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1 | // Copyright (c) 1999-2014 OPEN CASCADE SAS |
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2 | // |
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3 | // This file is part of Open CASCADE Technology software library. |
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4 | // |
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5 | // This library is free software; you can redistribute it and / or modify it |
6 | // under the terms of the GNU Lesser General Public 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. |
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10 | // |
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11 | // Alternatively, this file may be used under the terms of Open CASCADE |
12 | // commercial license or contractual agreement. |
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13 | |
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14 | #include <Message_ProgressScale.ixx> |
15 | |
16 | static const Standard_Real ZERO = 1e-10; |
17 | static const Standard_Real INFINITE = 1e100; |
18 | |
19 | //======================================================================= |
20 | //function : Message_ProgressScale |
21 | //purpose : |
22 | //======================================================================= |
23 | |
24 | Message_ProgressScale::Message_ProgressScale () : |
25 | myMin(0.), myMax(100.), myStep(1.), myInfinite(Standard_False), |
26 | myFirst(0.), myLast(1.) |
27 | { |
28 | } |
29 | |
30 | //======================================================================= |
31 | //function : LocalToBase |
32 | //purpose : |
33 | //======================================================================= |
34 | |
35 | Standard_Real Message_ProgressScale::LocalToBase (const Standard_Real val) const |
36 | { |
37 | if ( val <= myMin ) return myFirst; |
38 | if ( myMax - myMin <= ZERO ) return myLast; |
39 | |
40 | if ( ! myInfinite ) { |
41 | if ( val >= myMax ) return myLast; |
42 | return myFirst + ( myLast - myFirst ) * ( val - myMin ) / ( myMax - myMin ); |
43 | } |
44 | Standard_Real x = ( val - myMin ) / ( myMax - myMin ); |
45 | // return myFirst + ( myLast - myFirst ) * ( 1. - exp ( -x ) ); // exponent |
46 | return myFirst + ( myLast - myFirst ) * x / ( 1. + x ); // hyperbola |
47 | } |
48 | |
49 | //======================================================================= |
50 | //function : BaseToLocal |
51 | //purpose : |
52 | //======================================================================= |
53 | |
54 | Standard_Real Message_ProgressScale::BaseToLocal (const Standard_Real val) const |
55 | { |
56 | if ( myLast - val <= ZERO ) |
57 | return myInfinite ? INFINITE : myMax; |
58 | if ( ! myInfinite ) |
59 | return myMin + ( myMax - myMin ) * ( val - myFirst ) / ( myLast - myFirst ); |
60 | // Standard_Real x = log ( ( val - myFirst ) / ( myLast - val ) ); // exponent |
61 | Standard_Real x = ( val - myFirst ) / ( myLast - val ); // hyperbola |
62 | return myMin + x * ( myMax - myMin ); |
63 | } |