// Created on: 1991-10-10 // Created by: Jean Claude VAUTHIER // Copyright (c) 1991-1999 Matra Datavision // Copyright (c) 1999-2014 OPEN CASCADE SAS // // This file is part of Open CASCADE Technology software library. // // This library is free software; you can redistribute it and/or modify it under // the terms of the GNU Lesser General Public License version 2.1 as published // by the Free Software Foundation, with special exception defined in the file // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT // distribution for complete text of the license and disclaimer of any warranty. // // Alternatively, this file may be used under the terms of Open CASCADE // commercial license or contractual agreement. #ifndef _Convert_ElementarySurfaceToBSplineSurface_HeaderFile #define _Convert_ElementarySurfaceToBSplineSurface_HeaderFile #include #include #include #include #include #include #include #include #include #include class gp_Pnt; //! Root class for algorithms which convert an elementary //! surface (cylinder, cone, sphere or torus) into a BSpline //! surface (CylinderToBSplineSurface, ConeToBSplineSurface, //! SphereToBSplineSurface, TorusToBSplineSurface). //! These algorithms all work on elementary surfaces from //! the gp package and compute all the data needed to //! construct a BSpline surface equivalent to the cylinder, //! cone, sphere or torus. This data consists of the following: //! - degrees in the u and v parametric directions, //! - periodic characteristics in the u and v parametric directions, //! - a poles table with associated weights, //! - a knots table (for the u and v parametric directions) //! with associated multiplicities. //! The abstract class //! ElementarySurfaceToBSplineSurface provides a //! framework for storing and consulting this computed data. //! This data may then be used to construct a //! Geom_BSplineSurface surface, for example. //! All those classes define algorithms to convert an //! ElementarySurface into a B-spline surface. //! This abstract class implements the methods to get //! the geometric representation of the B-spline surface. //! The B-spline representation is computed at the creation //! time in the sub classes. //! The B-spline surface is defined with its degree in the //! parametric U and V directions, its control points (Poles), //! its weights, its knots and their multiplicity. //! KeyWords : //! Convert, ElementarySurface, BSplineSurface. class Convert_ElementarySurfaceToBSplineSurface { public: DEFINE_STANDARD_ALLOC Standard_EXPORT Standard_Integer UDegree() const; //! Returns the degree for the u or v parametric direction of //! the BSpline surface whose data is computed in this framework. Standard_EXPORT Standard_Integer VDegree() const; Standard_EXPORT Standard_Integer NbUPoles() const; //! Returns the number of poles for the u or v parametric //! direction of the BSpline surface whose data is computed in this framework. Standard_EXPORT Standard_Integer NbVPoles() const; Standard_EXPORT Standard_Integer NbUKnots() const; //! Returns the number of knots for the u or v parametric //! direction of the BSpline surface whose data is computed in this framework . Standard_EXPORT Standard_Integer NbVKnots() const; Standard_EXPORT Standard_Boolean IsUPeriodic() const; //! Returns true if the BSpline surface whose data is computed //! in this framework is periodic in the u or v parametric direction. Standard_EXPORT Standard_Boolean IsVPeriodic() const; //! Returns the pole of index (UIndex,VIndex) to the poles //! table of the BSpline surface whose data is computed in this framework. //! Exceptions //! Standard_OutOfRange if, for the BSpline surface whose //! data is computed in this framework: //! - UIndex is outside the bounds of the poles table in the u //! parametric direction, or //! - VIndex is outside the bounds of the poles table in the v //! parametric direction. Standard_EXPORT gp_Pnt Pole (const Standard_Integer UIndex, const Standard_Integer VIndex) const; //! Returns the weight of the pole of index (UIndex,VIndex) to //! the poles table of the BSpline surface whose data is computed in this framework. //! Exceptions //! Standard_OutOfRange if, for the BSpline surface whose //! data is computed in this framework: //! - UIndex is outside the bounds of the poles table in the u //! parametric direction, or //! - VIndex is outside the bounds of the poles table in the v //! parametric direction. Standard_EXPORT Standard_Real Weight (const Standard_Integer UIndex, const Standard_Integer VIndex) const; //! Returns the U-knot of range UIndex. //! Raised if UIndex < 1 or UIndex > NbUKnots. Standard_EXPORT Standard_Real UKnot (const Standard_Integer UIndex) const; //! Returns the V-knot of range VIndex. //! Raised if VIndex < 1 or VIndex > NbVKnots. Standard_EXPORT Standard_Real VKnot (const Standard_Integer UIndex) const; //! Returns the multiplicity of the U-knot of range UIndex. //! Raised if UIndex < 1 or UIndex > NbUKnots. Standard_EXPORT Standard_Integer UMultiplicity (const Standard_Integer UIndex) const; //! Returns the multiplicity of the V-knot of range VIndex. //! Raised if VIndex < 1 or VIndex > NbVKnots. Standard_EXPORT Standard_Integer VMultiplicity (const Standard_Integer VIndex) const; protected: Standard_EXPORT Convert_ElementarySurfaceToBSplineSurface(const Standard_Integer NumberOfUPoles, const Standard_Integer NumberOfVPoles, const Standard_Integer NumberOfUKnots, const Standard_Integer NumberOfVKnots, const Standard_Integer UDegree, const Standard_Integer VDegree); TColgp_Array2OfPnt poles; TColStd_Array2OfReal weights; TColStd_Array1OfReal uknots; TColStd_Array1OfInteger umults; TColStd_Array1OfReal vknots; TColStd_Array1OfInteger vmults; Standard_Integer udegree; Standard_Integer vdegree; Standard_Integer nbUPoles; Standard_Integer nbVPoles; Standard_Integer nbUKnots; Standard_Integer nbVKnots; Standard_Boolean isuperiodic; Standard_Boolean isvperiodic; private: }; #endif // _Convert_ElementarySurfaceToBSplineSurface_HeaderFile