// Created on: 1996-08-09 // Created by: Herve LOUESSARD // Copyright (c) 1996-1999 Matra Datavision // Copyright (c) 1999-2014 OPEN CASCADE SAS // // This file is part of Open CASCADE Technology software library. // // This library is free software; you can redistribute it and/or modify it under // the terms of the GNU Lesser General Public License version 2.1 as published // by the Free Software Foundation, with special exception defined in the file // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT // distribution for complete text of the license and disclaimer of any warranty. // // Alternatively, this file may be used under the terms of Open CASCADE // commercial license or contractual agreement. #ifndef _LocalAnalysis_CurveContinuity_HeaderFile #define _LocalAnalysis_CurveContinuity_HeaderFile #include #include #include #include #include class Geom_Curve; class GeomLProp_CLProps; //! This class gives tools to check local continuity C0 //! C1 C2 G1 G2 between two points situated on two curves class LocalAnalysis_CurveContinuity { public: DEFINE_STANDARD_ALLOC //! -u1 is the parameter of the point on Curv1 //! -u2 is the parameter of the point on Curv2 //! -Order is the required continuity: //! GeomAbs_C0 GeomAbs_C1 GeomAbs_C2 //! GeomAbs_G1 GeomAbs_G2 //! //! -EpsNul is used to detect a a vector with nul //! magnitude (in mm) //! //! -EpsC0 is used for C0 continuity to confuse two //! points (in mm) //! //! -EpsC1 is an angular tolerance in radians used //! for C1 continuity to compare the angle between //! the first derivatives //! //! -EpsC2 is an angular tolerance in radians used //! for C2 continuity to compare the angle between //! the second derivatives //! //! -EpsG1 is an angular tolerance in radians used //! for G1 continuity to compare the angle between //! the tangents //! //! -EpsG2 is an angular tolerance in radians used //! for G2 continuity to compare the angle between //! the normals //! //! - percent : percentage of curvature variation (unitless) //! used for G2 continuity //! //! - Maxlen is the maximum length of Curv1 or Curv2 in //! meters used to detect nul curvature (in mm) //! //! the constructor computes the quantities which are //! necessary to check the continuity in the following cases: //! //! case C0 //! -------- //! - the distance between P1 and P2 with P1=Curv1 (u1) and //! P2=Curv2(u2) //! //! case C1 //! ------- //! //! - the angle between the first derivatives //! dCurv1(u1) dCurv2(u2) //! -------- and --------- //! du du //! //! - the ratio between the magnitudes of the first //! derivatives //! //! the angle value is between 0 and PI/2 //! //! case C2 //! ------- //! - the angle between the second derivatives //! 2 2 //! d Curv1(u1) d Curv2(u2) //! ---------- ---------- //! 2 2 //! du du //! //! the angle value is between 0 and PI/2 //! //! - the ratio between the magnitudes of the second //! derivatives //! //! case G1 //! ------- //! the angle between the tangents at each point //! //! the angle value is between 0 and PI/2 //! //! case G2 //! ------- //! -the angle between the normals at each point //! //! the angle value is between 0 and PI/2 //! //! - the relative variation of curvature: //! |curvat1-curvat2| //! ------------------ //! 1/2 //! (curvat1*curvat2) //! //! where curvat1 is the curvature at the first point //! and curvat2 the curvature at the second point Standard_EXPORT LocalAnalysis_CurveContinuity(const Handle(Geom_Curve)& Curv1, const Standard_Real u1, const Handle(Geom_Curve)& Curv2, const Standard_Real u2, const GeomAbs_Shape Order, const Standard_Real EpsNul = 0.001, const Standard_Real EpsC0 = 0.001, const Standard_Real EpsC1 = 0.001, const Standard_Real EpsC2 = 0.001, const Standard_Real EpsG1 = 0.001, const Standard_Real EpsG2 = 0.001, const Standard_Real Percent = 0.01, const Standard_Real Maxlen = 10000); Standard_EXPORT Standard_Boolean IsDone() const; Standard_EXPORT LocalAnalysis_StatusErrorType StatusError() const; Standard_EXPORT GeomAbs_Shape ContinuityStatus() const; Standard_EXPORT Standard_Real C0Value() const; Standard_EXPORT Standard_Real C1Angle() const; Standard_EXPORT Standard_Real C1Ratio() const; Standard_EXPORT Standard_Real C2Angle() const; Standard_EXPORT Standard_Real C2Ratio() const; Standard_EXPORT Standard_Real G1Angle() const; Standard_EXPORT Standard_Real G2Angle() const; Standard_EXPORT Standard_Real G2CurvatureVariation() const; Standard_EXPORT Standard_Boolean IsC0() const; Standard_EXPORT Standard_Boolean IsC1() const; Standard_EXPORT Standard_Boolean IsC2() const; Standard_EXPORT Standard_Boolean IsG1() const; Standard_EXPORT Standard_Boolean IsG2() const; protected: private: Standard_EXPORT void CurvC0 (GeomLProp_CLProps& Curv1, GeomLProp_CLProps& Curv2); Standard_EXPORT void CurvC1 (GeomLProp_CLProps& Curv1, GeomLProp_CLProps& Curv2); Standard_EXPORT void CurvC2 (GeomLProp_CLProps& Curv1, GeomLProp_CLProps& Curv2); Standard_EXPORT void CurvG1 (GeomLProp_CLProps& Curv1, GeomLProp_CLProps& Curv2); Standard_EXPORT void CurvG2 (GeomLProp_CLProps& Curv1, GeomLProp_CLProps& Curv2); Standard_Real myContC0; Standard_Real myContC1; Standard_Real myContC2; Standard_Real myContG1; Standard_Real myContG2; Standard_Real myCourbC1; Standard_Real myCourbC2; Standard_Real myG2Variation; Standard_Real myLambda1; Standard_Real myLambda2; GeomAbs_Shape myTypeCont; Standard_Real myepsnul; Standard_Real myepsC0; Standard_Real myepsC1; Standard_Real myepsC2; Standard_Real myepsG1; Standard_Real myepsG2; Standard_Real myMaxLon; Standard_Real myperce; Standard_Boolean myIsDone; LocalAnalysis_StatusErrorType myErrorStatus; }; #endif // _LocalAnalysis_CurveContinuity_HeaderFile