--- In [email protected], Jos Timanta Tarigan <jos_t_tari...@...> wrote: > > hi, > im currently having a problem try to calculate this: > directionZ = -cos((angleX+90)*PI_RADIAN); > most of the time it works but when im in the boundary of the coordinate, it > gives me a little error that im not expecting if calculated correctly.
Hi Jos - please can you show your code eg. are you using float or double? And do you mean sin, because cos(180 degrees) = -1, not 0. Where are you getting PI_RADIAN from?
