VMD-L Mailing List

From: Luciano Abriata (luciano.abriata_at_epfl.ch)
Date: Thu Sep 19 2019 - 02:37:07 CDT

Ciao Walter,

I've been using obj+mtl files for some AR applications and indeed, the colour information of some objects, particularly meshes, is lost. Luckily, in HTML you can color-code the mesh ad hoc (this only works if you don't load the mtl file, thus leaving all materials free to be set from code). Maybe you can use a similar trick in the program you are using.

Note I have also seen some inversions going on in the meshes (like say x coordinates become -x) that I don't understand, but luckily HTML provides a way to re-invert them. I asked about these issues in this mailing list but apparently there's not much development going on.

Best

Luciano

________________________________________
De: owner-vmd-l_at_ks.uiuc.edu [owner-vmd-l_at_ks.uiuc.edu] en nombre de Walter Rocchia [Walter.Rocchia_at_iit.it]
Enviado: miércoles, 18 de septiembre de 2019 23:10
Para: vmd-l_at_ks.uiuc.edu
Asunto: vmd-l: exporting 3D model of a volume-based colored mesh

Hi,
I would like to export the mesh of a surface created in VMD and colored based on a electrostatic potential. The final aim would be to have a 3D model on it (e.g. a .u3d format)
I tried most of the output options provided by VMD, including wavefront .obj and .mtl files. When the surface is colored with a colorID, it seems to work.
In contrast, when I loaded these files in Meshlab, it seemed that the information of the color was missing?

Is there any way to do it correctly?

Thank you
Walter

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Walter Rocchia, PhD, Head
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