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71 lines
2.8 KiB
C++
71 lines
2.8 KiB
C++
// Copyright (c) 2016 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_ToleranceMap_HeaderFile
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#define _SelectMgr_ToleranceMap_HeaderFile
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#include <NCollection_DataMap.hxx>
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#include <Precision.hxx>
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//! An internal class for calculation of current largest tolerance value which will be applied for creation of selecting frustum by default.
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//! Each time the selection set is deactivated, maximum tolerance value will be recalculated.
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//! If a user enables custom precision using StdSelect_ViewerSelector3d::SetPixelTolerance, it will be applied to all sensitive entities without any checks.
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class SelectMgr_ToleranceMap
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{
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public:
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//! Sets tolerance values to -1.0
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Standard_EXPORT SelectMgr_ToleranceMap();
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Standard_EXPORT ~SelectMgr_ToleranceMap();
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//! Adds the value given to map, checks if the current tolerance value
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//! should be replaced by theTolerance
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Standard_EXPORT void Add (const Standard_Integer& theTolerance);
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//! Decrements a counter of the tolerance given, checks if the current tolerance value
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//! should be recalculated
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Standard_EXPORT void Decrement (const Standard_Integer& theTolerance);
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//! Returns a current tolerance that must be applied
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Standard_Integer Tolerance() const
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{
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if (myLargestKey < 0)
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{
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return 2; // default tolerance value
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}
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return myCustomTolerance < 0
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? myLargestKey
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: myLargestKey + myCustomTolerance;
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}
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//! Sets tolerance to the given one and disables adaptive checks
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void SetCustomTolerance (const Standard_Integer theTolerance) { myCustomTolerance = theTolerance; }
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//! Unsets a custom tolerance and enables adaptive checks
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void ResetDefaults() { myCustomTolerance = -1; }
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//! Returns the value of custom tolerance regardless of it validity
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Standard_Integer CustomTolerance() const { return myCustomTolerance; }
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//! Returns true if custom tolerance value is greater than zero
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Standard_Boolean IsCustomTolSet() const { return myCustomTolerance > 0; }
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private:
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NCollection_DataMap<Standard_Integer, Standard_Integer> myTolerances;
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Standard_Integer myLargestKey;
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Standard_Integer myCustomTolerance;
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};
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#endif // _SelectMgr_ToleranceMap_HeaderFile
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