TextSource
VTKExamples/Cxx/Visualization/TextSource
Description
This example displays a 3D polygonal text saying "Hello", using the 9x15 font from [Window System|X Windows]]. That is a raster (pixelized) font, so characters are formed by converting the pixels on each character into quadrilaterals. {{class|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
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.