src/ShapeConstruct/ShapeConstruct_ProjectCurveOnSurface.hxx

   1 // Created on: 1998-07-14
   2 // Created by: data exchange team
   3 // Copyright (c) 1998-1999 Matra Datavision
   4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
   5 //
   6 // This file is part of Open CASCADE Technology software library.
   7 //
   8 // This library is free software; you can redistribute it and/or modify it under
   9 // the terms of the GNU Lesser General Public License version 2.1 as published
  10 // by the Free Software Foundation, with special exception defined in the file
  11 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
  12 // distribution for complete text of the license and disclaimer of any warranty.
  13 //
  14 // Alternatively, this file may be used under the terms of Open CASCADE
  15 // commercial license or contractual agreement.
  16
  17 #ifndef _ShapeConstruct_ProjectCurveOnSurface_HeaderFile
  18 #define _ShapeConstruct_ProjectCurveOnSurface_HeaderFile
  19
  20 #include <Standard.hxx>
  21 #include <Standard_Type.hxx>
  22
  23 #include <Standard_Real.hxx>
  24 #include <Standard_Boolean.hxx>
  25 #include <Standard_Integer.hxx>
  26 #include <gp_Pnt.hxx>
  27 #include <gp_Pnt2d.hxx>
  28 #include <Standard_Transient.hxx>
  29 #include <ShapeExtend_Status.hxx>
  30 #include <GeomAbs_Shape.hxx>
  31 #include <TColStd_Array1OfReal.hxx>
  32 #include <TColgp_HArray1OfPnt2d.hxx>
  33 #include <TColgp_HArray1OfPnt.hxx>
  34 #include <TColgp_SequenceOfPnt.hxx>
  35 #include <TColgp_SequenceOfPnt2d.hxx>
  36 #include <TColStd_SequenceOfReal.hxx>
  37 class ShapeAnalysis_Surface;
  38 class Geom_Surface;
  39 class Geom_Curve;
  40 class Geom2d_Curve;
  41
  42 // resolve name collisions with X11 headers
  43 #ifdef Status
  44   #undef Status
  45 #endif
  46
  47 class ShapeConstruct_ProjectCurveOnSurface;
  48 DEFINE_STANDARD_HANDLE(ShapeConstruct_ProjectCurveOnSurface, Standard_Transient)
  49
  50 //! This tool provides a method for computing pcurve by projecting
  51 //! 3d curve onto a surface.
  52 //! Projection is done by 23 or more points (this number is changed
  53 //! for B-Splines according to the following rule:
  54 //! the total number of the points is not less than number of spans *
  55 //! (degree + 1);
  56 //! it is increased recursively starting with 23 and is added with 22
  57 //! until the condition is fulfilled).
  58 //! Isoparametric cases (if curve corresponds to U=const or V=const on
  59 //! the surface) are recognized with the given precision.
  60 class ShapeConstruct_ProjectCurveOnSurface : public Standard_Transient
  61 {
  62
  63 public:
  64
  65
  66   //! Empty constructor.
  67   Standard_EXPORT ShapeConstruct_ProjectCurveOnSurface();
  68
  69   //! Initializes the object with all necessary parameters,
  70   //! i.e. surface and precision
  71   Standard_EXPORT virtual void Init (const Handle(Geom_Surface)& surf, const Standard_Real preci);
  72
  73   //! Initializes the object with all necessary parameters,
  74   //! i.e. surface and precision
  75   Standard_EXPORT virtual void Init (const Handle(ShapeAnalysis_Surface)& surf, const Standard_Real preci);
  76
  77   //! Loads a surface (in the form of Geom_Surface) to project on
  78   Standard_EXPORT void SetSurface (const Handle(Geom_Surface)& surf);
  79
  80   //! Loads a surface (in the form of ShapeAnalysis_Surface) to project on
  81   Standard_EXPORT void SetSurface (const Handle(ShapeAnalysis_Surface)& surf);
  82
  83   //! Sets value for current precision
  84   Standard_EXPORT void SetPrecision (const Standard_Real preci);
  85
  86   //! Returns (modifiable) the build-curve-3d mode, by default False
  87   //! If True, if the projected curve has been recomputed by
  88   //! interpolation, the 3d curve is also rebuild by interpolation
  89   Standard_EXPORT Standard_Boolean& BuildCurveMode();
  90
  91   //! Returns (modifiable) the flag specifying to which side of
  92   //! parametrical space adjust part of pcurve which lies on seam.
