Interpolation

Interpolation (also known as lerping) allows the blending between two values. Where it really shines is when it is used over time to progressively reach some target value.

A simple implementation looks like this:

// Interpolate from a->b by amount (0..1)
const interpolate = (amount, a, b) => (1-amount) * a + amount * b;

In ixfx it’s found in the Module Numbers module as interpolate .

Run
import { interpolate } from "https://unpkg.com/ixfx/dist/numbers.js";
// Returns the value 50% between 200 and 400 (ie. 300)
interpolate(0.5, 200, 400);

ixfx has custom interpolation for Lines, Points & Colour.