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/*=========================================================================
Program: Visualization Toolkit
Module: vtkThresholdTextureCoords.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 "vtkThresholdTextureCoords.h"
#include "vtkDataSet.h"
#include "vtkFloatArray.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
vtkStandardNewMacro(vtkThresholdTextureCoords);
// Construct with lower threshold=0, upper threshold=1, threshold
// function=upper, and texture dimension = 2. The "out" texture coordinate
// is (0.25,0,0); the "in" texture coordinate is (0.75,0,0).
vtkThresholdTextureCoords::vtkThresholdTextureCoords()
{
this->LowerThreshold = 0.0;
this->UpperThreshold = 1.0;
this->TextureDimension = 2;
this->ThresholdFunction = &vtkThresholdTextureCoords::Upper;
this->OutTextureCoord[0] = 0.25;
this->OutTextureCoord[1] = 0.0;
this->OutTextureCoord[2] = 0.0;
this->InTextureCoord[0] = 0.75;
this->InTextureCoord[1] = 0.0;
this->InTextureCoord[2] = 0.0;
}
// Criterion is cells whose scalars are less than lower threshold.
void vtkThresholdTextureCoords::ThresholdByLower(double lower)
{
if ( this->LowerThreshold != lower )
{
this->LowerThreshold = lower;
this->ThresholdFunction = &vtkThresholdTextureCoords::Lower;
this->Modified();
}
}
// Criterion is cells whose scalars are less than upper threshold.
void vtkThresholdTextureCoords::ThresholdByUpper(double upper)
{
if ( this->UpperThreshold != upper )
{
this->UpperThreshold = upper;
this->ThresholdFunction = &vtkThresholdTextureCoords::Upper;
this->Modified();
}
}
// Criterion is cells whose scalars are between lower and upper thresholds.
void vtkThresholdTextureCoords::ThresholdBetween(double lower, double upper)
{
if ( this->LowerThreshold != lower || this->UpperThreshold != upper )
{
this->LowerThreshold = lower;
this->UpperThreshold = upper;
this->ThresholdFunction = &vtkThresholdTextureCoords::Between;
this->Modified();
}
}
int vtkThresholdTextureCoords::RequestData(
vtkInformation *vtkNotUsed(request),
vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
// get the info objects
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
vtkInformation *outInfo = outputVector->GetInformationObject(0);
// get the input and output
vtkDataSet *input = vtkDataSet::SafeDownCast(
inInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkDataSet *output = vtkDataSet::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkIdType numPts;
vtkFloatArray *newTCoords;
vtkIdType ptId;
vtkDataArray *inScalars;
vtkDebugMacro(<< "Executing texture threshold filter");
// First, copy the input to the output as a starting point
output->CopyStructure( input );
if ( ! (inScalars = input->GetPointData()->GetScalars()) )
{
vtkErrorMacro(<<"No scalar data to texture threshold");
return 1;
}
numPts = input->GetNumberOfPoints();
newTCoords = vtkFloatArray::New();
newTCoords->SetNumberOfComponents(2);
newTCoords->Allocate(2*this->TextureDimension);
// Check that the scalars of each point satisfy the threshold criterion
for (ptId=0; ptId < numPts; ptId++)
{
if ( (this->*(this->ThresholdFunction))(inScalars->GetComponent(ptId,0)) )
{
newTCoords->InsertTuple(ptId,this->InTextureCoord);
}
else //doesn't satisfy criterion
{
newTCoords->InsertTuple(ptId,this->OutTextureCoord);
}
} //for all points
output->GetPointData()->CopyTCoordsOff();
output->GetPointData()->PassData(input->GetPointData());
output->GetPointData()->SetTCoords(newTCoords);
newTCoords->Delete();
return 1;
}
void vtkThresholdTextureCoords::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
if ( this->ThresholdFunction == &vtkThresholdTextureCoords::Upper )
{
os << indent << "Threshold By Upper\n";
}
else if ( this->ThresholdFunction == &vtkThresholdTextureCoords::Lower )
{
os << indent << "Threshold By Lower\n";
}
else if ( this->ThresholdFunction == &vtkThresholdTextureCoords::Between )
{
os << indent << "Threshold Between\n";
}
os << indent << "Lower Threshold: " << this->LowerThreshold << "\n";;
os << indent << "Upper Threshold: " << this->UpperThreshold << "\n";;
os << indent << "Texture Dimension: " << this->TextureDimension << "\n";;
os << indent << "Out Texture Coordinate: (" << this->OutTextureCoord[0]
<< ", " << this->OutTextureCoord[1]
<< ", " << this->OutTextureCoord[2] << ")\n";
os << indent << "In Texture Coordinate: (" << this->InTextureCoord[0]
<< ", " << this->InTextureCoord[1]
<< ", " << this->InTextureCoord[2] << ")\n";
}
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