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I'm coding a feature-light clone of Star Castle at the moment, but it's stretching my rather appaling maths abilities past their limit; so, anybody know of a good online resource for brushing up on maths skills?


My stumbling block at the moment is determining the changes to make to the player's velocity, from the direction they're facing when thrusting - I know I could just code an if() containing some basic trigonometry, but I'd rather take the shorter, maths-only, path...
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