DAY 10
2

C#應用(12)把jQuery Easing Plugin搬到C#來用

*Easing函數的C#版本, 用於計算控制項的Size或坐標, 藉以產生動畫效果

*jQuery Easing Plugin 是一個動畫效果的運算外掛, 原本是在JavaScript下配合jQuery使用
*雖然在.NET FremeWork 4 / 4.5 的WPF 有個效果類似的Easing 函式 但這裡並不用它

*檔案 Easing.cs

``````using System;

namespace Plugin.Animation
{
public class Easing
{
public static double linear(
double t, double b, double c, double d)
{
return c * t / d + b;
}

double t, double b, double c, double d)
{
return c*(t/=d)*t + b;
}

double t, double b, double c, double d)
{
return -c *(t/=d)*(t-2) + b;
}

double t, double b, double c, double d)
{
if ((t/=d/2) < 1) return c/2*t*t + b;
return -c/2 * ((--t)*(t-2) - 1) + b;
}

public static double easeInCubic(
double t, double b, double c, double d)
{
return c*(t/=d)*t*t + b;
}

public static double easeOutCubic(
double t, double b, double c, double d)
{
return c*((t=t/d-1)*t*t + 1) + b;
}

public static double easeInOutCubic(
double t, double b, double c, double d)
{
if ((t/=d/2) < 1) return c/2*t*t*t + b;
return c/2*((t-=2)*t*t + 2) + b;
}

public static double easeInQuart(
double t, double b, double c, double d)
{
return c*(t/=d)*t*t*t + b;
}

public static double easeOutQuart(
double t, double b, double c, double d)
{
return -c * ((t=t/d-1)*t*t*t - 1) + b;
}

public static double easeInOutQuart(
double t, double b, double c, double d)
{
if ((t/=d/2) < 1) return c/2*t*t*t*t + b;
return -c/2 * ((t-=2)*t*t*t - 2) + b;
}

public static double easeInQuint(
double t, double b, double c, double d)
{
return c*(t/=d)*t*t*t*t + b;
}

public static double easeOutQuint(
double t, double b, double c, double d)
{
return c*((t=t/d-1)*t*t*t*t + 1) + b;
}

public public static double easeInOutQuint(
double t, double b, double c, double d)
{
if ((t/=d/2) < 1) return c/2*t*t*t*t*t + b;
return c/2*((t-=2)*t*t*t*t + 2) + b;
}

public static double easeInSine(
double t, double b, double c, double d)
{
return -c * Math.Cos(t/d * (Math.PI/2)) + c + b;
}

public static double easeOutSine(
double t, double b, double c, double d)
{
return c * Math.Sin(t/d * (Math.PI/2)) + b;
}

public static double easeInOutSine(
double t, double b, double c, double d)
{
return -c/2 * (Math.Cos(Math.PI*t/d) - 1) + b;
}

public static double easeInExpo(
double t, double b, double c, double d)
{
return (t==0) ? b : c * Math.Pow(2, 10 * (t/d - 1)) + b;
}

public static double easeOutExpo(
double t, double b, double c, double d)
{
return (t==d) ? b+c : c * (-Math.Pow(2, -10 * t/d) + 1) + b;
}

public static double easeInOutExpo(
double t, double b, double c, double d)
{
if (t==0) return b;
if (t==d) return b+c;
if ((t/=d/2) < 1) return c/2 * Math.Pow(2, 10 * (t - 1)) + b;
return c/2 * (-Math.Pow(2, -10 * --t) + 2) + b;
}

public static double easeInCirc(
double t, double b, double c, double d)
{
return -c * (Math.Sqrt(1 - (t/=d)*t) - 1) + b;
}

public static double easeOutCirc(
double t, double b, double c, double d)
{
return c * Math.Sqrt(1 - (t=t/d-1)*t) + b;
}

public static double easeInOutCirc(
double t, double b, double c, double d)
{
if ((t/=d/2) < 1) return -c/2 * (Math.Sqrt(1 - t*t) - 1) + b;
return c/2 * (Math.Sqrt(1 - (t-=2)*t) + 1) + b;
}

public static double easeInElastic(
double t, double b, double c, double d)
{
double s=1.70158;
double p;
double a=c;
if (t==0) return b;
if ((t/=d)==1) return b+c;
p=d*0.3;
if (a < Math.Abs(c)) { a=c; s=p/4; }
else s = p/(2*Math.PI) * Math.Asin (c/a);
return -(a*Math.Pow(2,10*(t-=1)) * Math.Sin( (t*d-s)*(2*Math.PI)/p )) + b;
}

public static double easeOutElastic(
double t, double b, double c, double d)
{
double s=1.70158;
double p;
double a=c;
if (t==0) return b;
if ((t/=d)==1) return b+c;
p=d*0.3;
if (a < Math.Abs(c)) { a=c; s=p/4; }
else s = p/(2*Math.PI) * Math.Asin (c/a);
return a*Math.Pow(2,-10*t) * Math.Sin( (t*d-s)*(2*Math.PI)/p ) + c + b;
}

public static double easeInOutElastic(
double t, double b, double c, double d)
{
double s=1.70158;
double p;
double a=c;
if (t==0) return b;
if ((t/=d/2)==2) return b+c;
p=d*(0.3*1.5);
if (a < Math.Abs(c)) { a=c; s=p/4; }
else s = p/(2*Math.PI) * Math.Asin (c/a);
if (t < 1) return -.5*(a*Math.Pow(2,10*(t-=1)) * Math.Sin( (t*d-s)*(2*Math.PI)/p )) + b;
return a*Math.Pow(2,-10*(t-=1)) * Math.Sin( (t*d-s)*(2*Math.PI)/p )*.5 + c + b;
}

public static double easeInBack(
double t, double b, double c, double d, double? s = null)
{
double s2 = (s == null) ? (s2 = 1.70158) : (double)s;
return c*(t/=d)*t*((s2+1)*t - s2) + b;
}

public static double easeOutBack(
double t, double b, double c, double d, double? s = null)
{
double s2 = (s == null) ? (s2 = 1.70158) : (double)s;
return c*((t=t/d-1)*t*((s2+1)*t + s2) + 1) + b;
}

public static double easeInOutBack(
double t, double b, double c, double d, double? s = null)
{
double s2 = (s == null) ? (s2 = 1.70158) : (double)s;
if ((t/=d/2) < 1) return c/2*(t*t*(((s2*=(1.525))+1)*t - s2)) + b;
return c/2*((t-=2)*t*(((s2*=(1.525))+1)*t + s2) + 2) + b;
}

public static double easeInBounce(
double t, double b, double c, double d)
{
return c - Easing.easeOutBounce(d-t, 0, c, d) + b;
}

public static double easeOutBounce(
double t, double b, double c, double d)
{
if ((t/=d) < (1/2.75)) {
return c*(7.5625*t*t) + b;
} else if (t < (2/2.75)) {
return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;
} else if (t < (2.5/2.75)) {
return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
} else {
return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;
}
}

public static double easeInOutBounce(
double t, double b, double c, double d)
{
if (t < d / 2) return Easing.easeInBounce(t * 2, 0, c, d) * .5 + b;
return Easing.easeOutBounce(t * 2 - d, 0, c, d) * .5 + c * .5 + b;
}
}
}
``````

*使用範例

t: current time
b: begInnIng value
c: change In value
d: duration

c#應用13