shineZ 菜鸟学物理引擎 as3 APE教程

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代码:

//1.导入类包
import org.cove.ape.*;
import flash.events.Event;
//2.初始化引擎:
APEngine.init();//初始化引擎
APEngine.container = this;//指定容器;
APEngine.addForce(new VectorForce(false,0,5));//添加力;
//3.添加物体(粒子,约束,复合体,组...)
var defaultGroup:Group = new Group();//建一个默认组;
defaultGroup.collideInternal = true;//组内的对象互相之间有作用力;
var a:CircleParticle = new CircleParticle(350,30,5,false);//创建一个圆形粒子;
var b:CircleParticle = new CircleParticle(100,150,4,false);//创建一个圆形子;
var c:RectangleParticle = new RectangleParticle(stage.stageWidth/2,stage.stageHeight-10,stage.stageWidth,10,0,true);//创建一个矩形粒子;
var d:RectangleParticle = new RectangleParticle(0,stage.stageHeight/2,10,stage.stageHeight,0,true);
var e:RectangleParticle = new RectangleParticle(stage.stageWidth,stage.stageHeight/2,10,stage.stageHeight,0,true);
var wa: WheelParticle = new WheelParticle(150,10,15,false,2);//创建一个轮子粒子;
var wb: WheelParticle = new WheelParticle(200,10,15,false,2);//创建一个轮子粒子;
var wc:SpringConstraint = new SpringConstraint(wa, wb, 1, false);//创建一个约束,将两个轮子粒子连接起来;
defaultGroup.addParticle(a);//在组中添加a粒子;
defaultGroup.addParticle(b);//在组中添加b粒子;
defaultGroup.addParticle(c);//在组中添加c粒子;
defaultGroup.addParticle(d);//在组中添加d粒子;
defaultGroup.addParticle(e);//在组中添加e粒子;
defaultGroup.addParticle(wa);//在组中添加wa轮子粒子;
defaultGroup.addParticle(wb);//在组中添加wb轮子粒子;
defaultGroup.addConstraint(wc);//在组中添加约束;
//<!--这里应该调用Object.setStyle()或Object.setDisplay()来显示自己想要的外观-->
//4.将组添加到引擎;
APEngine.addGroup(defaultGroup);//将组添加到引擎,因为组的collideInternal属性为true,所以组内部的粒子会互相产生物理作用;
//5.添加侦听器.刷新粒子引擎;
stage.addEventListener(Event.ENTER_FRAME, run);
function run(evt:Event):void {
    APEngine.step();
    APEngine.paint();
}
//<!--额外添加代码-->
import flash.events.KeyboardEvent;
stage.addEventListener(KeyboardEvent.KEY_DOWN,keyHandler);
stage.addEventListener(KeyboardEvent.KEY_UP,keyHandler);
function keyHandler(event:KeyboardEvent) {
    if (event.type==KeyboardEvent.KEY_DOWN) {
        if (event.keyCode==Keyboard.LEFT) {
            wa.angularVelocity = -0.1;
            wb.angularVelocity = -0.1;
            //轮子粒子向左滚动;
        } else if (event.keyCode==Keyboard.RIGHT) {
            wa.angularVelocity = 0.1;
            wb.angularVelocity = 0.1;
        }//轮子粒子向右滚动;
    } else {
        wa.angularVelocity = 0;
        wb.angularVelocity = 0;
        //轮子粒子停止滚动;
    }
}

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2009-8-12 19:03, 下载次数: 168

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代码:

if ((! c.fixed) || c.alwaysRepaint) c.paint();