vertex to bones connections

butthead_82 · Post by **butthead_82** » Wed Oct 22, 2008 9:21 am

Hi,

I'm interested in how many bones can a vertex be attached to in Irrlicht?
That is...how many bones can affect a vertex transformation?

Thanks for help

Acki · Post by **Acki** » Wed Oct 22, 2008 11:03 am

AFAIK a vertex can only be attached to one bone...

butthead_82 · Post by **butthead_82** » Wed Oct 22, 2008 11:59 am

Acki wrote:AFAIK a vertex can only be attached to one bone...

Thanks for answer Acki.

I'm trying to implement face animation with Irrlicht. With "vertex to one bone" engine support I can use body animation, but to animate face I would need better support.

Do you know someone on forum I could ask to confirm this (you said you weren't sure)?

JP · Post by JP » Wed Oct 22, 2008 12:40 pm

I would say you can have more than one bone affecting a vertex.... it would be rather limiting if you couldnt'!

butthead_82 · Post by **butthead_82** » Wed Oct 22, 2008 1:37 pm

JP wrote:I would say you can have more than one bone affecting a vertex.... it would be rather limiting if you couldnt'!

It would be limiting, yes.
Another problem is I cannot load .X file because that model's vertices bind to more bones than Irrlicht supports (at least that's what I think is the problem).
That's why I need to know how many binds Irrlicht handles. (I know Ogre supports 4, for example).

sudi · Post by **sudi** » Wed Oct 22, 2008 5:21 pm

are X-Files in text or binary form? Irrlicht only supports text format.

butthead_82 · Post by **butthead_82** » Wed Oct 22, 2008 6:35 pm

Sudi wrote:are X-Files in text or binary form? Irrlicht only supports text format.

It is in text form.
It's not that Irrlicht cannot read the file. It starts reading it and then crashes saying: "X loader: weight id out of range" (I asked about this already but nobody answered

)

hybrid · Post by **hybrid** » Wed Oct 22, 2008 8:20 pm

Irrlicht can also load binary .x files. The error might also be fixed in SVN/trunk already, because we made some fixes to the loaders in the past. Can you share an example for this problem?
Oh, and there should be no limit on the number of bones and weights IIRC.

butthead_82 · Post by **butthead_82** » Wed Oct 22, 2008 8:58 pm

hybrid wrote:Oh, and there should be no limit on the number of bones and weights IIRC.

Glad to hear that.

hybrid wrote:Can you share an example for this problem?

I'm not sure if I'm allowed to share that model

I'll have to check.

butthead_82 · Post by **butthead_82** » Thu Oct 23, 2008 10:37 am

I downloaded new version of Irrlicht from svn. This version loads the model but the mesh is messed up. I tried another model, it loads the mesh correctly but without bones... I guess they get messed up during conversion.

p.s. How do I upload file on this forum? (sorry for noob question, I would like to upload these models but can't figure out how)

JP · Post by JP » Thu Oct 23, 2008 10:47 am

use a file hoster like mediafire, rapidshare, megaupload, yousendit etc and then post the resulting link

butthead_82 · Post by **butthead_82** » Thu Oct 23, 2008 11:31 am

http://rs273.rapidshare.com/files/156756682/dubravka.X

Here is the model ...but I think it is messed up by exporter, not Irrlicht. This svn version works fine...it doesn't report that weight id error any more.

JP · Post by JP » Thu Oct 23, 2008 11:36 am

What's your modelling package and what exporter?

butthead_82 · Post by **butthead_82** » Thu Oct 23, 2008 11:48 am

max 9, and panda exporter. I also have kwX but it doesn't work neither.

butthead_82 · Post by **butthead_82** » Thu Oct 23, 2008 5:12 pm

I tried exporting a model from Truespace7.6. The model is fine and Irrlicht loader works fine and loads it (didn't load the textures though...)
Anyway, it was that lame exporter that messed up my mesh. I'm switching to Truespace.

Thanks for help everyone.