26 Aug
2007
26 Aug
'07
9:27 p.m.
2007/8/27, Chaddaï Fouché
You've got a which is the radius of the circle, and b which is the length of the arc, thus you've got the angle between the two red radiuses : u = b / a So with basic trigonometry, we can deduce a - x = a * cos(u/2) x = a *( cos(u/2) - 1)
-- Jedaï
Actually that would be x = a * (1 - cos (b/(2a))) Ooops o_O -- Jedaï