Hi,
I try to add a MouseTranslate Behavior in a scene, where the view branch
graph is not created using SimpleUniverse.
The program teminates with the following exception:
java.lang.NullPointerException
at
javax.media.j3d.BehaviorRetained.updateTransformRegion(BehaviorRetained.java:458)
at
javax.media.j3d.BehaviorStructure.activateBehaviors(BehaviorStructure.java:347)
at
javax.media.j3d.BehaviorStructure.processMessages(BehaviorStructure.java:209)
at
javax.media.j3d.StructureUpdateThread.doWork(StructureUpdateThread.java:83)
at javax.media.j3d.J3dThread.run(J3dThread.java:250)
That somewhere in Java3D and means nothing to me?
What am I doing wrong?
A testcase is attached.
Outcommenting of the line
world_object_group.addChild(trans);
leads to a running programm, ofcourse without behavior.
Desiree
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Desiree Hilbring
Institut fuer Photogrammetrie und Fernerkundung
Universitaet Karlsruhe, Germany
email: [EMAIL PROTECTED]
# 0721 6083676
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/*****************************************************************************
* J3D.org Copyright (c) 2000
* Java Source
*
* This source is licensed under the GNU LGPL v2.1
* Please read http://www.gnu.org/copyleft/lgpl.html for more information
*
* This software comes with the standard NO WARRANTY disclaimer for any
* purpose. Use it at your own risk. If there's a problem you get to fix it.
*
****************************************************************************/
// Standard imports
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.HashMap;
import com.sun.j3d.utils.behaviors.mouse.*;
import com.sun.j3d.utils.geometry.ColorCube;
public class NavTest extends DemoFrameDesTest
{
// Achtung front und back hardcodiert
private static final double BACK_CLIP_DISTANCE = 3000.0;
private static final double FRONT_CLIP_DISTANCE = 1;
/** The main canvas that we are navigating on */
private Canvas3D navCanvas;
/** Global material instance to use */
private Material material;
/** Global polygon attributes to use */
private PolygonAttributes polyAttr;
/** TG that holds the user view position. Used when new terrain set */
private TransformGroup gndViewTransform;
/** The color interpolator for doing height interpolations with */
//private ColorInterpolator heightRamp;
/**
* Construct a new demo with no geometry currently showing, but the
* default type is set to quads.
*/
public NavTest()
{
super("NavTest");
navCanvas = createCanvas();
Panel p0 = new Panel(new GridLayout(1, 2));
p0.add(navCanvas);
add(p0, BorderLayout.CENTER);
JPanel p1 = new JPanel(new FlowLayout());
buildScene();
// Now set up the material and appearance handling for the generator
material = new Material();
material.setLightingEnable(true);
polyAttr = new PolygonAttributes();
polyAttr.setCapability(PolygonAttributes.ALLOW_MODE_WRITE);
polyAttr.setCullFace(PolygonAttributes.CULL_NONE);
polyAttr.setBackFaceNormalFlip(true);
polyAttr.setPolygonMode(PolygonAttributes.POLYGON_FILL);
loadTerrain(new String(),new String());
}
//----------------------------------------------------------
// Internal convenience methods
//----------------------------------------------------------
/**
* Build the scenegraph for the canvas
*/
private void buildScene()
{
Color3f ambientBlue = new Color3f(0.0f, 0.02f, 0.5f);
Color3f white = new Color3f(1, 1, 1);
Color3f black = new Color3f(0.0f, 0.0f, 0.0f);
Color3f blue = new Color3f(0.00f, 0.20f, 0.80f);
Color3f specular = new Color3f(0.7f, 0.7f, 0.7f);
VirtualUniverse universe = new VirtualUniverse();
Locale locale = new Locale(universe);
BranchGroup view_group = new BranchGroup();
BranchGroup world_object_group = new BranchGroup();
PhysicalBody body = new PhysicalBody();
PhysicalEnvironment env = new PhysicalEnvironment();
Point3d origin = new Point3d(0, 0, 0);
BoundingSphere light_bounds =
new BoundingSphere(origin, BACK_CLIP_DISTANCE);
DirectionalLight headlight = new DirectionalLight();
headlight.setColor(white);
headlight.setInfluencingBounds(light_bounds);
headlight.setEnable(true);
ViewPlatform gnd_camera = new ViewPlatform();
Transform3D angle = new Transform3D();
gndViewTransform = new TransformGroup();
gndViewTransform.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
gndViewTransform.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
gndViewTransform.addChild(gnd_camera);
gndViewTransform.addChild(headlight);
View gnd_view = new View();
gnd_view.setBackClipDistance(BACK_CLIP_DISTANCE);
gnd_view.setFrontClipDistance(FRONT_CLIP_DISTANCE);
gnd_view.setPhysicalBody(body);
gnd_view.setPhysicalEnvironment(env);
gnd_view.addCanvas3D(navCanvas);
gnd_view.attachViewPlatform(gnd_camera);
//System.out.println("front clip dist "+gnd_view.getFrontClipDistance());
