/// <summary> /// 线性动画函数(算法基本由Silverlight提取出来) /// </summary> [Description("线性动画函数(算法基本由Silverlight提取出来)")] public static class AnimationCore { #region UniformMotion /// <summary> /// 匀速 /// </summary> /// <param name="origin">要变换的起始值</param> /// <param name="transform">要变换的总值</param> /// <param name="usedTime">已进行动画时间</param> /// <param name="allTime">总动画时间</param> /// <returns></returns> public static double UniformMotion(double origin, double transform, double usedTime, double allTime) { return origin + transform * UniformMotionCore(usedTime, allTime); } /// <summary> /// 匀速 /// </summary> /// <param name="usedTime">已进行动画时间</param> /// <param name="allTime">总动画时间</param> /// <returns></returns> public static double UniformMotionCore(double usedTime, double allTime) { return usedTime / allTime; } #endregion #region Ease /// <summary> /// 变速 /// </summary> /// <param name="origin">要变换的起始值</param> /// <param name="transform">要变换的总值</param> /// <param name="usedTime">已进行动画时间</param> /// <param name="allTime">总动画时间</param> /// <param name="power">动画曲线幂(默认值2)</param> /// <returns></returns> public static double EaseIn(double origin, double transform, double usedTime, double allTime, double power) { return origin + transform * EaseInCore(usedTime / allTime, power); } /// <summary> /// 变速 /// </summary> /// <param name="progressTime">已进行动画时间/总动画时间</param> /// <param name="power">动画曲线幂(默认值2)</param> /// <returns></returns> public static double EaseInCore(double progressTime, double power) { power = Math.Max(0.0, power); return Math.Pow(progressTime, power); } /// <summary> /// 变速 /// </summary> /// <param name="origin">要变换的起始值</param> /// <param name="transform">要变换的总值</param> /// <param name="usedTime">已进行动画时间</param> /// <param name="allTime">总动画时间</param> /// <param name="power">动画曲线幂(默认值2)</param> /// <returns></returns> public static double EaseOut(double origin, double transform, double usedTime, double allTime, double power) { return origin + transform * (EaseOutCore(usedTime / allTime, power)); } /// <summary> /// 变速 /// </summary> /// <param name="progressTime">已进行动画时间/总动画时间</param> /// <param name="power">动画曲线幂(默认值2)</param> /// <returns></returns> public static double EaseOutCore(double progressTime, double power) { return 1.0 - EaseInCore(1.0 - progressTime, power); } /// <summary> /// 变速 /// </summary> /// <param name="origin">要变换的起始值</param> /// <param name="transform">要变换的总值</param> /// <param name="usedTime">已进行动画时间</param> /// <param name="allTime">总动画时间</param> /// <param name="power">动画曲线幂(默认值2)</param> /// <returns></returns> public static double EaseBoth(double origin, double transform, double usedTime, double allTime, double power) { return origin + transform * EaseBothCore(usedTime / allTime, power); } /// <summary> /// 变速 /// </summary> /// <param name="progressTime">已进行动画时间/总动画时间</param> /// <param name="power">动画曲线幂(默认值2)</param> /// <returns></returns> public static double EaseBothCore(double progressTime, double power) { if (progressTime >= 0.5) return (1.0 - EaseInCore((1.0 - progressTime) * 2.0, power)) * 0.5 + 0.5; return EaseInCore(progressTime * 2.0, power) * 0.5; } #endregion #region Back /// <summary> /// 收缩 /// </summary> /// <param name="origin">要变换的起始值</param> /// <param name="transform">要变换的总值</param> /// <param name="usedTime">已进行动画时间</param> /// <param name="allTime">总动画时间</param> /// <param name="power">动画曲线幂(默认值3)</param> /// <param name="amplitude">收缩与相关联的幅度动画。此值必须大于或等于 0。 默认值为 1。</param> /// <returns></returns> public static double BackIn(double origin, double transform, double usedTime, double allTime, double power, double amplitude) { return origin + transform * BackInCore((usedTime / allTime), power, amplitude); } /// <summary> /// 收缩 /// </summary> /// <param name="progressTime">已进行动画时间/总动画时间</param> /// <param name="power">动画曲线幂(默认值3)</param> /// <param name="amplitude">收缩与相关联的幅度动画。