OpenEuphoria

Re: trig

• Posted by akusaya at gmx.net Apr 19, 2004
• 608 views

Try this function:


function angle(object x, object y)
    if x = 0 then
        return (y > 0) * 180
    end if
    return arctan(y/x) * 180/PI + 90 + (x < 0) * 180
end function




L> Howdy folks,

L> It seems I always forget my trig when I need it.
L> Quick question:

L> How do I calculate an angle in degrees given an x,y vector.
L> The vector for 0 deg being {0,-1}
L> 90 deg would be {1,0}; 180 = {0,1}; etc...

L> atom angle
L> sequence vector
L> vector = {-0.38,-0.92}
L> angle = ?

L> thanks for any help,
L> Lewis Townsend

L> BTW is there a website that has all the math formulas, trig esp?