below is a program i am working on. it has a keynavigator and a switch
for LOD. but the assignment I need to do requires me to populate teh
scene with many of my Avatars. Once I put the switch in, I do not know
how to get other avatars in the scene. Also, I need to populate the
scene depending on a value passed in through the command line. I know
how pass in the value, how do I add avatars randomly like that, anyone?
Jerry
import com.sun.j3d.loaders.objectfile.ObjectFile;
import com.sun.j3d.loaders.ParsingErrorException;
import com.sun.j3d.loaders.IncorrectFormatException;
import com.sun.j3d.loaders.Scene;
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.event.*;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import java.io.*;
import com.sun.j3d.utils.behaviors.mouse.*;
import com.sun.j3d.utils.behaviors.keyboard.*;
import com.sun.j3d.utils.image.TextureLoader;
import com.sun.j3d.utils.geometry.*;
import Avatar;
public class AvatarClass extends Applet {
private boolean spin = false;
private boolean noTriangulate = false;
private boolean noStripify = false;
private double creaseAngle = 60.0;
private String filename = null;
public BranchGroup createSceneGraph(SimpleUniverse theUniv, String[]
args) {
// Create the root of the branch graph
BranchGroup objRoot = new BranchGroup();
// Create the transform group node and initialize it to the
// identity. Enable the TRANSFORM_WRITE capability so that
// our behavior code can modify it at runtime. Add it to the
// root of the subgraph.
TransformGroup objTrans = new TransformGroup();
objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
objRoot.addChild(objTrans);
BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0),
3000.0);
TransformGroup vpTrans =
theUniv.getViewingPlatform().getViewPlatformTransform();
KeyNavigatorBehavior keyNavigate = new
KeyNavigatorBehavior(vpTrans);
keyNavigate.setSchedulingBounds(new BoundingSphere(new
Point3d(),1000.0));
objTrans.addChild(keyNavigate);
//create a switch for the lod
Switch theSW = new Switch();
theSW.setCapability(javax.media.j3d.Switch.ALLOW_SWITCH_WRITE);
//create the different levels
theSW.addChild(new Avatar(objRoot,100));
theSW.addChild(new Avatar(objRoot,20));
theSW.addChild(new Avatar(objRoot,2));
objTrans.addChild(theSW);
//add distance lod
float[] distance = new float[2];
distance[0] = Float.parseFloat( args[0]);
distance[1] = Float.parseFloat(args[1]);
DistanceLOD theLOD = new DistanceLOD(distance);
theLOD.addSwitch(theSW);
theLOD.setSchedulingBounds(bounds);
objTrans.addChild(theLOD);
//test populate
Transform3D t3d = new Transform3D();
t3d.set(new Vector3f(0.6f, 0.0f, 0.0f));
TransformGroup tga = new TransformGroup(t3d);
objRoot.addChild(tga);
tga.addChild(new Sphere(.40f));
// Set up the background
//Color3f bgColor = new Color3f(0.05f, 0.05f, 0.5f);
Color3f bgColor = new Color3f(1f, 1f, 1f);
Background bgNode = new Background(bgColor);
bgNode.setApplicationBounds(bounds);
objRoot.addChild(bgNode);
// Set up the ambient light
Color3f ambientColor = new Color3f(0.1f, 0.1f, 0.1f);
AmbientLight ambientLightNode = new AmbientLight(ambientColor);
ambientLightNode.setInfluencingBounds(bounds);
objRoot.addChild(ambientLightNode);
// Set up the directional lights
Color3f light1Color = new Color3f(1.0f, 1.0f, 0.9f);
Vector3f light1Direction = new Vector3f(4.0f, -7.0f, -12.0f);
Color3f light2Color = new Color3f(0.3f, 0.3f, 0.4f);
Vector3f light2Direction = new Vector3f(-6.0f, -2.0f, -1.0f);
DirectionalLight light1
= new DirectionalLight(light1Color, light1Direction);
light1.setInfluencingBounds(bounds);
objRoot.addChild(light1);
DirectionalLight light2
= new DirectionalLight(light2Color, light2Direction);
light2.setInfluencingBounds(bounds);
objRoot.addChild(light2);
objRoot.compile();
return objRoot;
}
private void usage()
{
System.out.println(
"Usage: java ObjLoad [-s] [-n] [-t] [-c degrees] <.obj file>");
System.out.println(" -s Spin (no user interaction)");
System.out.println(" -n No triangulation");
System.out.println(" -t No stripification");
System.out.println(
" -c Set crease angle for normal generation (default is 60 without");
System.out.println(
" smoothing group info, otherwise 180 within smoothing groups)");
System.exit(0);
} // End of usage
public AvatarClass(String args[]) {
setLayout(new BorderLayout());
Canvas3D c = new Canvas3D(null);
add("Center", c);
// Create a simple scene and attach it to the virtual universe
SimpleUniverse u = new SimpleUniverse(c);
BranchGroup scene = createSceneGraph(u, args);
// This will move the ViewPlatform back a bit so the
// objects in the scene can be viewed.
u.getViewingPlatform().setNominalViewingTransform();
u.addBranchGraph(scene);
}
//
// The following allows ObjLoad to be run as an application
// as well as an applet
//
public static void main(String[] args) {
new MainFrame(new AvatarClass(args), 400, 400);
}
}
--
J. Stone
[EMAIL PROTECTED]
http://www.DevilInBlue.org
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