNear, LeftTopFar, LeftBottomNear,LeftBottomFar, RightTopNear, RightTopFar, RightBottomNear, RightBottomFar. Plane order in array:
- for triangular frustum: V0V1, V1V2, V0V2, Near, Far;
- for rectangular frustum: Top, Bottom, Left, Right, Near, Far. Uncollinear edge directions order:
- for rectangular frustum: Horizontal, Vertical, LeftLower, RightLower, LeftUpper, RightUpper;
- for triangular frustum: V0_Near - V0_Far, V1_Near - V1_Far, V2_Near - V2_Far, V1_Near - V0_Near, V2_Near - V1_Near, V2_Near - V0_Near.
Constructor & Destructor Documentation
◆ SelectMgr_Frustum()
template<int N>
|
inline |
Member Function Documentation
◆ DumpJson()
template<int N>
|
overridevirtual |
Dumps the content of me into the stream.
Reimplemented from SelectMgr_BaseFrustum.
Reimplemented in SelectMgr_TriangularFrustum, and SelectMgr_RectangularFrustum.
◆ hasBoxOverlap()
template<int N>
|
protected |
Returns true if selecting volume is overlapped by axis-aligned bounding box with minimum corner at point theMinPt and maximum at point theMaxPt.
◆ hasCylinderOverlap()
template<int N>
|
protected |
Intersection test between defined volume and given cylinder (or cone).
◆ hasPointOverlap()
template<int N>
|
protected |
SAT intersection test between defined volume and given point.
◆ hasPolygonOverlap()
template<int N>
|
protected |
SAT intersection test between frustum given and planar convex polygon represented as ordered point set.
◆ hasSegmentOverlap()
template<int N>
|
protected |
SAT intersection test between defined volume and given segment.
◆ hasSphereOverlap()
template<int N>
|
protected |
Intersection test between defined volume and given sphere.
◆ hasTriangleOverlap()
template<int N>
|
protected |
SAT intersection test between defined volume and given triangle.
◆ IsDotInside()
template<int N>
|
protected |
Checking whether the point thePnt is inside the shape with borders theVertices. thePnt and theVertices lie in the same plane.
Field Documentation
◆ myEdgeDirs
template<int N>
|
protected |
Cached edge directions.
◆ myMaxOrthoVertsProjections
template<int N>
|
protected |
Cached projections of vertices onto directions of ortho unit vectors.
◆ myMaxVertsProjections
template<int N>
|
protected |
Cached projections of vertices onto frustum plane directions.
◆ myMinOrthoVertsProjections
template<int N>
|
protected |
Cached projections of vertices onto directions of ortho unit vectors.
◆ myMinVertsProjections
template<int N>
|
protected |
Cached projections of vertices onto frustum plane directions.
◆ myPlanes
template<int N>
|
protected |
Plane equations.
◆ myVertices
template<int N>
|
protected |
Vertices coordinates.
The documentation for this class was generated from the following file:
