Get rotation from a vector?

BlitzMax Forums/BlitzMax Programming/Get rotation from a vector?

elcoo (Posted 2009) [#1]

Hi, let's say I've got an image and a vector ([0.4,0.6] for example) that i'm moving the image along. How can I get the angle that the image needs to be rotated to point in the vectors direction? Must be something with sinus and cosinus but I can't figure out the correct formula. Maybe you can help me?

BladeRunner (Posted 2009) [#2]

atan(.6/.4) will return the angle for the above example.

_Skully (Posted 2009) [#3]

Ang=Atan2(x,y)

GfK (Posted 2009) [#4]

Ang=Atan2(x,y) y,x.

plash (Posted 2009) [#5]

y,x

elcoo (Posted 2009) [#6]

Thanks all! Didn't even know about this command.