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82 lines
2.3 KiB
C++
82 lines
2.3 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkImplicitHalo.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 "vtkImplicitHalo.h"
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#include "vtkMath.h"
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#include "vtkObjectFactory.h"
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#include <cassert>
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vtkStandardNewMacro(vtkImplicitHalo);
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// ----------------------------------------------------------------------------
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vtkImplicitHalo::vtkImplicitHalo()
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{
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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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this->Radius=1.0;
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this->FadeOut=0.01;
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}
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// ----------------------------------------------------------------------------
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vtkImplicitHalo::~vtkImplicitHalo()
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{
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}
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// ----------------------------------------------------------------------------
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double vtkImplicitHalo::EvaluateFunction(double x[3])
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{
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double result;
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double distance=sqrt(vtkMath::Distance2BetweenPoints(this->Center,x));
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if(distance>this->Radius)
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{
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result=0.0;
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}
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else
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{
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double smallRadius=this->Radius*(1.0-this->FadeOut);
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if(distance<=smallRadius)
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{
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result=1.0;
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}
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else
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{
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// here this->FadeOut and this->Radius cannot be 0.0 as they are handled
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// by the cases seen above.
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result=(1.0-distance/this->Radius)/this->FadeOut;
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}
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}
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return result;
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}
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// ----------------------------------------------------------------------------
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void vtkImplicitHalo::EvaluateGradient(double vtkNotUsed(x)[3],
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double vtkNotUsed(g)[3])
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{
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assert("check: TODO" && false);
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}
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// ----------------------------------------------------------------------------
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void vtkImplicitHalo::PrintSelf(ostream &os,
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vtkIndent indent)
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{
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this->Superclass::PrintSelf(os,indent);
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os << indent << "Center: " << this->Center[0] << "," << this->Center[1]
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<< "," << this->Center[2] << endl;
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os << indent << "Radius: " << this->Radius << endl;
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os << indent << "FadeOut: " << this->FadeOut << endl;
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}
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