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0001 // Created on: 1996-08-09 0002 // Created by: Herve LOUESSARD 0003 // Copyright (c) 1996-1999 Matra Datavision 0004 // Copyright (c) 1999-2014 OPEN CASCADE SAS 0005 // 0006 // This file is part of Open CASCADE Technology software library. 0007 // 0008 // This library is free software; you can redistribute it and/or modify it under 0009 // the terms of the GNU Lesser General Public License version 2.1 as published 0010 // by the Free Software Foundation, with special exception defined in the file 0011 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT 0012 // distribution for complete text of the license and disclaimer of any warranty. 0013 // 0014 // Alternatively, this file may be used under the terms of Open CASCADE 0015 // commercial license or contractual agreement. 0016 0017 #ifndef _LocalAnalysis_CurveContinuity_HeaderFile 0018 #define _LocalAnalysis_CurveContinuity_HeaderFile 0019 0020 #include <Standard.hxx> 0021 #include <Standard_DefineAlloc.hxx> 0022 #include <Standard_Handle.hxx> 0023 0024 #include <GeomAbs_Shape.hxx> 0025 #include <LocalAnalysis_StatusErrorType.hxx> 0026 class Geom_Curve; 0027 #include <GeomLProp_CLProps.hxx> 0028 0029 //! This class gives tools to check local continuity C0 0030 //! C1 C2 G1 G2 between two points situated on two curves 0031 class LocalAnalysis_CurveContinuity 0032 { 0033 public: 0034 DEFINE_STANDARD_ALLOC 0035 0036 //! -u1 is the parameter of the point on Curv1 0037 //! -u2 is the parameter of the point on Curv2 0038 //! -Order is the required continuity: 0039 //! GeomAbs_C0 GeomAbs_C1 GeomAbs_C2 0040 //! GeomAbs_G1 GeomAbs_G2 0041 //! 0042 //! -EpsNul is used to detect a vector with null 0043 //! magnitude (in mm) 0044 //! 0045 //! -EpsC0 is used for C0 continuity to confuse two 0046 //! points (in mm) 0047 //! 0048 //! -EpsC1 is an angular tolerance in radians used 0049 //! for C1 continuity to compare the angle between 0050 //! the first derivatives 0051 //! 0052 //! -EpsC2 is an angular tolerance in radians used 0053 //! for C2 continuity to compare the angle between 0054 //! the second derivatives 0055 //! 0056 //! -EpsG1 is an angular tolerance in radians used 0057 //! for G1 continuity to compare the angle between 0058 //! the tangents 0059 //! 0060 //! -EpsG2 is an angular tolerance in radians used 0061 //! for G2 continuity to compare the angle between 0062 //! the normals 0063 //! 0064 //! - percent: percentage of curvature variation (unitless) 0065 //! used for G2 continuity 0066 //! 0067 //! - Maxlen is the maximum length of Curv1 or Curv2 in 0068 //! meters used to detect nul curvature (in mm) 0069 //! 0070 //! the constructor computes the quantities which are 0071 //! necessary to check the continuity in the following cases: 0072 //! 0073 //! case C0 0074 //! ------- 0075 //! - the distance between P1 and P2 with P1=Curv1 (u1) and 0076 //! P2=Curv2(u2) 0077 //! 0078 //! case C1 0079 //! ------- 0080 //! 0081 //! - the angle between the first derivatives 0082 //! dCurv1(u1) dCurv2(u2) 0083 //! -------- and --------- 0084 //! du du 0085 //! 0086 //! - the ratio between the magnitudes of the first 0087 //! derivatives 0088 //! 0089 //! the angle value is between 0 and PI/2 0090 //! 