A vector magnitude is a few adds and multiplies, but crucially a square root; and that last bit is expensive, particularly when you’re doing it inside a loop over thousands of entities, possibly multiple times per frame. In reality, we use a vector’s…

For a while we've been writing graphics rendering code twice, for both Metal and OpenGL. I was tired of maintaining two different backends that want to do the same thing, and since december I started writing a graphics abstraction layer as a side pro…

It’s been a while since I wanted to revisit our game’s collision-detection system to give it a little boost, but I dragged my feet before rolling up my sleeves—anything to do with collisions always fries my brain. What we had before was fairly simple…