{ SCCSid "$SunId$ LBL" } { tilt.cal - tilt data for IES luminaires } tilt_ang = Acos(Kz) / DEGREE; tilt_xang = Asin(Jy/sqrt(Jy*Jy+Jz*Jz)) / DEGREE; tilt_ang2 = tri(tilt_ang, 90); tilt_xang2 = tri(tilt_xang, 90);