1 // Created on: 1996-04-03 2 // Created by: Stagiaire Frederic CALOONE 3 // Copyright (c) 1996-1999 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 _GeomPlate_BuildPlateSurface_HeaderFile 18 #define _GeomPlate_BuildPlateSurface_HeaderFile 19 20 #include <Standard.hxx> 21 #include <Standard_DefineAlloc.hxx> 22 #include <Standard_Handle.hxx> 23 24 #include <GeomPlate_HSequenceOfCurveConstraint.hxx> 25 #include <GeomPlate_HArray1OfSequenceOfReal.hxx> 26 #include <GeomPlate_HSequenceOfPointConstraint.hxx> 27 #include <Plate_Plate.hxx> 28 #include <Standard_Boolean.hxx> 29 #include <TColStd_HArray1OfInteger.hxx> 30 #include <Standard_Integer.hxx> 31 #include <Standard_Real.hxx> 32 #include <Extrema_ExtPS.hxx> 33 #include <GeomPlate_HArray1OfHCurve.hxx> 34 #include <TColgp_SequenceOfXY.hxx> 35 #include <TColgp_SequenceOfXYZ.hxx> 36 #include <TColGeom2d_HArray1OfCurve.hxx> 37 #include <TColStd_HArray1OfReal.hxx> 38 class Geom_Surface; 39 class GeomPlate_Surface; 40 class GeomPlate_CurveConstraint; 41 class GeomPlate_PointConstraint; 42 class gp_Pnt2d; 43 class gp_Pnt; 44 class Geom2d_Curve; 45 46 47 //! This class provides an algorithm for constructing such a plate surface that 48 //! it conforms to given curve and/or point constraints. 49 //! The algorithm accepts or constructs an initial surface 50 //! and looks for a deformation of it satisfying the 51 //! constraints and minimizing energy input. 52 //! A BuildPlateSurface object provides a framework for: 53 //! - defining or setting constraints 54 //! - implementing the construction algorithm 55 //! - consulting the result. 56 class GeomPlate_BuildPlateSurface 57 { 58 public: 59 60 DEFINE_STANDARD_ALLOC 61 62 63 //! Constructor compatible with the old version 64 //! with this constructor the constraint are given in a Array of Curve on Surface 65 //! The array NbPoints contains the number of points for each constraint. 66 //! The Array Tang contains the order of constraint for each Constraint: The possible values for this 67 //! order has to be -1 , 0 , 1 , 2 . Order i means constraint Gi. 68 //! NbIter is the maximum number of iteration to optimise the number of points for resolution 69 //! Degree is the degree of resolution for Plate 70 //! Tol2d is the tolerance used to test if two points of different constraint are identical in the 71 //! parametric space of the initial surface 72 //! Tol3d is used to test if two identical points in the 2d space are identical in 3d space 73 //! TolAng is used to compare the angle between normal of two identical points in the 2d space 74 //! Raises ConstructionError; 75 Standard_EXPORT GeomPlate_BuildPlateSurface(const Handle(TColStd_HArray1OfInteger)& NPoints, const Handle(GeomPlate_HArray1OfHCurve)& TabCurve, const Handle(TColStd_HArray1OfInteger)& Tang, const Standard_Integer Degree, const Standard_Integer NbIter = 3, const Standard_Real Tol2d = 0.00001, const Standard_Real Tol3d = 0.0001, const Standard_Real TolAng = 0.01, const Standard_Real TolCurv = 0.1, const Standard_Boolean Anisotropie = Standard_False); 76 77 Standard_EXPORT GeomPlate_BuildPlateSurface(const Handle(Geom_Surface)& Surf, const Standard_Integer Degree = 3, const Standard_Integer NbPtsOnCur = 10, const Standard_Integer NbIter = 3, const Standard_Real Tol2d = 0.00001, const Standard_Real Tol3d = 0.0001, const Standard_Real TolAng = 0.01, const Standard_Real TolCurv = 0.1, const Standard_Boolean Anisotropie = Standard_False); 78 79 //! Initializes the BuildPlateSurface framework for 80 //! deforming plate surfaces using curve and point 81 //! constraints. You use the first constructor if you have 82 //! an initial surface to work with at construction time. If 83 //! not, you use the second. You can add one later by 84 //! using the method LoadInitSurface. If no initial 85 //! surface is loaded, one will automatically be computed. 86 //! The curve and point constraints will be defined by 87 //! using the method Add. 88 //! Before the call to the algorithm, the curve constraints 89 //! will be transformed into sequences of discrete points. 