Reading a imported obj file in G'MIC

Software G'MIC
1

When I do input file.obj in G’MIC cli, it goes directly to the 3D viewer, meaning I have no context on how to read the file.

If I do echo {crop(#-1)}, I see this for a box:

67,73,109,103,51,100,12,6,1,1,-1,1,-1,-1,1,1,1,1,-1,1,-1,1,-1,-1,-1,-1,-1,1,1,-1,-1,1,1,1,-1,1,1,1,-1,1,-1,-1,1,1,4,3,2,6,7,4,7,6,4,5,4,5,1,3,7,4,1,0,2,3,4,5,4,0,1,4,8,10,11,9,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,200,1,1,1,1,1,1

What do these numbers mean?

Finally, 3d viewer doesn’t show with material to me. How do I make sure material is viewable? All I did was changed diffuse color on a detached face of a box, but nothing shows up.

2

This : G'MIC - GREYC's Magic for Image Computing: A Full-Featured Open-Source Framework for Image Processing - Managing 3D Vector Objects

A 3D mesh is stored as a one-column image, where all the information are stored. See link above to get the details on how data are stored.