使用cocos2d-js-3.0RC1中的物理引擎chipmunk模拟的“别碰钉子”源码分享（含碰撞检测）

分别用box2d和chipmunk实现了一下，不过box2d没整理，也懒得整理了。
chipmunk整理了一下，分享给大家吧。

刚开始研究，抛砖引玉

简要说明：
1、初始化物理环境，增加边界

initPhysics: function () {
        var space = this.space ;
        var staticBody = space.staticBody;

        //开启物体形状测试
        //this.initDebugMode();

        // Gravity
        space.gravity = cp.v(0, -980);      //重力
        space.sleepTimeThreshold = 0.5;     //休眠临界时间
        space.collisionSlop = 0.5;          //

        // Walls--四个边界
        var walls = [ new cp.SegmentShape( staticBody, cp.v(0,0-1), cp.v(winSize.width,0), 0-1 ),                // bottom
            new cp.SegmentShape( staticBody, cp.v(0,winSize.height), cp.v(winSize.width,winSize.height), 0),    // top
            new cp.SegmentShape( staticBody, cp.v(0,0), cp.v(0,winSize.height), 0),                // left
            new cp.SegmentShape( staticBody, cp.v(winSize.width,0), cp.v(winSize.width,winSize.height), 0)    // right
        ];
        for( var i=0; i < walls.length; i++ ) {
            var shape = walls<i>;
            shape.setElasticity(1);         //弹性
            shape.setFriction(0);           //摩擦
            //space.addStaticShape( shape );
            space.addShape( shape );
            if(i >= 2){
                shape.setCollisionType(3);
            }
            shape.setLayers(1);
        }
    },</i>

2、物体形状测试

initDebugMode: function () {
        this._debugNode = cc.PhysicsDebugNode.create(this.space);
        this.addChild(this._debugNode);
    },

3、物体定义

initBoxWithBody: function () {
        //物体的定义
        var mass = 1;
        var boxWidth = 32;

        var body = new cp.Body(mass, cp.momentForBox(mass, boxWidth, boxWidth) );
        body.setPos( cc.p(winSize.width/2, winSize.height/2) );
        this.space.addBody( body );
        var shape = new cp.BoxShape( body, boxWidth, boxWidth);
        shape.setElasticity( 0.5 );
        shape.setFriction( 0.3 );
        shape.setCollisionType(1);
        shape.setLayers(3);
        this.space.addShape( shape );

        //创建一个箱子
        var v_texture = cc.textureCache.addImage(res.box_png);
        this.box = cc.PhysicsSprite.create(v_texture,cc.rect(0,0,boxWidth,boxWidth));
        this.box.setBody(body);
        this.addChild(this.box,1);
        this.box.setTag(101);

        //上下移动
        var moveTo1 = cc.MoveTo.create(0.5, winSize.width / 2, this.box.y + 40);
        var moveTo2 = cc.MoveTo.create(0.5, winSize.width / 2, this.box.y - 40);
        this.downUpAction = cc.RepeatForever.create(cc.Sequence.create(moveTo1,moveTo2));
        this.box.runAction(this.downUpAction);
    },

4、增加点击事件、碰撞检测监听

onEnter: function () {
        this._super();

        cc.sys.dumpRoot();
        cc.sys.garbageCollect();

        //事件处理
        if( ‘touches‘ in cc.sys.capabilities ){
            cc.eventManager.addListener({
                event: cc.EventListener.TOUCH_ALL_AT_ONCE,
                onTouchesEnded: function(touches, event){
                    event.getCurrentTarget().processEvent( touches[0] );
                }
            }, this);
        } else if( ‘mouse‘ in cc.sys.capabilities ){
            cc.eventManager.addListener({
                event: cc.EventListener.MOUSE,
                onMouseDown: function(event){
                    event.getCurrentTarget().processEvent( event );
                }
            }, this);
        }

        //重置数据
        this.resetDatas();
        //
        this.scheduleUpdate();

        //添加碰撞监听事件
        // 1 & 2 检测box和上下BLOCK碰撞
        this.space.addCollisionHandler( 1, 2,
            this.collisionBegin.bind(this),
            this.collisionPre.bind(this),
            this.collisionPost.bind(this),
            this.collisionSeparate.bind(this)
        );
        // 1 & 3 检测box和左右边界碰撞
        this.space.addCollisionHandler( 1, 3,
            this.collisionBegin.bind(this),
            this.collisionPre.bind(this),
            this.collisionPost.bind(this),
            this.collisionSeparate.bind(this)
        );
        // 1 & 4 检测box和左右BLOCK碰撞
        this.space.addCollisionHandler( 1, 4,
            this.collisionBegin.bind(this),
            this.collisionPre.bind(this),
            this.collisionPost.bind(this),
            this.collisionSeparate.bind(this)
        );
    },

5、碰撞检测

collisionBegin : function ( arbiter, space ) {

        var shapes = arbiter.getShapes();

        var shapeA = shapes[0];
        var shapeB = shapes[1];

        var collTypeA = shapeA.collision_type;
        var collTypeB = shapeB.collision_type;

        if(collTypeB == 3){
            console.log( ‘Collision Type A:‘ + collTypeA );
            console.log( ‘end Collision Type B:‘ + collTypeB );

            this.boxDirectionX = -this.boxDirectionX;

            this.space.addPostStepCallback(function () {
                this.updateBoxAndBlocks();
            }.bind(this));
        }else if(collTypeB == 2 || collTypeB == 4)
        {//碰到上下墙壁 或者 左右出来的BLOCKS 就Gameover
            this.gameOver();
        }

        return true;
    },

    collisionPre : function ( arbiter, space ) {
        //console.log(‘collision pre‘);
        return true;
    },

    collisionPost : function ( arbiter, space ) {
        //console.log(‘collision post‘);
    },

    collisionSeparate : function ( arbiter, space ) {
        //console.log(‘collision separate‘);
    }