1 // Created on: 2014-05-22
2 // Created by: Varvara POSKONINA
3 // Copyright (c) 2005-2014 OPEN CASCADE SAS
5 // This file is part of Open CASCADE Technology software library.
7 // This library is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU Lesser General Public License version 2.1 as published
9 // by the Free Software Foundation, with special exception defined in the file
10 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
11 // distribution for complete text of the license and disclaimer of any warranty.
13 // Alternatively, this file may be used under the terms of Open CASCADE
14 // commercial license or contractual agreement.
16 #ifndef _SelectMgr_BaseFrustum_HeaderFile
17 #define _SelectMgr_BaseFrustum_HeaderFile
22 #include <Graphic3d_Camera.hxx>
23 #include <Graphic3d_ClipPlane.hxx>
24 #include <Graphic3d_SequenceOfHClipPlane.hxx>
25 #include <Graphic3d_WorldViewProjState.hxx>
27 #include <TColgp_HArray1OfPnt.hxx>
28 #include <TColgp_Array1OfPnt2d.hxx>
30 #include <Select3D_BndBox3d.hxx>
31 #include <SelectMgr_FrustumBuilder.hxx>
32 #include <Select3D_TypeOfSensitivity.hxx>
33 #include <SelectMgr_VectorTypes.hxx>
35 //! This class is an interface for different types of selecting frustums,
36 //! defining different selection types, like point, box or polyline
37 //! selection. It contains signatures of functions for detection of
38 //! overlap by sensitive entity and initializes some data for building
39 //! the selecting frustum
40 class SelectMgr_BaseFrustum : public Standard_Transient
44 //! Creates new selecting volume with pixel toletance set to 2,
45 //! orthographic camera and empty frustum builder
46 Standard_EXPORT SelectMgr_BaseFrustum();
48 virtual ~SelectMgr_BaseFrustum() {}
50 //! Passes camera projection and orientation matrices to builder
51 Standard_EXPORT void SetCamera (const Handle(Graphic3d_Camera)& theCamera);
53 //! Passes camera projection and orientation matrices to builder
54 Standard_EXPORT void SetCamera (const Graphic3d_Mat4d& theProjection,
55 const Graphic3d_Mat4d& theWorldView,
56 const Standard_Integer theIsOrthographic,
57 const Graphic3d_WorldViewProjState& theWVPState = Graphic3d_WorldViewProjState());
59 //! @return current camera projection transformation common for all selecting volumes
60 Standard_EXPORT const Graphic3d_Mat4d& ProjectionMatrix() const;
62 //! @return current camera world view transformation common for all selecting volumes
63 Standard_EXPORT const Graphic3d_Mat4d& WorldViewMatrix() const;
65 //! @return current camera world view projection transformation state
66 Standard_EXPORT const Graphic3d_WorldViewProjState& WorldViewProjState() const;
68 Standard_EXPORT void SetPixelTolerance (const Standard_Integer theTol);
70 Standard_EXPORT void SetWindowSize (const Standard_Integer theWidth,
71 const Standard_Integer theHeight);
73 //! Passes viewport parameters to builder
74 Standard_EXPORT void SetViewport (const Standard_Real theX,
75 const Standard_Real theY,
76 const Standard_Real theWidth,
77 const Standard_Real theHeight);
79 //! Nullifies the builder created in the constructor and copies the pointer given
80 Standard_EXPORT void SetBuilder (const Handle(SelectMgr_FrustumBuilder)& theBuilder);
83 //! Builds volume according to the point and given pixel tolerance
84 virtual void Build (const gp_Pnt2d& /*thePoint*/) {}
86 //! Builds volume according to the selected rectangle
87 virtual void Build (const gp_Pnt2d& /*theMinPt*/,
88 const gp_Pnt2d& /*theMaxPt*/) {}
90 //! Builds volume according to the triangle given
91 virtual void Build (const gp_Pnt2d& /*theP1*/,
92 const gp_Pnt2d& /*theP2*/,
93 const gp_Pnt2d& /*theP3*/) {}
95 //! Builds selecting volumes set according to polyline points
96 virtual void Build (const TColgp_Array1OfPnt2d& /*thePoints*/) {}
98 //! IMPORTANT: Scaling makes sense only for frustum built on a single point!
