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108 lines
3.6 KiB
C++
108 lines
3.6 KiB
C++
// Created on: 1998-03-26
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// Created by: Robert COUBLANC
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// Copyright (c) 1998-1999 Matra Datavision
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// Copyright (c) 1999-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef _SelectMgr_SortCriterion_HeaderFile
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#define _SelectMgr_SortCriterion_HeaderFile
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#include <Graphic3d_Vec3.hxx>
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#include <Precision.hxx>
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#include <Select3D_SensitiveEntity.hxx>
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//! This class provides data and criterion for sorting candidate
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//! entities in the process of interactive selection by mouse click
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class SelectMgr_SortCriterion
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{
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public:
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Handle(Select3D_SensitiveEntity) Entity; //!< detected entity
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gp_Pnt Point; //!< 3D point
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Graphic3d_Vec3 Normal; //!< surface normal or 0 vector if undefined
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Standard_Real Depth; //!< distance from the view plane to the entity
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Standard_Real MinDist; //!< distance from the clicked point to the entity on the view plane
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Standard_Real Tolerance; //!< tolerance used for selecting candidates
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Standard_Integer Priority; //!< selection priority
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Standard_Integer ZLayerPosition; //!< ZLayer rendering order index, stronger than a depth
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Standard_Integer NbOwnerMatches; //!< overall number of entities collected for the same owner
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public:
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DEFINE_STANDARD_ALLOC
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//! Empty constructor.
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SelectMgr_SortCriterion()
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: Depth (0.0),
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MinDist (0.0),
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Tolerance(0.0),
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Priority (0),
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ZLayerPosition (0),
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NbOwnerMatches (0) {}
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//! Compare with another item by depth, priority and minDist.
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bool IsCloserDepth (const SelectMgr_SortCriterion& theOther) const
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{
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// the object within different ZLayer groups can not be compared by depth
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if (ZLayerPosition != theOther.ZLayerPosition)
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{
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return ZLayerPosition > theOther.ZLayerPosition;
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}
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// closest object is selected unless difference is within tolerance
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if (Abs (Depth - theOther.Depth) > (Tolerance + theOther.Tolerance))
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{
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return Depth < theOther.Depth;
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}
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// if two objects have similar depth, select the one with higher priority
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if (Priority > theOther.Priority)
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{
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return true;
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}
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// if priorities are equal, one closest to the mouse
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return Priority == theOther.Priority
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&& MinDist < theOther.MinDist;
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}
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//! Compare with another item using old logic (OCCT version <= 6.3.1) with priority considered preceding depth.
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bool IsHigherPriority (const SelectMgr_SortCriterion& theOther) const
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{
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// the object within different ZLayer groups can not be compared by depth
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if (ZLayerPosition != theOther.ZLayerPosition)
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{
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return ZLayerPosition > theOther.ZLayerPosition;
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}
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if (Priority > theOther.Priority)
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{
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return true;
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}
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else if (Priority != theOther.Priority)
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{
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return false;
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}
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//if (Abs (Depth - theOther.Depth) <= (Tolerance + theOther.Tolerance))
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if (Abs (Depth - theOther.Depth) <= Precision::Confusion())
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{
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return MinDist < theOther.MinDist;
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}
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return Depth < theOther.Depth;
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}
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};
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#endif // _SelectMgr_SortCriterion_HeaderFile
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