ImageDataGeometryFilter
VTKExamples/Cxx/ImageData/ImageDataGeometryFilter
Description
Convert a vtkImageData to a vtkPolyData.
Code
ImageDataGeometryFilter.cxx
#include <vtkSphereSource.h>
#include <vtkPolyData.h>
#include <vtkSmartPointer.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkImageData.h>
#include <vtkImageCanvasSource2D.h>
#include <vtkImageDataGeometryFilter.h>
int main(int, char *[])
{
// Create an image
vtkSmartPointer<vtkImageCanvasSource2D> source1 =
vtkSmartPointer<vtkImageCanvasSource2D>::New();
source1->SetScalarTypeToUnsignedChar();
source1->SetNumberOfScalarComponents(3);
source1->SetExtent(0, 100, 0, 100, 0, 0);
source1->SetDrawColor(0,0,0,1);
source1->FillBox(0, 100, 0, 100);
source1->SetDrawColor(255,0,0,1);
source1->FillBox(10, 20, 10, 20);
source1->FillBox(40, 50, 20, 30);
source1->Update();
// Convert the image to a polydata
vtkSmartPointer<vtkImageDataGeometryFilter> imageDataGeometryFilter =
vtkSmartPointer<vtkImageDataGeometryFilter>::New();
imageDataGeometryFilter->SetInputConnection(source1->GetOutputPort());
imageDataGeometryFilter->Update();
// Create a mapper and actor
vtkSmartPointer<vtkPolyDataMapper> mapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
mapper->SetInputConnection(imageDataGeometryFilter->GetOutputPort());
vtkSmartPointer<vtkActor> actor =
vtkSmartPointer<vtkActor>::New();
actor->SetMapper(mapper);
// Visualization
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 2.8)
PROJECT(ImageDataGeometryFilter)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(ImageDataGeometryFilter MACOSX_BUNDLE ImageDataGeometryFilter.cxx)
target_link_libraries(ImageDataGeometryFilter ${VTK_LIBRARIES})
Download and Build ImageDataGeometryFilter
Click here to download ImageDataGeometryFilter and its CMakeLists.txt file. Once the tarball ImageDataGeometryFilter.tar has been downloaded and extracted,
cd ImageDataGeometryFilter/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:
./ImageDataGeometryFilter
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.