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
44 //! Empty constructor.
45 SelectMgr_SortCriterion()
53 //! Compare with another item by depth, priority and minDist.
54 bool IsCloserDepth (const SelectMgr_SortCriterion& theOther) const
56 // the object within different ZLayer groups can not be compared by depth
57 if (ZLayerPosition != theOther.ZLayerPosition)
59 return ZLayerPosition > theOther.ZLayerPosition;
62 // closest object is selected unless difference is within tolerance
63 if (Abs (Depth - theOther.Depth) > (Tolerance + theOther.Tolerance))
65 return Depth < theOther.Depth;
68 // if two objects have similar depth, select the one with higher priority
69 if (Priority > theOther.Priority)
74 // if priorities are equal, one closest to the mouse
75 return Priority == theOther.Priority
76 && MinDist < theOther.MinDist;
79 //! Compare with another item using old logic (OCCT version <= 6.3.1) with priority considered preceding depth.
80 bool IsHigherPriority (const SelectMgr_SortCriterion& theOther) const
82 // the object within different ZLayer groups can not be compared by depth
83 if (ZLayerPosition != theOther.ZLayerPosition)
85 return ZLayerPosition > theOther.ZLayerPosition;
88 if (Priority > theOther.Priority)
92 else if (Priority != theOther.Priority)
97 //if (Abs (Depth - theOther.Depth) <= (Tolerance + theOther.Tolerance))
98 if (Abs (Depth - theOther.Depth) <= Precision::Confusion())
100 return MinDist < theOther.MinDist;
103 return Depth < theOther.Depth;
108 #endif // _SelectMgr_SortCriterion_HeaderFile