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¶
Danger
The generation of tar files has not been ported to the new VTKExamples. Some tarballs may be missing or out-of-date.
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.