hi, if you have 2 3d vectors U and V you can get the angle sine by: 1- normalize U and V 2- compute the cross product W = UxV 3- the angle sine is the length of W 4- use Math.asin() to get the angle from this sin.
I just realize there is simpler method: 1- normalize U and V 2- compute the dot product U.V , this is the value of cosine. 3- use Math.acos() to get the angle from this cos Hope it helps, Olivier Lehr, Ross (N-SGIS) a écrit :
Quick question... I know the Math.atan2 can get me an angle (in radians) using y,x. Can I also use atan2 to get a correct angle using z,x? or is there another way to get an angle when using the z coordinate? Thanks!! Ross _______________________________________________ Flashcoders mailing list [email protected] http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
-- Olivier Besson (gludion) - (33 1) 44 64 78 99 http://wwww.gludion.com http://blog.gludion.com _______________________________________________ Flashcoders mailing list [email protected] http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
