Question about the program

[mingming88]

Hi
i try to run the program below, but i don't know why i can't run it.
There is something wrong with the import com.sun.j3d, how can i fix it?
Thank you

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;

import javax.media.j3d.*;
import javax.vecmath.*;

import com.sun.j3d.utils.applet.MainFrame;

import com.sun.j3d.loaders.objectfile.ObjectFile;
import com.sun.j3d.loaders.Scene;

import javax.swing.JFrame;
import javax.swing.WindowConstants;

/**
* Renders a 3D shape using a 3D rendering engine
* that was written from scratch using AWT for
* graphics operations.
*/
public class main extends JFrame
{
	private static int 				m_kWidth = 400;
	private static int 				m_kHeight = 400;
   
   private RenderingEngine			renderingEngine = new AwtRenderingEngine();
   private GeometryUpdater			geometryUpdater = new RotatingGeometryUpdater();
   private RenderingSurface		renderingSurface;

	public main( )
	{
   	// load the object file
		Scene scene = null;
		Shape3D shape = null;

		// read in the geometry information from the data file
		ObjectFile objFileloader = new ObjectFile( ObjectFile.RESIZE );

		try
		{
			scene = objFileloader.load( "hand1.obj" );
		}
		catch ( Exception e )
		{
			scene = null;
			System.err.println( e );
		}

		if( scene == null )
			System.exit( 1 );

		// retrieve the Shape3D object from the scene
		BranchGroup branchGroup = scene.getSceneGroup( );
		shape = (Shape3D) branchGroup.getChild( 0 );

       GeometryArray geometryArray = (GeometryArray) shape.getGeometry();
      
       // add the geometry to the rendering engine...       
       renderingEngine.addGeometry( geometryArray );
       
       // create a rendering surface and bind the rendering engine
       renderingSurface = new RenderingSurface( renderingEngine, geometryUpdater );
       
       // start the rendering surface and add it to the content panel
       renderingSurface.start();
       getContentPane().add( renderingSurface );
       
    	// disable automatic close support for Swing frame.
		setDefaultCloseOperation( WindowConstants.DO_NOTHING_ON_CLOSE );
			
		// adds the window listener
		addWindowListener( 
			new WindowAdapter()
			{
				// handles the system exit window message
				public void windowClosing( WindowEvent e )
				{
					System.exit( 0 );				
               }
			}
		);
	}
   
	public static void main( String[] args )
	{
		main main = new main();
		main.setTitle( "3D" );
		main.setSize( 300, 300 );
		main.setVisible( true );
	}
}

[wsaryada]

Do you have the required 3D library required by your program? I believe you can download it from the following link: Java SE Desktop Technologies - Java 3D API

[j2me64]

can you please post the file hand1.obj or the content of this file?

[mingming88]

Here is the hand1.obj.
i have added j3dtree.jar

[Tolls]

Hi
i try to run the program below, but i don't know why i can't run it.
There is something wrong with the import com.sun.j3d, how can i fix it?
Thank you

What error do you get?

Posting all the code is pointless without telling us what is actually going wrong.

[mingming88]

can't import these,
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.loaders.objectfile.ObjectFile;
import com.sun.j3d.loaders.Scene;

so the Scene and ObjectFile has error on it.
When i try to run the program, it show this message
Exception in thread "main" java.lang.Error: Unresolved compilation problem:
at main.main(main.java:115)

[Tolls]

And what is the unresolved compilation problem?

[wsaryada]

Hi,

Are you sure that the classes your are importing is in the j3dtree.jar? Because on my Java3D installation the classes is inside the j3dutils.jar.

[j2me64]

can't import these,
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.loaders.objectfile.ObjectFile;
import com.sun.j3d.loaders.Scene;

i've made a file main.java in eclipse and all imports were ok. but i got this errors:

RenderingEngine cannot be resolved to a type, same error for AwtRenderingEngine, RotatingGeometryUpdater and RenderingSurface. so, must these classes be implemented or can these classes be imported by a package?

[mingming88]

Yes, those classes are implemented. Maybe my java3D is not installed correctly. i will try again. Thank you for helping