var easing = {};
//渐变曲线函数，反应加速度的变化
easing.linearTween = function(e, t, i, n) {
    return i * e / n + t
}
,
easing.easeInQuad = function(e, t, i, n) {
    return e /= n,
    i * e * e + t
}
,
easing.easeOutQuad = function(e, t, i, n) {
    return e /= n,
    -i * e * (e - 2) + t
}
,
easing.easeInOutQuad = function(e, t, i, n) {
    return e /= n / 2,
    e < 1 ? i / 2 * e * e + t : (e--,
    -i / 2 * (e * (e - 2) - 1) + t)
}
,
easing.easeInCubic = function(e, t, i, n) {
    return e /= n,
    i * e * e * e + t
}
,
easing.easeOutCubic = function(e, t, i, n) {
    return e /= n,
    e--,
    i * (e * e * e + 1) + t
}
,
easing.easeInOutCubic = function(e, t, i, n) {
    return e /= n / 2,
    e < 1 ? i / 2 * e * e * e + t : (e -= 2,
    i / 2 * (e * e * e + 2) + t)
}
,
easing.easeInQuart = function(e, t, i, n) {
    return e /= n,
    i * e * e * e * e + t
}
,
easing.easeOutQuart = function(e, t, i, n) {
    return e /= n,
    e--,
    -i * (e * e * e * e - 1) + t
}
,
easing.easeInOutQuart = function(e, t, i, n) {
    return e /= n / 2,
    e < 1 ? i / 2 * e * e * e * e + t : (e -= 2,
    -i / 2 * (e * e * e * e - 2) + t)
}
,
easing.easeInQuint = function(e, t, i, n) {
    return e /= n,
    i * e * e * e * e * e + t
}
,
easing.easeOutQuint = function(e, t, i, n) {
    return e /= n,
    e--,
    i * (e * e * e * e * e + 1) + t
}
,
easing.easeInOutQuint = function(e, t, i, n) {
    return e /= n / 2,
    e < 1 ? i / 2 * e * e * e * e * e + t : (e -= 2,
    i / 2 * (e * e * e * e * e + 2) + t)
}
,
easing.easeInSine = function(e, t, i, n) {
    return -i * Math.cos(e / n * (Math.PI / 2)) + i + t
}
,
easing.easeOutSine = function(e, t, i, n) {
    return i * Math.sin(e / n * (Math.PI / 2)) + t
}
,
easing.easeInOutSine = function(e, t, i, n) {
    return -i / 2 * (Math.cos(Math.PI * e / n) - 1) + t
}
,
easing.easeInExpo = function(e, t, i, n) {
    return i * Math.pow(2, 10 * (e / n - 1)) + t
}
,
easing.easeOutExpo = function(e, t, i, n) {
    return i * (-Math.pow(2, -10 * e / n) + 1) + t
}
,
easing.easeInOutExpo = function(e, t, i, n) {
    return e /= n / 2,
    e < 1 ? i / 2 * Math.pow(2, 10 * (e - 1)) + t : (e--,
    i / 2 * (-Math.pow(2, -10 * e) + 2) + t)
}
,
easing.easeInCirc = function(e, t, i, n) {
    return e /= n,
    -i * (Math.sqrt(1 - e * e) - 1) + t
}
,
easing.easeOutCirc = function(e, t, i, n) {
    return e /= n,
    e--,
    i * Math.sqrt(1 - e * e) + t
}
,
easing.easeInOutCirc = function(e, t, i, n) {
    return e /= n / 2,
    e < 1 ? -i / 2 * (Math.sqrt(1 - e * e) - 1) + t : (e -= 2,
    i / 2 * (Math.sqrt(1 - e * e) + 1) + t)
}
,
easing.easeInElastic = function(e, t, i, n) {
    var r = 1.70158
      , o = 0
      , a = i;
    return 0 === e ? t : 1 === (e /= n) ? t + i : (o || (o = .3 * n),
    a < Math.abs(i) ? (a = i,
    r = o / 4) : r = o / (2 * Math.PI) * Math.asin(i / a),
    -(a * Math.pow(2, 10 * (e -= 1)) * Math.sin((e * n - r) * (2 * Math.PI) / o)) + t)
}
,
easing.easeOutElastic = function(e, t, i, n) {
    var r = 1.70158
      , o = 0
      , a = i;
    return 0 === e ? t : 1 === (e /= n) ? t + i : (o || (o = .3 * n),
    a < Math.abs(i) ? (a = i,
    r = o / 4) : r = o / (2 * Math.PI) * Math.asin(i / a),
    a * Math.pow(2, -10 * e) * Math.sin((e * n - r) * (2 * Math.PI) / o) + i + t)
}
,
easing.easeInOutElastic = function(e, t, i, n) {
    var r = 1.70158
      , o = 0
      , a = i;
    return 0 === e ? t : 2 === (e /= n / 2) ? t + i : (o || (o = n * (.3 * 1.5)),
    a < Math.abs(i) ? (a = i,
    r = o / 4) : r = o / (2 * Math.PI) * Math.asin(i / a),
    e < 1 ? -.5 * (a * Math.pow(2, 10 * (e -= 1)) * Math.sin((e * n - r) * (2 * Math.PI) / o)) + t : a * Math.pow(2, -10 * (e -= 1)) * Math.sin((e * n - r) * (2 * Math.PI) / o) * .5 + i + t)
}
,
easing.easeInBack = function(e, t, i, n, r) {
    return void 0 === r && (r = 1.70158),
    i * (e /= n) * e * ((r + 1) * e - r) + t
}
,
easing.easeOutBack = function(e, t, i, n, r) {
    return void 0 === r && (r = 1.70158),
    i * ((e = e / n - 1) * e * ((r + 1) * e + r) + 1) + t
}
,
easing.easeInOutBack = function(e, t, i, n, r) {
    return void 0 === r && (r = 1.70158),
    (e /= n / 2) < 1 ? i / 2 * (e * e * (((r *= 1.525) + 1) * e - r)) + t : i / 2 * ((e -= 2) * e * (((r *= 1.525) + 1) * e + r) + 2) + t
}
,
easing.easeOutBounce = function(e, t, i, n) {
    return (e /= n) < 1 / 2.75 ? i * (7.5625 * e * e) + t : e < 2 / 2.75 ? i * (7.5625 * (e -= 1.5 / 2.75) * e + .75) + t : e < 2.5 / 2.75 ? i * (7.5625 * (e -= 2.25 / 2.75) * e + .9375) + t : i * (7.5625 * (e -= 2.625 / 2.75) * e + .984375) + t
}
,
easing.easeInBounce = function(e, t, i, r) {
    return i - easing.easeOutBounce(r - e, 0, i, r) + t
}
,
easing.easeInOutBounce = function(e, t, i, r) {
    return e < r / 2 ? .5 * easing.easeInBounce(2 * e, 0, i, r) + t : .5 * easing.easeOutBounce(x, 2 * e - r, 0, i, r) + .5 * i + t
}