此值必须大于或等于 0。 默认值为 1。</param> /// <returns></returns> public static double BackInCore(double progressTime, double power, double amplitude) { amplitude = Math.Max(0.0, amplitude); return Math.Pow(progressTime, power) - progressTime * amplitude * Math.Sin(Math.PI * progressTime); } /// <summary> /// 收缩 /// </summary> /// <param name="origin">要变换的起始值</param> /// <param name="transform">要变换的总值</param> /// <param name="usedTime">已进行动画时间</param> /// <param name="allTime">总动画时间</param> /// <param name="power">动画曲线幂(默认值3)</param> /// <param name="amplitude">收缩与相关联的幅度动画。此值必须大于或等于 0。 默认值为 1。</param> /// <returns></returns> public static double BackOut(double origin, double transform, double usedTime, double allTime, double power, double amplitude) { return origin + transform * BackOutCore((usedTime / allTime), power, amplitude); } /// <summary> /// 收缩 /// </summary> /// <param name="progressTime">已进行动画时间/总动画时间</param> /// <param name="power">动画曲线幂(默认值3)</param> /// <param name="amplitude">收缩与相关联的幅度动画。此值必须大于或等于 0。 默认值为 1。</param> /// <returns></returns> public static double BackOutCore(double progressTime, double power, double amplitude) { return 1.0 - BackInCore(1.0 - progressTime, power, amplitude); } /// <summary> /// 收缩 /// </summary> /// <param name="origin">要变换的起始值</param> /// <param name="transform">要变换的总值</param> /// <param name="usedTime">已进行动画时间</param> /// <param name="allTime">总动画时间</param> /// <param name="power">动画曲线幂(默认值3)</param> /// <param name="amplitude">收缩与相关联的幅度动画。此值必须大于或等于 0。 默认值为 1。</param> /// <returns></returns> public static double BackBoth(double origin, double transform, double usedTime, double allTime, double power, double amplitude) { return origin + transform * BackBothCore(usedTime / allTime, power, amplitude); } /// <summary> /// 收缩 /// </summary> /// <param name="progressTime">已进行动画时间/总动画时间</param> /// <param name="power">动画曲线幂(默认值3)</param> /// <param name="amplitude">收缩与相关联的幅度动画。此值必须大于或等于 0。 默认值为 1。</param> /// <returns></returns> public static double BackBothCore(double progressTime, double power, double amplitude) { if (progressTime >= 0.5) return (1.0 - BackInCore((1.0 - progressTime) * 2.0, power, amplitude)) * 0.5 + 0.5; return BackInCore(progressTime * 2.0, power, amplitude) * 0.5; } #endregion #region Bounce /// <summary> /// 弹球减振 加速 /// </summary> /// <param name="origin">要变换的起始值</param> /// <param name="transform">要变换的总值</param> /// <param name="usedTime">已进行动画时间</param> /// <param name="allTime">总动画时间</param> /// <param name="bounces">反弹次数。值必须大于或等于零(默认值为3)</param> /// <param name="bounciness">指定反弹动画的弹性大小。虽然较高的值都会导致反弹 （弹性较小），此属性中的结果很少或者反弹低值会丢失反弹 （弹性较大） 之间的高度。此值必须是正数(默认值为 2)</param> /// <returns></returns> public static double BounceIn(double origin, double transform, double usedTime, double allTime, int bounces, double bounciness) { return origin + transform * BounceInCore((usedTime / allTime), bounces, bounciness); } /// <summary> /// 弹球减振 加速 /// </summary> /// <param name="progressTime">已进行动画时间/总动画时间</param> /// <param name="bounces">反弹次数。值必须大于或等于零(默认值为3)</param> /// <param name="bounciness">指定反弹动画的弹性大小。虽然较高的值都会导致反弹 （弹性较小），此属性中的结果很少或者反弹低值会丢失反弹 （弹性较大） 之间的高度。此值必须是正数(默认值为 2)</param> /// <returns></returns> public static double BounceInCore(double progressTime, int bounces, double bounciness) { double y1 = Math.Max(0.0, (double)bounces); double num1 = bounciness; if (num1 < 1.0 || Math.Abs(num1 - 1.0) < 2.22044604925031E-15) num1 = 1001.0 / 1000.0; double num2 = Math.Pow(num1, y1); double num3 = 1.0 - num1; double num4 = (1.0 - num2) / num3 + num2 * 0.5; double y2 = Math.Floor(Math.Log(-(progressTime * num4) * (1.0 - num1) + 1.0, num1)); double y3 = y2 + 1.0; double num5 = (1.0 - Math.Pow(num1, y2)) / (num3 * num4); double num6 = (1.0 - Math.Pow(num1, y3)) / (num3 * num4); double num7 = (num5 + num6) * 0.5; double num8 = progressTime - num7; double num9 = num7 - num5; return -Math.Pow(1.0 / num1, y1 - y2) / (num9 * num9) * (num8 - num9) * (num8 + num9); } /// <summary> /// 加速 弹球减振 /// </summary> /// <param name="origin">要变换的起始值</param> /// <param name="transform">要变换的总值</param> /// <param name="usedTime">已进行动画时间</param> /// <param name="allTime">总动画时间</param> /// <param name="bounces">反弹次数。