# OBBDicer

VTKExamples/CSharp/Meshes/OBBDicer

### Description

The vtkOBBDicer filter breaks up an input mesh into a number of pieces. The resulting mesh contains scalar point data that can be used to extract the individual pieces with a filter like vtkThresholdFilter. This examples displays the output of vtkOBBDicer with a different color for each piece.

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
Note: As long as ActiViz.NET is not build with VTK version 6.0 or higher you must define the preprocessor directive VTK_MAJOR_VERSION_5.

### Code

OBBDicer.cs

    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Windows.Forms;
    using System.Diagnostics;

    using Kitware.VTK;

    namespace ActiViz.Examples {
       public partial class Form1 : Form {
          public Form1() {
             InitializeComponent();
          }

          private void renderWindowControl1_Load(object sender, EventArgs e) {
             try {
                OBBDicer(null);
             }
             catch(Exception ex) {
                MessageBox.Show(ex.Message, "Exception", MessageBoxButtons.OK);
             }
          }

          private void OBBDicer(string filePath) {
             vtkPolyData inputPolyData;
             if(filePath != null) {
                vtkXMLPolyDataReader reader = vtkXMLPolyDataReader.New();
                reader.SetFileName(filePath);
                reader.Update();
                inputPolyData = reader.GetOutput();
             }
             else {
                vtkSphereSource sphereSource = vtkSphereSource.New();
                sphereSource.SetThetaResolution(30);
                sphereSource.SetPhiResolution(15);
                sphereSource.Update();
                inputPolyData = sphereSource.GetOutput();
             }

             // Create pipeline
             vtkOBBDicer dicer = vtkOBBDicer.New();
    #if VTK_MAJOR_VERSION_5
             dicer.SetInput(inputPolyData);
    #else
             dicer.SetInputData(inputPolyData);
    #endif
             dicer.SetNumberOfPieces(4);
             dicer.SetDiceModeToSpecifiedNumberOfPieces();
             dicer.Update();

             vtkPolyDataMapper inputMapper = vtkPolyDataMapper.New();
             inputMapper.SetInputConnection(dicer.GetOutputPort());
             inputMapper.SetScalarRange(0, dicer.GetNumberOfActualPieces());

             Debug.WriteLine("Asked for: "
                       + dicer.GetNumberOfPieces() + " pieces, got: "
                       + dicer.GetNumberOfActualPieces());

             vtkActor inputActor = vtkActor.New();
             inputActor.SetMapper(inputMapper);
             inputActor.GetProperty().SetInterpolationToFlat();

             vtkOutlineCornerFilter outline = vtkOutlineCornerFilter.New();
    #if VTK_MAJOR_VERSION_5
             outline.SetInput(inputPolyData);
    #else
             outline.SetInputData(inputPolyData);
    #endif

             vtkPolyDataMapper outlineMapper = vtkPolyDataMapper.New();
             outlineMapper.SetInputConnection(outline.GetOutputPort());

             vtkActor outlineActor = vtkActor.New();
             outlineActor.SetMapper(outlineMapper);
             outlineActor.GetProperty().SetColor(0, 0, 0);
             // get a reference to the renderwindow of our renderWindowControl1
             vtkRenderWindow renderWindow = renderWindowControl1.RenderWindow;
             // renderer
             vtkRenderer renderer = renderWindow.GetRenderers().GetFirstRenderer();
             // set background color
             renderer.SetBackground(.2, .3, .4);
             // add our actor to the renderer
             renderer.AddActor(inputActor);
             renderer.AddActor(outlineActor);
          }
       }
    }