### Description

* Contributed by: Jinyoung Hwang

This example reads a structured points dataset stored in a .vtk file and constructs a 3D model using vtkMarchingCubes.
vtkPolyDataConnectivityFilter is used to extract the largest isosurface.

Data is available at:

1. test.vtk: http://web.kaist.ac.kr/~hjy/test.vtk

2. brainweb.img: http://web.kaist.ac.kr/~hjy/brainweb.img

3. brainweb.hdr: http://web.kaist.ac.kr/~hjy/brainweb.hdr

Second and third datasets can be downloaded from [BrainWeb](http://www.bic.mni.mcgill.ca/brainweb/), which is free of charge in use for a research.
"test.vtk" was converted from "brainweb.img" using a program by Erik Vidholm (http://www.cb.uu.se/~erik/vtk/rawToVTK.cpp).

The examples expects 2 or 3 argments:

 ExtractLargestIsosurface InputFilename Threshold ExtractLargest
  if ExtractLargest is omitted or 1, the largest isosurface is extracted
  if ExtractLargest is 0, all of the isosurfaces are extracted

Try

```
ExtractLargestIsosurface test.vtk 50 1
```

and compare the results to

```
 ExtractLargestIsosurface test.vtk 50 0
```

A tutorial on how to setup a Windows Forms Application utilizing ActiViz.NET can be found here: [Setup a Windows Forms Application to use ActiViz.NET](http://www.vtk.org/Wiki/VTK/CSharp/ActiViz.NET)
