0031668: Visualization - WebGL sample doesn't work on Emscripten 1.39
[occt.git] / 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
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237
238
239
240 #endif // _ShapeConstruct_ProjectCurveOnSurface_HeaderFile