ImageToStructuredPoints
VTKExamples/Cxx/Images/ImageToStructuredPoints
Code
ImageToStructuredPoints.cxx
#include <vtkSmartPointer.h>
#include <vtkImageData.h>
#include <vtkStructuredPoints.h>
#include <vtkImageCanvasSource2D.h>
#include <vtkImageToStructuredPoints.h>
#include <vtkDataSetMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
int main(int, char *[])
{
// Create an image
vtkSmartPointer<vtkImageCanvasSource2D> source =
vtkSmartPointer<vtkImageCanvasSource2D>::New();
source->SetExtent(0, 20, 0, 20, 0, 0);
source->SetScalarTypeToUnsignedChar();
source->SetNumberOfScalarComponents(3);
source->SetDrawColor(127,127,127);
source->FillBox(0,20,0,20);
source->SetDrawColor(255,127,127);
source->FillBox(0,15,0,20);
source->Update();
vtkSmartPointer<vtkImageToStructuredPoints> convertFilter =
vtkSmartPointer<vtkImageToStructuredPoints>::New();
convertFilter->SetInputConnection(source->GetOutputPort());
convertFilter->Update();
// vtkStructuredPoints* structuredPoints = convertFilter->GetStructuredPointsOutput();
// Create a mapper and actor
vtkSmartPointer<vtkDataSetMapper> mapper =
vtkSmartPointer<vtkDataSetMapper>::New();
mapper->SetInputConnection(convertFilter->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(.3, .6, .3); // Background color green
// Render and interact
renderWindow->Render();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(ImageToStructuredPoints)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(ImageToStructuredPoints MACOSX_BUNDLE ImageToStructuredPoints.cxx)
target_link_libraries(ImageToStructuredPoints ${VTK_LIBRARIES})
Download and Build ImageToStructuredPoints
Click here to download ImageToStructuredPoints and its CMakeLists.txt file. Once the tarball ImageToStructuredPoints.tar has been downloaded and extracted,
cd ImageToStructuredPoints/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:
./ImageToStructuredPoints
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.