import java.applet.Applet;
import java.awt.BorderLayout;
import com.sun.j3d.utils.applet.MainFrame;
import java.awt.GraphicsConfiguration;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
public class Point1 extends Applet {  
public BranchGroup createSceneGraph() {    
	BranchGroup objRoot = new BranchGroup();    
	float vert[] = {.8f, 0.8f,0.0f,-0.8f, 0.8f,0.0f,0.5f, 0.0f,0.0f, -0.5f, 0.0f,0.0f,-0.8f,-0.8f,0.0f,0.8f,-0.8f,0.0f,};    
	float color[] = {        0.0f,0.5f,1.0f,        0.5f,0.0f,1.0f,        0.0f,0.8f,0.2f,        1.0f,0.0f,0.3f,        0.0f,1.0f,0.3f,        0.3f,0.8f,0.0f,      };        
	Shape3D shape = new Shape3D();        
	PointArray point = new PointArray(6, PointArray.COORDINATES                |PointArray.COLOR_3);          
	point.setCoordinates(0,vert);          
	point.setColors(0,color);        
	PointAttributes pa = new PointAttributes();          
	pa.setPointSize(200000.0f);          
	pa.setPointAntialiasingEnable(true);                 //不加這一行，點的顯示效果為正方形                //加了這一行，點的顯示效果為圓形        
	Appearance ap = new Appearance();         
	ap.setPointAttributes(pa);
	shape.setGeometry(point);        
	objRoot.addChild(shape);        
	objRoot.compile();        
	return objRoot;    
}    
public Point1() {        
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 Point1(), 400,400);    }}