point5.java

Java3D 采用IndexedPointArray方法生成点。是Applet程序

//Point5.java
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.GraphicsConfiguration;

import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.*;

import javax.media.j3d.*;
import javax.vecmath.*;

public class Point5 extends Applet {
   private BranchGroup createSceneGraph() {
	BranchGroup objRoot = new BranchGroup();
        objRoot.addChild(createObject());
	objRoot.compile();
	return objRoot;
    }

   private Group createObject() {
	Transform3D t = new Transform3D();
	TransformGroup objTrans = new TransformGroup(t);
       objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
     Shape3D shape = new pointShape();
	objTrans.addChild(shape);

     Transform3D yAxis = new Transform3D();
     Alpha rotationAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE,
                                        0, 0, 4000, 0, 0, 0, 0, 0);
     RotationInterpolator rotator = new RotationInterpolator(rotationAlpha, 
                              objTrans, yAxis, 0.0f, (float) Math.PI*2.0f);
     BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0), 50.0);
     rotator.setSchedulingBounds(bounds);
     objTrans.addChild(rotator);
	return objTrans;
    }

    public Point5() {
	  setLayout(new BorderLayout());
	  GraphicsConfiguration config=SimpleUniverse.getPreferredConfiguration();
      Canvas3D c=new Canvas3D(config);
	  add("Center", c);
	  BranchGroup scene = createSceneGraph();
	  SimpleUniverse u = new SimpleUniverse(c);
       u.getViewingPlatform().setNominalViewingTransform();
       u.addBranchGraph(scene);
    }

    public static void main(String[] args) {
        new MainFrame(new Point5(), 400,400);
    }
}
//end of Point5.java