aa75c0cf |
1 | // Copyright (c) 2016 OPEN CASCADE SAS |
2 | // |
3 | // This file is part of Open CASCADE Technology software library. |
4 | // |
5 | // This library is free software; you can redistribute it and/or modify it under |
6 | // the terms of the GNU Lesser General Public License version 2.1 as published |
7 | // by the Free Software Foundation, with special exception defined in the file |
8 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
9 | // distribution for complete text of the license and disclaimer of any warranty. |
10 | // |
11 | // Alternatively, this file may be used under the terms of Open CASCADE |
12 | // commercial license or contractual agreement. |
13 | |
14 | #ifndef _SelectMgr_ToleranceMap_HeaderFile |
15 | #define _SelectMgr_ToleranceMap_HeaderFile |
16 | |
17 | #include <NCollection_DataMap.hxx> |
18 | #include <Precision.hxx> |
19 | |
20 | //! An internal class for calculation of current largest tolerance value which will be applied for creation of selecting frustum by default. |
21 | //! Each time the selection set is deactivated, maximum tolerance value will be recalculated. |
22 | //! If a user enables custom precision using StdSelect_ViewerSelector3d::SetPixelTolerance, it will be applied to all sensitive entities without any checks. |
23 | class SelectMgr_ToleranceMap |
24 | { |
25 | public: |
26 | |
27 | //! Sets tolerance values to -1.0 |
28 | Standard_EXPORT SelectMgr_ToleranceMap(); |
29 | |
30 | Standard_EXPORT ~SelectMgr_ToleranceMap(); |
31 | |
32 | //! Adds the value given to map, checks if the current tolerance value |
33 | //! should be replaced by theTolerance |
34 | Standard_EXPORT void Add (const Standard_Integer& theTolerance); |
35 | |
36 | //! Decrements a counter of the tolerance given, checks if the current tolerance value |
37 | //! should be recalculated |
38 | Standard_EXPORT void Decrement (const Standard_Integer& theTolerance); |
39 | |
40 | //! Returns a current tolerance that must be applied |
41 | Standard_Integer Tolerance() const |
42 | { |
43 | if (myLargestKey < Precision::Confusion()) |
44 | { |
45 | return 2; // default tolerance value |
46 | } |
47 | return myCustomTolerance < 0 |
48 | ? myLargestKey |
49 | : myLargestKey + myCustomTolerance; |
50 | } |
51 | |
52 | //! Sets tolerance to the given one and disables adaptive checks |
53 | void SetCustomTolerance (const Standard_Integer theTolerance) { myCustomTolerance = theTolerance; } |
54 | |
55 | //! Unsets a custom tolerance and enables adaptive checks |
56 | void ResetDefaults() { myCustomTolerance = -1; } |
57 | |
58 | //! Returns the value of custom tolerance regardless of it validity |
59 | Standard_Integer CustomTolerance() const { return myCustomTolerance; } |
60 | |
61 | //! Returns true if custom tolerance value is greater than zero |
62 | Standard_Boolean IsCustomTolSet() const { return myCustomTolerance > 0; } |
63 | |
64 | private: |
65 | NCollection_DataMap<Standard_Integer, Standard_Integer> myTolerances; |
66 | Standard_Integer myLargestKey; |
67 | Standard_Integer myCustomTolerance; |
68 | }; |
69 | |
70 | #endif // _SelectMgr_ToleranceMap_HeaderFile |