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 () | |
 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_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 | 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 void | Build (const TColgp_Array1OfPnt2d &) |
| Builds selecting volumes set according to polyline points. More... | |
| virtual Handle< SelectMgr_BaseFrustum > | ScaleAndTransform (const Standard_Integer, const gp_GTrsf &) const |
| 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) |
| 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) |
| 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) |
| Intersection test between defined volume and given point. 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_Boolean | Overlaps (const TColgp_Array1OfPnt &theArrayOfPnts, Select3D_TypeOfSensitivity theSensType, Standard_Real &theDepth) |
| 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) |
| Checks if line segment overlaps selecting frustum. More... | |
| virtual Standard_Boolean | Overlaps (const gp_Pnt &thePt1, const gp_Pnt &thePt2, const gp_Pnt &thePt3, Select3D_TypeOfSensitivity theSensType, Standard_Real &theDepth) |
| 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) |
| 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... | |
| 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. 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 | 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... | |
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... | |
| Standard_Boolean | myIsOrthographic |
| Defines if current camera is orthographic. More... | |
| Handle< SelectMgr_FrustumBuilder > | myBuilder |
| A tool implementing methods for volume build. More... | |
| Handle< Graphic3d_Camera > | myCamera |
| camera definition 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>
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inline |
Member Function Documentation
◆ hasOverlap() [1/5]
template<int N>
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protected |
Returns true if selecting volume is overlapped by axis-aligned bounding box with minimum corner at point theMinPt and maximum at point theMaxPt.
◆ hasOverlap() [2/5]
template<int N>
|
protected |
SAT intersection test between defined volume and given point.
◆ hasOverlap() [3/5]
template<int N>
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protected |
SAT intersection test between defined volume and given segment.
◆ hasOverlap() [4/5]
template<int N>
|
protected |
SAT intersection test between frustum given and planar convex polygon represented as ordered point set.
◆ hasOverlap() [5/5]
template<int N>
|
protected |
SAT intersection test between defined volume and given triangle.
Field Documentation
◆ myEdgeDirs
template<int N>
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protected |
Cached edge directions.
◆ myMaxOrthoVertsProjections
template<int N>
|
protected |
Cached projections of vertices onto directions of ortho unit vectors.
◆ myMaxVertsProjections
template<int N>
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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>
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protected |
Cached projections of vertices onto frustum plane directions.
◆ myPlanes
template<int N>
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protected |
Plane equations.
◆ myVertices
template<int N>
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protected |
Vertices coordinates.
The documentation for this class was generated from the following file:
