I'd finish your game and see if you need the extra speed afterwards.
It's easy enough to create a couple of arrays afterwards.
Personally I always just use sin() and cos() I've not noticed any massive speed hit and I don't think it's really worth worrying about until you're getting to optimisation right at the end of your project.
It's a bit like worrying about floats and ints... I don't... I just use them as necessary.
PCs are so quick now I don't think it's worth spending too much time optimising unless you can get an extra 10 or 20%. To get an extra 3 cycles in 200 hardly seems worth the effort.
It's easy enough to create a couple of arrays afterwards.
Personally I always just use sin() and cos() I've not noticed any massive speed hit and I don't think it's really worth worrying about until you're getting to optimisation right at the end of your project.
It's a bit like worrying about floats and ints... I don't... I just use them as necessary.
PCs are so quick now I don't think it's worth spending too much time optimising unless you can get an extra 10 or 20%. To get an extra 3 cycles in 200 hardly seems worth the effort.