Java3D与计算机三维动态图形网络编程设计源程序3.doc

例6.22 MouseRotate、MouseTranslate、MouseWheelZoom、MouseZoom类及setupCallback()方法、transformChanged()方法的编程应用实例。 import java.applet.Applet; import java.awt.BorderLayout; import com.sun.j3d.utils.applet.MainFrame; import com.sun.j3d.utils.geometry.*; import com.sun.j3d.utils.universe.*; import javax.media.j3d.*; import javax.vecmath.*; import com.sun.j3d.utils.behaviors.mouse.*; import java.awt.GraphicsConfiguration; public class MouseBehaviorsC extends Applet implements MouseBehaviorCallback {public BranchGroup createBranchGroupSceneGraph() {BranchGroup BranchGroupRoot = new BranchGroup(); BoundingSphere bounds=new BoundingSphere(new Point3d(0.0,0.0,0.0),100); Color3f bgColor = new Color3f(1.0f,1.0f,1.0f); Background bg = new Background(bgColor); bg.setApplicationBounds(bounds); BranchGroupRoot.addChild(bg); //定义平行光 Color3f directionalColor = new Color3f(1.f,1.f,0.9f); Vector3f vec = new Vector3f(4.0f, -7.0f, -12.0f); DirectionalLight directionalLight = new DirectionalLight(directionalColor,vec); directionalLight.setInfluencingBounds(bounds); BranchGroupRoot.addChild(directionalLight); //定义总的变换 Transform3D t1 = new Transform3D(); t1.setScale(3); TransformGroup transformGroup = new TransformGroup(t1); transformGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE); transformGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_READ); BranchGroupRoot.addChild(transformGroup); //定义鼠标旋转、平移、变比对象及设置setupCallback（）方法 MouseRotate mouseRotate = new MouseRotate(); mouseRotate.setTransformGroup(transformGroup); mouseRotate.setupCallback(this); BranchGroupRoot.addChild(mouseRotate); mouseRotate.setSchedulingBounds(bounds); MouseZoom mousezoom = new MouseZoom(); mousezoom.setTransformGroup(transformGroup); mousezoom.setupCallback(this); BranchGroupRoot.addChild(mousezoom); mousezoom.setSchedulingBounds(bounds); MouseWheelZoom mousewheelzoom = new MouseWheelZoom(); mousewheelzoom.setTransformGroup(transformGroup); mousewheelzoom.setupCallback(this); BranchGroupRoot.addChild(mousewheelz