[Radiance-general] Re: Radiance-general Digest, Vol 45, Issue 10

[jelle feringa]

Hi Thomas & Greg,

Many thanks for your suggestions here!

Thomas, the texture-based appraoch is something that came across my mind as
well.
The other thing that I was wondering about is whether the colordata
primitive might be relavant here?

For the textures based approach, probably ra_xyz is my friend here, though
I'm more wondering how I could generate the proper set of uv coordinates to
get the right mapping.
I'm not using textures in any sense, the use of per-vertex coloring is
closer to scientific data visualization.
Each vertex has a corresponding scalar value assigned to it, which is mapped
to a color value by a lookup-table, and the values of the lookup-table are
the ones I'm trying to map.

Many thanks for your suggestions!

-jelle

Nice to be right at least once but I was thinking of your mail
> about 'extraction of luminance values' from 17/08/2007, especially
> the part with the coloured 3D plot at the end.
>
> Reading it again it might not be that simple to apply to this
> problem, though. My idea was to read the colour value and save
> it to a known picture position, then assign this position as
> UV-coordinate to the mesh vertex. The picture used as texture
> should give the mesh the desired colouring.
>
> What I probably had in mind was something Blender users can do:
> create a mesh (example: a sphere), 'paint' a mouth, nose, eyes and
> hair onto the sphere in 3D and 'unwrap' it to a texture image.
> Then you can use Photoshop etc. to refine that sketchy image to
> a proper face texture.
>
> Applied here it would be:
>
> 1) get the mesh into Blender (...)
> 2) unwrap and save texture of vertex colours
> 3) export mesh to *.obj with uv-texture
> 4) convert texture image to *.pic
> 5) use obj2mesh to get shape and texture into Radiance
>
>
> Regards,
> Thomas
>
>
>
>
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