ColoredPoints
VTKExamples/Cxx/PolyData/ColoredPoints
Code
ColoredPoints.cxx
#include <vtkVersion.h>
#include <vtkSmartPointer.h>
#include <vtkPoints.h>
#include <vtkPolyData.h>
#include <vtkPointData.h>
#include <vtkCellArray.h>
#include <vtkUnsignedCharArray.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkVertexGlyphFilter.h>
#include <vtkProperty.h>
// For compatibility with new VTK generic data arrays
#ifdef vtkGenericDataArray_h
#define InsertNextTupleValue InsertNextTypedTuple
#endif
int main(int, char *[])
{
vtkSmartPointer<vtkPoints> points =
vtkSmartPointer<vtkPoints>::New();
points->InsertNextPoint (0.0, 0.0, 0.0);
points->InsertNextPoint (1.0, 0.0, 0.0);
points->InsertNextPoint (0.0, 1.0, 0.0);
vtkSmartPointer<vtkPolyData> pointsPolydata =
vtkSmartPointer<vtkPolyData>::New();
pointsPolydata->SetPoints(points);
vtkSmartPointer<vtkVertexGlyphFilter> vertexFilter =
vtkSmartPointer<vtkVertexGlyphFilter>::New();
#if VTK_MAJOR_VERSION <= 5
vertexFilter->SetInputConnection(pointsPolydata->GetProducerPort());
#else
vertexFilter->SetInputData(pointsPolydata);
#endif
vertexFilter->Update();
vtkSmartPointer<vtkPolyData> polydata =
vtkSmartPointer<vtkPolyData>::New();
polydata->ShallowCopy(vertexFilter->GetOutput());
// Setup colors
unsigned char red[3] = {255, 0, 0};
unsigned char green[3] = {0, 255, 0};
unsigned char blue[3] = {0, 0, 255};
vtkSmartPointer<vtkUnsignedCharArray> colors =
vtkSmartPointer<vtkUnsignedCharArray>::New();
colors->SetNumberOfComponents(3);
colors->SetName ("Colors");
colors->InsertNextTupleValue(red);
colors->InsertNextTupleValue(green);
colors->InsertNextTupleValue(blue);
polydata->GetPointData()->SetScalars(colors);
// Visualization
vtkSmartPointer<vtkPolyDataMapper> mapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
#if VTK_MAJOR_VERSION <= 5
mapper->SetInputConnection(polydata->GetProducerPort());
#else
mapper->SetInputData(polydata);
#endif
vtkSmartPointer<vtkActor> actor =
vtkSmartPointer<vtkActor>::New();
actor->SetMapper(mapper);
actor->GetProperty()->SetPointSize(5);
vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->AddRenderer(renderer);
vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
renderWindowInteractor->SetRenderWindow(renderWindow);
renderer->AddActor(actor);
renderWindow->Render();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(ColoredPoints)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(ColoredPoints MACOSX_BUNDLE ColoredPoints.cxx)
target_link_libraries(ColoredPoints ${VTK_LIBRARIES})
Download and Build ColoredPoints
Click here to download ColoredPoints and its CMakeLists.txt file. Once the tarball ColoredPoints.tar has been downloaded and extracted,
cd ColoredPoints/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:
./ColoredPoints
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.