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Java 3d - moveable grid by mouse

Posted on 2004-11-24
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Last Modified: 2009-07-29
Hi, can anyone help?

I am trying to write a program in java that requires a 3D grid to be rotated about all three axes using the mouse - and the ability to scroll and pan.

Would anyone know how to go about this? It just needs to be a simple grid.

Thanks in advance....
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Question by:bexMarriott
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by:shah1d1698
ID: 12671800
Are you making the geometry of the 3d grid by yourself( i mean manually drawing lines in a 3d space) or importing contents from a .obj file created by Maya???

Whatever ur method is, I think it will help you a lot if you go through the the tutorial for java3d from http://java.sun.com/products/java-media/3D/collateral/

Download 7 chapters from the site and go through them.....it's easy and fun....

Specially
Chapter 2, (Creating Content)
Chapter 3, (Easier Content Creation)
Chapter 4, (Interaction)
will help u do your job.
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shah1d1698 earned 375 total points
ID: 12671847
Once I tried to navigate through a 3d grid and to rotate it with mouse. I built the 3d grid by drawing lines in the 3d space. I used the KeyNavigatorBehavior class to navigate through that 3d grid.

My code looked something like....
(You may need to modify the following code to meet your needs. But I suggest u first compile & run it.)

import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Frame;
import java.awt.GraphicsConfiguration;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;

import java.awt.event.*;
import java.awt.AWTEvent;
import java.util.Enumeration;
import com.sun.j3d.utils.behaviors.keyboard.*;
import com.sun.j3d.utils.behaviors.mouse.*;

public class KeyNav1 extends Applet
{

  public KeyNav1()
  {
    setLayout(new BorderLayout());
    GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();
    Canvas3D canvas = new Canvas3D(config);
    add("Center", canvas);


    SimpleUniverse su = new SimpleUniverse(canvas);
    BranchGroup scene = createSceneGraph(su);
    scene.compile();
    //su.getViewingPlatform().setNominalViewingTransform();
    su.addBranchGraph(scene);
  }

  public BranchGroup createSceneGraph(SimpleUniverse su)
  {
    BranchGroup objRoot = new BranchGroup();
    Geometry geo = createGeometry();
    Appearance app = new Appearance();
    ColoringAttributes ca = new ColoringAttributes();
    ca.setColor(0.0f, 0.0f, 1.0f);
    app.setColoringAttributes(ca);

    Shape3D shape = new Shape3D(geo, app);
    TransformGroup tg1 = new TransformGroup();
    tg1.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
    tg1.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    tg1.addChild(shape);

    objRoot.addChild(tg1);
    MouseRotate rotate = new MouseRotate();
    rotate.setTransformGroup(tg1);
    rotate.setSchedulingBounds(new BoundingSphere());

    objRoot.addChild(rotate);


    Background bkg = new Background();
    bkg.setApplicationBounds(new BoundingSphere());
    bkg.setColor(1.0f, 1.0f, 1.0f);
    objRoot.addChild(bkg);

    TransformGroup tg = null;
    Transform3D translate = new Transform3D();
    translate.setTranslation(new Vector3f(0.0f, 0.3f, 0.0f));
    tg = su.getViewingPlatform().getViewPlatformTransform();
    tg.setTransform(translate);

    KeyNavigatorBehavior knb = new KeyNavigatorBehavior(tg);
    knb.setSchedulingBounds(new BoundingSphere(new Point3d(0.0d, 0.0d, 0.0d), 1000.0d));
    objRoot.addChild(knb);

    return objRoot;
  }

  public Geometry createGeometry()
  {
    LineArray line = new LineArray(54,LineArray.COORDINATES);
    line.setCoordinate(0, new Point3f(5.0f, 0.0f, 0.0f));
    line.setCoordinate(1, new Point3f(-5.0f, 0.0f, 0.0f));
    line.setCoordinate(2, new Point3f(0.0f, 5.0f, 0.0f));
    line.setCoordinate(3, new Point3f(0.0f, -5.0f, 0.0f));
    line.setCoordinate(4, new Point3f(0.0f, 0.0f, 5.0f));
    line.setCoordinate(5, new Point3f(0.0f, 0.0f, -5.0f));
    line.setCoordinate(6, new Point3f(0.1f, 0.0f, 5.0f));
    line.setCoordinate(7, new Point3f(0.1f, 0.0f, -5.0f));
    line.setCoordinate(8, new Point3f(0.2f, 0.0f, 5.0f));
    line.setCoordinate(9, new Point3f(0.2f, 0.0f, -5.0f));
    line.setCoordinate(10, new Point3f(0.3f, 0.0f, 5.0f));
    line.setCoordinate(11, new Point3f(0.3f, 0.0f, -5.0f));
    line.setCoordinate(12, new Point3f(0.4f, 0.0f, 5.0f));
    line.setCoordinate(13, new Point3f(0.4f, 0.0f, -5.0f));
    line.setCoordinate(14, new Point3f(0.5f, 0.0f, 5.0f));
    line.setCoordinate(15, new Point3f(0.5f, 0.0f, -5.0f));
    line.setCoordinate(16, new Point3f(0.6f, 0.0f, 5.0f));
    line.setCoordinate(17, new Point3f(0.6f, 0.0f, -5.0f));
    line.setCoordinate(18, new Point3f(-0.1f, 0.0f, 5.0f));
    line.setCoordinate(19, new Point3f(-0.1f, 0.0f, -5.0f));
    line.setCoordinate(20, new Point3f(-0.2f, 0.0f, 5.0f));
    line.setCoordinate(21, new Point3f(-0.2f, 0.0f, -5.0f));
    line.setCoordinate(22, new Point3f(-0.3f, 0.0f, 5.0f));
    line.setCoordinate(23, new Point3f(-0.3f, 0.0f, -5.0f));
    line.setCoordinate(24, new Point3f(-0.4f, 0.0f, 5.0f));
    line.setCoordinate(25, new Point3f(-0.4f, 0.0f, -5.0f));
    line.setCoordinate(26, new Point3f(-0.5f, 0.0f, 5.0f));
    line.setCoordinate(27, new Point3f(-0.5f, 0.0f, -5.0f));
    line.setCoordinate(28, new Point3f(-0.6f, 0.0f, 5.0f));
    line.setCoordinate(29, new Point3f(-0.6f, 0.0f, -5.0f));

    line.setCoordinate(30, new Point3f(5.0f, 0.0f, -0.1f));
    line.setCoordinate(31, new Point3f(-5.0f, 0.0f, -0.1f));
    line.setCoordinate(32, new Point3f(5.0f, 0.0f, -0.2f));
    line.setCoordinate(33, new Point3f(-5.0f, 0.0f, -0.2f));
    line.setCoordinate(34, new Point3f(5.0f, 0.0f, -0.3f));
    line.setCoordinate(35, new Point3f(-5.0f, 0.0f, -0.3f));
    line.setCoordinate(36, new Point3f(5.0f, 0.0f, -0.4f));
    line.setCoordinate(37, new Point3f(-5.0f, 0.0f, -0.4f));
    line.setCoordinate(38, new Point3f(5.0f, 0.0f, -0.5f));
    line.setCoordinate(39, new Point3f(-5.0f, 0.0f, -0.5f));
    line.setCoordinate(40, new Point3f(5.0f, 0.0f, -0.6f));
    line.setCoordinate(41, new Point3f(-5.0f, 0.0f, -0.6f));

    line.setCoordinate(42, new Point3f(5.0f, 0.0f, 0.1f));
    line.setCoordinate(43, new Point3f(-5.0f, 0.0f, 0.1f));
    line.setCoordinate(44, new Point3f(5.0f, 0.0f, 0.2f));
    line.setCoordinate(45, new Point3f(-5.0f, 0.0f, 0.2f));
    line.setCoordinate(46, new Point3f(5.0f, 0.0f, 0.3f));
    line.setCoordinate(47, new Point3f(-5.0f, 0.0f, 0.3f));
    line.setCoordinate(48, new Point3f(5.0f, 0.0f, 0.4f));
    line.setCoordinate(49, new Point3f(-5.0f, 0.0f, 0.4f));
    line.setCoordinate(50, new Point3f(5.0f, 0.0f, 0.5f));
    line.setCoordinate(51, new Point3f(-5.0f, 0.0f, 0.5f));
    line.setCoordinate(52, new Point3f(5.0f, 0.0f, 0.6f));
    line.setCoordinate(53, new Point3f(-5.0f, 0.0f, 0.6f));

    return line;
  }

  public static void main(String args[])
  {
    Frame frame = new MainFrame(new KeyNav1(), 500, 500);
  }

}
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