more fun with vectors...whooohooo

Blitz3D Forums/Blitz3D Programming/more fun with vectors...whooohooo

Craig H. Nisbet (Posted 2008) [#1]

Last thing about vectors, I promice. How do I get the angle of vectorB relative to vectorA?

tonyg (Posted 2008) [#2]

atan2

Craig H. Nisbet (Posted 2008) [#3]

That doesn't really answer my question. Far as I can tell, that will give me the angle of a vector, which is great if your need angle relative to the world, but I need the angle relative to the angle of the first vector, vectorA. Or am I missing something.

big10p (Posted 2008) [#4]

Basically, subtract the angle of vectorA from the angle of vectorB. This will give the angle vectorA needs to be rotated by in order to match vectorB. There are actually 2 delta angles between vectors, though, so if you want the smallest one, you'll need to check if the delta is > 180 degrees.