//System.out.println("back clip dist "+gnd_view.getBackClipDistance());
view_group.addChild(gndViewTransform);
TransformGroup testBoxTG = new TransformGroup();
Transform3D testBoxT3d = new Transform3D();
testBoxT3d.setTranslation(new Vector3f(50,3510,-50));
testBoxTG.setTransform(testBoxT3d);
testBoxTG.addChild(new ColorCube(10));
world_object_group.addChild(testBoxTG);
BoundingSphere mouseBounds = new BoundingSphere(new
Point3d(),Float.MAX_VALUE);
BoundingLeaf boundingLeaf = new BoundingLeaf(mouseBounds);
/*
ViewerNavigationBehavior rotate = new
ViewerNavigationBehavior(gndViewTransform,gnd_view);
rotate.setSchedulingBoundingLeaf(boundingLeaf);
*/
MouseTranslate trans = new MouseTranslate(MouseBehavior.INVERT_INPUT);
trans.setTransformGroup(gndViewTransform);
trans.setSchedulingBoundingLeaf(boundingLeaf);
/*
WorldVolume wv = new WorldVolume();
MouseZoomAdjustView zoom = new
MouseZoomAdjustView(MouseBehavior.INVERT_INPUT,gnd_view,wv);
zoom.setTransformGroup(gndViewTransform);
zoom.setSchedulingBoundingLeaf(boundingLeaf);
*/
//world_object_group.addChild(rotate);
world_object_group.addChild(trans);
//world_object_group.addChild(zoom);
// Add everything to the locale
locale.addBranchGraph(view_group);
locale.addBranchGraph(world_object_group);
}
/**
* Load the terrain and get it read to roll. If the texture file is not
* specified then no texture will be loaded and colour information is
* used instead.
*
* @param filename The name of the terrain file
* @param textureName The name of the texture file, or null
*/
private void loadTerrain(String filename, String textureName)
{
//System.gc();
System.out.println("Loading terrain file. Please wait!!!!!!!!!!!!!!!!!!!!");
Point3d p3dmin = new Point3d();
Point3d p3dmax = new Point3d();
float[] origin = new float[3];
//terrain.getCoordinate(origin, 1, 1);
origin[0]=50;
origin[1]=3500;
origin[2]=-50;
System.out.println("origin[] "+origin[0]+" "+origin[1]+" "+origin[2]);
Transform3D angle = new Transform3D();
// setup the top view by just raising it some amount and we want
Vector3f pos = new Vector3f();
pos.x = origin[0];
pos.y = origin[1];
pos.z = origin[2]+100;
angle.setTranslation(pos);
System.out.println("Building landscape 3");
gndViewTransform.setTransform(angle);
System.out.println("Building landscape 4");
/*
Matrix3f mtx = new Matrix3f();
Vector3f orient = new Vector3f(0, 0, -1);
angle.get(mtx, pos);
mtx.transform(orient);
*/
}
public static void main(String[] argv)
{
NavTest demo = new NavTest();
demo.setSize(600, 400);
demo.setVisible(true);
}
}
/*****************************************************************************
* J3D.org Copyright (c) 2000
* Java Source
*
* This source is licensed under the GNU LGPL v2.1
* Please read http://www.gnu.org/copyleft/lgpl.html for more information
*
* This software comes with the standard NO WARRANTY disclaimer for any
* purpose. Use it at your own risk. If there's a problem you get to fix it.
*
****************************************************************************/
// Standard imports
import java.awt.*;
import java.awt.event.*;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.GraphicsConfigTemplate3D;
// Application Specific imports
// none
/**
* Demonstration of a mouse navigation in a world.
*
* @author Justin Couch
* @version $Revision: 1.1 $
*/
public class DemoFrameDesTest extends Frame implements WindowListener
{
public DemoFrameDesTest(String title)
{
super(title);
setLocation(30, 10);
addWindowListener(this);
}
/**
* Creates a new canvas each time this is called.
*
* @return A new canvas instance
*/
protected Canvas3D createCanvas()
{
Canvas3D canvas;
GraphicsConfigTemplate3D template = new GraphicsConfigTemplate3D();
template.setDoubleBuffer(template.REQUIRED);
GraphicsEnvironment env =
GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice dev = env.getDefaultScreenDevice();
//System.out.println("env "+env.toString());
//System.out.println("dev "+dev.toString());
//System.out.println("template "+template.toString());
canvas = new Canvas3D(dev.getBestConfiguration(template));
canvas.setStereoEnable(false);
canvas.setDoubleBufferEnable(true);
//canvas.setDoubleBufferEnable(false);
System.out.println("Canvas "+canvas);
return canvas;
}
/**
* Ignored
*/
public void windowActivated(WindowEvent evt)
{
}
/**
* Ignored
*/
public void windowClosed(WindowEvent evt)
{
}
/**
* Exit the application
*
* @param evt The event that caused this method to be called.
*/
public void windowClosing(WindowEvent evt)
{
System.exit(0);
}
/**
* Ignored
*/
public void windowDeactivated(WindowEvent evt)
{
}
/**
* Ignored
*/
public void windowDeiconified(WindowEvent evt)
{
}
/**
* Ignored
*/
public void windowIconified(WindowEvent evt)
{
}
/**
* Ignored
*/
public void windowOpened(WindowEvent evt)
{
}
}
