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 // Created on: 1991-07-23
 // Created by: Christophe MARION
 // 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 _BRepPrim_OneAxis_HeaderFile
 #define _BRepPrim_OneAxis_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_DefineAlloc.hxx>
 
 #include <BRepPrim_Builder.hxx>
 #include <gp_Ax2.hxx>
 #include <TopoDS_Shell.hxx>
 #include <TopoDS_Vertex.hxx>
 #include <TopoDS_Edge.hxx>
 #include <TopoDS_Wire.hxx>
 #include <TopoDS_Face.hxx>
 class gp_Pnt2d;
 
 
 //! Algorithm to  build  primitives with  one  axis of
 //! revolution.
 //!
 //! The revolution  body is described by :
 //!
 //! A coordinate  system (Ax2 from  gp). The Z axis is
 //! the rotational axis.
 //!
 //! An Angle around the Axis, When  the Angle  is 2*PI
 //! the primitive is not limited  by planar faces. The
 //! U parameter range from 0 to Angle.
 //!
 //! A parameter range VMin, VMax on the meridian.
 //!
 //! A meridian : The  meridian is a curve described by
 //! a set of deferred methods.
 //!
 //! The  topology consists of  A shell,  Faces,  Wires,
 //! Edges and Vertices.  Methods  are provided to build
 //! all the elements.  Building an element  implies the
 //! automatic building  of  all its  sub-elements.
 //!
 //! So building the shell builds everything.
 //!
 //! There are at most 5 faces :
 //!
 //! - The LateralFace.
 //!
 //! - The TopFace and the BottomFace.
 //!
 //! - The StartFace and the EndFace.
 class BRepPrim_OneAxis 
 {
 public:
 
   DEFINE_STANDARD_ALLOC
 
   
   //! The MeridianOffset is added  to the  parameters on
   //! the meridian curve and  to  the  V values  of  the
   //! pcurves. This is  used for the sphere for example,
   //! to give a range on the meridian  edge which is not
   //! VMin, VMax.
   Standard_EXPORT void SetMeridianOffset (const Standard_Real MeridianOffset = 0);
   
   //! Returns the Ax2 from <me>.
   Standard_EXPORT const gp_Ax2& Axes() const;
   
   Standard_EXPORT void Axes (const gp_Ax2& A);
   
   Standard_EXPORT Standard_Real Angle() const;
   
   Standard_EXPORT void Angle (const Standard_Real A);
   
   Standard_EXPORT Standard_Real VMin() const;
   
   Standard_EXPORT void VMin (const Standard_Real V);
   
   Standard_EXPORT Standard_Real VMax() const;
   
   Standard_EXPORT void VMax (const Standard_Real V);
   
   //! Returns a face with  no edges.  The surface is the
   //! lateral surface with normals pointing outward. The
   //! U parameter is the angle with the  origin on the X
   //! axis. The  V parameter is   the  parameter of  the
   //! meridian.
   Standard_EXPORT virtual TopoDS_Face MakeEmptyLateralFace() const = 0;
   
   //! Returns  an  edge with  a 3D curve   made from the
   //! meridian  in the XZ  plane rotated by <Ang> around
   //! the Z-axis. Ang may be 0 or myAngle.
   Standard_EXPORT virtual TopoDS_Edge MakeEmptyMeridianEdge (const Standard_Real Ang) const = 0;
   
   //! Sets the  parametric curve of the  edge <E> in the
   //! face  <F> to be  the   2d representation  of   the
   //! meridian.
   Standard_EXPORT virtual void SetMeridianPCurve (TopoDS_Edge& E, const TopoDS_Face& F) const = 0;
   
   //! Returns the meridian point at parameter <V> in the
   //! plane XZ.
   Standard_EXPORT virtual gp_Pnt2d MeridianValue (const Standard_Real V) const = 0;
   
   //! Returns True if the point of  parameter <V> on the
   //! meridian is on the Axis. Default implementation is
   //! Abs(MeridianValue(V).X()) < Precision::Confusion()
   Standard_EXPORT virtual Standard_Boolean MeridianOnAxis (const Standard_Real V) const;
   
   //! Returns True  if the  meridian is  closed. Default
   //! implementation                                  is
   //! MeridianValue(VMin).IsEqual(MeridianValue(VMax),
   //! Precision::Confusion())
   Standard_EXPORT virtual Standard_Boolean MeridianClosed() const;
   
   //! Returns  True   if  VMax    is  infinite.  Default
   //! Precision::IsPositiveInfinite(VMax);
   Standard_EXPORT virtual Standard_Boolean VMaxInfinite() const;
   
   //! Returns  True   if  VMin    is  infinite.  Default
   //! Precision::IsNegativeInfinite(VMax);
   Standard_EXPORT virtual Standard_Boolean VMinInfinite() const;
   
   //! Returns True if  there is  a top  face.
   //!
   //! That is neither : VMaxInfinite()
   //! MeridianClosed()
   //! MeridianOnAxis(VMax)
   Standard_EXPORT virtual Standard_Boolean HasTop() const;
   
   //! Returns   True if there is   a bottom  face.
   //!
   //! That is neither : VMinInfinite()
   //! MeridianClosed()
   //! MeridianOnAxis(VMin)
   Standard_EXPORT virtual Standard_Boolean HasBottom() const;
   
   //! Returns True if  there are Start   and  End faces.
   //!
   //! That is : 2*PI  - Angle > Precision::Angular()
   Standard_EXPORT virtual Standard_Boolean HasSides() const;
   
   //! Returns the Shell containing all the  Faces of the
   //! primitive.
   Standard_EXPORT const TopoDS_Shell& Shell();
   
