| 3 | | Just in case this has gotten lost in translation, this is just for the NIH3D presets, not a general requirement for ChimeraX (as far as I know). Everything but this one type of component are vertex colored including single color objects like bonds in the preset. I’ll let victor fill in the specifics of our software or hardware limitations for color. |
| | 3 | Kristen: Everything needs to be vertex colored for 3d printing. I only used blender to illustrate the problem. Our printers cannot read material colors, everything has to be per-vertex for printable color models or they will come out white. |
| | 4 | |
| | 5 | Tom: Do your printers directly accept GLTF format? I am wondering what software only accepts vertex colors. Most software does not accept GLTF vertex colors. So it is a twist that there is also software that only accepts vertex colors. I can make ChimeraX have an option to save GLTF with all objects using vertex colors. But I want to understand what software requires this. We have an amazing array of GLTF saving options in ChimeraX already because of various software packages not being able to handle various legal GLTF files, and I at least want to understand what software is causing the problem. Thanks. |
| | 6 | |
| | 7 | Kristen: The printers take wrl or ply for color printing. We don’t use the glb directly, we always have to convert for printing. I think glb was requested from chimera x exclusively due to the viewer, but if I had been the one to make the call, I would have said dae because glb has limited support and we can convert to glb on our end. |
| | 8 | I don’t use the printers or printer software directly, but our printers are quite old, so that may be part of where this requirement comes from. We can follow up with Meghan and Phil to make sure they’ve checked with victor that this requirement is still valid. |
| | 9 | |
| | 10 | Tom: So the printers don't use .glb files -- not surprising. We need to know exactly what software is imposing a requirement for vertex colors. Is the conversion program from .glb to wrl or ply causing the problem, or is the printer itself not liking the wrl or ply file? I'm very reluctant to produce hacked GLTF output that is all vertex colors that almost no software can handle just so some broken downstream software that only handles vertex colors is happy. I can do that but we need a complete understanding before producing these unusual vertex-color only GLTF files that are likely to cause problems in the future because most programs won't read vertex colors. |
| | 11 | |
| | 12 | Kristen: Just in case this has gotten lost in translation, this is just for the NIH3D presets, not a general requirement for ChimeraX (as far as I know). Everything but this one type of component are vertex colored including single color objects like bonds in the preset. I’ll let victor fill in the specifics of our software or hardware limitations for color. |
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