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192 lines
8.9 KiB
C++
192 lines
8.9 KiB
C++
// Created on: 1998-07-14
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// Created by: data exchange team
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// Copyright (c) 1998-1999 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 _ShapeConstruct_ProjectCurveOnSurface_HeaderFile
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#define _ShapeConstruct_ProjectCurveOnSurface_HeaderFile
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#include <Standard.hxx>
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#include <Standard_Type.hxx>
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#include <Standard_Real.hxx>
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#include <Standard_Boolean.hxx>
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#include <Standard_Integer.hxx>
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#include <gp_Pnt.hxx>
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#include <gp_Pnt2d.hxx>
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#include <MMgt_TShared.hxx>
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#include <ShapeExtend_Status.hxx>
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#include <GeomAbs_Shape.hxx>
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#include <TColgp_Array1OfPnt.hxx>
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#include <TColStd_Array1OfReal.hxx>
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#include <TColgp_Array1OfPnt2d.hxx>
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#include <TColgp_HArray1OfPnt2d.hxx>
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#include <TColStd_HArray1OfReal.hxx>
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#include <TColgp_HArray1OfPnt.hxx>
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class ShapeAnalysis_Surface;
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class Geom_Surface;
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class Geom_Curve;
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class Geom2d_Curve;
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class gp_Pnt2d;
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class ShapeConstruct_ProjectCurveOnSurface;
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DEFINE_STANDARD_HANDLE(ShapeConstruct_ProjectCurveOnSurface, MMgt_TShared)
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//! This tool provides a method for computing pcurve by projecting
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//! 3d curve onto a surface.
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//! Projection is done by 23 or more points (this number is changed
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//! for B-Splines according to the following rule:
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//! the total number of the points is not less than number of spans *
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//! (degree + 1);
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//! it is increased recursively starting with 23 and is added with 22
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//! until the condition is fulfilled).
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//! Isoparametric cases (if curve corresponds to U=const or V=const on
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//! the surface) are recognized with the given precision.
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class ShapeConstruct_ProjectCurveOnSurface : public MMgt_TShared
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{
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public:
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//! Empty constructor.
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Standard_EXPORT ShapeConstruct_ProjectCurveOnSurface();
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//! Initializes the object with all necessary parameters,
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//! i.e. surface and precision
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Standard_EXPORT virtual void Init (const Handle(Geom_Surface)& surf, const Standard_Real preci);
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//! Initializes the object with all necessary parameters,
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//! i.e. surface and precision
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Standard_EXPORT virtual void Init (const Handle(ShapeAnalysis_Surface)& surf, const Standard_Real preci);
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//! Loads a surface (in the form of Geom_Surface) to project on
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Standard_EXPORT void SetSurface (const Handle(Geom_Surface)& surf);
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//! Loads a surface (in the form of ShapeAnalysis_Surface) to project on
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Standard_EXPORT void SetSurface (const Handle(ShapeAnalysis_Surface)& surf);
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//! Sets value for current precision
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Standard_EXPORT void SetPrecision (const Standard_Real preci);
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//! Returns (modifiable) the build-curve-3d mode, by default False
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//! If True, if the projected curve has been recomputed by
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//! interpolation, the 3d curve is also rebuild by interpolation
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Standard_EXPORT Standard_Boolean& BuildCurveMode();
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//! Returns (modifiable) the flag specifying to which side of
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//! parametrical space adjust part of pcurve which lies on seam.
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//! This is required in very rare case when 3d curve which is
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//! to be projected goes partly along the seam on the closed
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//! surface with singularity (e.g. sphere), goes through the
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//! degenerated point and paerly lies on internal area of surface.
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//!
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//! If this flag is True, the seam part of such curve will be
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//! adjusted to the left side of parametric space (on sphere U=0),
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//! else to the right side (on sphere U=2*PI)
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//! Default value is True
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Standard_EXPORT Standard_Integer& AdjustOverDegenMode();
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//! Returns the status of last Peform
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Standard_EXPORT Standard_Boolean Status (const ShapeExtend_Status Status) const;
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//! Computes the projection of 3d curve onto a surface using the
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//! specialized algorithm. Returns False if projector fails,
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//! otherwise, if pcurve computed successfully, returns True.
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//! The continuity, maxdeg and nbinterval are parameters of call
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//! to Approx_CurveOnSurface. If nbinterval is equal to -1
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//! (default), this value is computed depending on source 3d curve
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//! and surface. The output curve 2D is guaranteed to be same-parameter
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//! with input curve 3D on the interval [First, Last]. If the output curve
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//! lies on a direct line the infinite line is returned, in the case
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//! same-parameter condition is satisfied.
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Standard_EXPORT virtual Standard_Boolean Perform (Handle(Geom_Curve)& c3d, const Standard_Real First, const Standard_Real Last, Handle(Geom2d_Curve)& c2d, const GeomAbs_Shape continuity = GeomAbs_C1, const Standard_Integer maxdeg = 12, const Standard_Integer nbinterval = -1);
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//! Computes the projection of 3d curve onto a surface using the
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//! standard algorithm from ProjLib. Returns False if standard
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//! projector fails or raises an exception or cuts the curve by
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//! parametrical bounds of the surface. Else, if pcurve computed
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//! successfully, returns True.
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//! The continuity, maxdeg and nbinterval are parameters of call
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//! to Approx_CurveOnSurface. If nbinterval is equal to -1
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//! (default), this value is computed depending on source 3d curve
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//! and surface.
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Standard_EXPORT Standard_Boolean PerformByProjLib (Handle(Geom_Curve)& c3d, const Standard_Real First, const Standard_Real Last, Handle(Geom2d_Curve)& c2d, const GeomAbs_Shape continuity = GeomAbs_C1, const Standard_Integer maxdeg = 12, const Standard_Integer nbinterval = -1);
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//! Computes the projection of 3d curve onto a surface using
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//! either standard projector (method PerformByProjLib()) or
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//! internal one (method Perform()). The selection is done by
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//! analyzing the surface and 3d curve and is aimed to filter
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//! the cases potentially dangerous for the standard projector.
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//! If the standard projector fails, internal one is used.
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Standard_EXPORT Standard_Boolean PerformAdvanced (Handle(Geom_Curve)& c3d, const Standard_Real First, const Standard_Real Last, Handle(Geom2d_Curve)& c2d);
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DEFINE_STANDARD_RTTIEXT(ShapeConstruct_ProjectCurveOnSurface,MMgt_TShared)
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protected:
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//! Try to approximate 3D curve by Geom2d_Line
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//! or Geom2d_BsplineCurve with degree 1 with specified tolerance.
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//! points - points obtained from 3d curve.
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//! params - parameters corresponding points on 3d curves
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//! points2d - 2d points lies on line in parametric space
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//! theTol - tolerance used for compare initial points 3d and
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//! 3d points obtained from line lying in parameric space of surface
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Standard_EXPORT Handle(Geom2d_Curve) getLine (const TColgp_Array1OfPnt& points, const TColStd_Array1OfReal& params, TColgp_Array1OfPnt2d& points2d, const Standard_Real theTol, Standard_Boolean& IsRecompute) const;
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Handle(ShapeAnalysis_Surface) mySurf;
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Standard_Real myPreci;
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Standard_Boolean myBuild;
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Standard_Integer myStatus;
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Standard_Integer myAdjustOverDegen;
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Standard_Integer myNbCashe;
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gp_Pnt myCashe3d[2];
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gp_Pnt2d myCashe2d[2];
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private:
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Standard_EXPORT Handle(Geom2d_Curve) ProjectAnalytic (const Handle(Geom_Curve)& c3d) const;
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Standard_EXPORT Standard_Boolean ApproxPCurve (const Standard_Integer nbrPnt, const TColgp_Array1OfPnt& points, const TColStd_Array1OfReal& params, TColgp_Array1OfPnt2d& points2d, Handle(Geom2d_Curve)& c2d);
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Standard_EXPORT Handle(Geom2d_Curve) InterpolatePCurve (const Standard_Integer nbrPnt, Handle(TColgp_HArray1OfPnt2d)& points2d, Handle(TColStd_HArray1OfReal)& params, const Handle(Geom_Curve)& orig) const;
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Standard_EXPORT Handle(Geom2d_Curve) ApproximatePCurve (const Standard_Integer nbrPnt, Handle(TColgp_HArray1OfPnt2d)& points2d, Handle(TColStd_HArray1OfReal)& params, const Handle(Geom_Curve)& orig) const;
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Standard_EXPORT Handle(Geom_Curve) InterpolateCurve3d (const Standard_Integer nbrPnt, Handle(TColgp_HArray1OfPnt)& points, Handle(TColStd_HArray1OfReal)& params, const Handle(Geom_Curve)& orig) const;
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Standard_EXPORT void CheckPoints (Handle(TColgp_HArray1OfPnt)& points, Handle(TColStd_HArray1OfReal)& params, Standard_Real& preci) const;
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Standard_EXPORT void CheckPoints2d (Handle(TColgp_HArray1OfPnt2d)& points, Handle(TColStd_HArray1OfReal)& params, Standard_Real& preci) const;
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Standard_EXPORT Standard_Boolean IsAnIsoparametric (const Standard_Integer nbrPnt, const TColgp_Array1OfPnt& points, const TColStd_Array1OfReal& params, Standard_Boolean& isoTypeU, Standard_Boolean& p1OnIso, gp_Pnt2d& valueP1, Standard_Boolean& p2OnIso, gp_Pnt2d& valueP2, Standard_Boolean& isoPar2d3d, Handle(Geom_Curve)& cIso, Standard_Real& t1, Standard_Real& t2, TColStd_Array1OfReal& pout) const;
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};
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#endif // _ShapeConstruct_ProjectCurveOnSurface_HeaderFile
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