[vtkusers] SimpleRayCast example in Java

[Rodolfo Allendes Osorio]

Hi Everyone...
 Does anyone have a working copy of the SimpleRayCast example that works on Java? I keep either getting the 'famous' EXCEPTION_ACCESS_VIOLATION error or a bad conversion error, type conversion fail (cant see anythin else, as the text dissapears after a few seconds and its covered by the frame)...

the code i'm using is


import vtk.*;

import javax.swing.*;
import java.awt.*;

/**
 * This is a simple volume rendering example that uses a
 * vtkVolumeRayCast mapper.
 */
public class SimpleRayCast{



  static public void main(String []args) {
    // Setup VTK rendering panel
    vtkPanel renWin = new vtkPanel();

    // Create the reader for the data
    vtkStructuredPointsReader reader = new vtkStructuredPointsReader();
    reader.SetFileName("ironProt.vtk");

    // Create transfer mapping scalar value to opacity
    vtkPiecewiseFunction opacityTransferFunction = new vtkPiecewiseFunction();
    opacityTransferFunction.AddPoint(20, 0.0);
    opacityTransferFunction.AddPoint(255, 0.2);

    // Create transfer mapping scalar value to color
    vtkColorTransferFunction colorTransferFunction = new vtkColorTransferFunction();
    colorTransferFunction.AddRGBPoint(0.0, 0.0, 0.0, 0.0);
    colorTransferFunction.AddRGBPoint(64.0, 1.0, 0.0, 0.0);
    colorTransferFunction.AddRGBPoint(128.0, 0.0, 0.0, 1.0);
    colorTransferFunction.AddRGBPoint(192.0, 0.0, 1.0, 0.0);
    colorTransferFunction.AddRGBPoint(255.0, 0.0, 0.2, 0.0);

    // The property describes how the data will look
    vtkVolumeProperty volumeProperty = new vtkVolumeProperty();
    volumeProperty.SetColor(colorTransferFunction);
    volumeProperty.SetScalarOpacity(opacityTransferFunction);
    volumeProperty.ShadeOn();
    volumeProperty.SetInterpolationTypeToLinear();

    // The mapper / ray cast function know how to render the data
    //vtkVolumeRayCastCompositeFunction compositeFunction = new vtkVolumeRayCastCompositeFunction();
    vtkVolumeRayCastMapper volumeMapper = new vtkVolumeRayCastMapper();
    
    // un-comment this line to get both different errors
    // volumeMapper.SetVolumeRayCastFunction(new vtkVolumeRayCastFunction());
    
    volumeMapper.SetInput(reader.GetOutput());

    // The volume holds the mapper and the property and
    // can be used to position/orient the volume
    vtkVolume volume = new vtkVolume();
    volume.SetMapper(volumeMapper);
    volume.SetProperty(volumeProperty);

    renWin.GetRenderer().AddVolume(volume);
    renWin.GetRenderer().SetBackground(1, 1, 1);

    JFrame frame = new JFrame("SimpleRayCast");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().add("Center", renWin);
    frame.pack();
    frame.setVisible(true);
 }


}