Hm. So despite the fact that my vector calculations are very probably hacky and wrong, my next problem is with precision.
My map uses integers. Makes sense, it's a roguelike, so it needs whole X, Y (and Z, as I have depth) coordinates.
If I pitch -30 degrees at low velocity, my new Z-coordinate is: 0.0 < Z < 1.0. Which means I don't move. Or I round, and always move at least 1 square.
I'm going to have to convert everything to floats and translate to ints once position changes by >= 1.0. 🤣
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