simplemousebhv.java

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//SimpleMouseBhv.java
//演示如何使用MouseBehavior对象
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Frame;
import com.sun.j3d.utils.applet.MainFrame; 
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.behaviors.mouse.*;
import javax.media.j3d.*;
import javax.vecmath.*;

import java.awt.event.*;
import java.util.Enumeration;

public class SimpleMouseBhv extends Applet {

	public BranchGroup createSceneGraph() {
		BranchGroup objRoot = new BranchGroup();
				// 创建根分支节点
		objRoot.addChild(new Axis());
				// 创建x,y,x坐标轴

        TransformGroup	objTG	= null;
		Transform3D		objT3D	= new Transform3D();
        MouseRotate		myMR	= null;
		MouseTranslate	myMT	= null;
		MouseZoom		myMZ	= null;
        
        // 创建左边的局部坐标系，添加旋转、平移功能
        objT3D.setTranslation(new Vector3f(-0.6f, 0.0f, -0.6f));
        objTG = new TransformGroup(objT3D);
        objTG.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        objTG.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);

        objRoot.addChild(objTG);
        objTG.addChild(new ColorCube(0.4));
		// 添加旋转功能
        myMR = new MouseRotate();
        myMR.setTransformGroup(objTG);
        myMR.setSchedulingBounds(new BoundingSphere());
        objRoot.addChild(myMR);
		// 添加平移功能
		myMT = new MouseTranslate();
		myMT.setTransformGroup(objTG);
		myMT.setSchedulingBounds(new BoundingSphere());
		objRoot.addChild(myMT);
		
        // 创建右边的局部坐标系，添加旋转，缩放功能
        objT3D.setTranslation(new Vector3f( 0.6f, 0.0f, -0.6f));
        objTG = new TransformGroup(objT3D);
        objTG.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        objTG.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);

        objRoot.addChild(objTG);
        objTG.addChild(new ColorCube(0.4));
		// 添加旋转功能
        myMR = new MouseRotate();
        myMR.setTransformGroup(objTG);
        myMR.setSchedulingBounds(new BoundingSphere());
        objRoot.addChild(myMR);
		// 添加缩放功能
		myMZ = new MouseZoom();
		myMZ.setTransformGroup(objTG);
		myMZ.setSchedulingBounds(new BoundingSphere());
		objRoot.addChild(myMZ);
		objRoot.compile();
		return objRoot;
    } 
    public SimpleMouseBhv() {
        setLayout(new BorderLayout());
        Canvas3D canvas3D = new Canvas3D(null);
        add("Center", canvas3D);

        BranchGroup scene = createSceneGraph();

         SimpleUniverse simpleU = new SimpleUniverse(canvas3D);

        simpleU.getViewingPlatform().setNominalViewingTransform();

        simpleU.addBranchGraph(scene);
    }
    public static void main(String[] args) {
         Frame frame = new MainFrame(new SimpleMouseBhv(), 256, 256);
    } 
}