0031477: Visualization, TKOpenGl - fetch/wrap getBufferSubData() function from WebGL 2.0
[occt.git] / src / GeomLib / GeomLib_LogSample.cxx
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1// Created on: 1998-09-23
2// Created by: Philippe MANGIN
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
18#include <GeomLib_LogSample.hxx>
19#include <Standard_OutOfRange.hxx>
20
21GeomLib_LogSample::GeomLib_LogSample(const Standard_Real A,
22 const Standard_Real B,
23 const Standard_Integer N)
24 :math_FunctionSample(A, B, N)
25{
26 myF = A - 1;
27 myexp = Log(B-A)/N;
28}
29
30Standard_Real GeomLib_LogSample::GetParameter(const Standard_Integer Index) const
31{
32 Standard_Integer aN = NbPoints();
33
34
35 if ((Index >= aN) || (Index <= 1)) {
36 Standard_Real aA, aB;
37 Bounds(aA, aB);
38 if (Index == 1) return aA;
39 else if (Index == aN) return aB;
40 else throw Standard_OutOfRange("GeomLib_LogSample::GetParameter");
41 }
42
43 Standard_Real v = myF + Exp(myexp*Index);
44 return v;
45}