JME基础教程代码分析4

package com.hello;

import com.jme3.app.SimpleApplication;

import com.jme3.material.Material;

import com.jme3.math.ColorRGBA;

import com.jme3.math.Vector3f;

import com.jme3.scene.Geometry;

import com.jme3.scene.shape.Box;

 

/** Sample 4 - how to trigger repeating actions from the main update loop.

 * In this example, we make the player character rotate. */

public class HelloLoop extends SimpleApplication {

 

    public static void main(String[] args){

        HelloLoop app = new HelloLoop();

        app.start();

    }

    //被操作的几何体主体

    protected Geometry player;

 

    @Override

    public void simpleInitApp() {

 

        Box b = new Box(Vector3f.ZERO, 1, 1, 1);

        player = new Geometry("blue cube", b);

        Material mat = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");

        mat.setColor("Color", ColorRGBA.Blue);

        player.setMaterial(mat);

        rootNode.attachChild(player);

    }

 

    /* This is the update loop */

    //又是一个重载方法，现在就知道它是由Application的update方法回调的，更新场景。以后再分析SimpleApplication和Application代码

    //tpf可以理解为单位时间内的速度值

    @Override

    public void simpleUpdate(float tpf) {

        // make the player rotate

        player.rotate(0, 2*tpf, 0);

    }

}