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183 lines (170 loc) · 4.29 KB
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namespace XLib.Math.Easing
{
/// <summary>
/// 缓动函数接口
/// </summary>
public interface IEasingFunction
{
public EasingMode Mode { get; set; }
public double Ease(double t);
}
/// <summary>
/// 缓动函数基类
/// </summary>
public abstract class EaseBase : IEasingFunction
{
public EasingMode Mode { get; set; }
public abstract double Ease(double t);
}
/// <summary>
/// 直线。即无缓动
/// </summary>
public class LinearEase : EaseBase
{
public override double Ease(double t) => t;
}
/// <summary>
/// 二次方
/// </summary>
public class QuadraticEase : EaseBase
{
public override double Ease(double t)
{
return Mode switch
{
EasingMode.EaseIn => EF.InQuad(t),
EasingMode.EaseOut => EF.OutQuad(t),
EasingMode.EaseInOut => EF.InOutQuad(t),
_ => t,
};
}
}
/// <summary>
/// 三次方
/// </summary>
public class CubicEase : EaseBase
{
public override double Ease(double t)
{
return Mode switch
{
EasingMode.EaseIn => EF.InCubic(t),
EasingMode.EaseOut => EF.OutCubic(t),
EasingMode.EaseInOut => EF.InOutCubic(t),
_ => t,
};
}
}
/// <summary>
/// 四次方
/// </summary>
public class QuarticEase : EaseBase
{
public override double Ease(double t)
{
return Mode switch
{
EasingMode.EaseIn => EF.InQuart(t),
EasingMode.EaseOut => EF.OutQuart(t),
EasingMode.EaseInOut => EF.InOutQuart(t),
_ => t,
};
}
}
/// <summary>
/// 五次方
/// </summary>
public class QuinticEase : EaseBase
{
public override double Ease(double t)
{
return Mode switch
{
EasingMode.EaseIn => EF.InQuint(t),
EasingMode.EaseOut => EF.OutQuint(t),
EasingMode.EaseInOut => EF.InOutQuint(t),
_ => t,
};
}
}
/// <summary>
/// 正弦
/// </summary>
public class SineEase : EaseBase
{
public override double Ease(double t)
{
return Mode switch
{
EasingMode.EaseIn => EF.InSine(t),
EasingMode.EaseOut => EF.OutSine(t),
EasingMode.EaseInOut => EF.InOutSine(t),
_ => t,
};
}
}
/// <summary>
/// 振荡
/// </summary>
public class ElasticEase : EaseBase
{
public override double Ease(double t)
{
return Mode switch
{
EasingMode.EaseIn => EF.InElastic(t),
EasingMode.EaseOut => EF.OutElastic(t),
EasingMode.EaseInOut => EF.InOutElastic(t),
_ => t,
};
}
}
/// <summary>
/// 弹跳
/// </summary>
public class BounceEase : EaseBase
{
public override double Ease(double t)
{
return Mode switch
{
EasingMode.EaseIn => EF.InBounce(t),
EasingMode.EaseOut => EF.OutBounce(t),
EasingMode.EaseInOut => EF.InOutBounce(t),
_ => t,
};
}
}
/// <summary>
/// 后退
/// </summary>
public class BackEase : EaseBase
{
public override double Ease(double t)
{
return Mode switch
{
EasingMode.EaseIn => EF.InBack(t),
EasingMode.EaseOut => EF.OutBack(t),
EasingMode.EaseInOut => EF.InOutBack(t),
_ => t,
};
}
}
/// <summary>
/// 圆形
/// </summary>
public class CircleEase : EaseBase
{
public override double Ease(double t)
{
return Mode switch
{
EasingMode.EaseIn => EF.InCirc(t),
EasingMode.EaseOut => EF.OutCirc(t),
EasingMode.EaseInOut => EF.InOutCirc(t),
_ => t,
};
}
}
}