cv/mgflib/iesnotes.txt

                Enclosing IES File Notes
                RCSid "$Id$"

The following notes describe how MGF data is to be referred to by
an enclosing IES luminaire file, and these notes are in a state of flux.

The basic method for specifying an MGF geometry file within an IES
file is a single line immediately preceeding the TILT= line, which reads:

GEOM=file.mgf

where "file.mgf" is replaced by the name of the relevant MGF file.

IES data file contains simplified geometry, which must completely
enclose the detailed geometry specified by the "GEOM=file.mgf" line.
This detailed geometry file is always in meters, whatever the units of
the enclosing IES file, and must have its origin at the center of the
simplified geometry.  The X-axis corresponds to the 0-180 degree plane,
the Y-axis corresponds to the 90-270 degree plane, and the Z-axis
corresponds to the up direction.  (This is a right-handed coordinate
system.)

The emission values in the MGF file will be multiplied by the usual
IES luminaire factors, i.e. the tilt factors (if any), the candela
multiplier, the ballast factor and the ballast lamp factor.  Thus,
the MGF file emissions should correspond to those of the as-tested
luminaire configuration.
Revision:	1.2
Committed:	Fri Feb 28 20:19:26 2003 UTC (22 years, 8 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad5R4, rad5R2, rad5R3, rad5R0, rad5R1, rad4R2, rad3R7P2, rad3R7P1, rad6R0, rad4R1, rad4R0, rad3R5, rad3R6, rad3R6P1, rad3R8, rad3R9, rad4R2P1, rad4R2P2, HEAD
Changes since 1.1:	+1 -1 lines
Log Message:	Fixed RCSid's
#	User	Rev	Content
1	greg	1.1	Enclosing IES File Notes
2	greg	1.2	RCSid "$Id$"
3	greg	1.1
4			The following notes describe how MGF data is to be referred to by
5			an enclosing IES luminaire file, and these notes are in a state of flux.
6
7			The basic method for specifying an MGF geometry file within an IES
8			file is a single line immediately preceeding the TILT= line, which reads:
9
10			GEOM=file.mgf
11
12			where "file.mgf" is replaced by the name of the relevant MGF file.
13
14			IES data file contains simplified geometry, which must completely
15			enclose the detailed geometry specified by the "GEOM=file.mgf" line.
16			This detailed geometry file is always in meters, whatever the units of
17			the enclosing IES file, and must have its origin at the center of the
18			simplified geometry. The X-axis corresponds to the 0-180 degree plane,
19			the Y-axis corresponds to the 90-270 degree plane, and the Z-axis
20			corresponds to the up direction. (This is a right-handed coordinate
21			system.)
22
23			The emission values in the MGF file will be multiplied by the usual
24			IES luminaire factors, i.e. the tilt factors (if any), the candela
25			multiplier, the ballast factor and the ballast lamp factor. Thus,
26			the MGF file emissions should correspond to those of the as-tested
27			luminaire configuration.