  93   //! This is required in very rare case when 3d curve which is
  94   //! to be projected goes partly along the seam on the closed
  95   //! surface with singularity (e.g. sphere), goes through the
  96   //! degenerated point and paerly lies on internal area of surface.
  97   //!
  98   //! If this flag is True, the seam part of such curve will be
  99   //! adjusted to the left side of parametric space (on sphere U=0),
 100   //! else to the right side (on sphere U=2*PI)
 101   //! Default value is True
 102   Standard_EXPORT Standard_Integer& AdjustOverDegenMode();
 103
 104   //! Returns the status of last Peform
 105   Standard_EXPORT Standard_Boolean Status (const ShapeExtend_Status theStatus) const;
 106
 107   //! Computes the projection of 3d curve onto a surface using the
 108   //! specialized algorithm. Returns False if projector fails,
 109   //! otherwise, if pcurve computed successfully, returns True.
 110   //! The output curve 2D is guaranteed to be same-parameter
 111   //! with input curve 3D on the interval [First, Last]. If the output curve
 112   //! lies on a direct line the infinite line is returned, in the case
 113   //! same-parameter condition is satisfied.
 114   //! TolFirst and TolLast are the tolerances at the ends of input curve 3D.
 115   Standard_EXPORT virtual Standard_Boolean Perform (Handle(Geom_Curve)& c3d,
 116                                                     const Standard_Real First,
 117                                                     const Standard_Real Last,
 118                                                     Handle(Geom2d_Curve)& c2d,
 119                                                     const Standard_Real TolFirst = -1,
 120                                                     const Standard_Real TolLast  = -1);
 121
 122   //! Computes the projection of 3d curve onto a surface using the
 123   //! standard algorithm from ProjLib. Returns False if standard
 124   //! projector fails or raises an exception or cuts the curve by
 125   //! parametrical bounds of the surface. Else, if pcurve computed
 126   //! successfully, returns True.
 127   //! The continuity, maxdeg and nbinterval are parameters of call
 128   //! to Approx_CurveOnSurface. If nbinterval is equal to -1
 129   //! (default), this value is computed depending on source 3d curve
 130   //! and surface.
 131   Standard_EXPORT Standard_Boolean PerformByProjLib (Handle(Geom_Curve)& c3d,
 132                                                      const Standard_Real First,
 133                                                      const Standard_Real Last,
 134                                                      Handle(Geom2d_Curve)& c2d,
 135                                                      const GeomAbs_Shape continuity = GeomAbs_C1,
 136                                                      const Standard_Integer maxdeg = 12,
 137                                                      const Standard_Integer nbinterval = -1);
 138
 139
 140
 141   DEFINE_STANDARD_RTTIEXT(ShapeConstruct_ProjectCurveOnSurface,Standard_Transient)
 142
 143 protected:
 144
 145
 146   //! Try to approximate 3D curve by Geom2d_Line
 147   //! or Geom2d_BsplineCurve with degree 1 with specified tolerance.
 148   //! points - points obtained from 3d curve.
 149   //! params - parameters corresponding points on 3d curves
 150   //! points2d - 2d points lies on line in parametric space
 151   //! theTol - tolerance used for compare initial points 3d and
 152   //! 3d points obtained from line lying in parameric space of surface
 153   Standard_EXPORT Handle(Geom2d_Curve) getLine (const TColgp_SequenceOfPnt& points,
 154                                                 const TColStd_SequenceOfReal& params,
 155                                                 TColgp_SequenceOfPnt2d& points2d,
 156                                                 const Standard_Real theTol,
 157                                                 Standard_Boolean& IsRecompute,
 158                                                 Standard_Boolean &isFromCashe) const;
 159
 160   Handle(ShapeAnalysis_Surface) mySurf;
 161   Standard_Real myPreci;
 162   Standard_Boolean myBuild;
 163   Standard_Integer myStatus;
 164   Standard_Integer myAdjustOverDegen;
 165   Standard_Integer myNbCashe;
 166   gp_Pnt myCashe3d[2];
 167   gp_Pnt2d myCashe2d[2];
 168
 169
 170 private:
 171
 172
 173   Standard_EXPORT Handle(Geom2d_Curve) ProjectAnalytic (const Handle(Geom_Curve)& c3d) const;
 174
 175   Standard_EXPORT Standard_Boolean ApproxPCurve (const Standard_Integer nbrPnt,
 176                                                  const Handle(Geom_Curve)& c3d,
 177                                                  const Standard_Real TolFirst,
 178                                                  const Standard_Real TolLast,
 179                                                  TColgp_SequenceOfPnt& points,
 180                                                  TColStd_SequenceOfReal& params,
 181                                                  TColgp_SequenceOfPnt2d& points2d,
 182                                                  Handle(Geom2d_Curve)& c2d);
 183
 184   Standard_EXPORT void CorrectExtremity(const Handle(Geom_Curve)& theC3d,
 185                                         const TColStd_SequenceOfReal& theParams,
 186                                         TColgp_SequenceOfPnt2d& thePnt2d,
 187                                         const Standard_Boolean theIsFirstPoint,
 188                                         const gp_Pnt2d& thePointOnIsoLine,
 189                                         const Standard_Boolean theIsUiso);
 190
 191   Standard_EXPORT void InsertAdditionalPointOrAdjust(Standard_Boolean& ToAdjust,
 192                                                      const Standard_Integer theIndCoord,
 193                                                      const Standard_Real Period,
 194                                                      const Standard_Real TolOnPeriod,
 195                                                      Standard_Real& CurCoord,
 196                                                      const Standard_Real prevCoord,
 197                                                      const Handle(Geom_Curve)& c3d,
 198                                                      Standard_Integer& theIndex,
 199                                                      TColgp_SequenceOfPnt& points,
 200                                                      TColStd_SequenceOfReal& params,
 201                                                      TColgp_SequenceOfPnt2d& pnt2d);
 202
 203   Standard_EXPORT Handle(Geom2d_Curve) InterpolatePCurve (const Standard_Integer nbrPnt,
 204                                                           Handle(TColgp_HArray1OfPnt2d)& points2d,
 205                                                           Handle(TColStd_HArray1OfReal)& params,
 206                                                           const Handle(Geom_Curve)& orig) const;
 207
 208   Standard_EXPORT Handle(Geom2d_Curve) ApproximatePCurve (const Standard_Integer nbrPnt, Handle(TColgp_HArray1OfPnt2d)& points2d, Handle(TColStd_HArray1OfReal)& params, const Handle(Geom_Curve)& orig) const;
 209
 210   Standard_EXPORT Handle(Geom_Curve) InterpolateCurve3d (const Standard_Integer nbrPnt, Handle(TColgp_HArray1OfPnt)& points, Handle(TColStd_HArray1OfReal)& params, const Handle(Geom_Curve)& orig) const;
 211
 212   Standard_EXPORT void CheckPoints (Handle(TColgp_HArray1OfPnt)& points, Handle(TColStd_HArray1OfReal)& params, Standard_Real& preci) const;
 213
 214   Standard_EXPORT void CheckPoints2d (Handle(TColgp_HArray1OfPnt2d)& points, Handle(TColStd_HArray1OfReal)& params, Standard_Real& preci) const;
 215
 216   Standard_EXPORT Standard_Boolean IsAnIsoparametric (const Standard_Integer nbrPnt,
 217                                                       const TColgp_SequenceOfPnt& points,
 218                                                       const TColStd_SequenceOfReal& params,
 219                                                       Standard_Boolean& isoTypeU,
 220                                                       Standard_Boolean& p1OnIso,
 221                                                       gp_Pnt2d& valueP1,
 222                                                       Standard_Boolean& p2OnIso,
 223                                                       gp_Pnt2d& valueP2,
 224                                                       Standard_Boolean& isoPar2d3d,
 225                                                       Handle(Geom_Curve)& cIso,
 226                                                       Standard_Real& t1,
 227                                                       Standard_Real& t2,
 228                                                       TColStd_Array1OfReal& pout) const;
 229
 230
 231
 232 };
 233
 234
 235
 236
 237
 238
 239
 240 #endif // _ShapeConstruct_ProjectCurveOnSurface_HeaderFile