99 //! Note that this method does not perform any checks on type of the frustum.
100 //! Returns a copy of the frustum resized according to the scale factor given
101 //! and transforms it using the matrix given.
102 //! There are no default parameters, but in case if:
103 //! - transformation only is needed: @theScaleFactor must be initialized as any negative value;
104 //! - scale only is needed: @theTrsf must be set to gp_Identity.
105 Standard_EXPORT virtual NCollection_Handle<SelectMgr_BaseFrustum> ScaleAndTransform (const Standard_Integer /*theScaleFactor*/,
106 const gp_Trsf& /*theTrsf*/) { return NULL; }
108 //! SAT intersection test between defined volume and given axis-aligned box
109 Standard_EXPORT virtual Standard_Boolean Overlaps (const SelectMgr_Vec3& theBoxMin,
110 const SelectMgr_Vec3& theBoxMax,
111 Standard_Real& theDepth);
113 //! Returns true if selecting volume is overlapped by axis-aligned bounding box
114 //! with minimum corner at point theMinPt and maximum at point theMaxPt
115 Standard_EXPORT virtual Standard_Boolean Overlaps (const SelectMgr_Vec3& theBoxMin,
116 const SelectMgr_Vec3& theBoxMax,
117 Standard_Boolean* theInside = NULL);
119 //! Intersection test between defined volume and given point
120 Standard_EXPORT virtual Standard_Boolean Overlaps (const gp_Pnt& thePnt,
121 Standard_Real& theDepth);
123 //! Intersection test between defined volume and given point
124 //! Does not perform depth calculation, so this method is defined as
125 //! helper function for inclusion test. Therefore, its implementation
126 //! makes sense only for rectangular frustum with box selection mode activated.
127 Standard_EXPORT virtual Standard_Boolean Overlaps (const gp_Pnt& thePnt);
129 //! SAT intersection test between defined volume and given ordered set of points,
130 //! representing line segments. The test may be considered of interior part or
131 //! boundary line defined by segments depending on given sensitivity type
132 Standard_EXPORT virtual Standard_Boolean Overlaps (const Handle(TColgp_HArray1OfPnt)& theArrayOfPnts,
133 Select3D_TypeOfSensitivity theSensType,
134 Standard_Real& theDepth);
136 //! Checks if line segment overlaps selecting frustum
137 Standard_EXPORT virtual Standard_Boolean Overlaps (const gp_Pnt& thePnt1,
138 const gp_Pnt& thePnt2,
139 Standard_Real& theDepth);
141 //! SAT intersection test between defined volume and given triangle. The test may
142 //! be considered of interior part or boundary line defined by triangle vertices
143 //! depending on given sensitivity type
144 Standard_EXPORT virtual Standard_Boolean Overlaps (const gp_Pnt& thePt1,
145 const gp_Pnt& thePt2,
146 const gp_Pnt& thePt3,
147 Select3D_TypeOfSensitivity theSensType,
148 Standard_Real& theDepth);
150 //! Measures distance between 3d projection of user-picked
151 //! screen point and given point theCOG
152 Standard_EXPORT virtual Standard_Real DistToGeometryCenter (const gp_Pnt& theCOG);
154 Standard_EXPORT virtual gp_Pnt DetectedPoint (const Standard_Real theDepth) const;
156 //! Checks if the point of sensitive in which selection was detected belongs
157 //! to the region defined by clipping planes
158 Standard_EXPORT virtual Standard_Boolean IsClipped (const Graphic3d_SequenceOfHClipPlane& thePlanes,
159 const Standard_Real theDepth);
161 //! Valid for point selection only!
162 //! Computes depth range for global (defined for the whole view) clipping planes.
163 Standard_EXPORT virtual void SetViewClipping (const Graphic3d_SequenceOfHClipPlane& /*thePlanes*/) {};
165 DEFINE_STANDARD_RTTIEXT(SelectMgr_BaseFrustum,Standard_Transient)
168 Standard_Integer myPixelTolerance; //!< Pixel tolerance
169 Standard_Boolean myIsOrthographic; //!< Defines if current camera is orthographic
171 Handle(SelectMgr_FrustumBuilder) myBuilder; //!< A tool implementing methods for volume build
174 #endif // _SelectMgr_BaseFrustum_HeaderFile