{ SCCSid "$SunId$ LBL" }

{
	tilt.cal - tilt data for IES luminaires
}

tilt_ang = Acos(Kz) / DEGREE;
tilt_xang = if(Jy*Jy-FTINY, Asin(Jy/sqrt(Jy*Jy+Jz*Jz))/DEGREE, 0);

tilt_ang2 = tri(tilt_ang, 90);
tilt_xang2 = tri(tilt_xang, 90);