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Combined if statements and simplified trig. cos(atan2(y,x)) = x / sqrt(x^2 + y^2) and sin(atan2(y,x)) = y / sqrt(x^2 + y^2).
Combined if statements and simplified trig. cos(atan2(y,x)) = x / sqrt(x^2 + y^2) and sin(atan2(y,x)) = y / sqrt(x^2 + y^2).