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KF · Guest

Hi,

Urgent, can anybody help me, please.
i can display the wrl file in applet itself but i can't display in the
browser.is it any problem with the coding? pls correct me. Thanks.

here is the sample coding :

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.behaviors.mouse.MouseRotate;
import com.sun.j3d.utils.behaviors.mouse.MouseZoom;
import com.sun.j3d.utils.behaviors.mouse.MouseTranslate;
import javax.media.j3d.*;
import javax.vecmath.*;
import java.net.URL;
import java.net.MalformedURLException;
import org.web3d.j3d.loaders.VRML97Loader;
import com.sun.j3d.loaders.Scene;

public class SimpleVrml extends Applet implements ActionListener {

String location;
String initLocation;
Canvas3D canvas;
SimpleUniverse universe;
TransformGroup vpTransGroup;
VRML97Loader loader;
View view;
Panel panel;
Label label;
BranchGroup sceneRoot;
TransformGroup examineGroup;
BranchGroup sceneGroup;
BoundingSphere sceneBounds;
DirectionalLight headLight;
AmbientLight ambLight;
TextField textField;
Cursor waitCursor;
Cursor handCursor;

public SimpleVrml() {
initLocation="cylinder.wrl";
setLayout(new BorderLayout());
GraphicsConfiguration config
=SimpleUniverse.getPreferredConfiguration();
setLayout(new BorderLayout());
canvas = new Canvas3D(config);
add("Center",canvas);

panel = new Panel();
panel.setLayout(new FlowLayout(FlowLayout.LEFT));
textField = new TextField(initLocation,60);
textField.addActionListener(this);
label = new Label("Location:");
panel.add(label);
panel.add(textField);
add("North",panel);

waitCursor = new Cursor(Cursor.WAIT_CURSOR);
handCursor = new Cursor(Cursor.HAND_CURSOR);

universe = new SimpleUniverse(canvas);
ViewingPlatform viewingPlatform = universe.getViewingPlatform();
vpTransGroup = viewingPlatform.getViewPlatformTransform();
Viewer viewer = universe.getViewer();
view = viewer.getView();

setupBehavior();

loader = new VRML97Loader();

gotoLocation(initLocation);

}

public void actionPerformed(ActionEvent ae) {
gotoLocation(textField.getText());
}

void gotoLocation(String location) {

canvas.setCursor(waitCursor);

if (sceneGroup != null) {
sceneGroup.detach();
}
Scene scene = null;
try {
URL loadUrl = new URL(location);
try {
// load the scene
scene = loader.load(new URL(location));
} catch (Exception e) {
System.out.println("Exception loading URL:" + e);
}
} catch (MalformedURLException badUrl) {
// location may be a path name
try {
// load the scene
scene = loader.load(location);
} catch (Exception e) {
System.out.println("Exception loading file from path:" + e);
}
}
if (scene != null) {
// get the scene group
sceneGroup = scene.getSceneGroup();
sceneGroup.setCapability(BranchGroup.ALLOW_DETACH);
sceneGroup.setCapability(BranchGroup.ALLOW_BOUNDS_READ);

// add the scene group to the scene
examineGroup.addChild(sceneGroup);

// now that the scene group is "live" we can inquire the bounds
sceneBounds = (BoundingSphere)sceneGroup.getBounds();

// set up a viewpoint to include the bounds
setViewpoint();
}

canvas.setCursor(handCursor);
}

void setViewpoint() {
Transform3D viewTrans = new Transform3D();
Transform3D eyeTrans = new Transform3D();

// point the view at the center of the object
Point3d center = new Point3d();
sceneBounds.getCenter(center);
double radius = sceneBounds.getRadius();
Vector3d temp = new Vector3d(center);
viewTrans.set(temp);

// pull the eye back far enough to see the whole object
double eyeDist = 1.4*radius / Math.tan(view.getFieldOfView() / 2.0);
temp.x = 0.0;
temp.y = 0.0;
temp.z = eyeDist;
eyeTrans.set(temp);
viewTrans.mul(eyeTrans);

// set the view transform
vpTransGroup.setTransform(viewTrans);
}

private void setupBehavior() {
sceneRoot = new BranchGroup();

examineGroup = new TransformGroup();
examineGroup.setCapability(TransformGroup.ALLOW_CHILDREN_EXTEND);
examineGroup.setCapability(TransformGroup.ALLOW_CHILDREN_READ);
examineGroup.setCapability(TransformGroup.ALLOW_CHILDREN_WRITE);
examineGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
examineGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
sceneRoot.addChild(examineGroup);

BoundingSphere behaviorBounds = new BoundingSphere(new Point3d(),
Double.MAX_VALUE);

MouseRotate mr = new MouseRotate();
mr.setTransformGroup(examineGroup);
mr.setSchedulingBounds(behaviorBounds);
sceneRoot.addChild(mr);

MouseTranslate mt = new MouseTranslate();
mt.setTransformGroup(examineGroup);
mt.setSchedulingBounds(behaviorBounds);
sceneRoot.addChild(mt);

MouseZoom mz = new MouseZoom();
mz.setTransformGroup(examineGroup);
mz.setSchedulingBounds(behaviorBounds);
sceneRoot.addChild(mz);

BoundingSphere lightBounds =
new BoundingSphere(new Point3d(), Double.MAX_VALUE);
ambLight = new AmbientLight(true, new Color3f(1.0f, 1.0f,
1.0f));
ambLight.setInfluencingBounds(lightBounds);
ambLight.setCapability(Light.ALLOW_STATE_WRITE);
sceneRoot.addChild(ambLight);
headLight = new DirectionalLight();
headLight.setCapability(Light.ALLOW_STATE_WRITE);
headLight.setInfluencingBounds(lightBounds);
sceneRoot.addChild(headLight);

universe.addBranchGraph(sceneRoot);
}

public static void main(String[] args) {

new MainFrame(new SimpleVrml(), 780, 780);
}

}

cylinder.wrl :

#VRML V2.0 utf8
# A cylinder
Shape {
appearance Appearance {
material Material { }
}
geometry Cylinder {
height 2.0
radius 1.5
}
}

view.html:

<html>
<applet code="SimpleVrml.class" width=600 height=600>
</applet>
</html>

error msg that i get :
Exception loading file from path:java.security.AccessControlException:
access denied (java.util.PropertyPermission user.dir read)