Hi Gianluca,
Tom is right that Java3D is not packaged with the major browsers (NS & IE).
You can enable Java3D with your browsers by installing the Java Plug-In
(http://java.sun.com/products/plugin/index.html), and configuring it to
set your browsers using a JVM where you have Java3D installed.
There are two issues with this approach, however. First, you must include
visad.jar in the archive tag of your HTML file, which means that the
browser must download 4 MB of Java code just to run your applet. Second,
anyone who wants to view your applet must also use the Java Plug-In to
enable Java3D for web browsers.
-Curtis
At 08:32 4/30/01, Tom Whittaker wrote:
>I wonder if part of the problem is that Java 3D is not supported by the Java
>Virtual Machine that runs under MSIExplorer?
>
>tom
>
>> Gianluca wrote:
>>
>> Hello VisAD List,
>>
>> My goad is to visualize a net-CDF file using an applet, and i tryed to
>> transform Simple example to an applet. My Kawa compile and run this file
>> successfully, but it don't run with IExplorer.
>>
>> Could everyone help me to solve this problem?
>> Thanks,
>> Gianluca
>>
>> ----------------sourcecode-------------------------------------------------
>> // import needed classes
>> import visad.*;
>> import visad.java3d.DisplayImplJ3D;
>> import visad.util.VisADSlider;
>> import visad.data.netcdf.Plain;
>> import java.rmi.RemoteException;
>> import java.io.IOException;
>> import java.awt.*;
>> import java.awt.event.*;
>> import javax.swing.*;
>> import java.applet.*;
>>
>> public class Simple extends Applet{
>>
>> // type 'java Simple' to run this application
>> public static void main(String args[])
>> throws VisADException, RemoteException, IOException {
>>
>> Simple SimpleIst = new Simple();
>>
>> // create a DataReference for an image
>> final DataReference image_ref = new DataReferenceImpl("image");
>>
>> // create a netCDF reader
>> Plain plain = new Plain();
>>
>> // open a netCDF file containing an image sequence and adapt
>> // it to a Field Data object
>> Field imagesNC = null;
>> try {
>> imagesNC = (Field) plain.open("images.nc");
>> }
>> catch (IOException exc) {
>> String s = "To run this example, the images.nc file must be "
>> +"present in\nyour visad/examples directory.";
>> System.out.println(s);
>> System.exit(0);
>> }
>> final Field image_sequence = imagesNC;
>>
>> // create a Display using Java3D
>> DisplayImpl display = new DisplayImplJ3D("image display");
>>
>> // extract the type of image and use
>> // it to determine how images are displayed
>> FunctionType image_sequence_type
>> (FunctionType) image_sequence.getType();
>> FunctionType image_type
>> (FunctionType) image_sequence_type.getRange();
>> RealTupleType domain_type = image_type.getDomain();
>> // map image coordinates to display coordinates
>> display.addMap(new ScalarMap((RealType) domain_type.getComponent(0),
>> Display.XAxis));
>> display.addMap(new ScalarMap((RealType) domain_type.getComponent(1),
>> Display.YAxis));
>> // map image brightness values to RGB (default is grey scale)
>> display.addMap(new ScalarMap((RealType) image_type.getRange(),
>> Display.RGB));
>>
>> // link the Display to image_ref
>> // display will update whenever image changes
>> display.addReference(image_ref);
>>
>> // create a DataReference and RealType for an 'hour' value
>> final DataReference hour_ref = new DataReferenceImpl("hour");
>> RealType hour_type
>> (RealType) image_sequence_type.getDomain().getComponent(0);
>> // and link it to a slider
>> VisADSlider slider = new VisADSlider("hour", 0, 3, 0, 1.0,
>> hour_ref, hour_type);
>>
>> // create a Cell to extract an image at 'hour'
>> // (this is an anonymous inner class extending CellImpl)
>> Cell cell = new CellImpl() {
>> public void doAction() throws VisADException, RemoteException {
>> // extract image from sequence by evaluating image_sequence
>> // Field at 'hour' value
>> image_ref.setData(image_sequence.evaluate(
>> (Real) hour_ref.getData()));
>> }
>> };
>> // link cell to hour_ref to trigger doAction whenever
>> // 'hour' value changes
>> cell.addReference(hour_ref);
>>
>> // create JFrame (i.e., a window) for display and slider
>> JFrame frame = new JFrame("Simple VisAD Application");
>> frame.addWindowListener(new WindowAdapter() {
>> public void windowClosing(WindowEvent e) {System.exit(0);}
>> });
>>
>> // create JPanel in JFrame
>> JPanel panel = new JPanel();
>> panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
>> panel.setAlignmentY(JPanel.TOP_ALIGNMENT);
>> panel.setAlignmentX(JPanel.LEFT_ALIGNMENT);
>> frame.getContentPane().add(panel);
>>
>> // add slider and display to JPanel
>> panel.add(slider);
>> panel.add(display.getComponent());
>>
>> // set size of JFrame and make it visible
>> frame.setSize(500, 600);
>> frame.setVisible(true);
>> }
>> }
>
>--
>Tom Whittaker (tomw@xxxxxxxxxxxxx)
>University of Wisconsin-Madison
>Space Science and Engineering Center
>Phone/VoiceMail: 608/262-2759
>Fax: 608/262-5974
