ColorGlyphs
VTKExamples/Cxx/Visualization/ColorGlyphs
Description¶
This example creates a red, green, and blue cube.
Question
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Code¶
ColorGlyphs.cxx
#include <vtkSmartPointer.h> #include <vtkPointData.h> #include <vtkCubeSource.h> #include <vtkPolyData.h> #include <vtkPoints.h> #include <vtkGlyph3D.h> #include <vtkCellArray.h> #include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> #include <vtkUnsignedCharArray.h> // For compatibility with new VTK generic data arrays #ifdef vtkGenericDataArray_h #define InsertNextTupleValue InsertNextTypedTuple #endif int main(int, char *[]) { // Create points vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New(); points->InsertNextPoint(0,0,0); points->InsertNextPoint(5,0,0); points->InsertNextPoint(10,0,0); // Setup scales. This can also be an Int array // char is used since it takes the least memory vtkSmartPointer<vtkUnsignedCharArray> colors = vtkSmartPointer<vtkUnsignedCharArray>::New(); colors->SetName("colors"); colors->SetNumberOfComponents(3); unsigned char r[3] = {255,0,0}; unsigned char g[3] = {0,255,0}; unsigned char b[3] = {0,0,255}; colors->InsertNextTupleValue(r); colors->InsertNextTupleValue(g); colors->InsertNextTupleValue(b); // Combine into a polydata vtkSmartPointer<vtkPolyData> polydata = vtkSmartPointer<vtkPolyData>::New(); polydata->SetPoints(points); polydata->GetPointData()->SetScalars(colors); // Create anything you want here, we will use a cube for the demo. vtkSmartPointer<vtkCubeSource> cubeSource = vtkSmartPointer<vtkCubeSource>::New(); vtkSmartPointer<vtkGlyph3D> glyph3D = vtkSmartPointer<vtkGlyph3D>::New(); glyph3D->SetColorModeToColorByScalar(); glyph3D->SetSourceConnection(cubeSource->GetOutputPort()); glyph3D->SetInputData(polydata); glyph3D->ScalingOff(); glyph3D->Update(); // Create a mapper and actor vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper->SetInputConnection(glyph3D->GetOutputPort()); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); // Visualize 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); renderer->SetBackground(1,1,1); // Background color white renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR) project(ColorGlyphs) find_package(VTK COMPONENTS vtkCommonCore vtkCommonDataModel vtkFiltersCore vtkFiltersSources vtkInteractionStyle vtkRenderingCore vtkRenderingFreeType vtkRenderingOpenGL2 QUIET) if (NOT VTK_FOUND) message("Skipping ColorGlyphs: ${VTK_NOT_FOUND_MESSAGE}") return () endif() message (STATUS "VTK_VERSION: ${VTK_VERSION}") if (VTK_VERSION VERSION_LESS "8.90.0") # old system include(${VTK_USE_FILE}) add_executable(ColorGlyphs MACOSX_BUNDLE ColorGlyphs.cxx ) target_link_libraries(ColorGlyphs PRIVATE ${VTK_LIBRARIES}) else () # include all components add_executable(ColorGlyphs MACOSX_BUNDLE ColorGlyphs.cxx ) target_link_libraries(ColorGlyphs PRIVATE ${VTK_LIBRARIES}) # vtk_module_autoinit is needed vtk_module_autoinit( TARGETS ColorGlyphs MODULES ${VTK_LIBRARIES} ) endif ()
Download and Build ColorGlyphs¶
Click here to download ColorGlyphs and its CMakeLists.txt file. Once the tarball ColorGlyphs.tar has been downloaded and extracted,
cd ColorGlyphs/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:
./ColorGlyphs
WINDOWS USERS
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.