Julien Bayle

I'd need to load some obj on the fly, switch from one to another.

I was thinking about using drawing group but I didn't (even) have understood how to do that in meshlab (I'd "just" need to put my 30 .obj into one .obj (or .dae ?) and with each individual obj in one drawing group)

I also thought about using 30 jit.gl.model, and using a very basic [decode] object and enabling/disabling. But hey... 30 jit.gl.model is big.

I can't use jit.gl.model matrix output to mesh in that part of the patch as I need to use proper model's face informations (related to 

Hello,
I'd need to load some obj on the fly, switch from one to another.

I was thinking about using drawing group but I didn't (even) have understood how to do that in meshlab (I'd "just" need to put my 30 .obj  into one .obj (or .dae ?) and with each individual obj in one drawing group)

I can't use jit.gl.model matrix output to mesh in that part of the patch as I need to use proper model's face informations  (related to this post and I need gl.model for this)


What would you advice to me ?

Hello,
I'd need to load some obj on the fly, switch from one to another.
I was thinking about using drawing group but I didn't (even) have u

how-to-workaround-the-bottleneck-of-jit-gl-model-obj-reading-on-the-fly

Answering to myself: the best way I just benchmarked hardcorely is : 

--> creating group and drawing the group we want at each time is the fastest way (in my humble case)

With the (copynodestoclipboard) message, we can even have a way to control each mesh (each group) of the "only one time loaded" model in jit.gl.model <3 

https://cycling74.com/forums/jit-gl-model-several-groups-drawn-at-the-same-time

creating "group" is EASY in blender: import each obj, and it creates a layer in the scene, then export the whole as a dae or obj.

Answering to myself: the best way I just benchmarked hardcorely is : 

-->  creating group and drawing the group we want at each time is the fastest way (in my humble case)
With the (copynodestoclipboard) message,  we can even have a way to control each mesh (each group) of the "only one time loaded" model in jit.gl.model <3 
Thanks to the post https://cycling74.com/forums/jit-gl-model-several-groups-drawn-at-the-same-time too

You can also create drawgroups by manually selecting the faces of objects you want in a particular group in 'Edit' mode within Blender and then assign different materials to the selected faces(this will create a drawgroup for each differently assigned material).

Using this method you can split up a single model in Blender into different parts for Jitter, but it sounds like you needed something different which deals more with many different whole objects having a different group, so your way is probably fastest for that, just letting you know in case you ever need to get more specific on different faces within a single object: assigning different materials to different vertex groups in Blender will create a separate equivalent drawgroup for those in Jitter.

You can also create drawgroups by manually selecting the faces of objects you want in a particular group in 'Edit' mode within Blender and then assign different materials to the selected faces(this will create a drawgroup for each differently assigned material).
Using this method you can split up a single model in Blender into different parts for Jitter, but it sounds like you needed something different which deals more with many different whole objects having a different group, so your way is probably fastest for that, just letting you know in case you ever need to get more specific on different faces within a single object: assigning different materials to different vertex groups in Blender will create a separate equivalent drawgroup for those in Jitter.



Confirming after 2h testing, drawing group is the best solution between poly~ VS multiple jit.gl.model VS drawing groups, performance (and RAM) wise.

, I already had my .obj ready, aligned etc, just needed to put them into one "container" which is just another file (I chose COLLADA format).

Yes RR∆J∆ THE RESIDENT ∆LIEN, I already had my .obj ready, aligned etc, just needed to put them into one "container" which is just another file (I chose COLLADA format).

How to workaround the bottleneck of jit.gl.model OBJ reading on the fly ?