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| Name | Last modified | Size | Description |
|---|---|---|---|---|
| Parent Directory | - | ||
| illumin_cz.gnp | 2014-07-04 18:59 | 1.2K | |
| illuminanceP.gnp | 2014-06-25 19:07 | 1.6K | |
| illuminance.gnp | 2013-05-06 13:30 | 1.5K | |
| illumin_cz.pdf | 2013-02-08 11:15 | 8.1K | |
| illuminance.pdf | 2012-11-27 19:58 | 11K | |
| illuminance.png | 2012-06-18 22:48 | 7.9K | |
| space_a15dg2.png | 2006-11-27 18:49 | 9.9K | |
| space_a15dg.png | 2006-11-27 18:49 | 9.5K | |
| space_a15.png | 2006-11-27 18:49 | 9.9K | |
| space_ang15.gnp | 2006-11-27 18:49 | 1.5K | |
| space_a30dg2.png | 2006-01-04 11:03 | 10K | |
| space_a30dg.png | 2006-01-04 11:03 | 10K | |
| space_a30.png | 2006-01-04 11:03 | 10K | |
| space_an_dg2.png | 2006-01-04 11:03 | 11K | |
| space_angle.png | 2006-01-04 11:03 | 11K | |
| space_an_dg.png | 2006-01-04 11:03 | 11K | |
| space_angle.gnp | 2006-01-04 11:00 | 1.5K | |
| space_ang30.gnp | 2006-01-04 11:00 | 1.5K | |
It is amazing, how well a planar approximation of pi*r^2 works... The graphs going just to 30 degrees radius show, that up to 15 degrees, even cosine correction (giving illuminance of a plane) is completely negligible.
*.gnp are programs which have produced the resulting *.png by a command like
gnuplot space_angle.gnp
– it's easy to adapt them to produce scalable PostScript output instead.
(made by Jan Hollan, subject to GNU public license)