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root/radiance/ray/src/cal/cal/lumdist.cal
Revision: 1.1
Committed: Sat Feb 22 02:07:21 2003 UTC (21 years, 1 month ago) by greg
Branch: MAIN
CVS Tags: rad5R2, rad4R2P2, rad5R0, rad5R1, rad3R7P2, rad3R7P1, rad4R2, rad4R1, rad4R0, rad3R5, rad3R6, rad3R6P1, rad3R8, rad3R9, rad4R2P1
Log Message:
Changes and check-in for 3.5 release
Includes new source files and modifications not recorded for many years
See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release

File Contents

# Content
1 {
2 Conversion from zonal lumens to watts/steradian
3 }
4
5 lum2watt(t0,t1,l) = l / 683 / (omega(t1)-omega(t0)) ;
6
7 omega(d) = 2*PI * (1-cos(d*PI/180)) ;