类 Bezier

En

Utility class for calculating Bezier curves.

Zh

计算贝塞尔曲线的工具类。

构造函数

constructor

方法

getPoints getRate

构造函数

constructor

方法

静态getPoints

  • getPoints(
        pList: number[],
        inSertCount?: number,
        count?: number,
        out?: number[],
    ): number[]

    参数

    • pList: number[]

      Control points [x0,y0,x1,y1...]

    • inSertCount: number = 5

      The number of interpolation points for each curve segment

    • count: number = 2

      The order of the Bezier curve (2 for quadratic, 3 for cubic)

    • 可选out: number[]

    返回 number[]

    An array of points on the Bezier curve

    En

    Get points on the Bezier curve.

    Zh

    获取贝塞尔曲线上的点。

静态getRate

  • getRate(t: number, px0: number, py0: number, px1: number, py1: number): number

    参数

    • t: number

      The progress parameter, between 0 and 1, where 0 represents the start of the curve and 1 represents the end.

    • px0: number

      X-coordinate of the first control point P1.

    • py0: number

      Y-coordinate of the first control point P1.

    • px1: number

      X-coordinate of the second control point P2.

    • py1: number

      Y-coordinate of the second control point P2.

    返回 number

    The interpolated y-value at the given progress t. This value represents the state of an animated property at that point in the animation. If t is greater than the x-coordinate of all sampled points, it returns 1.

    En

    Get the interpolated y-value on a special cubic Bezier curve at a given progress t. This curve is defined with fixed start point P0(0,0) and end point P3(1,1), commonly used for easing functions in animations.

    Zh

    获取特殊三次贝塞尔曲线在给定进度 t 的插值 y 值。 这条曲线的起点 P0 固定为 (0,0)，终点 P3 固定为 (1,1)，通常用于定义动画的缓动函数。

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目录

构造函数
方法