bouncingball.java

使用java3d进行,obj文件的加载.和实现全方位的3维场景交互

package csu.chailei.test;

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.awt.event.WindowAdapter;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import com.sun.j3d.utils.geometry.Sphere;
import javax.swing.Timer;

public class BouncingBall extends Applet implements ActionListener, KeyListener {
	private Button go = new Button("Go");
	private Button test=new Button("你好");
	private TransformGroup objTrans;
	private Transform3D trans = new Transform3D();
	private float height = 0.0f;
	private float sign = 1.0f; // going up or down
	private Timer timer;
	private float xloc = 0.0f;

	public BranchGroup createSceneGraph() {
		// 创建分支图的根
		BranchGroup objRoot = new BranchGroup();
		objTrans = new TransformGroup();
		objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
		objRoot.addChild(objTrans);

		// 创建一个简单图形叶子节点，添加到场景图。
		Sphere sphere = new Sphere(0.25f);
		objTrans = new TransformGroup();
		objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
		Transform3D pos1 = new Transform3D();
		pos1.setTranslation(new Vector3f(0.0f, 0.0f, 0.0f));
		objTrans.setTransform(pos1);
		objTrans.addChild(sphere);
		objRoot.addChild(objTrans);
		BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
				100.0);

		Color3f light1Color = new Color3f(1.0f, 0.0f, 0.2f);
		Vector3f light1Direction = new Vector3f(4.0f, -7.0f, -12.0f);
		DirectionalLight light1 = new DirectionalLight(light1Color,
				light1Direction);
		light1.setInfluencingBounds(bounds);
		objRoot.addChild(light1);

		// 设置环境光
		Color3f ambientColor = new Color3f(1.0f, 1.0f, 1.0f);
		AmbientLight ambientLightNode = new AmbientLight(ambientColor);
		ambientLightNode.setInfluencingBounds(bounds);
		objRoot.addChild(ambientLightNode);

		return objRoot;
	}

	public BouncingBall() {
		setLayout(new BorderLayout());
		GraphicsConfiguration config = SimpleUniverse
				.getPreferredConfiguration();
		Canvas3D c = new Canvas3D(config);
		//add("North",new Label("你好"));
		add("Center", c);
		add("South",new TextField("天上人间"));
		c.addKeyListener(this);
		timer = new Timer(100, this);
		// timer.start();
		Panel p = new Panel();
		p.add(go);
		p.add(test);
		add("North", p);
		go.addActionListener(this);
		go.addKeyListener(this);
		// 创建一个简单场景附加到虚拟宇宙
		BranchGroup scene = createSceneGraph();

		SimpleUniverse u = new SimpleUniverse(c);
		u.getViewingPlatform().setNominalViewingTransform();
		u.addBranchGraph(scene);
	}

	public void keyPressed(KeyEvent e) {
		// 按键被按下时调用
		if (e.getKeyChar() == 's') {
			xloc = xloc + .1f;
		}
		if (e.getKeyChar() == 'a') {
			xloc = xloc - .1f;
		}
	}

	public void keyReleased(KeyEvent e) {
		// 按键放开是被调用
	}

	public void keyTyped(KeyEvent e) {
		// 按一个键时调用
	}

	public void actionPerformed(ActionEvent e) {
		// 按钮按下时启动计时器
		if (e.getSource() == go) {
			if (!timer.isRunning()) {
				timer.start();
			}
		} else {
			height += .1 * sign;
			if (Math.abs(height * 2) >= 1)
				sign = -1.0f * sign;
			if (height < -0.4f) {
				trans.setScale(new Vector3d(1.0, .8, 1.0));
			} else {
				trans.setScale(new Vector3d(1.0, 1.0, 1.0));
			}
			trans.setTranslation(new Vector3f(xloc, height, 0.0f));
			objTrans.setTransform(trans);
		}
	}

	public static void main(String[] args) {
		System.out.println("Program Started");
		BouncingBall bb = new BouncingBall();
		bb.addKeyListener(bb);
		MainFrame mf = new MainFrame(bb, 256, 256);
	}
}