Adding a texture to a box..

This was working at one point, but i dont know what is wrong
URL r = null;
          try {
               r = new URL("file:ground.png");
          } catch (MalformedURLException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          Texture tex = new TextureLoader(r, "LUMINANCE", this).getTexture();
          app.setTexture(tex);
          TextureAttributes texAttr = new TextureAttributes();
          texAttr.setTextureMode(TextureAttributes.MODULATE);
          app.setTextureAttributes(texAttr);I keep getting a nullPointerException.. and it says it cant find the file when it is right there next to the .class. Help?
and app was declared static so it isnt there next to the contents.
Thanks.
Edited by: newber on Jul 8, 2008 2:01 PM

Hi, I'm new to Java 3D and I'm not sure what the problem is, but check the file name and make sure it's right. maybe .png isn't supported. Or maybe you should say URL r = new URL(); and then re-instanitate it in the try - catch block.

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hello guys I want to create a box with a texture of chess board on top of it, but the problem is that it loads just a dark blue colour surface instead of blue and white squares surface,feel free to check what I mean, here is what the program shows
http://img97.imageshack.us/i/checkes.png/
and here the original texture I want to put in the box
http://img266.imageshack.us/i/arizonae.jpg/
here also is my code
import com.sun.j3d.utils.behaviors.keyboard.KeyNavigatorBehavior;
import javax.media.j3d.Transform3D;
import javax.swing.JFrame;
import java.awt.*;
import javax.swing.*;
import javax.media.j3d.Canvas3D;
import com.sun.j3d.utils.universe.SimpleUniverse;
import javax.media.j3d.BranchGroup;
import com.sun.j3d.utils.geometry.Box;
import com.sun.j3d.utils.image.TextureLoader;
import javax.vecmath.*;
import javax.media.j3d.DirectionalLight;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.Appearance;
import javax.media.j3d.ImageComponent2D;
import javax.media.j3d.Material;
import javax.media.j3d.Texture;
import javax.media.j3d.Texture2D;
import javax.media.j3d.TransformGroup;
import com.sun.j3d.utils.behaviors.mouse.*;
public class vrlm extends JFrame {
* The SimpleUniverse object
protected SimpleUniverse simpleU;
* The root BranchGroup Object.
protected BranchGroup rootBranchGroup;
* Constructor that consturcts the window with the given name.
* @param name
* The name of the window, in String format
public vrlm(String name) {
// The next line will construct the window and name it
// with the given name
super(name);
// Perform the initial setup, just once
initial_setup();
* Perform the essential setups for the Java3D
protected void initial_setup() {
// A JFrame is a Container -- something that can hold
// other things, e.g a button, a textfield, etc..
// however, for a container to hold something, you need
// to specify the layout of the storage. For our
// example, we would like to use a BorderLayout.
// The next line does just this:
getContentPane().setLayout(new BorderLayout());
// The next step is to setup graphics configuration
// for Java3D. Since different machines/OS have differnt
// configuration for displaying stuff, therefore, for
// java3D to work, it is important to obtain the correct
// graphics configuration first.
GraphicsConfiguration config = SimpleUniverse
.getPreferredConfiguration();
// construct the canvas.
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// window..
getContentPane().add("Center", canvas3D);
// Creates the universe
simpleU = new SimpleUniverse(canvas3D);
// First create the BranchGroup object
rootBranchGroup = new BranchGroup();
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* @param direction
* The inverse direction of the light
* @param color
* The color of the light
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// direction and color
DirectionalLight lightD = new DirectionalLight(color, direction);
lightD.setInfluencingBounds(bounds);
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rootBranchGroup.addChild(lightD);
* Adds a box to the universe
* @param x
* x dimension of the box
* @param y
* y dimension of the box
* @param z
* z dimension of the box
Appearance vasixrwma(){
     Appearance vasixrwmaa = new Appearance();
//load the texture
     String filename = "C:/Documents and Settings/Andy/Desktop/Arizona.jpg";
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ImageComponent2D image = loader.getImage();
if(image == null) {
System.out.println("load failed for texture: "+filename);
Texture2D texture = new Texture2D(Texture.BASE_LEVEL, Texture.RGBA,
image.getWidth(), image.getHeight());
texture.setEnable(true);
texture.setImage(0, image);
texture.setMagFilter(Texture.BASE_LEVEL_LINEAR);
texture.setMinFilter(Texture.BASE_LEVEL_LINEAR);
vasixrwmaa.setTexture(texture);
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public void addBox(float x, float y, float z, Color3f diffuse, Color3f spec, float a, float b, float c) {
// Add a box with the given dimension
// First setup an appearance for the box
Appearance app = new Appearance();
Material mat = new Material();
mat.setDiffuseColor(diffuse);
mat.setSpecularColor(spec);
mat.setShininess(5.0f);
app.setMaterial(mat);
Box box = new Box(x, y, z, app);
// Create a TransformGroup and make it the parent of the box
Transform3D meros = new Transform3D();
meros.setTranslation(new Vector3d(a, b, c));
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Appearance appear = vasixrwma();
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rootBranchGroup.addChild(tg);
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tg.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
tg.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
MouseRotate myMouseRotate = new MouseRotate();
myMouseRotate.setTransformGroup(tg);
myMouseRotate.setSchedulingBounds(new BoundingSphere());
rootBranchGroup.addChild(myMouseRotate);
MouseTranslate myMouseTranslate = new MouseTranslate();
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myMouseTranslate.setSchedulingBounds(new BoundingSphere());
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public void finalise() {
// Then add the branch group into the Universe
simpleU.addBranchGraph(rootBranchGroup);
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simpleU.getViewingPlatform().setNominalViewingTransform();
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bc.setSize(250, 250);
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