90 //! Each curve defined as a constraint will be given the 91 //! value of NbPtsOnCur as the average number of points on it. 92 //! Several arguments serve to improve performance of 93 //! the algorithm. NbIter, for example, expresses the 94 //! number of iterations allowed and is used to control the 95 //! duration of computation. To optimize resolution, 96 //! Degree will have the default value of 3. 97 //! The surface generated must respect several tolerance values: 98 //! - 2d tolerance given by Tol2d, with a default value of 0.00001 99 //! - 3d tolerance expressed by Tol3d, with a default value of 0.0001 100 //! - angular tolerance given by TolAng, with a default 101 //! value of 0.01, defining the greatest angle allowed 102 //! between the constraint and the target surface. 103 //! Exceptions 104 //! Standard_ConstructionError if NbIter is less than 1 or Degree is less than 3. 105 Standard_EXPORT GeomPlate_BuildPlateSurface(const Standard_Integer Degree = 3, const Standard_Integer NbPtsOnCur = 10, const Standard_Integer NbIter = 3, const Standard_Real Tol2d = 0.00001, const Standard_Real Tol3d = 0.0001, const Standard_Real TolAng = 0.01, const Standard_Real TolCurv = 0.1, const Standard_Boolean Anisotropie = Standard_False); 106 107 //! Resets all constraints 108 Standard_EXPORT void Init(); 109 110 //! Loads the initial Surface 111 Standard_EXPORT void LoadInitSurface (const Handle(Geom_Surface)& Surf); 112 113 //! Adds the linear constraint cont. 114 Standard_EXPORT void Add (const Handle(GeomPlate_CurveConstraint)& Cont); 115 116 Standard_EXPORT void SetNbBounds (const Standard_Integer NbBounds); 117 118 //! Adds the point constraint cont. 119 Standard_EXPORT void Add (const Handle(GeomPlate_PointConstraint)& Cont); 120 121 122 //! Calls the algorithm and computes the plate surface using 123 //! the loaded constraints. If no initial surface is given, the 124 //! algorithm automatically computes one. 125 //! Exceptions 126 //! Standard_RangeError if the value of the constraint is 127 //! null or if plate is not done. 128 Standard_EXPORT void Perform(const Message_ProgressRange& theProgress = Message_ProgressRange()); 129 130 //! returns the CurveConstraints of order order 131 Standard_EXPORT Handle(GeomPlate_CurveConstraint) CurveConstraint (const Standard_Integer order) const; 132 133 //! returns the PointConstraint of order order 134 Standard_EXPORT Handle(GeomPlate_PointConstraint) PointConstraint (const Standard_Integer order) const; 135 136 Standard_EXPORT void Disc2dContour (const Standard_Integer nbp, TColgp_SequenceOfXY& Seq2d); 137 138 Standard_EXPORT void Disc3dContour (const Standard_Integer nbp, const Standard_Integer iordre, TColgp_SequenceOfXYZ& Seq3d); 139 140 141 //! Tests whether computation of the plate has been completed. 142 Standard_EXPORT Standard_Boolean IsDone() const; 143 144 145 //! Returns the result of the computation. This surface can 146 //! then be used by GeomPlate_MakeApprox for 147 //! converting the resulting surface into a BSpline. 148 Standard_EXPORT Handle(GeomPlate_Surface) Surface() const; 149 150 //! Returns the initial surface 151 Standard_EXPORT Handle(Geom_Surface) SurfInit() const; 152 153 154 //! Allows you to ensure that the array of curves returned by 155 //! Curves2d has the correct orientation. Returns the 156 //! orientation of the curves in the array returned by 157 //! Curves2d. Computation changes the orientation of 158 //! these curves. Consequently, this method returns the 159 //! orientation prior to computation. 160 Standard_EXPORT Handle(TColStd_HArray1OfInteger) Sense() const; 161 162 163 //! Extracts the array of curves on the plate surface which 164 //! correspond to the curve constraints set in Add. 165 Standard_EXPORT Handle(TColGeom2d_HArray1OfCurve) Curves2d() const; 166 167 168 //! Returns the order of the curves in the array returned by 169 //! Curves2d. Computation changes this order. 