JME基础教程代码分析1

有人还在问ecplisce的JME3开发环境怎么配，其实文档和教程已经说了：Using any other IDE, create a Java SE project and place jMonkeyEngine3.jar and all JARs from the lib directory on the Classpath. 使用其他IDE工具需要把jMonkeyEngine3.jar包和lib目录下的JARS包加到Classpath下，我的还是做个user lib好。

第一个程序

package jme3test.helloworld;
import com.jme3.app.SimpleApplication;
import com.jme3.material.Material;
import com.jme3.math.Vector3f;
import com.jme3.scene.Geometry;
import com.jme3.scene.shape.Box;
import com.jme3.math.ColorRGBA;
/** Sample 1 - how to get started with the most simple JME 3 application.
 * Display a blue 3D cube and view from all sides by
 * moving the mouse and pressing the WASD keys. */
public class HelloJME3 extends SimpleApplication {
    public static void main(String[] args){
        HelloJME3 app = new HelloJME3();
        app.start();
    }

//重载simpleInitApp方法，表示为场景添加初始化对象

    @Override
    public void simpleInitApp() {

//声明box立方体，做在世界坐标零点，在三个轴方向都是1倍
        Box b = new Box(Vector3f.ZERO, 1, 1, 1);
        Geometry geom = new Geometry("Box", b);

//加载材质和颜色
        Material mat = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
        mat.setColor("Color", ColorRGBA.Blue);
        geom.setMaterial(mat);

//附加到根节点，也就是附加到场景中
        rootNode.attachChild(geom);
    }
}