// Created on: 1998-07-14 // Created by: data exchange team // Copyright (c) 1998-1999 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 _ShapeConstruct_ProjectCurveOnSurface_HeaderFile #define _ShapeConstruct_ProjectCurveOnSurface_HeaderFile #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include class ShapeAnalysis_Surface; class Geom_Surface; class Geom_Curve; class Geom2d_Curve; // resolve name collisions with X11 headers #ifdef Status #undef Status #endif class ShapeConstruct_ProjectCurveOnSurface; DEFINE_STANDARD_HANDLE(ShapeConstruct_ProjectCurveOnSurface, Standard_Transient) //! This tool provides a method for computing pcurve by projecting //! 3d curve onto a surface. //! Projection is done by 23 or more points (this number is changed //! for B-Splines according to the following rule: //! the total number of the points is not less than number of spans * //! (degree + 1); //! it is increased recursively starting with 23 and is added with 22 //! until the condition is fulfilled). //! Isoparametric cases (if curve corresponds to U=const or V=const on //! the surface) are recognized with the given precision. class ShapeConstruct_ProjectCurveOnSurface : public Standard_Transient { public: //! Empty constructor. Standard_EXPORT ShapeConstruct_ProjectCurveOnSurface(); //! Initializes the object with all necessary parameters, //! i.e. surface and precision Standard_EXPORT virtual void Init (const Handle(Geom_Surface)& surf, const Standard_Real preci); //! Initializes the object with all necessary parameters, //! i.e. surface and precision Standard_EXPORT virtual void Init (const Handle(ShapeAnalysis_Surface)& surf, const Standard_Real preci); //! Loads a surface (in the form of Geom_Surface) to project on Standard_EXPORT void SetSurface (const Handle(Geom_Surface)& surf); //! Loads a surface (in the form of ShapeAnalysis_Surface) to project on Standard_EXPORT void SetSurface (const Handle(ShapeAnalysis_Surface)& surf); //! Sets value for current precision Standard_EXPORT void SetPrecision (const Standard_Real preci); //! Returns (modifiable) the build-curve-3d mode, by default False //! If True, if the projected curve has been recomputed by //! interpolation, the 3d curve is also rebuild by interpolation Standard_EXPORT Standard_Boolean& BuildCurveMode(); //! Returns (modifiable) the flag specifying to which side of //! parametrical space adjust part of pcurve which lies on seam. //! This is required in very rare case when 3d curve which is //! to be projected goes partly along the seam on the closed //! surface with singularity (e.g. sphere), goes through the //! degenerated point and paerly lies on internal area of surface. //! //! If this flag is True, the seam part of such curve will be //! adjusted to the left side of parametric space (on sphere U=0), //! else to the right side (on sphere U=2*PI) //! Default value is True Standard_EXPORT Standard_Integer& AdjustOverDegenMode(); //! Returns the status of last Perform Standard_EXPORT Standard_Boolean Status (const ShapeExtend_Status theStatus) const; //! Computes the projection of 3d curve onto a surface using the //! specialized algorithm. Returns False if projector fails, //! otherwise, if pcurve computed successfully, returns True. //! The output curve 2D is guaranteed to be same-parameter //! with input curve 3D on the interval [First, Last]. If the output curve //! lies on a direct line the infinite line is returned, in the case //! same-parameter condition is satisfied. //! TolFirst and TolLast are the tolerances at the ends of input curve 3D. Standard_EXPORT virtual Standard_Boolean Perform (Handle(Geom_Curve)& c3d, const Standard_Real First, const Standard_Real Last, Handle(Geom2d_Curve)& c2d, const Standard_Real TolFirst = -1, const Standard_Real TolLast = -1); //! Computes the projection of 3d curve onto a surface using the //! standard algorithm from ProjLib. Returns False if standard //! projector fails or raises an exception or cuts the curve by //! parametrical bounds of the surface. Else, if pcurve computed //! successfully, returns True. //! The continuity, maxdeg and nbinterval are parameters of call //! to Approx_CurveOnSurface. If nbinterval is equal to -1 //! (default), this value is computed depending on source 3d curve //! and surface. 