[Radiance-general] Re: luminaire modeling Was: set overflow in addobject

[Krzysztof Wandachowicz]

Hi Greg,

I've just made oconv process with success. First I tried to reduce number of
polygons without success. There is no way. The most important problem are
polygons in the center of my reflector. There are 360 triangles with common
vertex in optical axis which make a part of sphere with very small diameter
(1 cm). When I delete only these 360 triangles I can make oconv process.

The second notice is that there is no way to make oconv process with -r
bigger than 262144. I tried to make calculation with -r 393216 when I got
"set overflow in addobject" but then I've got "out of memory in emalloc" or
"system out of octree space". I the other words if it was not possible to
make calculation with -r 262144 it would no way to do it at all.

Best regards,

Krzysztof.

--
Krzysztof Wandachowicz
http://lumen.iee.put.poznan.pl/kw/

From: "Greg Ward" <gward@lmi.net>


> This is informative -- it looks to me like the density of polygons goes
> up dramatically near the center, and I suspect this is why oconv is
> unable to resolve your model.  Oconv has an upper limit to the number
> of polygons it will put in an octree voxel, and you are running into
> this limit with lower values of -r and running out of memory as it
> tries to resolve the mesh with larger values of -r.  The best solution
> would be to reduce the number of polygons you have in the center of
> your reflector, perhaps by going to a more sophisticated grid
> arrangement that what you have, which appears to be a uniform division
> of the polar coordinates.
>
> -Greg