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49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkCone.cxx
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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 "vtkCone.h"
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#include "vtkMath.h"
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#include "vtkObjectFactory.h"
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vtkStandardNewMacro(vtkCone);
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// Construct cone with angle of 45 degrees.
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vtkCone::vtkCone()
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{
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this->Angle = 45.0;
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}
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// Evaluate cone equation.
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double vtkCone::EvaluateFunction( double x[3] )
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{
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double tanTheta = tan( vtkMath::RadiansFromDegrees( this->Angle) );
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return x[1] * x[1] + x[2] * x[2] - x[0] * x[0] * tanTheta * tanTheta;
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}
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// Evaluate cone normal.
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void vtkCone::EvaluateGradient( double x[3], double g[3] )
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{
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double tanTheta = tan( vtkMath::RadiansFromDegrees( this->Angle) );
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g[0] = -2.0 * x[0] * tanTheta * tanTheta;
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g[1] = 2.0 * x[1];
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g[2] = 2.0 * x[2];
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}
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void vtkCone::PrintSelf( ostream& os, vtkIndent indent )
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{
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this->Superclass::PrintSelf( os, indent );
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os << indent << "Angle: " << this->Angle << "\n";
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}
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