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/*=========================================================================
Program: ParaView
Module: vtkPVExponentialKeyFrame.cxx
Copyright (c) Kitware, Inc.
All rights reserved.
See Copyright.txt or http://www.paraview.org/HTML/Copyright.html 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 "vtkPVExponentialKeyFrame.h"
#include "vtkObjectFactory.h"
#include "vtkPVAnimationCue.h"
#include <math.h>
vtkStandardNewMacro(vtkPVExponentialKeyFrame);
//----------------------------------------------------------------------------
vtkPVExponentialKeyFrame::vtkPVExponentialKeyFrame()
{
this->Base = 2.0;
this->StartPower = -1.0;
this->EndPower = -5.0;
}
//----------------------------------------------------------------------------
vtkPVExponentialKeyFrame::~vtkPVExponentialKeyFrame()
{
}
//----------------------------------------------------------------------------
// remeber that currenttime is 0 at the KeyTime of this key frame
// and 1 and the KeyTime of the next key frame. Hence,
// currenttime belongs to the interval [0,1).
void vtkPVExponentialKeyFrame::UpdateValue( double currenttime,
vtkPVAnimationCue* cue,
vtkPVKeyFrame* next)
{
if (!next)
{
return;
}
if (this->Base == 1)
{
vtkErrorMacro("Exponential with base 1");
}
// Do some computation
int animated_element = cue->GetAnimatedElement();
double tcur = pow(this->Base, this->StartPower + currenttime *
(this->EndPower- this->StartPower));
double tmin = pow(this->Base, this->StartPower);
double tmax = pow(this->Base, this->EndPower);
double t = (this->Base!= 1) ? (tcur - tmin) / (tmax - tmin): 0;
// Apply changes
cue->BeginUpdateAnimationValues();
if (animated_element != -1)
{
double vmax = next->GetKeyValue();
double vmin = this->GetKeyValue();
double value = vmin + t * (vmax - vmin);
cue->SetAnimationValue(animated_element, value);
}
else
{
unsigned int start_novalues = this->GetNumberOfKeyValues();
unsigned int end_novalues = next->GetNumberOfKeyValues();
unsigned int min = (start_novalues < end_novalues)
? start_novalues : end_novalues;
unsigned int i;
// interpolate common indices.
for (i=0; i < min; i++)
{
double vmax = next->GetKeyValue(i);
double vmin = this->GetKeyValue(i);
double value = vmin + t * (vmax - vmin);
cue->SetAnimationValue(i, value);
}
// add any additional indices in start key frame.
for (i = min; i < start_novalues; i++)
{
cue->SetAnimationValue( i, this->GetKeyValue(i) );
}
}
cue->EndUpdateAnimationValues();
}
//----------------------------------------------------------------------------
void vtkPVExponentialKeyFrame::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "Base: " << this->Base << endl;
os << indent << "StartPower: " << this->StartPower << endl;
os << indent << "EndPower: " << this->EndPower << endl;
}
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