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/*=========================================================================
Program: Visualization Toolkit
Module: vtkImplicitWindowFunction.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkImplicitWindowFunction.h"
#include "vtkGarbageCollector.h"
#include "vtkObjectFactory.h"
vtkStandardNewMacro(vtkImplicitWindowFunction);
vtkCxxSetObjectMacro(vtkImplicitWindowFunction,ImplicitFunction,vtkImplicitFunction);
// Construct object with window range (0,1) and window values (0,1).
vtkImplicitWindowFunction::vtkImplicitWindowFunction()
{
this->ImplicitFunction = NULL;
this->WindowRange[0] = 0.0;
this->WindowRange[1] = 1.0;
this->WindowValues[0] = 0.0;
this->WindowValues[1] = 1.0;
}
vtkImplicitWindowFunction::~vtkImplicitWindowFunction()
{
this->SetImplicitFunction(NULL);
}
// Evaluate window function.
double vtkImplicitWindowFunction::EvaluateFunction(double x[3])
{
static int beenWarned=0;
double value, diff1, diff2, scaledRange;
if ( ! this->ImplicitFunction && ! beenWarned )
{
vtkErrorMacro(<<"Implicit function must be defined");
beenWarned = 1;
return 0.0;
}
value = this->ImplicitFunction->EvaluateFunction(x);
diff1 = value - this->WindowRange[0];
diff2 = value - this->WindowRange[1];
scaledRange = (this->WindowValues[1] - this->WindowValues[0]) / 2.0;
if ( scaledRange == 0.0 )
{
scaledRange = 1.0;
}
if ( diff1 >= 0.0 && diff2 <= 0.0 ) //within window
{
if ( diff1 <= (-diff2) )
{
value = diff1 / scaledRange + this->WindowValues[0];
}
else
{
value = (-diff2) / scaledRange + this->WindowValues[0];
}
}
else if ( diff1 < 0.0 ) //below window
{
value = diff1 / scaledRange + this->WindowValues[0];
}
else //above window
{
value = -diff2 / scaledRange + this->WindowValues[0];
}
return value;
}
// Evaluate window function gradient. Just return implicit function gradient.
void vtkImplicitWindowFunction::EvaluateGradient(double x[3], double n[3])
{
if ( this->ImplicitFunction )
{
this->ImplicitFunction->EvaluateGradient(x,n);
}
}
unsigned long int vtkImplicitWindowFunction::GetMTime()
{
unsigned long int fMtime;
unsigned long int mtime = this->vtkImplicitFunction::GetMTime();
if ( this->ImplicitFunction )
{
fMtime = this->ImplicitFunction->GetMTime();
if ( fMtime > mtime )
{
mtime = fMtime;
}
}
return mtime;
}
void vtkImplicitWindowFunction::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
if ( this->ImplicitFunction )
{
os << indent << "Implicit Function: " << this->ImplicitFunction << "\n";
}
else
{
os << indent << "No implicit function defined.\n";
}
os << indent << "Window Range: (" << this->WindowRange[0]
<< ", " << this->WindowRange[1] << ")\n";
os << indent << "Window Values: (" << this->WindowValues[0]
<< ", " << this->WindowValues[1] << ")\n";
}
//----------------------------------------------------------------------------
void vtkImplicitWindowFunction::Register(vtkObjectBase* o)
{
this->RegisterInternal(o, 1);
}
//----------------------------------------------------------------------------
void vtkImplicitWindowFunction::UnRegister(vtkObjectBase* o)
{
this->UnRegisterInternal(o, 1);
}
//----------------------------------------------------------------------------
void
vtkImplicitWindowFunction
::ReportReferences(vtkGarbageCollector* collector)
{
this->Superclass::ReportReferences(collector);
// These filters share our input and are therefore involved in a
// reference loop.
vtkGarbageCollectorReport(collector, this->ImplicitFunction,
"ImplicitFunction");
}
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