// File generated by CPPExt (Transient)
//
//
//                     Copyright (C) 1991 - 2000 by  
//                      Matra Datavision SA.  All rights reserved.
//  
//                     Copyright (C) 2001 - 2004 by
//                     Open CASCADE SA.  All rights reserved.
// 
// This file is part of the Open CASCADE Technology software.
//
// This software may be distributed and/or modified under the terms and
// conditions of the Open CASCADE Public License as defined by Open CASCADE SA
// and appearing in the file LICENSE included in the packaging of this file.
//  
// This software is distributed on an "AS IS" basis, without warranty of any
// kind, and Open CASCADE SA hereby disclaims all such warranties,
// including without limitation, any warranties of merchantability, fitness
// for a particular purpose or non-infringement. Please see the License for
// the specific terms and conditions governing rights and limitations under the
// License.

#ifndef _AIS_TangentRelation_HeaderFile
#define _AIS_TangentRelation_HeaderFile

#ifndef _Standard_HeaderFile
#include <Standard.hxx>
#endif
#ifndef _Handle_AIS_TangentRelation_HeaderFile
#include <Handle_AIS_TangentRelation.hxx>
#endif

#ifndef _gp_Pnt_HeaderFile
#include <gp_Pnt.hxx>
#endif
#ifndef _gp_Dir_HeaderFile
#include <gp_Dir.hxx>
#endif
#ifndef _Standard_Real_HeaderFile
#include <Standard_Real.hxx>
#endif
#ifndef _Standard_Integer_HeaderFile
#include <Standard_Integer.hxx>
#endif
#ifndef _AIS_Relation_HeaderFile
#include <AIS_Relation.hxx>
#endif
#ifndef _Handle_Geom_Plane_HeaderFile
#include <Handle_Geom_Plane.hxx>
#endif
#ifndef _Handle_PrsMgr_PresentationManager3d_HeaderFile
#include <Handle_PrsMgr_PresentationManager3d.hxx>
#endif
#ifndef _Handle_Prs3d_Presentation_HeaderFile
#include <Handle_Prs3d_Presentation.hxx>
#endif
#ifndef _Handle_Prs3d_Projector_HeaderFile
#include <Handle_Prs3d_Projector.hxx>
#endif
#ifndef _Handle_PrsMgr_PresentationManager2d_HeaderFile
#include <Handle_PrsMgr_PresentationManager2d.hxx>
#endif
#ifndef _Handle_Graphic2d_GraphicObject_HeaderFile
#include <Handle_Graphic2d_GraphicObject.hxx>
#endif
#ifndef _Handle_Geom_Transformation_HeaderFile
#include <Handle_Geom_Transformation.hxx>
#endif
#ifndef _Handle_SelectMgr_Selection_HeaderFile
#include <Handle_SelectMgr_Selection.hxx>
#endif
class TopoDS_Shape;
class Geom_Plane;
class PrsMgr_PresentationManager3d;
class Prs3d_Presentation;
class Prs3d_Projector;
class PrsMgr_PresentationManager2d;
class Graphic2d_GraphicObject;
class Geom_Transformation;
class SelectMgr_Selection;


//! A framework to display tangency constraints between <br>
//! two or more Interactive Objects of the datum type. <br>
//! The datums are normally faces or edges. <br>
class AIS_TangentRelation : public AIS_Relation {

public:
 // Methods PUBLIC
 // 

//!  TwoFacesTangent or TwoEdgesTangent relation <br>//! Constructs an object to display tangency constraints. <br>
//! This object is defined by the first shape aFShape, the <br>
//! second shape aSShape, the plane aPlane and the index anExternRef. <br>
//! aPlane serves as an optional axis. <br>
//! anExternRef set to 0 indicates that there is no relation. <br>
Standard_EXPORT AIS_TangentRelation(const TopoDS_Shape& aFShape,const TopoDS_Shape& aSShape,const Handle(Geom_Plane)& aPlane,const Standard_Integer anExternRef = 0);

//! Returns the external reference for tangency. <br>
//! The values are as follows: <br>
//! -   0 - there is no connection; <br>
//! -   1 - there is a connection to the first shape; <br>
//! -   2 - there is a connection to the second shape. <br>
//!   This reference is defined at construction time. <br>
Standard_EXPORT   Standard_Integer ExternRef() ;

//! Sets the external reference for tangency, aRef. <br>
//! The values are as follows: <br>
//! -   0 - there is no connection; <br>
//! -   1 - there is a connection to the first shape; <br>
//! -   2 - there is a connection to the second shape. <br>
//! This reference is initially defined at construction time. <br>
Standard_EXPORT   void SetExternRef(const Standard_Integer aRef) ;

//! computes the presentation according to a point of view <br>
//!          given by <aProjector>. <br>
//!          To be Used when the associated degenerated Presentations <br>
//!          have been transformed by <aTrsf> which is not a Pure <br>
//!          Translation. The HLR Prs can't be deducted automatically <br>
//!          WARNING :<aTrsf> must be applied <br>
//!           to the object to display before computation  !!! <br>
Standard_EXPORT virtual  void Compute(const Handle(Prs3d_Projector)& aProjector,const Handle(Geom_Transformation)& aTrsf,const Handle(Prs3d_Presentation)& aPresentation) ;
//Standard_EXPORT ~AIS_TangentRelation();




 // Type management
 //
 Standard_EXPORT const Handle(Standard_Type)& DynamicType() const;
 //Standard_EXPORT Standard_Boolean	       IsKind(const Handle(Standard_Type)&) const;

protected:

 // Methods PROTECTED
 // 


 // Fields PROTECTED
 //


private: 

 // Methods PRIVATE
 // 


Standard_EXPORT   void Compute(const Handle(PrsMgr_PresentationManager3d)& aPresentationManager,const Handle(Prs3d_Presentation)& aPresentation,const Standard_Integer aMode = 0) ;


Standard_EXPORT   void Compute(const Handle(Prs3d_Projector)& aProjector,const Handle(Prs3d_Presentation)& aPresentation) ;


Standard_EXPORT   void Compute(const Handle(PrsMgr_PresentationManager2d)& aPresentationManager,const Handle(Graphic2d_GraphicObject)& aPresentation,const Standard_Integer aMode = 0) ;


Standard_EXPORT   void ComputeSelection(const Handle(SelectMgr_Selection)& aSelection,const Standard_Integer aMode) ;


Standard_EXPORT   void ComputeTwoFacesTangent(const Handle(Prs3d_Presentation)& aPresentation) ;


Standard_EXPORT   void ComputeTwoEdgesTangent(const Handle(Prs3d_Presentation)& aPresentation) ;


 // Fields PRIVATE
 //
gp_Pnt myAttach;
gp_Dir myDir;
Standard_Real myLength;
Standard_Integer myExternRef;


};





// other Inline functions and methods (like "C++: function call" methods)
//


#endif
