We get lots of these:
rtrace: warning - non-planar vertex for polygon "lyr_15_pol_158568312"
When using Radiance on models that we have generated using our Lightwave exporter.
These polys should all be "flat", but the exporter only has information down to 4 decimal points.
How flat does Radiance require polys to be before giving a warning?
Chris
Hi Chris,
The standard vertex epsilon in Radiance is set by the VERTEPS macro in src/common/face.c, and is 0.00001. In other words, any vertex that exceeds this difference from the average computed plane of the polygon will result in a "non-planar polygon" warning. Since your export only supports 4 decimal places, this will be triggered all the time. The only way to avoid this error is either to switch warnings off (as I often do with this problem), or change VERTEPS and recompile. Or, you can just ignore them. Warnings are mostly there in Radiance to let you know something is not quite right, so if you spot a problem later (like cracks along object edges in this case), you'll have some clue as to its origin.
-Greg
From: Christopher Kings-Lynne <[email protected]>
Date: January 23, 2005 5:26:19 AM PSTWe get lots of these:
rtrace: warning - non-planar vertex for polygon "lyr_15_pol_158568312"
When using Radiance on models that we have generated using our Lightwave exporter.
These polys should all be "flat", but the exporter only has information down to 4 decimal points.
How flat does Radiance require polys to be before giving a warning?
Chris