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66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
// Copyright (c) 1995-1999 Matra Datavision
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// Copyright (c) 1999-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#include <IntSurf_QuadricTool.ixx>
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#include <gp_Sphere.hxx>
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#include <gp_Cylinder.hxx>
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void IntSurf_QuadricTool::ValueAndGradient (const IntSurf_Quadric& Quad,
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const Standard_Real X,
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const Standard_Real Y,
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const Standard_Real Z,
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Standard_Real& Val,
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gp_Vec& Grad,
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gp_Vec& D1U,
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gp_Vec& D1V)
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{
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gp_Pnt thePoint(X,Y,Z);
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Quad.ValAndGrad(thePoint, Val, Grad);
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Standard_Real U, V;
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Quad.Parameters(thePoint, U, V);
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Quad.D1(U, V, thePoint, D1U, D1V);
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}
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void IntSurf_QuadricTool::D2 (const IntSurf_Quadric& Quad,
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const gp_Pnt& aPoint,
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gp_Vec& D1U,
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gp_Vec& D1V,
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gp_Vec& D2U,
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gp_Vec& D2V,
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gp_Vec& D2UV)
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{
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Standard_Real U, V;
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Quad.Parameters(aPoint, U, V);
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gp_Pnt thePoint;
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Quad.D1(U, V, thePoint, D1U, D1V);
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D2U = Quad.DN(U, V, 2, 0);
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D2V = Quad.DN(U, V, 0, 2);
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D2UV = Quad.DN(U, V, 1, 1);
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}
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Standard_Real IntSurf_QuadricTool::Tolerance (const IntSurf_Quadric& Q) {
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switch (Q.TypeQuadric()) {
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case GeomAbs_Sphere:
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return 2.e-6*Q.Sphere().Radius();
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case GeomAbs_Cylinder:
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return 2.e-6*Q.Cylinder().Radius();
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default:
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break;
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}
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return(1e-6);
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}
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