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. i notice
that when my angleX is 90, and my directionZ should be 0. but the problem that
it is not since the precision given when multiplied by PI_RADIAN is not exactly
0. i track it and it seem to be a floating point precision error. instead of
having exactly 0, i got 0.000xxx.
any advice to avoid this error? how can i limit eg: remove everything from
third decimal?
first thing come up to my mind is to multiply by 1000, convert to int, divide
by 1000, but thats too long imo.
thanks in advance :)
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