值必须大于或等于零(默认值为3)</param> /// <param name="bounciness">指定反弹动画的弹性大小。虽然较高的值都会导致反弹 （弹性较小），此属性中的结果很少或者反弹低值会丢失反弹 （弹性较大） 之间的高度。此值必须是正数(默认值为 2)</param> /// <returns></returns> public static double BounceOut(double origin, double transform, double usedTime, double allTime, int bounces, double bounciness) { return origin + transform * BounceOutCore((usedTime / allTime), bounces, bounciness); } /// <summary> /// 加速 弹球减振 /// </summary> /// <param name="progressTime">已进行动画时间/总动画时间</param> /// <param name="bounces">反弹次数。值必须大于或等于零(默认值为3)</param> /// <param name="bounciness">指定反弹动画的弹性大小。虽然较高的值都会导致反弹 （弹性较小），此属性中的结果很少或者反弹低值会丢失反弹 （弹性较大） 之间的高度。此值必须是正数(默认值为 2)</param> /// <returns></returns> public static double BounceOutCore(double progressTime, int bounces, double bounciness) { return 1.0 - BounceInCore(1.0 - progressTime, bounces, bounciness); } /// <summary> /// 弹球减振 加速 弹球减振 /// </summary> /// <param name="origin">要变换的起始值</param> /// <param name="transform">要变换的总值</param> /// <param name="usedTime">已进行动画时间</param> /// <param name="allTime">总动画时间</param> /// <param name="bounces">反弹次数。值必须大于或等于零(默认值为3)</param> /// <param name="bounciness">指定反弹动画的弹性大小。虽然较高的值都会导致反弹 （弹性较小），此属性中的结果很少或者反弹低值会丢失反弹 （弹性较大） 之间的高度。此值必须是正数(默认值为 2)</param> /// <returns></returns> public static double BounceBoth(double origin, double transform, double usedTime, double allTime, int bounces, double bounciness) { return origin + transform * BounceBothCore(usedTime / allTime, bounces, bounciness); } /// <summary> /// 弹球减振 加速 弹球减振 /// </summary> /// <param name="progressTime">已进行动画时间/总动画时间</param> /// <param name="bounces">反弹次数。值必须大于或等于零(默认值为3)</param> /// <param name="bounciness">指定反弹动画的弹性大小。虽然较高的值都会导致反弹 （弹性较小），此属性中的结果很少或者反弹低值会丢失反弹 （弹性较大） 之间的高度。此值必须是正数(默认值为 2)</param> /// <returns></returns> public static double BounceBothCore(double progressTime, int bounces, double bounciness) { if (progressTime >= 0.5) return (1.0 - BounceInCore((1.0 - progressTime) * 2.0, bounces, bounciness)) * 0.5 + 0.5; return BounceInCore(progressTime * 2.0, bounces, bounciness) * 0.5; } #endregion #region Elastic /// <summary> /// Elastic /// </summary> /// <param name="origin">要变换的起始值</param> /// <param name="transform">要变换的总值</param> /// <param name="usedTime">已进行动画时间</param> /// <param name="allTime">总动画时间</param> /// <param name="oscillations">目标来回滑过动画目标的次数。此值必须大于或等于0 (默认值为3)</param> /// <param name="springiness">弹簧铡度。 越小的 Springiness 值为，严格 spring，通过每个振动的强度减小的速度越快弹性。一个正数(默认值为3)</param> /// <returns></returns> public static double ElasticIn(double origin, double transform, double usedTime, double allTime, int oscillations, double springiness) { return origin + transform * ElasticInCore((usedTime / allTime), oscillations, springiness); } /// <summary> /// Elastic /// </summary> /// <param name="progressTime">已进行动画时间/总动画时间</param> /// <param name="oscillations">目标来回滑过动画目标的次数。此值必须大于或等于0 (默认值为3)</param> /// <param name="springiness">弹簧铡度。 越小的 Springiness 值为，严格 spring，通过每个振动的强度减小的速度越快弹性。一个正数(默认值为3)</param> /// <returns></returns> public static double ElasticInCore(double progressTime, int oscillations, double springiness) { oscillations = Math.Max(0, oscillations); springiness = Math.Max(0.0, springiness); return (!