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42cf5bc1 | 1 | // Created on: 1994-09-01 |

2 | // Created by: Christian CAILLET | |

3 | // Copyright (c) 1994-1999 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 | #ifndef _IGESConvGeom_HeaderFile | |

18 | #define _IGESConvGeom_HeaderFile | |

19 | ||

20 | #include <Standard.hxx> | |

21 | #include <Standard_DefineAlloc.hxx> | |

22 | #include <Standard_Handle.hxx> | |

23 | ||

24 | #include <Standard_Integer.hxx> | |

25 | #include <Standard_Real.hxx> | |

26 | class IGESGeom_SplineCurve; | |

27 | class Geom_BSplineCurve; | |

28 | class Geom2d_BSplineCurve; | |

29 | class IGESGeom_SplineSurface; | |

30 | class Geom_BSplineSurface; | |

31 | class IGESConvGeom_GeomBuilder; | |

32 | ||

33 | ||

34 | //! This package is intended to gather geometric conversion which | |

35 | //! are not immediate but can be used for several purposes : | |

36 | //! mainly, standard conversion to and from CasCade geometric and | |

37 | //! topologic data, and adaptations of IGES files as required | |

38 | //! (as replacing Spline entities to BSpline equivalents). | |

39 | class IGESConvGeom | |

40 | { | |

41 | public: | |

42 | ||

43 | DEFINE_STANDARD_ALLOC | |

44 | ||

45 | ||

46 | //! basic tool to build curves from IGESGeom (arrays of points, | |

47 | //! Transformations, evaluation of points in a datum) | |

48 | //! Converts a SplineCurve from IGES to a BSplineCurve from CasCade | |

49 | //! <epscoef> gives tolerance to consider coefficient to be nul | |

50 | //! <epsgeom> gives tolerance to consider poles to be equal | |

51 | //! The returned value is a status with these possible values : | |

52 | //! - 0 OK, done | |

53 | //! - 1 the result is not guaranteed to be C0 (with <epsgeom>) | |

54 | //! - 2 SplineType not processed (allowed : max 3) | |

55 | //! (no result produced) | |

56 | //! - 3 error during creation of control points | |

57 | //! (no result produced) | |

58 | //! - 4 polynomial equation is not correct (no result produced) | |

59 | //! - 5 less than one segment (no result produced) | |

60 | Standard_EXPORT static Standard_Integer SplineCurveFromIGES (const Handle(IGESGeom_SplineCurve)& igesent, const Standard_Real epscoef, const Standard_Real epsgeom, Handle(Geom_BSplineCurve)& result); | |

61 | ||

62 | //! Tries to increase curve continuity with tolerance <epsgeom> | |

63 | //! <continuity> is the new desired continuity, can be 1 or 2 | |

64 | //! (more than 2 is considered as 2). | |

65 | //! Returns the new maximum continuity obtained on all knots. | |

66 | //! Remark that, for instance with <continuity> = 2, even if not | |

67 | //! all the knots can be passed to C2, all knots which can be are. | |

68 | Standard_EXPORT static Standard_Integer IncreaseCurveContinuity (const Handle(Geom_BSplineCurve)& curve, const Standard_Real epsgeom, const Standard_Integer continuity = 2); | |

69 | ||

70 | Standard_EXPORT static Standard_Integer IncreaseCurveContinuity (const Handle(Geom2d_BSplineCurve)& curve, const Standard_Real epsgeom, const Standard_Integer continuity = 2); | |

71 | ||

72 | //! Converts a SplineSurface from IGES to a BSplineSurface from CasCade | |

73 | //! <epscoef> gives tolerance to consider coefficient to be nul | |

74 | //! <epsgeom> gives tolerance to consider poles to be equal | |

75 | //! The returned value is a status with these possible values : | |

76 | //! - 0 OK, done | |

77 | //! - 1 the result is not guaranteed to be C0 (with <epsgeom>) | |

78 | //! - 2 degree is not compatible with code boundary type | |

79 | //! (warning) but C0 is OK | |

80 | //! - 3 idem but C0 is not guaranteed (warning) | |

81 | //! - 4 degree has been determined to be nul, either in U or V | |

82 | //! (no result produced) | |

83 | //! - 5 less than one segment in U or V (no result produced) | |

84 | Standard_EXPORT static Standard_Integer SplineSurfaceFromIGES (const Handle(IGESGeom_SplineSurface)& igesent, const Standard_Real epscoef, const Standard_Real epsgeom, Handle(Geom_BSplineSurface)& result); | |

85 | ||

86 | //! Tries to increase Surface continuity with tolerance <epsgeom> | |

87 | //! <continuity> is the new desired continuity, can be 1 or 2 | |

88 | //! (more than 2 is considered as 2). | |

89 | //! Returns the new maximum continuity obtained on all knots. | |

90 | //! Remark that, for instance with <continuity> = 2, even if not | |

91 | //! all the knots can be passed to C2, all knots which can be are. | |

92 | Standard_EXPORT static Standard_Integer IncreaseSurfaceContinuity (const Handle(Geom_BSplineSurface)& surface, const Standard_Real epsgeom, const Standard_Integer continuity = 2); | |

93 | ||

94 | ||

95 | ||

96 | ||

97 | protected: | |

98 | ||

99 | ||

100 | ||

101 | ||

102 | ||

103 | private: | |

104 | ||

105 | ||

106 | ||

107 | ||

108 | friend class IGESConvGeom_GeomBuilder; | |

109 | ||

110 | }; | |

111 | ||

112 | ||

113 | ||

114 | ||

115 | ||

116 | ||

117 | ||

118 | #endif // _IGESConvGeom_HeaderFile |