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/*=========================================================================
Program: Visualization Toolkit
Module: TestNamedComponents.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 "vtkCellData.h"
#include "vtkIdTypeArray.h"
#include "vtkIntArray.h"
#include "vtkPointData.h"
#include "vtkPoints.h"
#include "vtkPolyData.h"
#include "vtkSmartPointer.h"
#include "vtkThreshold.h"
#include "vtkUnstructuredGrid.h"
#include "vtkArrayCalculator.h"
int TestNamedComponents(int , char *[])
{
int rval = 0;
vtkIdType numPoints = 20;
vtkIdType numVerts = 5;
vtkIdType numLines = 8;
vtkIdType numTriangles = 3;
vtkIdType numStrips = 2;
vtkIdType numCells = numVerts+numLines+numTriangles+numStrips;
vtkIdType i;
vtkIdTypeArray* pointCoords = vtkIdTypeArray::New();
const char pcName[] = "point coords";
pointCoords->SetName(pcName);
pointCoords->SetNumberOfComponents(3); // num points + point ids
pointCoords->SetNumberOfTuples(numPoints);
pointCoords->SetComponentName(0,"XLOC");
pointCoords->SetComponentName(1,"YLOC");
pointCoords->SetComponentName(2,"ZLOC");
vtkPoints* points = vtkPoints::New();
points->SetNumberOfPoints(numPoints);
for(i=0;i<numPoints;i++)
{
double loc[3] = {i, i*i, 0};
points->InsertPoint(i, loc);
pointCoords->InsertTuple(i,loc);
}
vtkSmartPointer<vtkPolyData> poly = vtkSmartPointer<vtkPolyData>::New();
poly->Allocate(numCells, numCells);
poly->SetPoints(points);
poly->GetPointData()->AddArray( pointCoords );
pointCoords->Delete();
points->Delete();
for(i=0;i<numVerts;i++)
{
poly->InsertNextCell(VTK_VERTEX, 1, &i);
}
for(i=0;i<numLines;i++)
{
vtkIdType pts[2] = {i, i+1};
poly->InsertNextCell(VTK_LINE, 2, pts);
}
for(i=0;i<numTriangles;i++)
{
vtkIdType pts[3] = {0, i+1, i+2};
poly->InsertNextCell(VTK_TRIANGLE, 3, pts);
}
for(i=0;i<numStrips;i++)
{
vtkIdType pts[3] = {0, i+1, i+2};
poly->InsertNextCell(VTK_TRIANGLE_STRIP, 3, pts);
}
vtkIntArray* cellIndex = vtkIntArray::New();
const char ctName[] = "scalars";
cellIndex->SetName(ctName);
cellIndex->SetNumberOfComponents(1);
cellIndex->SetNumberOfTuples(numCells);
cellIndex->SetComponentName(0,"index");
for(i=0;i<numCells;i++)
{
cellIndex->SetValue(i, i);
}
poly->GetCellData()->SetScalars( cellIndex );
cellIndex->Delete();
vtkIdTypeArray* cellPoints = vtkIdTypeArray::New();
const char cpName[] = "cell points";
cellPoints->SetName(cpName);
cellPoints->SetNumberOfComponents(4); // num points + point ids
cellPoints->SetNumberOfTuples(numCells);
cellPoints->SetComponentName(0,"NumberOfPoints");
cellPoints->SetComponentName(1,"X_ID");
cellPoints->SetComponentName(2,"Y_ID");
cellPoints->SetComponentName(3,"Z_ID");
for(i=0;i<numCells;i++)
{
vtkIdType npts, *pts;
poly->GetCellPoints(i, npts, pts);
vtkIdType data[4] = {npts, pts[0], 0, 0};
for(vtkIdType j=1;j<npts;j++)
{
data[j+1] = pts[j];
}
cellPoints->SetTupleValue(i, data);
}
poly->GetCellData()->AddArray(cellPoints);
cellPoints->Delete();
poly->BuildCells();
vtkSmartPointer<vtkThreshold> thresh = vtkSmartPointer<vtkThreshold>::New();
thresh->SetInput(poly);
thresh->SetInputArrayToProcess(0, 0, 0,
vtkDataObject::FIELD_ASSOCIATION_CELLS,
vtkDataSetAttributes::SCALARS);
thresh->ThresholdBetween(0, 10);
thresh->Update();
vtkSmartPointer<vtkUnstructuredGrid> out = thresh->GetOutput();
if ( out == NULL )
{
vtkGenericWarningMacro("threshold failed.");
return 1;
}
// the arrays should have been changed so get them again...
cellIndex = vtkIntArray::SafeDownCast(out->GetCellData()->GetArray(ctName));
cellPoints = vtkIdTypeArray::SafeDownCast(out->GetCellData()->GetArray(cpName));
//confirm component names are intact
if ( strcmp(cellIndex->GetComponentName(0),"index") != 0 )
{
vtkGenericWarningMacro("threshold failed to mantain component name on cell scalars.");
return 1;
}
if ( strcmp(cellPoints->GetComponentName(0),"NumberOfPoints") != 0 ||
strcmp(cellPoints->GetComponentName(1),"X_ID") != 0 ||
strcmp(cellPoints->GetComponentName(2),"Y_ID") != 0 ||
strcmp(cellPoints->GetComponentName(3),"Z_ID") != 0)
{
vtkGenericWarningMacro("threshold failed to mantain component names on point property.");
return 1;
}
//Test component names with the calculator
vtkSmartPointer<vtkArrayCalculator> calc = vtkSmartPointer<vtkArrayCalculator>::New();
calc->SetInput( poly );
calc->SetAttributeModeToUsePointData();
// Add coordinate scalar and vector variables
calc->AddCoordinateScalarVariable( "coordsX", 0 );
calc->AddScalarVariable("point coords_YLOC","point coords",1 );
calc->SetFunction("coordsX + point coords_YLOC");
calc->SetResultArrayName("Result");
calc->Update();
return rval;
}
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