ecotect export - missing surfaces

radiance-general
1

I'm having some problems exporting geometry from Ecotect - I'm trying to
model some external shades. I've tried to build them up as 3D surfaces
but when I export and render only the two side pieces are visible, the
small top, bottom, back and front faces do not appear. What am I doing
wrong?

http://ndoylend.fastmail.fm/temp/test_c.png

The rest of the Radiance/Ecotect files are in the same directory if
anyone wants to take a look.

Thanks for your help,

Nick

2

Hello Nick,

I downloaded your files and from looking at your geometry briefly I would say that Ecotect i.e. you created some very small polygons (0.0001 meters on one side) that Radiance considers zero-area polygons. When I run oconv or getbbox on your scene file I get 28 warnings like this one:

getbbox: warning - zero area for polygon "zone02.rad00000"

Looking at polygon zone02.rad00000 I find a valid polygon description but I guess Radiance has some limitation with regards to geometry. Are you sure you are modelling in the correct scale?

Regards,
Erwin

···

-------- Original Message --------
Subject: [Radiance-general] ecotect export - missing surfaces (18-Feb-2008 16:31)
From: Nick Doylend <[email protected]>
To: [email protected]

I'm having some problems exporting geometry from Ecotect - I'm trying to
model some external shades. I've tried to build them up as 3D surfaces
but when I export and render only the two side pieces are visible, the
small top, bottom, back and front faces do not appear. What am I doing
wrong?

http://ndoylend.fastmail.fm/temp/test_c.png

The rest of the Radiance/Ecotect files are in the same directory if
anyone wants to take a look.

Thanks for your help,

Nick

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Radiance-general mailing list
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To: [email protected]

3

Thanks very much Erwin. That seems to have been the problem.
Ecotect's Radiance output assumes the model dimensions are in
millimetres and by default scales everything it exports by 0.001. Turns
out I was modelling in metres. Oops.

Nick

···

On Tue, 19 Feb 2008 13:16:10 +0000, "Erwin Zierler" <[email protected]> said:

Hello Nick,

I downloaded your files and from looking at your geometry briefly I would
say that Ecotect i.e. you created some very small polygons (0.0001 meters
on one side) that Radiance considers zero-area polygons. When I run oconv
or getbbox on your scene file I get 28 warnings like this one:

getbbox: warning - zero area for polygon "zone02.rad00000"

Looking at polygon zone02.rad00000 I find a valid polygon description but
I guess Radiance has some limitation with regards to geometry. Are you
sure you are modelling in the correct scale?

Regards,
Erwin

-------- Original Message --------
Subject: [Radiance-general] ecotect export - missing surfaces
(18-Feb-2008 16:31)
From: Nick Doylend <[email protected]>
To: [email protected]

>
> I'm having some problems exporting geometry from Ecotect - I'm trying to
> model some external shades. I've tried to build them up as 3D surfaces
> but when I export and render only the two side pieces are visible, the
> small top, bottom, back and front faces do not appear. What am I doing
> wrong?
>
> http://ndoylend.fastmail.fm/temp/test_c.png
>
> The rest of the Radiance/Ecotect files are in the same directory if
> anyone wants to take a look.
>
> Thanks for your help,
>
> Nick
>
> _______________________________________________
> Radiance-general mailing list
> [email protected]
> http://www.radiance-online.org/mailman/listinfo/radiance-general
>
> To: [email protected]

_______________________________________________
Radiance-general mailing list
[email protected]
http://www.radiance-online.org/mailman/listinfo/radiance-general