两个数字之间的obj-c线性插值 [英] obj-c linear interpolation between two numbers

问题描述

只是想知道是否已经实现了用于处理基础/Xcode 附带的其他东西中两个数字之间的线性插值的方法?自己实现并不是什么高级的事情，但我通常会发现自己重新实现了已经实现的东西，并且使用已经存在的功能很好(而且它更加标准化).

Just wondering if there are methods already implemented for handling linear interpolation between two numbers in foundation/something else that comes with Xcode? It's hardly an advanced thing to implement yourself, but I usually find myself reimplementing things that have already been implemented, and it's nice to use functionality that already exists (plus it's more standardized).

所以我想要的是这样的:

So what I'd like is something like this:

lerp(number1, number2, numberBetween0And1);

// Example:
lerp(0.0, 10.0, .5); // returns 5.0

它存在吗?

推荐答案

不，但它很简单:

inline double lerp(double a, double b, double t)
{
    return a + (b - a) * t;
}

inline float lerpf(float a, float b, float t)
{
    return a + (b - a) * t;
}

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