Thanks to Steven Curtis for this explanation of Bézier curves, the basis of most modern graphics UI.

Thanks to Steven Curtis for this explanation of Bézier curves, the basis of most modern graphics UI.

I especially like how he shows the 3 ways to handle the 3 point curves.

https://stevenpcurtis.medium.com/bézier-path-and-curves-using-core-graphics-268fbb77dd80