ccc 多点触控

研究了一天，多点触控的点无法保存，只能模拟多点触控了

cc.Class({
    extends: cc.Component,

    properties: {
        wheelStick:{
            default:null,
            type:cc.Sprite
        },
        hero:
        {
            default:null,
            type:cc.Sprite
        },
        wheelDir:
        {
            default:"null",
        }

    },

    // use this for initialization
    onLoad: function () {

        this.registerInput();

        this.test()
    },

    registerInput:function()
    {
        var self=this

        cc.eventManager.addListener({
            event: cc.EventListener.TOUCH_ONE_BY_ONE,

            //开始
            onTouchBegan: function(touch, event) {
                self.onTouchBegan(self,touch);
                return true; // don't capture event
            },

            //移动
            onTouchMoved: function(touch, event) {
                self.onTouchMoved(self,touch);
            },

            //结束
            onTouchEnded: function(touch, event) {
                self.onTouchEnded(self,touch);
            }
        }, self.node);
    },

    onTouchBegan:function(self,touch)
    {
        //show
        let touchPos=touch.getLocation()
        if(touchPos.x<480)
        {
            let wheelPos=self.node.position
            self.wheelStick.node.position=cc.pSub(touchPos,wheelPos)

            //发射消息
            self.wheelDir=self.figureDirFromTouchPoint(touchPos)
        }

    },
    onTouchMoved:function(self,touch)
    {
        //show
        let touchPos=touch.getLocation()
        if(touchPos.x<480)
        {
            let wheelPos=self.node.position
            self.wheelStick.node.position=cc.pSub(touchPos,wheelPos)
            //发射消息
            self.wheelDir=self.figureDirFromTouchPoint(touchPos)
        }    

    },
    onTouchEnded:function(self,touch)
    {
        self.wheelStick.node.position=cc.p(0,0)
        self.wheelDir="null"
    },

    figureDirFromTouchPoint:function(touchPoint)
    {
        let cenPoint=this.node.position;
        let arr=cc.pSub(touchPoint,cenPoint)
        let angle=Math.atan2(arr.y,arr.x)* 180 / 3.14

        if (angle <= 45 && angle > -45)
            return "right"
        if (angle <= -135 || angle > 135)
            return "left"
        if (angle >= 45 && angle < 135)
            return "up"
        if (angle <= -45 && angle >-135)
            return "down"
    },

    update:function()
    {
        let dir=this.wheelDir
        if(dir=="up")
            this.hero.node.emit('wheelup', {
                msg: '',
            });

        else if(dir=="down")
            this.hero.node.emit('wheeldown', {
                msg: '',
            });
        else if(dir=="left")
            this.hero.node.emit('wheelleft', {
                msg: '',
            });
        else if(dir=="right")
            this.hero.node.emit('wheelright', {
                msg: '',
            });
    },

    test:function()
    {
        //测试角度
        let tdd=require("TDD")
        let cenPoint=this.node.position;

        let tp1=cc.p(cenPoint.x+1,cenPoint.y+0)
        tdd.assert("right"==this.figureDirFromTouchPoint(tp1),"figureDirFromTouchPoint1")
        let tp2=cc.p(cenPoint.x+1,cenPoint.y+0.5)
        tdd.assert("right"==this.figureDirFromTouchPoint(tp2),"figureDirFromTouchPoint2")
        let tp3=cc.p(cenPoint.x+1,cenPoint.y-0.5)
        tdd.assert("right"==this.figureDirFromTouchPoint(tp3),"figureDirFromTouchPoint3")

        let tp4=cc.p(cenPoint.x+0,cenPoint.y+1)
        tdd.assert("up"==this.figureDirFromTouchPoint(tp4),"figureDirFromTouchPoint4")
        let tp5=cc.p(cenPoint.x+0.5,cenPoint.y+1)
        tdd.assert("up"==this.figureDirFromTouchPoint(tp5),"figureDirFromTouchPoint5")
        let tp6=cc.p(cenPoint.x-0.5,cenPoint.y+1)
        tdd.assert("up"==this.figureDirFromTouchPoint(tp6),"figureDirFromTouchPoint6")

        let tp7=cc.p(cenPoint.x+0,cenPoint.y-1)
        tdd.assert("down"==this.figureDirFromTouchPoint(tp7),"figureDirFromTouchPoint7")
        let tp8=cc.p(cenPoint.x+0.5,cenPoint.y-1)
        tdd.assert("down"==this.figureDirFromTouchPoint(tp8),"figureDirFromTouchPoint8")
        let tp9=cc.p(cenPoint.x-0.5,cenPoint.y-1)
        tdd.assert("down"==this.figureDirFromTouchPoint(tp9),"figureDirFromTouchPoint9")

        let tp10=cc.p(cenPoint.x-1,cenPoint.y+0)
        tdd.assert("left"==this.figureDirFromTouchPoint(tp10),"figureDirFromTouchPoint10")
        let tp11=cc.p(cenPoint.x-1,cenPoint.y+0.5)
        tdd.assert("left"==this.figureDirFromTouchPoint(tp11),"figureDirFromTouchPoint11")
        let tp12=cc.p(cenPoint.x-1,cenPoint.y-0.5)
        tdd.assert("left"==this.figureDirFromTouchPoint(tp12),"figureDirFromTouchPoint12")

        //测试发送消息
        this.hero.node.emit('testmsg', {
            msg: 'Hello, this is Cocos Creator',
        });

    },

});