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147 lines
5.2 KiB
C++
147 lines
5.2 KiB
C++
// Created on: 1993-09-13
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// Created by: Jacques GOUSSARD
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// Copyright (c) 1993-1999 Matra Datavision
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// Copyright (c) 1999-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef _Blend_Function_HeaderFile
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#define _Blend_Function_HeaderFile
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#include <Standard.hxx>
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#include <Standard_DefineAlloc.hxx>
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#include <Standard_Handle.hxx>
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#include <Blend_AppFunction.hxx>
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#include <Standard_Boolean.hxx>
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#include <TColStd_Array1OfReal.hxx>
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#include <TColgp_Array1OfPnt.hxx>
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#include <TColgp_Array1OfVec.hxx>
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#include <TColgp_Array1OfPnt2d.hxx>
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#include <TColgp_Array1OfVec2d.hxx>
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class gp_Pnt;
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class gp_Vec;
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class gp_Vec2d;
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class Blend_Point;
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//! Deferred class for a function used to compute a blending
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//! surface between two surfaces, using a guide line.
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//! The vector <X> used in Value, Values and Derivatives methods
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//! has to be the vector of the parametric coordinates U1,V1,
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//! U2,V2, of the extremities of a section on the first and
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//! second surface.
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class Blend_Function : public Blend_AppFunction
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{
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public:
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DEFINE_STANDARD_ALLOC
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//! Returns 4.
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Standard_EXPORT Standard_Integer NbVariables() const Standard_OVERRIDE;
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//! Returns the point on the first support.
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Standard_EXPORT const gp_Pnt& Pnt1() const Standard_OVERRIDE;
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//! Returns the point on the seconde support.
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Standard_EXPORT const gp_Pnt& Pnt2() const Standard_OVERRIDE;
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//! Returns the point on the first surface, at parameter
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//! Sol(1),Sol(2) (Sol is the vector used in the call of
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//! IsSolution.
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Standard_EXPORT virtual const gp_Pnt& PointOnS1() const = 0;
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//! Returns the point on the second surface, at parameter
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//! Sol(3),Sol(4) (Sol is the vector used in the call of
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//! IsSolution.
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Standard_EXPORT virtual const gp_Pnt& PointOnS2() const = 0;
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//! Returns True when it is not possible to compute
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//! the tangent vectors at PointOnS1 and/or PointOnS2.
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Standard_EXPORT virtual Standard_Boolean IsTangencyPoint() const = 0;
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//! Returns the tangent vector at PointOnS1, in 3d space.
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Standard_EXPORT virtual const gp_Vec& TangentOnS1() const = 0;
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//! Returns the tangent vector at PointOnS1, in the
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//! parametric space of the first surface.
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Standard_EXPORT virtual const gp_Vec2d& Tangent2dOnS1() const = 0;
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//! Returns the tangent vector at PointOnS2, in 3d space.
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Standard_EXPORT virtual const gp_Vec& TangentOnS2() const = 0;
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//! Returns the tangent vector at PointOnS2, in the
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//! parametric space of the second surface.
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Standard_EXPORT virtual const gp_Vec2d& Tangent2dOnS2() const = 0;
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//! Returns the tangent vector at the section,
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//! at the beginning and the end of the section, and
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//! returns the normal (of the surfaces) at
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//! these points.
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Standard_EXPORT virtual void Tangent (const Standard_Real U1,
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const Standard_Real V1,
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const Standard_Real U2,
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const Standard_Real V2,
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gp_Vec& TgFirst,
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gp_Vec& TgLast,
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gp_Vec& NormFirst,
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gp_Vec& NormLast) const = 0;
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Standard_EXPORT virtual Standard_Boolean TwistOnS1() const;
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Standard_EXPORT virtual Standard_Boolean TwistOnS2() const;
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Standard_EXPORT virtual void Section (const Blend_Point& P,
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TColgp_Array1OfPnt& Poles,
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TColgp_Array1OfPnt2d& Poles2d,
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TColStd_Array1OfReal& Weigths) Standard_OVERRIDE = 0;
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//! Used for the first and last section
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//! The method returns Standard_True if the derivatives
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//! are computed, otherwise it returns Standard_False
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Standard_EXPORT virtual Standard_Boolean Section (const Blend_Point& P,
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TColgp_Array1OfPnt& Poles,
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TColgp_Array1OfVec& DPoles,
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TColgp_Array1OfVec& D2Poles,
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TColgp_Array1OfPnt2d& Poles2d,
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TColgp_Array1OfVec2d& DPoles2d,
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TColgp_Array1OfVec2d& D2Poles2d,
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TColStd_Array1OfReal& Weigths,
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TColStd_Array1OfReal& DWeigths,
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TColStd_Array1OfReal& D2Weigths) Standard_OVERRIDE;
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protected:
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private:
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};
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#endif // _Blend_Function_HeaderFile
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