// Created on: 1992-01-30
// Created by: Didier PIFFAULT
// Copyright (c) 1992-1999 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 _TopTrans_SurfaceTransition_HeaderFile
#define _TopTrans_SurfaceTransition_HeaderFile
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
class gp_Dir;
//! This algorithm is used to compute the transition
//! of a 3D surface intersecting a topological surfacic
//! boundary on a 3D curve ( intersection curve ).
//! The boundary is described by a set of faces
//! each face is described by
//! - its support surface,
//! - an orientation defining its matter side.
//! The geometric elements are described locally at the
//! intersection point by a second order development.
//! A surface is described by the normal vector, the
//! principal directions and the principal curvatures.
//! A curve is described by the tangent, the normal
//! and the curvature.
//! The algorithm keeps track of the two faces elements
//! closest to the part of the curve "before" and "after"
//! the intersection, these two elements are updated
//! for each new face.
//! The position of the curve can be computed when at
//! least one surface element has been given, this
//! position is "In","Out" or "On" for the part of the
//! curve "Before" or "After" the intersection.
class TopTrans_SurfaceTransition
{
public:
DEFINE_STANDARD_ALLOC
//! Create an empty Surface Transition.
Standard_EXPORT TopTrans_SurfaceTransition();
//! Initialize a Surface Transition with the local
//! description of the intersection curve and of the
//! reference surface.
//! PREQUESITORY : Norm oriented OUTSIDE "geometric matter"
Standard_EXPORT void Reset (const gp_Dir& Tgt, const gp_Dir& Norm, const gp_Dir& MaxD, const gp_Dir& MinD, const Standard_Real MaxCurv, const Standard_Real MinCurv);
//! Initialize a Surface Transition with the local
//! description of a straight line.
Standard_EXPORT void Reset (const gp_Dir& Tgt, const gp_Dir& Norm);
//! Add a face element to the boundary.
//!
//! - S defines topological orientation for the face :
//! S FORWARD means: along the intersection curve on the
//! reference surface, transition states while crossing
//! the face are OUT,IN.
//! S REVERSED means states are IN,OUT.
//! S INTERNAL means states are IN,IN.
//!
//! - O defines curve's position on face :
//! O FORWARD means the face is before the intersection
//! O REVERSED means the face is AFTER
//! O INTERNAL means the curve intersection is in the face.
//! PREQUESITORY : Norm oriented OUTSIDE "geometric matter"
Standard_EXPORT void Compare (const Standard_Real Tole, const gp_Dir& Norm, const gp_Dir& MaxD, const gp_Dir& MinD, const Standard_Real MaxCurv, const Standard_Real MinCurv, const TopAbs_Orientation S, const TopAbs_Orientation O);
//! Add a plane or a cylindric face to the boundary.
Standard_EXPORT void Compare (const Standard_Real Tole, const gp_Dir& Norm, const TopAbs_Orientation S, const TopAbs_Orientation O);
//! Returns the state of the reference surface before
//! the interference, this is the position relative to
//! the surface of a point very close to the intersection
//! on the negative side of the tangent.
Standard_EXPORT TopAbs_State StateBefore() const;
//! Returns the state of the reference surface after
//! interference, this is the position relative to the
//! surface of a point very close to the intersection
//! on the positive side of the tangent.
Standard_EXPORT TopAbs_State StateAfter() const;
Standard_EXPORT static TopAbs_State GetBefore (const TopAbs_Orientation Tran);
Standard_EXPORT static TopAbs_State GetAfter (const TopAbs_Orientation Tran);
protected:
private:
Standard_EXPORT void UpdateReference (const Standard_Real Tole, const Standard_Boolean isInfRef, Standard_Real& CosInf, Standard_Real& CosSup, const TopAbs_Orientation Tran, TopAbs_Orientation& TranRef);
Standard_EXPORT Standard_Real ComputeCos (const Standard_Real Tole, const gp_Dir& Norm, const TopAbs_Orientation O, Standard_Boolean& isleft) const;
gp_Dir myTgt;
gp_Dir myNorm;
gp_Dir beafter;
Standard_Real myCurvRef;
TColStd_Array2OfReal myAng;
TColStd_Array2OfReal myCurv;
TopTrans_Array2OfOrientation myOri;
Standard_Boolean myTouchFlag;
};
#endif // _TopTrans_SurfaceTransition_HeaderFile