d3-interpolate
该模块提供多种插值方法，用于在两个值之间进行混合。值可以是数字、颜色、字符串、数组，甚至是深度嵌套的对象。例如：
🌐 This module provides a variety of interpolation methods for blending between two values. Values may be numbers, colors, strings, arrays, or even deeply-nested objects. For example:
const i = d3.interpolateNumber(10, 20);
i(0.0); // 10
i(0.2); // 12
i(0.5); // 15
i(1.0); // 20返回的函数 i 是一个插值器。给定起始值 a 和结束值 b，它采用一个参数 t，通常在 [0, 1] 范围内，并返回相应的插值。插值器通常在 t = 0 时返回等于 a 的值，在 t = 1 时返回等于 b 的值。
🌐 The returned function i is an interpolator. Given a starting value a and an ending value b, it takes a parameter t typically in [0, 1] and returns the corresponding interpolated value. An interpolator typically returns a value equivalent to a at t = 0 and a value equivalent to b at t = 1.
你不仅可以插值数字。要找到钢蓝色和棕色之间的感知中点：
🌐 You can interpolate more than just numbers. To find the perceptual midpoint between steelblue and brown:
d3.interpolateLab("steelblue", "brown")(0.5); // "rgb(142, 92, 109)"或者，作为从 t = 0 到 t = 1 的颜色渐变：
🌐 Or, as a color ramp from t = 0 to t = 1:
这里有一个更详细的示例，展示了 interpolate 使用的类型推断：
🌐 Here’s a more elaborate example demonstrating type inference used by interpolate:
const i = d3.interpolate({colors: ["red", "blue"]}, {colors: ["white", "black"]});
i(0.0); // {colors: ["rgb(255, 0, 0)", "rgb(0, 0, 255)"]}
i(0.5); // {colors: ["rgb(255, 128, 128)", "rgb(0, 0, 128)"]}
i(1.0); // {colors: ["rgb(255, 255, 255)", "rgb(0, 0, 0)"]}请注意，通用值插值器不仅可以检测嵌套对象和数组，还可以检测颜色字符串和嵌入在字符串中的数字！
🌐 Note that the generic value interpolator detects not only nested objects and arrays, but also color strings and numbers embedded in strings!
请参阅以下之一：
🌐 See one of: