1 // Created on: 1991-02-27 2 // Created by: Jean Claude Vauthier 3 // Copyright (c) 1991-1999 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 _CPnts_UniformDeflection_HeaderFile 18 #define _CPnts_UniformDeflection_HeaderFile 19 20 #include <Standard.hxx> 21 #include <Standard_DefineAlloc.hxx> 22 #include <Standard_Handle.hxx> 23 24 #include <Standard_Boolean.hxx> 25 #include <Standard_Address.hxx> 26 #include <Standard_Real.hxx> 27 #include <Standard_Integer.hxx> 28 #include <gp_Pnt.hxx> 29 class Adaptor3d_Curve; 30 class Adaptor2d_Curve2d; 31 32 33 //! This class defines an algorithm to create a set of points 34 //! (with a given chordal deviation) at the 35 //! positions of constant deflection of a given parametrized curve or a trimmed 36 //! circle. 37 //! The continuity of the curve must be at least C2. 38 //! 39 //! the usage of the is the following. 40 //! 41 //! class myUniformDFeflection instantiates 42 //! UniformDeflection(Curve, Tool); 43 //! 44 //! Curve C; // Curve inherits from Curve or Curve2d from Adaptor2d 45 //! myUniformDeflection Iter1; 46 //! DefPntOfmyUniformDeflection P; 47 //! 48 //! for(Iter1.Initialize(C, Deflection, EPSILON, True); 49 //! Iter1.More(); 50 //! Iter1.Next()) { 51 //! P = Iter1.Value(); 52 //! ... make something with P 53 //! } 54 //! if(!Iter1.IsAllDone()) { 55 //! ... something wrong happened 56 //! } 57 class CPnts_UniformDeflection 58 { 59 public: 60 61 DEFINE_STANDARD_ALLOC 62 63 64 //! creation of a indefinite UniformDeflection 65 Standard_EXPORT CPnts_UniformDeflection(); 66 67 //! Computes a uniform deflection distribution of points 68 //! on the curve <C>. 69 //! <Deflection> defines the constant deflection value. 70 //! The algorithm computes the number of points and the points. 71 //! The curve <C> must be at least C2 else the computation can fail. 72 //! If just some parts of the curve is C2 it is better to give the 73 //! parameters bounds and to use the below constructor . 74 //! if <WithControl> is True, the algorithm controls the estimate 75 //! deflection 76 //! when the curve is singular at the point P(u),the algorithm 77 //! computes the next point as 78 //! P(u + Max(CurrentStep,Abs(LastParameter-FirstParameter))) 79 //! if the singularity is at the first point ,the next point 80 //! calculated is the P(LastParameter) 81 Standard_EXPORT CPnts_UniformDeflection(const Adaptor3d_Curve& C, const Standard_Real Deflection, const Standard_Real Resolution, const Standard_Boolean WithControl); 82 83 //! As above with 2d curve 84 Standard_EXPORT CPnts_UniformDeflection(const Adaptor2d_Curve2d& C, const Standard_Real Deflection, const Standard_Real Resolution, const Standard_Boolean WithControl); 85 86 87 //! Computes an uniform deflection distribution of points on a part of 88 //! the curve <C>. Deflection defines the step between the points. 89 //! <U1> and <U2> define the distribution span. 90 //! <U1> and <U2> must be in the parametric range of the curve. 91 Standard_EXPORT CPnts_UniformDeflection(const Adaptor3d_Curve& C, const Standard_Real Deflection, const Standard_Real U1, const Standard_Real U2, const Standard_Real Resolution, const Standard_Boolean WithControl); 92 93 //! As above with 2d curve 94 Standard_EXPORT CPnts_UniformDeflection(const Adaptor2d_Curve2d& C, const Standard_Real Deflection, const Standard_Real U1, const Standard_Real U2, const Standard_Real Resolution, const Standard_Boolean WithControl); 95 96 //! Initialize the algorithms with <C>, <Deflection>, <UStep>, 97 //! <Resolution> and <WithControl> 98 Standard_EXPORT void Initialize (const Adaptor3d_Curve& C, const Standard_Real Deflection, const Standard_Real Resolution, const Standard_Boolean WithControl); 99 100 //! Initialize the algorithms with <C>, <Deflection>, <UStep>, 101 //! <Resolution> and <WithControl> 102 Standard_EXPORT void Initialize (const Adaptor2d_Curve2d& C, const Standard_Real Deflection, const Standard_Real Resolution, const Standard_Boolean WithControl); 103 104 //! Initialize the algorithms with <C>, <Deflection>, <UStep>, 105 //! <U1>, <U2> and <WithControl> 106 Standard_EXPORT void Initialize (const Adaptor3d_Curve& C, const Standard_Real Deflection, const Standard_Real U1, const Standard_Real U2, const Standard_Real Resolution, const Standard_Boolean WithControl); 107 108 //! Initialize the algorithms with <C>, <Deflection>, <UStep>, 109 //! <U1>, <U2> and <WithControl> 110 Standard_EXPORT void Initialize (const Adaptor2d_Curve2d& C, const Standard_Real Deflection, const Standard_Real U1, const Standard_Real U2, const Standard_Real Resolution, const Standard_Boolean WithControl); 111 112 //! To know if all the calculus were done successfully 113 //! (ie all the points have been computed). The calculus can fail if 114 //! the Curve is not C1 in the considered domain. 115 //! Returns True if the calculus was successful. 116 Standard_Boolean IsAllDone() const; 117 118 //! go to the next Point. 119 void Next(); 120 121 //! returns True if it exists a next Point. 122 Standard_EXPORT Standard_Boolean More(); 123 124 //! return the computed parameter 125 Standard_Real Value() const; 126 127 //! return the computed parameter 128 gp_Pnt Point() const; 129 130 131 132 133 protected: 134 135 136 137 138 139 private: 140 141 142 //! algorithm 143 Standard_EXPORT void Perform(); 144 145 146 Standard_Boolean myDone; 147 Standard_Boolean my3d; 148 Standard_Address myCurve; 149 Standard_Boolean myFinish; 150 Standard_Real myTolCur; 151 Standard_Boolean myControl; 152 Standard_Integer myIPoint; 153 Standard_Integer myNbPoints; 154 Standard_Real myParams[3]; 155 gp_Pnt myPoints[3]; 156 Standard_Real myDwmax; 157 Standard_Real myDeflection; 158 Standard_Real myFirstParam; 159 Standard_Real myLastParam; 160 Standard_Real myDu; 161 162 163 }; 164 165 166 #include <CPnts_UniformDeflection.lxx> 167 168 169 170 171 172 #endif // _CPnts_UniformDeflection_HeaderFile 173