TextSource
VTKExamples/Cxx/Visualization/TextSource
Description¶
This example displays a 3D polygonal text saying "Hello", using the 9x15 font from X Windows. That is a raster (pixelized) font, so characters are formed by converting the pixels on each character into quadrilaterals. vtkVectorText generates higher quality polygonal representations of text, so it is recommended instead -- see VectorText for an example of this.
Code¶
TextSource.cxx
#include <vtkTextSource.h> #include <vtkPolyData.h> #include <vtkSmartPointer.h> #include <vtkPolyDataMapper.h> #include <vtkActor.h> #include <vtkRenderWindow.h> #include <vtkRenderer.h> #include <vtkRenderWindowInteractor.h> int main(int, char *[]) { // Create text vtkSmartPointer<vtkTextSource> textSource = vtkSmartPointer<vtkTextSource>::New(); textSource->SetText("Hello"); textSource->SetForegroundColor(1.0, 0.0, 0.0); textSource->BackingOff(); textSource->Update(); // Create a mapper and actor vtkSmartPointer<vtkPolyDataMapper> mapper = vtkSmartPointer<vtkPolyDataMapper>::New(); mapper->SetInputConnection(textSource->GetOutputPort()); vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New(); actor->SetMapper(mapper); // Create a renderer, render window, and interactor vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New(); vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New(); renderWindow->AddRenderer(renderer); vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New(); renderWindowInteractor->SetRenderWindow(renderWindow); // Add the actor to the scene renderer->AddActor(actor); renderer->SetBackground(1,1,1); // Background color white // Render and interact renderWindow->Render(); renderWindowInteractor->Start(); return EXIT_SUCCESS; }
CMakeLists.txt¶
cmake_minimum_required(VERSION 2.8) PROJECT(TextSource) find_package(VTK REQUIRED) include(${VTK_USE_FILE}) add_executable(TextSource MACOSX_BUNDLE TextSource.cxx) target_link_libraries(TextSource ${VTK_LIBRARIES})
Download and Build TextSource¶
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 Some tarballs may be missing or out-of-date.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 TextSource and its CMakeLists.txt file. Once the tarball TextSource.tar has been downloaded and extracted,
cd TextSource/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:
./TextSource
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.