point3d1.java

Java 多媒体技术(附源码) Java 3D API JavaSound API 各种格式的多媒体数据文件 JBuilder开发环境

package point3d1;

import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
import java.awt.BorderLayout;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
/**
 * <p>Title: 输出显示三维点</p>
 * <p>Description: 应用Java 3D API生成三维点</p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: 北京师范大学计算机系</p>
 * @author 王大伟
 * @version 1.0
 */

public class Point3D1 extends Applet {
  boolean isStandalone = false;
   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,2.0f,
        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(20.0f);
           pa.setPointAntialiasingEnable(true);
          //加了这一行，点的显示效果为圆形，不加为正方形
         Appearance ap = new Appearance();
         ap.setPointAttributes(pa);
          shape.setGeometry(point);
        shape.setAppearance(ap);
        objRoot.addChild(shape);
        objRoot.compile();
        return objRoot;
    }
     public Point3D1() {
        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) {
    Point3D1 applet = new Point3D1();
    applet.isStandalone = true;
    Frame frame;
    frame = new Frame() {
      protected void processWindowEvent(WindowEvent e) {
        super.processWindowEvent(e);
        if (e.getID() == WindowEvent.WINDOW_CLOSING) {
          System.exit(0);
        }
      }
      public synchronized void setTitle(String title) {
        super.setTitle(title);
        enableEvents(AWTEvent.WINDOW_EVENT_MASK);
      }
    };
    frame.setTitle("显示应用Java 3D API生成的三维点");
    frame.add(applet, BorderLayout.CENTER);
    applet.init();
    applet.start();
    frame.setSize(400,320);
    Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
    frame.setLocation((d.width - frame.getSize().width) / 2, (d.height - frame.getSize().height) / 2);
    frame.setVisible(true);
  }
}