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 5 // 6 // This file is part of Open CASCADE Technology software library. 7 // 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. 13 // 14 // Alternatively, this file may be used under the terms of Open CASCADE 15 // commercial license or contractual agreement. 16 17 #ifndef _SelectMgr_SortCriterion_HeaderFile 18 #define _SelectMgr_SortCriterion_HeaderFile 19 20 #include <Graphic3d_ZLayerId.hxx> 21 #include <Precision.hxx> 22 #include <Select3D_SensitiveEntity.hxx> 23 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 27 { 28 public: 29 30 Handle(Select3D_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_Integer NbOwnerMatches; //!< overall number of entities collected for the same owner 38 Standard_Boolean ToPreferClosest; //!< whether closest object is preferred even if has less priority 39 40 public: 41 DEFINE_STANDARD_ALLOC 42 43 //! Empty constructor. SelectMgr_SortCriterion()44 SelectMgr_SortCriterion() 45 : Depth (0.0), 46 MinDist (0.0), 47 Tolerance(0.0), 48 Priority (0), 49 ZLayerPosition (0), 50 NbOwnerMatches (0), 51 ToPreferClosest (Standard_True) {} 52 53 //! Comparison operator. operator >(const SelectMgr_SortCriterion & theOther) const54 bool operator> (const SelectMgr_SortCriterion& theOther) const { return IsGreater (theOther); } 55 56 //! Comparison operator. operator <(const SelectMgr_SortCriterion & theOther) const57 bool operator< (const SelectMgr_SortCriterion& theOther) const { return IsLower (theOther); } 58 59 //! Compare with another item. IsGreater(const SelectMgr_SortCriterion & theOther) const60 bool IsGreater (const SelectMgr_SortCriterion& theOther) const 61 { 62 // the object within different ZLayer groups can not be compared by depth 63 if (ZLayerPosition != theOther.ZLayerPosition) 64 { 65 return ZLayerPosition > theOther.ZLayerPosition; 66 } 67 68 if (ToPreferClosest) 69 { 70 // closest object is selected unless difference is within tolerance 71 if (Abs (Depth - theOther.Depth) > (Tolerance + theOther.Tolerance)) 72 { 73 return Depth < theOther.Depth; 74 } 75 76 // if two objects have similar depth, select the one with higher priority 77 if (Priority > theOther.Priority) 78 { 79 return true; 80 } 81 82 // if priorities are equal, one closest to the mouse 83 return Priority == theOther.Priority 84 && MinDist < theOther.MinDist; 85 } 86 87 // old logic (OCCT version <= 6.3.1) 88 if (Priority > theOther.Priority) 89 { 90 return true; 91 } 92 else if (Priority != theOther.Priority) 93 { 94 return false; 95 } 96 97 if (Abs (Depth - theOther.Depth) <= Precision::Confusion()) 98 { 99 return MinDist < theOther.MinDist; 100 } 101 102 return Depth < theOther.Depth; 103 } 104 105 //! Compare with another item. IsLower(const SelectMgr_SortCriterion & theOther) const106 bool IsLower (const SelectMgr_SortCriterion& theOther) const 107 { 108 // the object within different ZLayer groups can not be compared by depth 109 if (ZLayerPosition != theOther.ZLayerPosition) 110 { 111 return ZLayerPosition < theOther.ZLayerPosition; 112 } 113 114 if (ToPreferClosest) 115 { 116 // closest object is selected unless difference is within tolerance 117 if (ToPreferClosest 118 && Abs (Depth - theOther.Depth) > (Tolerance + theOther.Tolerance)) 119 { 120 return Depth > theOther.Depth; 121 } 122 123 // if two objects have similar depth, select the one with higher priority 124 if (Priority < theOther.Priority) 125 { 126 return true; 127 } 128 129 // if priorities are equal, one closest to the mouse 130 return Priority == theOther.Priority 131 && MinDist > theOther.MinDist; 132 } 133 134 // old logic (OCCT version <= 6.3.1) 135 if (Priority > theOther.Priority) 136 { 137 return false; 138 } 139 else if (Priority != theOther.Priority) 140 { 141 return true; 142 } 143 144 if (Abs (Depth - theOther.Depth) <= Precision::Confusion()) 145 { 146 return MinDist > theOther.MinDist; 147 } 148 149 return Depth > theOther.Depth; 150 } 151 152 }; 153 154 #endif // _SelectMgr_SortCriterion_HeaderFile 155