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); DEFINE_STANDARD_RTTIEXT(ShapeConstruct_ProjectCurveOnSurface,Standard_Transient) protected: //! Try to approximate 3D curve by Geom2d_Line //! or Geom2d_BsplineCurve with degree 1 with specified tolerance. //! points - points obtained from 3d curve. //! params - parameters corresponding points on 3d curves //! points2d - 2d points lies on line in parametric space //! theTol - tolerance used for compare initial points 3d and //! 3d points obtained from line lying in parameric space of surface Standard_EXPORT Handle(Geom2d_Curve) getLine (const TColgp_SequenceOfPnt& points, const TColStd_SequenceOfReal& params, TColgp_SequenceOfPnt2d& points2d, const Standard_Real theTol, Standard_Boolean& IsRecompute, Standard_Boolean &isFromCashe) const; Handle(ShapeAnalysis_Surface) mySurf; Standard_Real myPreci; Standard_Boolean myBuild; Standard_Integer myStatus; Standard_Integer myAdjustOverDegen; Standard_Integer myNbCashe; gp_Pnt myCashe3d[2]; gp_Pnt2d myCashe2d[2]; private: Standard_EXPORT Handle(Geom2d_Curve) ProjectAnalytic (const Handle(Geom_Curve)& c3d) const; Standard_EXPORT Standard_Boolean ApproxPCurve (const Standard_Integer nbrPnt, const Handle(Geom_Curve)& c3d, const Standard_Real TolFirst, const Standard_Real TolLast, TColgp_SequenceOfPnt& points, TColStd_SequenceOfReal& params, TColgp_SequenceOfPnt2d& points2d, Handle(Geom2d_Curve)& c2d); Standard_EXPORT void CorrectExtremity(const Handle(Geom_Curve)& theC3d, const TColStd_SequenceOfReal& theParams, TColgp_SequenceOfPnt2d& thePnt2d, const Standard_Boolean theIsFirstPoint, const gp_Pnt2d& thePointOnIsoLine, const Standard_Boolean theIsUiso); Standard_EXPORT void InsertAdditionalPointOrAdjust(Standard_Boolean& ToAdjust, const Standard_Integer theIndCoord, const Standard_Real Period, const Standard_Real TolOnPeriod, Standard_Real& CurCoord, const Standard_Real prevCoord, const Handle(Geom_Curve)& c3d, Standard_Integer& theIndex, TColgp_SequenceOfPnt& points, TColStd_SequenceOfReal& params, TColgp_SequenceOfPnt2d& pnt2d); Standard_EXPORT Handle(Geom2d_Curve) InterpolatePCurve (const Standard_Integer nbrPnt, Handle(TColgp_HArray1OfPnt2d)& points2d, Handle(TColStd_HArray1OfReal)& params, const Handle(Geom_Curve)& orig) const; Standard_EXPORT Handle(Geom2d_Curve) ApproximatePCurve (const Standard_Integer nbrPnt, Handle(TColgp_HArray1OfPnt2d)& points2d, Handle(TColStd_HArray1OfReal)& params, const Handle(Geom_Curve)& orig) const; Standard_EXPORT Handle(Geom_Curve) InterpolateCurve3d (const Standard_Integer nbrPnt, Handle(TColgp_HArray1OfPnt)& points, Handle(TColStd_HArray1OfReal)& params, const Handle(Geom_Curve)& orig) const; Standard_EXPORT void CheckPoints (Handle(TColgp_HArray1OfPnt)& points, Handle(TColStd_HArray1OfReal)& params, Standard_Real& preci) const; Standard_EXPORT void CheckPoints2d (Handle(TColgp_HArray1OfPnt2d)& points, Handle(TColStd_HArray1OfReal)& params, Standard_Real& preci) const; Standard_EXPORT Standard_Boolean IsAnIsoparametric (const Standard_Integer nbrPnt, const TColgp_SequenceOfPnt& points, const TColStd_SequenceOfReal& 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; }; #endif // _ShapeConstruct_ProjectCurveOnSurface_HeaderFile