(Math.Abs(springiness) < 2.22044604925031E-15) ? (Math.Exp(springiness * progressTime) - 1.0) / (Math.Exp(springiness) - 1.0) : progressTime) * Math.Sin((2.0 * Math.PI * oscillations + Math.PI / 2.0) * progressTime); } /// <summary> /// Elastic /// </summary> /// <param name="origin">要变换的起始值</param> /// <param name="transform">要变换的总值</param> /// <param name="usedTime">已进行动画时间</param> /// <param name="allTime">总动画时间</param> /// <param name="oscillations">目标来回滑过动画目标的次数。此值必须大于或等于0 (默认值为3)</param> /// <param name="springiness">弹簧铡度。 越小的 Springiness 值为，严格 spring，通过每个振动的强度减小的速度越快弹性。一个正数(默认值为3)</param> /// <returns></returns> public static double ElasticOut(double origin, double transform, double usedTime, double allTime, int oscillations, double springiness) { return origin + transform * ElasticOutCore((usedTime / allTime), oscillations, springiness); } /// <summary> /// Elastic /// </summary> /// <param name="progressTime">已进行动画时间/总动画时间</param> /// <param name="oscillations">目标来回滑过动画目标的次数。此值必须大于或等于0 (默认值为3)</param> /// <param name="springiness">弹簧铡度。 越小的 Springiness 值为，严格 spring，通过每个振动的强度减小的速度越快弹性。一个正数(默认值为3)</param> /// <returns></returns> public static double ElasticOutCore(double progressTime, int oscillations, double springiness) { return 1.0 - ElasticInCore(1.0 - progressTime, oscillations, springiness); } /// <summary> /// Elastic /// </summary> /// <param name="origin">要变换的起始值</param> /// <param name="transform">要变换的总值</param> /// <param name="usedTime">已进行动画时间</param> /// <param name="allTime">总动画时间</param> /// <param name="oscillations">目标来回滑过动画目标的次数。此值必须大于或等于0 (默认值为3)</param> /// <param name="springiness">弹簧铡度。 越小的 Springiness 值为，严格 spring，通过每个振动的强度减小的速度越快弹性。一个正数(默认值为3)</param> /// <returns></returns> public static double ElasticBoth(double origin, double transform, double usedTime, double allTime, int oscillations, double springiness) { return origin + transform * ElasticBothCore(usedTime / allTime, oscillations, springiness); } /// <summary> /// Elastic /// </summary> /// <param name="progressTime">已进行动画时间/总动画时间</param> /// <param name="oscillations">目标来回滑过动画目标的次数。此值必须大于或等于0 (默认值为3)</param> /// <param name="springiness">弹簧铡度。 越小的 Springiness 值为，严格 spring，通过每个振动的强度减小的速度越快弹性。一个正数(默认值为3)</param> /// <returns></returns> public static double ElasticBothCore(double progressTime, int oscillations, double springiness) { if (progressTime >= 0.5) return (1.0 - ElasticInCore((1.0 - progressTime) * 2.0, oscillations, springiness)) * 0.5 + 0.5; return ElasticInCore(progressTime * 2.0, oscillations, springiness) * 0.5; } #endregion #region Quadratic /// <summary> /// 二次 /// </summary> /// <param name="origin">要变换的起始值</param> /// <param name="transform">要变换的总值</param> /// <param name="usedTime">已进行动画时间</param> /// <param name="allTime">总动画时间</param> /// <returns></returns> public static double QuadraticIn(double origin, double transform, double usedTime, double allTime) { return origin + transform * QuadraticInCore(usedTime / allTime); } /// <summary> /// 二次 /// </summary> /// <param name="progressTime">已进行动画时间/总动画时间</param> /// <returns></returns> public static double QuadraticInCore(double progressTime) { return -4 * Math.Pow((progressTime - 0.5), 2.0) + 1.0; } /// <summary> /// 二次 /// </summary> /// <param name="origin">要变换的起始值</param> /// <param name="transform">要变换的总值</param> /// <param name="usedTime">已进行动画时间</param> /// <param name="allTime">总动画时间</param> /// <returns></returns> public static double QuadraticOut(double origin, double transform, double usedTime, double allTime) { return origin + transform * QuadraticOutCore(usedTime / allTime); } /// <summary> /// 二次 /// </summary> /// <param name="progressTime">已进行动画时间/总动画时间</param> /// <returns></returns> public static double QuadraticOutCore(double progressTime) { if (progressTime >= 0.5) { return 4 * Math.Pow((progressTime - 0.5 - 0.5), 2.0); } return 4 * Math.Pow((progressTime), 2.0); } #endregion }
源码下载地址：动画效果.zip