// File: Extrema_ExtElC2d.cxx // Created: Tue Jan 4 11:42:51 1994 // Author: Christophe MARION // #include #include #include #include #include #include #include #include #include #include //============================================================================= Extrema_ExtElC2d::Extrema_ExtElC2d () { myDone = Standard_False; } //============================================================================= Extrema_ExtElC2d::Extrema_ExtElC2d (const gp_Lin2d& C1, const gp_Lin2d& C2, const Standard_Real) /*----------------------------------------------------------------------------- Fonction: Recherche de la distance minimale entre 2 droites. Methode: Soit D1 et D2, les 2 directions des droites C1 et C2. 2 cas sont consideres: 1- si Angle(D1,D2) < AngTol, les droites sont paralleles. La distance est la distance entre un point quelconque de C1 et la droite C2. 2- si Angle(D1,D2) > AngTol: Soit P = C1(u1) et P =C2(u2) le point intersection: -----------------------------------------------------------------------------*/ { myDone = Standard_False; myIsPar = Standard_False; myNbExt = 0; gp_Dir2d D1 = C1.Direction(); gp_Dir2d D2 = C2.Direction(); if (D1.IsParallel(D2, Precision::Angular())) { myIsPar = Standard_True; mySqDist[0] = C2.SquareDistance(C1.Location()); } else { myNbExt = 0; } myDone = Standard_True; } //============================================================================= Extrema_ExtElC2d::Extrema_ExtElC2d (const gp_Lin2d& C1, const gp_Circ2d& C2, const Standard_Real) /*----------------------------------------------------------------------------- Fonction: Recherche des distances extremales entre la droite C1 et le cercle C2. Methode: Soit P1=C1(u1) et P2=C2(u2) deux points solutions D la direction de la droite C1 T la tangente au point P2; Alors, ( P1P2.D = 0. (1) ( P1P2.T = 0. (2) -----------------------------------------------------------------------------*/ { myIsPar = Standard_False; myDone = Standard_False; myNbExt = 0; // Calcul de T1 dans le repere du cercle ... gp_Dir2d D = C1.Direction(); gp_Dir2d x2, y2; x2 = C2.XAxis().Direction(); y2 = C2.YAxis().Direction(); Standard_Real Dx = D.Dot(x2); Standard_Real Dy = D.Dot(y2); Standard_Real U1, teta[2]; gp_Pnt2d O1=C1.Location(); C2.Location(); gp_Pnt2d P1, P2; if (Abs(Dy) <= RealEpsilon()) { teta[0] = PI/2.0; } else teta[0] = ATan(-Dx/Dy); teta[1] = teta[0]+ PI; if (teta[0] < 0.0) teta[0] = teta[0] + 2.0*PI; P2 = ElCLib::Value(teta[0], C2); U1 = (gp_Vec2d(O1, P2)).Dot(D); P1 = ElCLib::Value(U1, C1); mySqDist[myNbExt] = P1.SquareDistance(P2); myPoint[myNbExt][0] = Extrema_POnCurv2d(U1,P1); myPoint[myNbExt][1] = Extrema_POnCurv2d(teta[0],P2); myNbExt++; P2 = ElCLib::Value(teta[1], C2); U1 = (gp_Vec2d(O1, P2)).Dot(D); P1 = ElCLib::Value(U1, C1); mySqDist[myNbExt] = P1.SquareDistance(P2); myPoint[myNbExt][0] = Extrema_POnCurv2d(U1,P1); myPoint[myNbExt][1] = Extrema_POnCurv2d(teta[1],P2); myNbExt++; myDone = Standard_True; } // ============================================================================= Extrema_ExtElC2d::Extrema_ExtElC2d (const gp_Lin2d& C1, const gp_Elips2d& C2) { myDone = Standard_True; myIsPar = Standard_False; myDone = Standard_False; myNbExt = 0; // Calcul de T1 dans le repere de l ellipse ... gp_Dir2d D = C1.Direction(); gp_Dir2d x2, y2; x2 = C2.XAxis().Direction(); y2 = C2.YAxis().Direction(); Standard_Real Dx = D.Dot(x2); Standard_Real Dy = D.Dot(y2); Standard_Real U1, teta[2], r1 = C2.MajorRadius(), r2 = C2.MinorRadius(); gp_Pnt2d O1=C1.Location(), P1, P2; if (Abs(Dy) <= RealEpsilon()) { teta[0] = PI/2.0; } else teta[0] = ATan(-Dx*r2/(Dy*r1)); teta[1] = teta[0] + PI; if (teta[0] < 0.0) teta[0] += 2.0*PI; P2 = ElCLib::Value(teta[0], C2); U1 = (gp_Vec2d(O1, P2)).Dot(D); P1 = ElCLib::Value(U1, C1); mySqDist[myNbExt] = P1.SquareDistance(P2); myPoint[myNbExt][0] = Extrema_POnCurv2d(U1,P1); myPoint[myNbExt][1] = Extrema_POnCurv2d(teta[0],P2); myNbExt++; P2 = ElCLib::Value(teta[1], C2); U1 = (gp_Vec2d(O1, P2)).Dot(D); P1 = ElCLib::Value(U1, C1); mySqDist[myNbExt] = P1.SquareDistance(P2); myPoint[myNbExt][0] = Extrema_POnCurv2d(U1,P1); myPoint[myNbExt][1] = Extrema_POnCurv2d(teta[1],P2); myNbExt++; myDone = Standard_True; } //============================================================================= Extrema_ExtElC2d::Extrema_ExtElC2d (const gp_Lin2d& C1, const gp_Hypr2d& C2) { myIsPar = Standard_False; myDone = Standard_False; myNbExt = 0; // Calcul de T1 dans le repere de la parabole ... gp_Dir2d D = C1.Direction(); gp_Dir2d x2, y2; x2 = C2.XAxis().Direction(); y2 = C2.YAxis().Direction(); Standard_Real Dx = D.Dot(x2); Standard_Real Dy = D.Dot(y2); Standard_Real U1, v2, U2=0, R = C2.MajorRadius(), r = C2.MinorRadius(); gp_Pnt2d P1, P2; if (Abs(Dy) < RealEpsilon()) { return;} if (Abs(R - r*Dx/Dy) < RealEpsilon()) return; v2 = (R + r*Dx/Dy)/(R - r*Dx/Dy); if (v2 > 0.0) U2 = Log(Sqrt(v2)); P2 = ElCLib::Value(U2, C2); U1 = (gp_Vec2d(C1.Location(), P2)).Dot(D); P1 = ElCLib::Value(U1, C1); mySqDist[myNbExt] = P1.SquareDistance(P2); myPoint[myNbExt][0] = Extrema_POnCurv2d(U1,P1); myPoint[myNbExt][1] = Extrema_POnCurv2d(U2,P2); myNbExt++; myDone = Standard_True; } //============================================================================ Extrema_ExtElC2d::Extrema_ExtElC2d (const gp_Lin2d& C1, const gp_Parab2d& C2) { myIsPar = Standard_False; myDone = Standard_False; myNbExt = 0; // Calcul de T1 dans le repere de la parabole ... gp_Dir2d D = C1.Direction(); gp_Dir2d x2, y2; x2 = C2.MirrorAxis().Direction(); y2 = C2.Axis().YAxis().Direction(); Standard_Real Dx = D.Dot(x2); Standard_Real Dy = D.Dot(y2); Standard_Real U1, U2, P = C2.Parameter(); gp_Pnt2d P1, P2; if (Abs(Dy) < RealEpsilon()) { return; } U2 = Dx*P/Dy; P2 = ElCLib::Value(U2, C2); U1 = (gp_Vec2d(C1.Location(), P2)).Dot(D); P1 = ElCLib::Value(U1, C1); mySqDist[myNbExt] = P1.SquareDistance(P2); myPoint[myNbExt][0] = Extrema_POnCurv2d(U1,P1); myPoint[myNbExt][1] = Extrema_POnCurv2d(U2,P2); myNbExt++; myDone = Standard_True; } //============================================================================ Extrema_ExtElC2d::Extrema_ExtElC2d (const gp_Circ2d& C1, const gp_Circ2d& C2) { myIsPar = Standard_False; myDone = Standard_False; myNbExt = 0; myDone = Standard_True; gp_Pnt2d O1 = C1.Location(); gp_Pnt2d O2 = C2.Location(); gp_Vec2d DO1O2 (O1, O2); if (DO1O2.Magnitude() < Precision::Confusion()) { myIsPar = Standard_True; return; } Standard_Integer NoSol, kk; Standard_Real U1, U2; Standard_Real r1 = C1.Radius(), r2 = C2.Radius(); Standard_Real Usol2[2], Usol1[2]; gp_Pnt2d P1[2], P2[2]; gp_Dir2d O1O2(DO1O2); P1[0] = O1.Translated(r1*O1O2); Usol1[0] = ElCLib::Parameter(C1, P1[0]); P1[1] = O1.Translated(-r1*O1O2); Usol1[1] = ElCLib::Parameter(C1, P1[1]); P2[0] = O2.Translated(r2*O1O2); Usol2[0] = ElCLib::Parameter(C2, P2[0]); P2[1] = O2.Translated(-r2*O1O2); Usol2[1] = ElCLib::Parameter(C2, P2[1]); for (NoSol = 0; NoSol <= 1; NoSol++) { U1 = Usol1[NoSol]; for (kk = 0; kk <= 1; kk++) { U2 = Usol2[kk]; mySqDist[myNbExt] = P2[kk].SquareDistance(P1[NoSol]); myPoint[myNbExt][0] = Extrema_POnCurv2d(U1, P1[NoSol]); myPoint[myNbExt][1] = Extrema_POnCurv2d(U2, P2[kk]); myNbExt++; } } } //=========================================================================== Extrema_ExtElC2d::Extrema_ExtElC2d (const gp_Circ2d& C1, const gp_Elips2d& C2) { myIsPar = Standard_False; myDone = Standard_False; myNbExt = 0; Standard_Integer i, j; Extrema_ExtPElC2d ExtElip(C1.Location(), C2, Precision::Confusion(), 0.0, 2.0*PI); if (ExtElip.IsDone()) { for (i = 1; i <= ExtElip.NbExt(); i++) { Extrema_ExtPElC2d ExtCirc(ExtElip.Point(i).Value(), C1, Precision::Confusion(), 0.0, 2.0*PI); if (ExtCirc.IsDone()) { for (j = 1; j <= ExtCirc.NbExt(); j++) { mySqDist[myNbExt] = ExtCirc.SquareDistance(j); myPoint[myNbExt][0] = ExtCirc.Point(j); myPoint[myNbExt][1] = ExtElip.Point(i); myNbExt++; } } myDone = Standard_True; } } } //============================================================================ Extrema_ExtElC2d::Extrema_ExtElC2d (const gp_Circ2d& C1, const gp_Hypr2d& C2) { myIsPar = Standard_False; myDone = Standard_False; myNbExt = 0; Standard_Integer i, j; Extrema_ExtPElC2d ExtHyp(C1.Location(), C2, Precision::Confusion(), RealFirst(), RealLast()); if (ExtHyp.IsDone()) { for (i = 1; i <= ExtHyp.NbExt(); i++) { Extrema_ExtPElC2d ExtCirc(ExtHyp.Point(i).Value(), C1, Precision::Confusion(), 0.0, 2.0*PI); if (ExtCirc.IsDone()) { for (j = 1; j <= ExtCirc.NbExt(); j++) { mySqDist[myNbExt] = ExtCirc.SquareDistance(j); myPoint[myNbExt][0] = ExtCirc.Point(j); myPoint[myNbExt][1] = ExtHyp.Point(i); myNbExt++; } } myDone = Standard_True; } } } //============================================================================ Extrema_ExtElC2d::Extrema_ExtElC2d (const gp_Circ2d& C1, const gp_Parab2d& C2) { myIsPar = Standard_False; myDone = Standard_False; myNbExt = 0; Standard_Integer i, j; Extrema_ExtPElC2d ExtParab(C1.Location(), C2, Precision::Confusion(), RealFirst(), RealLast()); if (ExtParab.IsDone()) { for (i = 1; i <= ExtParab.NbExt(); i++) { Extrema_ExtPElC2d ExtCirc(ExtParab.Point(i).Value(), C1, Precision::Confusion(), 0.0, 2.0*PI); if (ExtCirc.IsDone()) { for (j = 1; j <= ExtCirc.NbExt(); j++) { mySqDist[myNbExt] = ExtCirc.SquareDistance(j); myPoint[myNbExt][0] = ExtCirc.Point(j); myPoint[myNbExt][1] = ExtParab.Point(i); myNbExt++; } } myDone = Standard_True; } } } //============================================================================ Extrema_ExtElC2d::Extrema_ExtElC2d (const gp_Elips2d&, const gp_Elips2d&) { Standard_NotImplemented::Raise(); } //============================================================================ Extrema_ExtElC2d::Extrema_ExtElC2d (const gp_Elips2d&, const gp_Hypr2d&) { Standard_NotImplemented::Raise(); } //============================================================================ Extrema_ExtElC2d::Extrema_ExtElC2d (const gp_Elips2d&, const gp_Parab2d&) { Standard_NotImplemented::Raise(); } //============================================================================ Extrema_ExtElC2d::Extrema_ExtElC2d (const gp_Hypr2d&, const gp_Hypr2d&) { Standard_NotImplemented::Raise(); } //============================================================================ Extrema_ExtElC2d::Extrema_ExtElC2d (const gp_Hypr2d&, const gp_Parab2d&) { Standard_NotImplemented::Raise(); } //============================================================================ Extrema_ExtElC2d::Extrema_ExtElC2d (const gp_Parab2d&, const gp_Parab2d&) { Standard_NotImplemented::Raise(); } //============================================================================ Standard_Boolean Extrema_ExtElC2d::IsDone () const { return myDone; } //============================================================================ Standard_Boolean Extrema_ExtElC2d::IsParallel () const { if (!IsDone()) { StdFail_NotDone::Raise(); } return myIsPar; } //============================================================================ Standard_Integer Extrema_ExtElC2d::NbExt () const { if (IsParallel()) { StdFail_InfiniteSolutions::Raise(); } return myNbExt; } //============================================================================ Standard_Real Extrema_ExtElC2d::SquareDistance (const Standard_Integer N) const { if (!(N == 1 && myDone)) { if (N < 1 || N > NbExt()) { Standard_OutOfRange::Raise(); } } return mySqDist[N-1]; } //============================================================================ void Extrema_ExtElC2d::Points (const Standard_Integer N, Extrema_POnCurv2d& P1, Extrema_POnCurv2d& P2) const { if (N < 1 || N > NbExt()) { Standard_OutOfRange::Raise(); } P1 = myPoint[N-1][0]; P2 = myPoint[N-1][1]; } //============================================================================