1 // Created on: 1998-03-26
2 // Created by: Robert COUBLANC
3 // Copyright (c) 1998-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
6 // This file is part of Open CASCADE Technology software library.
8 // This library is free software; you can redistribute it and/or modify it under
9 // the terms of the GNU Lesser General Public License version 2.1 as published
10 // by the Free Software Foundation, with special exception defined in the file
11 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12 // distribution for complete text of the license and disclaimer of any warranty.
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
17 #ifndef _SelectMgr_SortCriterion_HeaderFile
18 #define _SelectMgr_SortCriterion_HeaderFile
20 #include <Graphic3d_Vec3.hxx>
21 #include <Graphic3d_ZLayerId.hxx>
22 #include <Precision.hxx>
23 #include <Select3D_SensitiveEntity.hxx>
25 //! This class provides data and criterion for sorting candidate
26 //! entities in the process of interactive selection by mouse click
27 class SelectMgr_SortCriterion
31 Handle(Select3D_SensitiveEntity) Entity; //!< detected entity
32 gp_Pnt Point; //!< 3D point
33 Graphic3d_Vec3 Normal; //!< surface normal or 0 vector if undefined
34 Standard_Real Depth; //!< distance from the view plane to the entity
35 Standard_Real MinDist; //!< distance from the clicked point to the entity on the view plane
36 Standard_Real Tolerance; //!< tolerance used for selecting candidates
37 Standard_Integer Priority; //!< selection priority
38 Standard_Integer ZLayerPosition; //!< ZLayer rendering order index, stronger than a depth
39 Standard_Integer NbOwnerMatches; //!< overall number of entities collected for the same owner
40 Standard_Boolean ToPreferClosest; //!< whether closest object is preferred even if has less priority
45 //! Empty constructor.
46 SelectMgr_SortCriterion()
53 ToPreferClosest (Standard_True) {}
55 //! Comparison operator.
56 bool operator> (const SelectMgr_SortCriterion& theOther) const { return IsGreater (theOther); }
58 //! Comparison operator.
59 bool operator< (const SelectMgr_SortCriterion& theOther) const { return IsLower (theOther); }
61 //! Compare with another item.
62 bool IsGreater (const SelectMgr_SortCriterion& theOther) const
64 // the object within different ZLayer groups can not be compared by depth
65 if (ZLayerPosition != theOther.ZLayerPosition)
67 return ZLayerPosition > theOther.ZLayerPosition;
72 // closest object is selected unless difference is within tolerance
73 if (Abs (Depth - theOther.Depth) > (Tolerance + theOther.Tolerance))
75 return Depth < theOther.Depth;
78 // if two objects have similar depth, select the one with higher priority
79 if (Priority > theOther.Priority)
84 // if priorities are equal, one closest to the mouse
85 return Priority == theOther.Priority
86 && MinDist < theOther.MinDist;
89 // old logic (OCCT version <= 6.3.1)
90 if (Priority > theOther.Priority)
94 else if (Priority != theOther.Priority)
99 if (Abs (Depth - theOther.Depth) <= Precision::Confusion())
101 return MinDist < theOther.MinDist;
104 return Depth < theOther.Depth;
107 //! Compare with another item.
108 bool IsLower (const SelectMgr_SortCriterion& theOther) const
110 // the object within different ZLayer groups can not be compared by depth
111 if (ZLayerPosition != theOther.ZLayerPosition)
113 return ZLayerPosition < theOther.ZLayerPosition;
118 // closest object is selected unless difference is within tolerance
120 && Abs (Depth - theOther.Depth) > (Tolerance + theOther.Tolerance))
122 return Depth > theOther.Depth;
125 // if two objects have similar depth, select the one with higher priority
126 if (Priority < theOther.Priority)
131 // if priorities are equal, one closest to the mouse
132 return Priority == theOther.Priority
133 && MinDist > theOther.MinDist;
136 // old logic (OCCT version <= 6.3.1)
137 if (Priority > theOther.Priority)
141 else if (Priority != theOther.Priority)
146 if (Abs (Depth - theOther.Depth) <= Precision::Confusion())
148 return MinDist > theOther.MinDist;
151 return Depth > theOther.Depth;
156 #endif // _SelectMgr_SortCriterion_HeaderFile