cap10subtext

So I've been toying with jit.gl.model and I have some observations and some questions. I have about 60 .obj models that I've been trying to get working in Max, some of them crash the program, most of them don't handle the textures properly. I've had some success with converting them for Max so I'd like to share this (maybe this is already posted somewhere so feel free to merge, move this thread):

1. I've been working with a lot of 3D scanned faces, but all of them just crashed when I loaded them into max. Turns out there was no groups label 'g' anywhere in the file. By just adding a group with a default name in textedit (something like: g faces), the models loaded no problem. If jit.gl.model parses the file, would it be possible to just add a default group if 0 are present, or at least not crash?

Error: model contains group with no triangles.

1. Had a very strange model that contained a g before and after all the vertices, but without a group name. I deleted the last "g" and added a name to the first one and it seemed to work fine.

If your "found" models aren't showing properly (all grey, no texture):

1. Open the .obj file in text edit. The mtllib path will often take the form ./mystuff.mtl which jit.gl.model will not understand. Delete './' and keep your .mtl and textures in the same directory as your .obj.

2. jit.gl.model doesn't seem to handle spaces in group names. Open your .obj file in text edit. Groups are represented by a single "g" followed by a name, replace all the spaces in the name with underscores (this can be tedious). Would it be possible to change the behaviour of jit.gl.model to accept spaces in the group names (maybe this has been updates as of 5.1.4, I only installed that recently).

3. Open your .mtl file, sometimes you will see that these values:

will be all 0.0. As a total modeling noob I know nothing about what these numbers actually do but as a hack, I've been able to apply these (or similar) values to replace the ones that are otherwise 0.

Question: there's a transparent texture that doesn't seem to be showing up in one of my models. Would this be a feature request I can make? I'll upload the model elsewhere and post the link it's too big for the forum.

So I've been toying with jit.gl.model and I have some observations and some questions.  I have about 60 .obj models that I've been trying to get working in Max, some of them crash the program, most of them don't handle the textures properly.  I've had some success with converting them for Max so I'd like to share this (maybe this is already posted somewhere so feel free to merge, move this thread):

If your found models crash max:
1. I've been working with a lot of 3D scanned faces, but all of them just crashed when I loaded them into max.  Turns out there was no groups label 'g' anywhere in the file.  By just adding a group with a default name in textedit (something like: g faces), the models loaded no problem.  If jit.gl.model parses the file, would it be possible to just add a default group if 0 are present, or at least not crash?

Error: model contains group with no triangles.
1.  Had a very strange model that contained a g before and after all the vertices, but without a group name.  I deleted the last "g" and added a name to the first one and it seemed to work fine.

If your "found" models aren't showing properly (all grey, no texture):
1.  Open the .obj file in text edit.  The mtllib path will often take the form ./mystuff.mtl which jit.gl.model will not understand.  Delete './' and keep your .mtl and textures in the same directory as your .obj.
2.  jit.gl.model doesn't seem to handle spaces in group names.  Open your .obj file in text edit.  Groups are represented by a single "g" followed by a name, replace all the spaces in the name with underscores (this can be tedious).  Would it be possible to change the behaviour of jit.gl.model to accept spaces in the group names (maybe this has been updates as of 5.1.4, I only installed that recently).
3.  Open your .mtl file, sometimes you will see that these values:

Ka  0.6 0.6 0.6
Kd  1.0 1.0 1.0
Ks  0.9 0.9 0.9

will be all 0.0.  As a total modeling noob I know nothing about what these numbers actually do but as a hack, I've been able to apply these (or similar) values to replace the ones that are otherwise 0.

Question: there's a transparent texture that doesn't seem to be showing up in one of my models.  Would this be a feature request I can make?  I'll upload the model elsewhere and post the link it's too big for the forum.


jit-gl-model-for-dummies-meaning-me

for transparent textures, you will probably need to enable the blend_enable and depth_enable attributes for the jit.gl.model object. i believe this is more of an open GL rendering criteria than a max / jitter issue.

i would say, for now, this is exactly what you need to do to successfully render models with jitter.

we are working on revamping the model loader for future versions of jitter.

Ka, Kd and Ks are ambient, diffuse and specular material values.

if you would like to send me one of your models that crashes (before applying your fixes) that could be helpful. please send all relevant material and texture files along with it. also, please let me know where it was exported from (which modeling software).

please send to ramirez _at_ cycling74.com

i would say, for now, this is exactly what you need to do to successfully render models with jitter.
we are working on revamping the model loader for future versions of jitter.

if you would like to send me one of your models that crashes (before applying your fixes) that could be helpful. please send all relevant material and texture files along with it.  also, please let me know where it was exported from (which modeling software).

jit.gl.model for dummies... meaning me. :)