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96 lines
2.7 KiB
96 lines
2.7 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkParametricEllipsoid.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 "vtkParametricEllipsoid.h"
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#include "vtkObjectFactory.h"
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#include "vtkMath.h"
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#include <math.h>
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vtkCxxRevisionMacro(vtkParametricEllipsoid, "$Revision: 1.2 $");
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vtkStandardNewMacro(vtkParametricEllipsoid);
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//----------------------------------------------------------------------------
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vtkParametricEllipsoid::vtkParametricEllipsoid() :
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XRadius(1)
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, YRadius(1)
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, ZRadius(1)
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{
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// Preset triangulation parameters
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this->MinimumU = 0;
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this->MinimumV = 0;
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this->MaximumU = 2.0 * vtkMath::Pi();
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this->MaximumV = vtkMath::Pi();
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this->JoinU = 1;
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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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vtkParametricEllipsoid::~vtkParametricEllipsoid()
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{
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}
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//----------------------------------------------------------------------------
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void vtkParametricEllipsoid::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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for ( int i = 0; i < 3; ++i)
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{
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Pt[i] = Du[i] = Dv[i] = 0;
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}
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double cu = cos(u);
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double su = sin(u);
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double cv = cos(v);
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double sv = sin(v);
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// The point
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Pt[0] = this->XRadius*sv*cu;
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Pt[1] = this->YRadius*sv*su;
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Pt[2] = this->ZRadius*cv;
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//The derivatives are:
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Du[0] = -this->XRadius*sv*su;
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Du[1] = this->YRadius*sv*cu;
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Du[2] = 0;
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Dv[0] = this->XRadius*cv*cu;
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Dv[1] = this->YRadius*cv*su;
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Dv[2] = -this->ZRadius*sv;
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}
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//----------------------------------------------------------------------------
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double vtkParametricEllipsoid::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 vtkParametricEllipsoid::PrintSelf(ostream& os, vtkIndent indent)
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{
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this->Superclass::PrintSelf(os,indent);
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os << indent << "X scale factor: " << this->XRadius << "\n";
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os << indent << "Y scale factor: " << this->YRadius << "\n";
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os << indent << "Z scale factor: " << this->ZRadius << "\n";
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}
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