 


var lerp = {
	vector: function(e, t, f) {//xzw change, add f
		var i = e.clone();
		return t = t.clone(),
		function(n) {
			e.set(i.x * (1 - n) + t.x * n, i.y * (1 - n) + t.y * n, i.z * (1 - n) + t.z * n)
			f && f(e,n);
		}
	},
    quaternion: function(e, t, f) {//xzw change, add f
        var i = e.clone();
        return function(n) {
            e.copy(i).slerp(t, n);
			f && f(e,n);
        }
    },
    property: function(e, t, i, n) {
        var r = e[t];
        return function(o) {
            e[t] = r * (1 - o) + i * o,
            n && n(e[t])
        }
    },
    uniform: function(e, t, i) {
        var n = e.material.uniforms[t].value;
        return function(r) {
            try{
                e.material.uniforms[t] && (e.material.uniforms[t].value = n * (1 - r) + i * r)
            }catch(e){
                console.log(1)
            }
            
        }
    },
    matrix4: function(e, t) {
        var i = e.clone();
        return function(n) {
            for (var r = e.elements, o = i.elements, a = t.elements, s = 0; s < 16; s++)
                r[s] = o[s] * (1 - n) + a[s] * n
        }
    },
    allUniforms: function(e, t, i) {
        var n = e.map(function(e) {
            return this.uniform(e, t, i)
        }
        .bind(this));
        return function(e) {
            n.forEach(function(t) {
                t(e)
            })
        }
    }
};
 




