include/opencascade/ShapeCustom_Curve2d.hxx

0001 // Created on: 2001-12-20
0002 // Created by: Pavel TELKOV
0003 // Copyright (c) 2001-2014 OPEN CASCADE SAS
0004 //
0005 // This file is part of Open CASCADE Technology software library.
0006 //
0007 // This library is free software; you can redistribute it and/or modify it under
0008 // the terms of the GNU Lesser General Public License version 2.1 as published
0009 // by the Free Software Foundation, with special exception defined in the file
0010 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
0011 // distribution for complete text of the license and disclaimer of any warranty.
0012 //
0013 // Alternatively, this file may be used under the terms of Open CASCADE
0014 // commercial license or contractual agreement.
0015
0016 #ifndef _ShapeCustom_Curve2d_HeaderFile
0017 #define _ShapeCustom_Curve2d_HeaderFile
0018
0019 #include <Standard.hxx>
0020 #include <Standard_DefineAlloc.hxx>
0021 #include <Standard_Handle.hxx>
0022
0023 #include <TColgp_Array1OfPnt2d.hxx>
0024 class Geom2d_Line;
0025 class Geom2d_Curve;
0026 class Geom2d_BSplineCurve;
0027
0028
0029 //! Converts curve2d to analytical form with given
0030 //! precision or simpify curve2d.
0031 class ShapeCustom_Curve2d
0032 {
0033 public:
0034
0035   DEFINE_STANDARD_ALLOC
0036
0037
0038   //! Check if poleses is in the plane with given precision
0039   //! Returns false if no.
0040   Standard_EXPORT static Standard_Boolean IsLinear (const TColgp_Array1OfPnt2d& thePoles, const Standard_Real theTolerance, Standard_Real& theDeviation);
0041
0042   //! Try to convert BSpline2d or Bezier2d to line 2d
0043   //! only if it is linear. Recalculate first and last parameters.
0044   //! Returns line2d or null curve2d.
0045   Standard_EXPORT static Handle(Geom2d_Line) ConvertToLine2d (const Handle(Geom2d_Curve)& theCurve, const Standard_Real theFirstIn, const Standard_Real theLastIn, const Standard_Real theTolerance, Standard_Real& theNewFirst, Standard_Real& theNewLast, Standard_Real& theDeviation);
0046
0047   //! Try to remove knots from bspline where local derivatives are the same.
0048   //! Remove knots with given precision.
0049   //! Returns false if Bsplien was not modified
0050   Standard_EXPORT static Standard_Boolean SimplifyBSpline2d (Handle(Geom2d_BSplineCurve)& theBSpline2d, const Standard_Real theTolerance);
0051
0052
0053
0054
0055 protected:
0056
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0059
0060
0061 private:
0062
0063
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0065
0066
0067 };
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0074
0075 #endif // _ShapeCustom_Curve2d_HeaderFile