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_ZLayerId.hxx>
21 #include <Precision.hxx>
22 #include <SelectBasics_SensitiveEntity.hxx>
24 //! This class provides data and criterion for sorting candidate
25 //! entities in the process of interactive selection by mouse click
26 class SelectMgr_SortCriterion
30 Handle(SelectBasics_SensitiveEntity) Entity; //!< detected entity
31 gp_Pnt Point; //!< 3D point
32 Standard_Real Depth; //!< distance from the view plane to the entity
33 Standard_Real MinDist; //!< distance from the clicked point to the entity on the view plane
34 Standard_Real Tolerance; //!< tolerance used for selecting candidates
35 Standard_Integer Priority; //!< selection priority
36 Standard_Integer ZLayerPosition; //!< ZLayer rendering order index, stronger than a depth
37 Standard_Boolean ToPreferClosest; //!< whether closest object is preferred even if has less priority
42 //! Empty constructor.
43 SelectMgr_SortCriterion()
49 ToPreferClosest (Standard_True) {}
51 //! Comparison operator.
52 bool operator> (const SelectMgr_SortCriterion& theOther) const { return IsGreater (theOther); }
54 //! Comparison operator.
55 bool operator< (const SelectMgr_SortCriterion& theOther) const { return IsLower (theOther); }
57 //! Compare with another item.
58 bool IsGreater (const SelectMgr_SortCriterion& theOther) const
60 // the object within different ZLayer groups can not be compared by depth
61 if (ZLayerPosition != theOther.ZLayerPosition)
63 return ZLayerPosition > theOther.ZLayerPosition;
68 // closest object is selected unless difference is within tolerance
69 if (Abs (Depth - theOther.Depth) > (Tolerance + theOther.Tolerance))
71 return Depth < theOther.Depth;
74 // if two objects have similar depth, select the one with higher priority
75 if (Priority > theOther.Priority)
80 // if priorities are equal, one closest to the mouse
81 return Priority == theOther.Priority
82 && MinDist < theOther.MinDist;
85 // old logic (OCCT version <= 6.3.1)
86 if (Priority > theOther.Priority)
90 else if (Priority != theOther.Priority)
95 if (Abs (Depth - theOther.Depth) <= Precision::Confusion())
97 return MinDist < theOther.MinDist;
100 return Depth < theOther.Depth;
103 //! Compare with another item.
104 bool IsLower (const SelectMgr_SortCriterion& theOther) const
106 // the object within different ZLayer groups can not be compared by depth
107 if (ZLayerPosition != theOther.ZLayerPosition)
109 return ZLayerPosition < theOther.ZLayerPosition;
114 // closest object is selected unless difference is within tolerance
116 && Abs (Depth - theOther.Depth) > (Tolerance + theOther.Tolerance))
118 return Depth > theOther.Depth;
121 // if two objects have similar depth, select the one with higher priority
122 if (Priority < theOther.Priority)
127 // if priorities are equal, one closest to the mouse
128 return Priority == theOther.Priority
129 && MinDist > theOther.MinDist;
132 // old logic (OCCT version <= 6.3.1)
133 if (Priority > theOther.Priority)
137 else if (Priority != theOther.Priority)
142 if (Abs (Depth - theOther.Depth) <= Precision::Confusion())
144 return MinDist > theOther.MinDist;
147 return Depth > theOther.Depth;
152 #endif // _SelectMgr_SortCriterion_HeaderFile