Hi @vaporeon_ I forgot to ask last night if you were familiar with the formulas
sin(x + y) = sin(x)cos(y) + cos(x)sin(y)
cos(x + y) = cos(x)cos(y) - sin(x)sin(y)
?
@wallhackio I have heard of these formulae before, but I do not remember how to prove this...
re: math
@vaporeon_ in the end, though, you don't have to prove these if you want to know where a rotation matrix comes from. vaporeons are allowed to take the formulae for granted
re: math
@cam @wallhackio Are you aware of vectors and matrix-vector multiplication? For any amount of degrees θ, you can construct a matrix, such that if you multiply that matrix with a vector, the vector will be rotated by θ degrees. And such a matrix is called a rotation matrix, and it was very un-intuitive to me how that works... That's why I asked Clodsire to explain it.
My brain is currently feeling very scrambled, but I think it makes some more sense now after Clodsire's explanation.
re: math
@wallhackio @vaporeon_ I’m tired and I blacked out about 3 words in I’m sorry
re: math
@wallhackio @vaporeon_ I don’t even know what the fuck a rotation matrix is