/* 
    渐变
    

 */

var transitions = {
    globalDone: null,
    funcs: [],
    counter: 0,
    uniqueID: 0,
    start: function(e, t, i, r, o, a, s, cancelFun) {
        return r = r || 0,
        this.funcs.push({
            func: e,
            current: -r * Math.abs(t),                      //当前时间
            duration: (1 - Math.max(r, 0)) * Math.abs(t),   //总时长
            done: i,
            easing: o || easing.linearTween,                //渐变曲线
            cycling: t < 0,
            running: !0,
            debug: r < 0,
            name: a || "T" + this.counter,
            id: void 0 === s ? this.counter : s,
            paused: !1,
			cancelFun : cancelFun,   //取消时执行的函数
        }),
        e(0, 16),
        this.counter += 1,
        e
    },
    trigger: function(e) {
        var t = void 0 === e.delayRatio ? 0 : e.delayRatio
            , i = e.func || function() {}
            , r = void 0 === e.duration ? 0 : e.duration;
        void 0 !== e.cycling && e.cycling && (r = -Math.abs(r));
        var o = e.done || null
            , a = e.easing || easing.linearTween
            , s = e.name || "R" + this.counter
            , l = void 0 === e.id ? this.counter : e.id;
        return this.start(i, r, o, t, a, s, l)
    },
    setTimeout: function(e, t, i) {
        var n = void 0 === i ? this.counter : i;
        return this.trigger({
            done: e,
            duration: void 0 === t ? 0 : t,
            name: "O" + this.counter,
            id: n
        })
    },
    pause: function() {
        this.paused = !0
    },
    resume: function() {
        this.paused = !1
    },
    update: function(e) {
        this.funcs.forEach(function(t) {
            if (!(t.paused || (t.current += 1e3 * e,
            t.current < 0)))
                if (t.current >= t.duration && !t.cycling) {
                    var i = t.easing(1, 0, 1, 1);
                    t.func(i, 1e3 * e),
                    t.done && t.done(),
                    t.running = !1
                } else {
                    var n = t.easing(t.current % t.duration / t.duration, 0, 1, 1)
                        , r = t.func(n, 1e3 * e) || !1;
                    r && (t.done && t.done(),
                    t.running = !1)
                }
        });
        var t = this.funcs.length;
        this.funcs = this.funcs.filter(function(e) {
            return e.running
        });
        var i = this.funcs.length;
        if (t > 0 && 0 === i && this.globalDone) {
            var n = this.globalDone;
            this.globalDone = null,
            n()
        }
    },
    adjustSpeed: function(e, t) {
        for (var i = this.getById(e), n = 0; n < i.length; n++) {
            var r = i[n];
            r.duration /= t,
            r.current /= t
        }
    },
    getById: function(e) {
        return this.funcs.filter(function(t) {
            return e === t.id
        })
    },
    get: function(e) {
        for (var t = 0; t < this.funcs.length; t += 1)
            if (this.funcs[t].func === e)
                return this.funcs[t];
        return null
    },
    isRunning: function(e) {
        var t = this.get(e);
        return null !== t && t.running
    },
    countActive: function() {
        for (var e = 0, t = 0; t < this.funcs.length; t += 1)
            e += this.funcs[t].running;
        return e
    },
    listActive: function() {
        for (var e = [], t = 0; t < this.funcs.length; t += 1)
            this.funcs[t].running && e.push(this.funcs[t].name);
        return e
    },
    done: function(e) {
        this.globalDone = e
    },
    cancelById: function(e, dealCancelFun) { //xzw add dealDone
        var t = void 0 === e ? 0 : e;
		 
        this.funcs = this.funcs.filter(function(e) {
			var is = e.id == t;
			
			if(is && dealCancelFun){
				e.cancelFun && e.cancelFun()
			} 
            return !is
        })
    },
    cancel: function(e) {
        this.funcs = this.funcs.filter(function(t) {
            return t.func !== e
        })
    },
    getUniqueId: function() {
        return this.uniqueID -= 1,
        this.uniqueID
    } 
};

export    {transitions, lerp, easing}