0091 //! case C2 0092 //! ------- 0093 //! - the angle between the second derivatives 0094 //! 2 2 0095 //! d Curv1(u1) d Curv2(u2) 0096 //! ---------- ---------- 0097 //! 2 2 0098 //! du du 0099 //! 0100 //! the angle value is between 0 and PI/2 0101 //! 0102 //! - the ratio between the magnitudes of the second 0103 //! derivatives 0104 //! 0105 //! case G1 0106 //! ------- 0107 //! the angle between the tangents at each point 0108 //! 0109 //! the angle value is between 0 and PI/2 0110 //! 0111 //! case G2 0112 //! ------- 0113 //! -the angle between the normals at each point 0114 //! 0115 //! the angle value is between 0 and PI/2 0116 //! 0117 //! - the relative variation of curvature: 0118 //! |curvat1-curvat2| 0119 //! ------------------ 0120 //! 1/2 0121 //! (curvat1*curvat2) 0122 //! 0123 //! where curvat1 is the curvature at the first point 0124 //! and curvat2 the curvature at the second point 0125 Standard_EXPORT LocalAnalysis_CurveContinuity(const occ::handle<Geom_Curve>& Curv1, 0126 const double u1, 0127 const occ::handle<Geom_Curve>& Curv2, 0128 const double u2, 0129 const GeomAbs_Shape Order, 0130 const double EpsNul = 0.001, 0131 const double EpsC0 = 0.001, 0132 const double EpsC1 = 0.001, 0133 const double EpsC2 = 0.001, 0134 const double EpsG1 = 0.001, 0135 const double EpsG2 = 0.001, 0136 const double Percent = 0.01, 0137 const double Maxlen = 10000); 0138 0139 Standard_EXPORT bool IsDone() const; 0140 0141 Standard_EXPORT LocalAnalysis_StatusErrorType StatusError() const; 0142 0143 Standard_EXPORT GeomAbs_Shape ContinuityStatus() const; 0144 0145 Standard_EXPORT double C0Value() const; 0146 0147 Standard_EXPORT double C1Angle() const; 0148 0149 Standard_EXPORT double C1Ratio() const; 0150 0151 Standard_EXPORT double C2Angle() const; 0152 0153 Standard_EXPORT double C2Ratio() const; 0154 0155 Standard_EXPORT double G1Angle() const; 0156 0157 Standard_EXPORT double G2Angle() const; 0158 0159 Standard_EXPORT double G2CurvatureVariation() const; 0160 0161 Standard_EXPORT bool IsC0() const; 0162 0163 Standard_EXPORT bool IsC1() const; 0164 0165 Standard_EXPORT bool IsC2() const; 0166 0167 Standard_EXPORT bool IsG1() const; 0168 0169 Standard_EXPORT bool IsG2() const; 0170 0171 private: 0172 Standard_EXPORT void CurvC0(GeomLProp_CLProps& Curv1, GeomLProp_CLProps& Curv2); 0173 0174 Standard_EXPORT void CurvC1(GeomLProp_CLProps& Curv1, GeomLProp_CLProps& Curv2); 0175 0176 Standard_EXPORT void CurvC2(GeomLProp_CLProps& Curv1, GeomLProp_CLProps& Curv2); 0177 0178 Standard_EXPORT void CurvG1(GeomLProp_CLProps& Curv1, GeomLProp_CLProps& Curv2); 0179 0180 Standard_EXPORT void CurvG2(GeomLProp_CLProps& Curv1, GeomLProp_CLProps& Curv2); 0181 0182 double myContC0; 0183 double myContC1; 0184 double myContC2; 0185 double myContG1; 0186 double myContG2; 0187 double myCourbC1; 0188 double myCourbC2; 0189 double myG2Variation; 0190 double myLambda1; 0191 double myLambda2; 0192 GeomAbs_Shape myTypeCont; 0193 double myepsnul; 0194 double myepsC0; 0195 double myepsC1; 0196 double myepsC2; 0197 double myepsG1; 0198 double myepsG2; 0199 double myMaxLon; 0200 double myperce; 0201 bool myIsDone; 0202 LocalAnalysis_StatusErrorType myErrorStatus; 0203 }; 0204 0205 #endif // _LocalAnalysis_CurveContinuity_HeaderFile
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