{ RCSid: $Id: tilt.cal,v 2.3 2003/02/22 02:07:23 greg Exp $ }
{
	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);
