ParallelCoordinatesView
VTKExamples/Cxx/InfoVis/ParallelCoordinatesView
Code
ParallelCoordinatesView.cxx
#include <vtkVersion.h>
#include <vtkSmartPointer.h>
#include <vtkPolyData.h>
#include <vtkDelimitedTextReader.h>
#include <vtkTable.h>
#include <vtkPointData.h>
#include <vtkParallelCoordinatesView.h>
#include <vtkParallelCoordinatesRepresentation.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkStringArray.h>
#include <vtkDoubleArray.h>
#include <vtkFloatArray.h>
#include <vtkIntArray.h>
#include <vtksys/SystemTools.hxx>
int main(int argc, char* argv[])
{
vtkSmartPointer<vtkTable> table =
vtkSmartPointer<vtkTable>::New();
std::string title;
if(argc > 1)
{
std::string inputFilename;
inputFilename = argv[1];
vtkSmartPointer<vtkDelimitedTextReader> reader =
vtkSmartPointer<vtkDelimitedTextReader>::New();
reader->SetFileName(inputFilename.c_str());
reader->SetHaveHeaders(1);
reader->DetectNumericColumnsOn();
reader->SetFieldDelimiterCharacters(",");
reader->Update();
table = reader->GetOutput();
title = vtksys::SystemTools::GetFilenameWithoutExtension(
vtksys::SystemTools::GetFilenameName(inputFilename));
}
else
{
title = "Generated Data";
vtkSmartPointer<vtkIntArray> array1 =
vtkSmartPointer<vtkIntArray>::New();
array1->SetName("Array1");
array1->SetNumberOfComponents(1);
array1->InsertNextValue(0);
array1->InsertNextValue(1);
array1->InsertNextValue(2);
array1->InsertNextValue(3);
array1->InsertNextValue(4);
vtkSmartPointer<vtkFloatArray> array2 =
vtkSmartPointer<vtkFloatArray>::New();
array2->SetName("Array2");
array2->SetNumberOfComponents(1);
array2->InsertNextValue(-0);
array2->InsertNextValue(-1);
array2->InsertNextValue(-2);
array2->InsertNextValue(-3);
array2->InsertNextValue(-4);
vtkSmartPointer<vtkDoubleArray> array3 =
vtkSmartPointer<vtkDoubleArray>::New();
array3->SetName("Array3");
array3->SetNumberOfComponents(1);
array3->InsertNextValue(0);
array3->InsertNextValue(1);
array3->InsertNextValue(4);
array3->InsertNextValue(9);
array3->InsertNextValue(16);
table->AddColumn(array1);
table->AddColumn(array2);
table->AddColumn(array3);
}
vtkSmartPointer<vtkPolyData> polydata =
vtkSmartPointer<vtkPolyData>::New();
for (vtkIdType i = 0; i < table->GetNumberOfColumns(); ++i)
{
if (vtkStringArray::SafeDownCast(table->GetColumn(i)))
{
std::cout << i << " is "
<< "StringArray named ";
}
else if (vtkDoubleArray::SafeDownCast(table->GetColumn(i)))
{
std::cout << i << " is "
<< "DoubleArray named ";
}
else if (vtkFloatArray::SafeDownCast(table->GetColumn(i)))
{
std::cout << i << " is "
<< "DoubleArray named ";
}
else if (vtkIntArray::SafeDownCast(table->GetColumn(i)))
{
std::cout << i << " is "
<< "IntArray named ";
}
else
{
std::cout << i << " is "
<< "Unknown type named ";
}
std::cout << "\"" << table->GetColumn(i)->GetName() << "\"" << std::endl;
polydata->GetPointData()->AddArray(table->GetColumn(i));
}
vtkSmartPointer<vtkParallelCoordinatesRepresentation> rep =
vtkSmartPointer<vtkParallelCoordinatesRepresentation>::New();
#if VTK_MAJOR_VERSION <= 5
rep->SetInputConnection(polydata->GetProducerPort());
#else
rep->SetInputData(polydata);
#endif
// List all of the attribute arrays you want plotted in parallel coordinates
// Set up the parallel coordinates Representation to be used in the View
for (vtkIdType i = 0; i < table->GetNumberOfColumns(); ++i)
{
if (vtkStringArray::SafeDownCast(table->GetColumn(i)))
{
continue;
}
else
{
rep->SetInputArrayToProcess(i, 0, 0, 0, table->GetColumn(i)->GetName());
}
}
rep->UseCurvesOn();
rep->SetFontSize(.5);
rep->SetPlotTitle(title.c_str());
rep->SetLineOpacity(0.5);
rep->SetLineColor(0.89, 0.81, 0.3);
rep->SetAxisColor(1.0, 0.3882, 0.2784);
rep->SetAxisLabelColor(1, 1, 1);
// Set up the Parallel Coordinates View and hook in the Representation
vtkSmartPointer<vtkParallelCoordinatesView> view =
vtkSmartPointer<vtkParallelCoordinatesView>::New();
view->SetRepresentation(rep);
view->SetInspectMode(1);
view->SetDisplayHoverText(1);
// Brush Mode determines the type of interaction you perform to select data
view->SetBrushModeToLasso();
view->SetBrushOperatorToReplace();
// Set up render window
view->GetRenderWindow()->SetSize(600,300);
view->ResetCamera();
view->Render();
// Start interaction event loop
view->GetInteractor()->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(ParallelCoordinatesView)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(ParallelCoordinatesView MACOSX_BUNDLE ParallelCoordinatesView.cxx)
target_link_libraries(ParallelCoordinatesView ${VTK_LIBRARIES})
Download and Build ParallelCoordinatesView
Click here to download ParallelCoordinatesView and its CMakeLists.txt file. Once the tarball ParallelCoordinatesView.tar has been downloaded and extracted,
cd ParallelCoordinatesView/build
If VTK is installed:
cmake ..
If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:
cmake -DVTK_DIR:PATH=/home/me/vtk_build ..
Build the project:
make
and run it:
./ParallelCoordinatesView
WINDOWS USERS PLEASE NOTE: Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.