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56 lines
1.7 KiB
56 lines
1.7 KiB
2 years ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkSphere.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 "vtkSphere.h"
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#include "vtkObjectFactory.h"
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vtkCxxRevisionMacro(vtkSphere, "$Revision: 1.26 $");
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vtkStandardNewMacro(vtkSphere);
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// Construct sphere with center at (0,0,0) and radius=0.5.
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vtkSphere::vtkSphere()
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{
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this->Radius = 0.5;
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this->Center[0] = 0.0;
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this->Center[1] = 0.0;
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this->Center[2] = 0.0;
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}
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// Evaluate sphere equation ((x-x0)^2 + (y-y0)^2 + (z-z0)^2) - R^2.
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double vtkSphere::EvaluateFunction(double x[3])
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{
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return ( ((x[0] - this->Center[0]) * (x[0] - this->Center[0]) +
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(x[1] - this->Center[1]) * (x[1] - this->Center[1]) +
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(x[2] - this->Center[2]) * (x[2] - this->Center[2])) -
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this->Radius*this->Radius );
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}
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// Evaluate sphere gradient.
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void vtkSphere::EvaluateGradient(double x[3], double n[3])
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{
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n[0] = 2.0 * (x[0] - this->Center[0]);
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n[1] = 2.0 * (x[1] - this->Center[1]);
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n[2] = 2.0 * (x[2] - this->Center[2]);
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}
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void vtkSphere::PrintSelf(ostream& os, vtkIndent indent)
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{
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this->Superclass::PrintSelf(os,indent);
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os << indent << "Radius: " << this->Radius << "\n";
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os << indent << "Center: (" << this->Center[0] << ", "
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<< this->Center[1] << ", " << this->Center[2] << ")\n";
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}
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