   //! Returns  the lateral Face.   It is oriented toward
   //! the outside of the primitive.
   Standard_EXPORT const TopoDS_Face& LateralFace();
   
   //! Returns the   top planar  Face.    It  is Oriented
   //! toward the +Z axis (outside).
   Standard_EXPORT const TopoDS_Face& TopFace();
   
   //! Returns  the Bottom planar Face.   It is  Oriented
   //! toward the -Z axis (outside).
   Standard_EXPORT const TopoDS_Face& BottomFace();
   
   //! Returns  the  Face   starting   the slice, it   is
   //! oriented toward the exterior of the primitive.
   Standard_EXPORT const TopoDS_Face& StartFace();
   
   //! Returns the Face ending the slice, it  is oriented
   //! toward the exterior of the primitive.
   Standard_EXPORT const TopoDS_Face& EndFace();
   
   //! Returns  the wire in the lateral face.
   Standard_EXPORT const TopoDS_Wire& LateralWire();
   
   //! Returns the   wire in the   lateral  face with the
   //! start edge.
   Standard_EXPORT const TopoDS_Wire& LateralStartWire();
   
   //! Returns the wire with in lateral face with the end
   //! edge.
   Standard_EXPORT const TopoDS_Wire& LateralEndWire();
   
   //! Returns the wire in the top face.
   Standard_EXPORT const TopoDS_Wire& TopWire();
   
   //! Returns the wire in the bottom face.
   Standard_EXPORT const TopoDS_Wire& BottomWire();
   
   //! Returns the wire  in the  start face.
   Standard_EXPORT const TopoDS_Wire& StartWire();
   
   //! Returns  the wire   in the  start   face  with the
   //! AxisEdge.
   Standard_EXPORT const TopoDS_Wire& AxisStartWire();
   
   //! Returns the Wire in   the end face.
   Standard_EXPORT const TopoDS_Wire& EndWire();
   
   //! Returns  the Wire  in  the   end   face  with  the
   //! AxisEdge.
   Standard_EXPORT const TopoDS_Wire& AxisEndWire();
   
   //! Returns the Edge built along the Axis and oriented
   //! on +Z of the Axis.
   Standard_EXPORT const TopoDS_Edge& AxisEdge();
   
   //! Returns the   Edge at angle 0.
   Standard_EXPORT const TopoDS_Edge& StartEdge();
   
   //! Returns the  Edge at  angle Angle.  If !HasSides()
   //! the StartEdge and the EndEdge are the same edge.
   Standard_EXPORT const TopoDS_Edge& EndEdge();
   
   //! Returns the linear Edge between start Face and top
   //! Face.
   Standard_EXPORT const TopoDS_Edge& StartTopEdge();
   
   //! Returns the linear  Edge between  start  Face  and
   //! bottom Face.
   Standard_EXPORT const TopoDS_Edge& StartBottomEdge();
   
   //! Returns the linear Edge  between end Face and  top
   //! Face.
   Standard_EXPORT const TopoDS_Edge& EndTopEdge();
   
   //! Returns  the  linear  Edge  between end  Face  and
   //! bottom Face.
   Standard_EXPORT const TopoDS_Edge& EndBottomEdge();
   
   //! Returns the edge at VMax. If  MeridianClosed() the
   //! TopEdge and the BottomEdge are the same edge.
   Standard_EXPORT const TopoDS_Edge& TopEdge();
   
   //! Returns the edge  at VMin. If MeridianClosed() the
   //! TopEdge and the BottomEdge are the same edge.
   Standard_EXPORT const TopoDS_Edge& BottomEdge();
   
   //! Returns the Vertex at the Top altitude on the axis.
   Standard_EXPORT const TopoDS_Vertex& AxisTopVertex();
   
   //! Returns the Vertex  at the Bottom  altitude on the
   //! axis.
   Standard_EXPORT const TopoDS_Vertex& AxisBottomVertex();
   
   //! Returns the vertex (0,VMax)
   Standard_EXPORT const TopoDS_Vertex& TopStartVertex();
   
   //! Returns the vertex (angle,VMax)
   Standard_EXPORT const TopoDS_Vertex& TopEndVertex();
   
   //! Returns the vertex (0,VMin)
   Standard_EXPORT const TopoDS_Vertex& BottomStartVertex();
   
   //! Returns the vertex (angle,VMax)
   Standard_EXPORT const TopoDS_Vertex& BottomEndVertex();
   Standard_EXPORT virtual ~BRepPrim_OneAxis();
 
 
 
 
 protected:
 
   
   //! Creates a OneAxis algorithm.  <B> is used to build
   //! the Topology. The angle defaults to 2*PI.
   Standard_EXPORT BRepPrim_OneAxis(const BRepPrim_Builder& B, const gp_Ax2& A, const Standard_Real VMin, const Standard_Real VMax);
 
 
   BRepPrim_Builder myBuilder;
 
 
 private:
 
 
 
   gp_Ax2 myAxes;
   Standard_Real myAngle;
   Standard_Real myVMin;
   Standard_Real myVMax;
   Standard_Real myMeridianOffset;
   TopoDS_Shell myShell;
   Standard_Boolean ShellBuilt;
   TopoDS_Vertex myVertices[6];
   Standard_Boolean VerticesBuilt[6];
   TopoDS_Edge myEdges[9];
   Standard_Boolean EdgesBuilt[9];
   TopoDS_Wire myWires[9];
   Standard_Boolean WiresBuilt[9];
   TopoDS_Face myFaces[5];
   Standard_Boolean FacesBuilt[5];
 
 
 };
 
 
 
 
 
 
 
 #endif // _BRepPrim_OneAxis_HeaderFile

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