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79 lines
2.1 KiB
79 lines
2.1 KiB
2 years ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkParametricEnneper.cxx,v $
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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#include "vtkParametricEnneper.h"
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#include "vtkObjectFactory.h"
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#include "vtkMath.h"
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vtkCxxRevisionMacro(vtkParametricEnneper, "$Revision: 1.2 $");
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vtkStandardNewMacro(vtkParametricEnneper);
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//----------------------------------------------------------------------------
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vtkParametricEnneper::vtkParametricEnneper()
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{
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// Preset triangulation parameters
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this->MinimumU = -2.0;
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this->MinimumV = -2.0;
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this->MaximumU = 2.0;
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this->MaximumV = 2.0;
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this->JoinU = 0;
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this->JoinV = 0;
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this->TwistU = 0;
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this->TwistV = 0;
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this->ClockwiseOrdering = 1;
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this->DerivativesAvailable = 1;
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}
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//----------------------------------------------------------------------------
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vtkParametricEnneper::~vtkParametricEnneper()
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{
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}
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//----------------------------------------------------------------------------
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void vtkParametricEnneper::Evaluate(double uvw[3], double Pt[3], double Duvw[9])
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{
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double u = uvw[0];
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double v = uvw[1];
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double *Du = Duvw;
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double *Dv = Duvw + 3;
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// The point
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Pt[0] = u-u*u*u/3+u*v*v;
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Pt[1] = v-v*v*v/3+u*u*v;
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Pt[2] = u*u-v*v;
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//The derivatives are:
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Du[0] = 1-u*u+v*v;
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Dv[0] = 2*u*v;
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Du[1] = 2*u*v;
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Dv[1] = 1-v*v+u*u;
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Du[2] = 2*u;
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Dv[2] = -2*v;
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}
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//----------------------------------------------------------------------------
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double vtkParametricEnneper::EvaluateScalar(double *, double *, double *)
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{
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return 0;
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}
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//----------------------------------------------------------------------------
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void vtkParametricEnneper::PrintSelf(ostream& os, vtkIndent indent)
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{
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this->Superclass::PrintSelf(os,indent);
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}
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