170 //! Consequently, this method returns the order of the 171 //! curves prior to computation. 172 Standard_EXPORT Handle(TColStd_HArray1OfInteger) Order() const; 173 174 //! Returns the max distance between the result and the constraints 175 Standard_EXPORT Standard_Real G0Error() const; 176 177 //! Returns the max angle between the result and the constraints 178 Standard_EXPORT Standard_Real G1Error() const; 179 180 //! Returns the max difference of curvature between the result and the constraints 181 Standard_EXPORT Standard_Real G2Error() const; 182 183 //! Returns the max distance between the result and the constraint Index 184 Standard_EXPORT Standard_Real G0Error (const Standard_Integer Index); 185 186 //! Returns the max angle between the result and the constraint Index 187 Standard_EXPORT Standard_Real G1Error (const Standard_Integer Index); 188 189 //! Returns the max difference of curvature between the result and the constraint Index 190 Standard_EXPORT Standard_Real G2Error (const Standard_Integer Index); 191 192 193 194 195 protected: 196 197 198 199 200 201 private: 202 203 204 //! Evaluates the distance, the angle between normals, and the "courbure" 205 //! on middle points of constraints and corresponding points on the GeomPlate_Surface 206 //! the results are given for a curve c 207 Standard_EXPORT void EcartContraintesMil (const Standard_Integer c, Handle(TColStd_HArray1OfReal)& d, Handle(TColStd_HArray1OfReal)& an, Handle(TColStd_HArray1OfReal)& courb); 208 209 Standard_EXPORT gp_Pnt2d ProjectPoint (const gp_Pnt& P); 210 211 Standard_EXPORT Handle(Geom2d_Curve) ProjectCurve (const Handle(Adaptor3d_Curve)& Curv); 212 213 Standard_EXPORT Handle(Adaptor2d_Curve2d) ProjectedCurve (Handle(Adaptor3d_Curve)& Curv); 214 215 Standard_EXPORT void ComputeSurfInit(const Message_ProgressRange& theProgress); 216 217 Standard_EXPORT void Intersect (Handle(GeomPlate_HArray1OfSequenceOfReal)& PntInter, Handle(GeomPlate_HArray1OfSequenceOfReal)& PntG1G1); 218 219 Standard_EXPORT void Discretise (const Handle(GeomPlate_HArray1OfSequenceOfReal)& PntInter, const Handle(GeomPlate_HArray1OfSequenceOfReal)& PntG1G1); 220 221 Standard_EXPORT void LoadCurve (const Standard_Integer NbBoucle, const Standard_Integer OrderMax = 2); 222 223 Standard_EXPORT void LoadPoint (const Standard_Integer NbBoucle, const Standard_Integer OrderMax = 2); 224 225 Standard_EXPORT void CalculNbPtsInit(); 226 227 Standard_EXPORT Standard_Boolean VerifSurface (const Standard_Integer NbLoop); 228 229 Standard_EXPORT void VerifPoints (Standard_Real& dist, Standard_Real& ang, Standard_Real& curv) const; 230 231 Standard_EXPORT Standard_Boolean CourbeJointive (const Standard_Real tolerance); 232 233 Standard_EXPORT Standard_Real ComputeAnisotropie() const; 234 235 Standard_EXPORT Standard_Boolean IsOrderG1() const; 236 237 238 Handle(GeomPlate_HSequenceOfCurveConstraint) myLinCont; 239 Handle(GeomPlate_HArray1OfSequenceOfReal) myParCont; 240 Handle(GeomPlate_HArray1OfSequenceOfReal) myPlateCont; 241 Handle(GeomPlate_HSequenceOfPointConstraint) myPntCont; 242 Handle(Geom_Surface) mySurfInit; 243 Handle(Geom_Surface) myPlanarSurfInit; 244 Handle(GeomPlate_Surface) myGeomPlateSurface; 245 Plate_Plate myPlate; 246 Plate_Plate myPrevPlate; 247 Standard_Boolean myAnisotropie; 248 Handle(TColStd_HArray1OfInteger) mySense; 249 Standard_Integer myDegree; 250 Handle(TColStd_HArray1OfInteger) myInitOrder; 251 Standard_Real myG0Error; 252 Standard_Real myG1Error; 253 Standard_Real myG2Error; 254 Standard_Integer myNbPtsOnCur; 255 Standard_Boolean mySurfInitIsGive; 256 Standard_Integer myNbIter; 257 Extrema_ExtPS myProj; 258 Standard_Real myTol2d; 259 Standard_Real myTol3d; 260 Standard_Real myTolAng; 261 Standard_Real myTolU; 262 Standard_Real myTolV; 263 Standard_Integer myNbBounds; 264 Standard_Boolean myIsLinear; 265 Standard_Boolean myFree; 266 267 268 }; 269 270 271 272 273 274 275 276 #endif // _GeomPlate_BuildPlateSurface_HeaderFile 277