ColorCellsWithRGB

VTKExamples/Java/PolyData/ColorCellsWithRGB


Description

This example shows how to assign specific colors to individual cells of a vtkPolyData. This example stores the vtkCellData as rgb triples in a vtkUnsignedCharArray.

Other Languages

See (Cxx)

Question

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Code

ColorCellsWithRGB.java

import vtk.vtkActor;
import vtk.vtkNativeLibrary;
import vtk.vtkMath;
import vtk.vtkUnsignedCharArray;
import vtk.vtkPlaneSource;
import vtk.vtkPolyDataMapper;
import vtk.vtkRenderWindow;
import vtk.vtkRenderWindowInteractor;
import vtk.vtkRenderer;
import vtk.vtkNamedColors;


public class ColorCellsWithRGB  
{

  // -----------------------------------------------------------------
  // Load VTK library and print which library was not properly loaded
  static 
  {
    if (!vtkNativeLibrary.LoadAllNativeLibraries()) 
    {
      for (vtkNativeLibrary lib : vtkNativeLibrary.values()) 
      {
        if (!lib.IsLoaded()) 
        {
          System.out.println(lib.GetLibraryName() + " not loaded");
        }
      }
    }
    vtkNativeLibrary.DisableOutputWindow(null);
  }
  // -----------------------------------------------------------------

  public static void main(String s[]) 
  {
    vtkNamedColors Color = new vtkNamedColors(); 
    //Renderer Background Color
    double BgColor[] = new double[4];
    //Change Color Name to Use your own Color for Renderer Background
    Color.GetColor("DarkGray",BgColor);

    // Provide some geometry
    int resolutionX = 5;
    int resolutionY = 3;

    vtkPlaneSource aPlane = new vtkPlaneSource();
    aPlane.SetXResolution(resolutionX);
    aPlane.SetYResolution(resolutionY);
    aPlane.Update();

    // Create cell data  
    vtkMath RS = new vtkMath();
    RS.RandomSeed(8775070);

    vtkUnsignedCharArray CellData = new vtkUnsignedCharArray();
    CellData.SetNumberOfComponents(3);
    CellData.SetNumberOfTuples(aPlane.GetOutput().GetNumberOfCells());

    for(int i=0;i<aPlane.GetOutput().GetNumberOfCells();i++)
    {
      double rgb[] = new double[3];
      rgb[0] = RS.Random(64, 255);
      rgb[1] = RS.Random(64, 255);
      rgb[2] = RS.Random(64, 255);
      CellData.InsertTuple3(i, rgb[0], rgb[1],rgb[2]);

    }

    aPlane.GetOutput().GetCellData().SetScalars(CellData);


    vtkPolyDataMapper Mapper = new vtkPolyDataMapper();
    Mapper.SetInputConnection(aPlane.GetOutputPort());

    vtkActor Actor = new vtkActor();
    Actor.SetMapper(Mapper);


    // Create the renderer, render window and interactor.
    vtkRenderer ren = new vtkRenderer();
    vtkRenderWindow renWin = new vtkRenderWindow();
    renWin.AddRenderer(ren);
    vtkRenderWindowInteractor iren = new vtkRenderWindowInteractor();
    iren.SetRenderWindow(renWin);

    // Visualise the arrow
    ren.AddActor(Actor);
    ren.SetBackground(BgColor);
    ren.ResetCamera();

    renWin.SetSize(300,300);
    renWin.Render();

    iren.Initialize();
    iren.Start();
  }
}