Java3D读取3DMax模型并实现鼠标拖拽、旋转、滚轮缩放等功能
/**-------------------------------------------------代码区--------------------------------------------------------**/
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.GraphicsConfiguration;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseWheelEvent;
import java.awt.event.MouseWheelListener;
import com.sun.j3d.loaders.Scene;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.behaviors.mouse.*;
import com.sun.j3d.utils.pickfast.behaviors.PickRotateBehavior;
import com.sun.j3d.utils.pickfast.behaviors.PickTranslateBehavior;
import com.sun.j3d.utils.pickfast.behaviors.PickZoomBehavior;
import com.sun.j3d.utils.universe.SimpleUniverse;
import com.sun.javax.media.j3d.*;
import com.sun.javax.vecmath.*;
import com.microcrowd.loader.java3d.max3ds.Loader3DS;
/**
* 3DMax文件加载测试
* @author luo
*
*/
public class M3DMax3dsfileLoader extends Applet {
BranchGroup scenceBranchGroupRoot =null;
BoundingSphere bounds=null;
TransformGroup sceneTG=null;
TransformGroup objTG=null;
Transform3D t3d1 =null;
TransformGroup tg1=null;
BranchGroup loaderBG =null;
public M3DMax3dsfileLoader(){
this.setLayout(new BorderLayout());
GraphicsConfiguration gc = SimpleUniverse.getPreferredConfiguration();
Canvas3D canvas = new Canvas3D(gc);
this.add("Center",canvas);
//this.addMouseWheelListener(this);
BranchGroup scence = createScenceGraph(canvas);
SimpleUniverse u = new SimpleUniverse(canvas);
u.getViewingPlatform().setNominalViewingTransform();
u.addBranchGraph(scence);
}
/**
* 创建场景
* @return
*/
public BranchGroup createScenceGraph(Canvas3D canvas){
//创建BranchGroup
scenceBranchGroupRoot = new BranchGroup();
//创建球形范围、背景、光源
bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0),100.0);
sceneTG = new TransformGroup();
sceneTG.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
scenceBranchGroupRoot.addChild(sceneTG);
//定义鼠标旋转功能
MouseRotate mouserotate = new MouseRotate();
mouserotate.setTransformGroup(sceneTG);
scenceBranchGroupRoot.addChild(mouserotate);
mouserotate.setSchedulingBounds(bounds);
//定义鼠标缩放功能
MouseWheelZoom mouseWheelZoom = new MouseWheelZoom();
mouseWheelZoom.setTransformGroup(sceneTG);
scenceBranchGroupRoot.addChild(mouseWheelZoom);
mouseWheelZoom.setSchedulingBounds(bounds);
//定义鼠标拖拽功能
MouseTranslate mouseTranslate = new MouseTranslate();
mouseTranslate.setTransformGroup(sceneTG);
scenceBranchGroupRoot.addChild(mouseTranslate);
mouseTranslate.setSchedulingBounds(bounds);
//定义背景色
Color3f bgColor = new Color3f(1.0f,1.0f,1.0f);
Background bg = new Background(bgColor);
bg.setApplicationBounds(bounds);
scenceBranchGroupRoot.addChild(bg);
//定义两个平行光源的颜色及照射方向,一个环境光源的颜色
Color3f light1Color = new Color3f(1.0f,1.0f,1.0f);
Vector3f light1Direction = new Vector3f(4.0f,-7.0f,-12.0f);
Color3f light2Color = new Color3f(1.0f,1.0f,1.0f);
Vector3f light2Direction = new Vector3f(-6.0f,-2.0f,-1.0f);
Color3f ambientColor = new Color3f(1.0f,1.0f,1.0f);
//用前面定义的颜色定义环境光
AmbientLight ambientLight = new AmbientLight(ambientColor);
ambientLight.setInfluencingBounds(bounds);
scenceBranchGroupRoot.addChild(ambientLight);
//用前面定义的照射方向与颜色定义两个平行光
DirectionalLight light1 = new DirectionalLight(light1Color,light1Direction);
light1.setInfluencingBounds(bounds);
scenceBranchGroupRoot.addChild(light1);
DirectionalLight light2 = new DirectionalLight(light2Color,light2Direction);
light2.setInfluencingBounds(bounds);
scenceBranchGroupRoot.addChild(light2);
/**
* TransformGroup特点:
* 1.在三维空间中放置任何形体,灯光,声音都要要到该对象。
* 2.该对象用来定义一个通过设置,可以移动、旋转和放大缩小的局部坐标系。
* 3.该对象有两个flags,其中ALLOW_TRANSFORM_WRITE用来将最新的数据(即坐标变化后的数据写入到数据结构中),
* 允许程序在运行的时候修改该节点上的场景。ALLOW_TRANSFORM_READ用来读取位置变化前的数据,从而进行判断和处理。
* 允许程序在运行的时候读取该节点上的场景。
* 4.通过设置ALLOW_TRANSFORM_WRITE来使坐标系运动(此时在不要读取值时使用,如读取移动的距离,选旋转的角度,
* 缩放的比例等值。若要读取这些值,则要再使用ALLOW_TRANSFORM_READ)
* 5.要在程序中通过鼠标,移动、旋转、比例放大所指定的局部坐标系,则需要同时设置ALLOW_TRANSFORM_WRITE和ALLOW_TRANSFORM_READ。
* 6.Java虚拟机会为这两个flags创建单独的线程(或者进程)来负责接收场景的反馈,在控制场景,避免了用户不必要的开销。
*/
objTG = new TransformGroup();
sceneTG.addChild(objTG);
//定义存放3DMax文件的TransformGroup
tg1 = new TransformGroup();
/**
* Transform3D的特点
* 1.表示所指定的坐标的坐标变换,如旋转、放大缩小、平移等
* 2.Quat4f(x,y,z,w)的参数介绍:x:x坐标 y:y坐标 z:z坐标 w:物体旋转的角度 如:
* Quat4f(0.0f,1.0f,0.0f,1.57f) 表示物体绕Y轴旋转90度,当Y轴的只越大则旋转的幅度越大。
* 当x,y,z的值不为0时,其值的大小即表示转动幅度的大小,值越大,表示向该方向转动的幅度也越大。
* 3.Transform3D有四个方法rotx(),roty(), rotz(),setTranslation().当这四个方法一起使用的时候,只有最后一个有作用。
* 为了能够让rotx,roty, rotz都显示出来,则可以使用setRotation(new Quat4())来代替,
* 此时不论setTranslation()在setRotation(new Quat4())前还是后,都可以显示出效果
*/
t3d1 = new Transform3D();
t3d1.setScale(0.005);//初始化大小
t3d1.setTranslation(new Vector3f(0.0f,0.0f,-0.4f));
tg1 = new TransformGroup(t3d1);
//定义3dmax文件以及所有相关材质文件及所在目录。
String modelDir = "";
String fileName = "car.3DS";
loaderBG = new BranchGroup();
try{
Loader3DS modelLoader = new Loader3DS();
Scene loaderScene = modelLoader.load(modelDir+fileName);
if(loaderScene!=null){
loaderBG = loaderScene.getSceneGroup();
}
}catch(Exception e){
e.printStackTrace();
}
tg1.addChild(loaderBG);
objTG.addChild(tg1);
return scenceBranchGroupRoot;
}
public static void main(String[] args){
new MainFrame(new M3DMax3dsfileLoader(), 900,720);
}
}
/**-------------------------------------------------代码区 end--------------------------------------------------------**/
运行效果: