Error normalizing vertex bone weights. BoneWeightCollection does not contain any weighting values.  

Hi,

I think that you want to do bone animating (skinning) in a blender model.

I took so much time to solve this simple problem.

 

In fact, XNA don't allow that some vertex are not associated to a bone. To export it to be xna compliant, you need to take every vertex in the mesh and associate it to a vertex group then a bone. You shouldn't have a vertex which is not associated to a bone.

I think it might be a little stronger than that... every vertex needs to be assigned to exactly one bone. A bone can be associated with many vertices, but a vertex should only belong to one bone. Someone correct me if my info is old.

every vertex needs to be assigned to exactly one bone

There is no such requirement in XNA. In the regular content processor, a vertex can be weighted to at most 4 bones, but you can write your own processor that does more than that if you want to spend the vertex buffer size.

Ah, my mistake. Thanks.

This didn't solved my problem... Every vertex has a group. When I move the bone on Blender, all vertex follow the bone.

Well, I uploded the model files. This is simple rectangle with two bones. But have this problem always...

http://www.artike.frih.net/rectangle.blend
http://www.artike.frih.net/rectangle.fbx

What I did wrong? :-(

I've posted this on another thread but there is a script for Blender here (second script posted) that will identify wich vertices are not associated with a vertex group. Notice that you only want to check against the vertex groups that are asociated with bones, so when you run the script you have to deselect from the list any group that you have created, essentialy leaving only the vertex groups that have the same name as bones.

Thanks pnsm

Your scripts helped to understand why this happen and how to solve it. =)

Not my script just something I found when i stumbled on this problem, it helped me a lot so I thought it was a good idea to share it. :)

Hello,
I'm having the same problem in 3D Max 6 (panda exporter).
I downloaded a rigged mesh ("mazinger") from turbosquid & it throws this error in XNA.
Then I downloaded a non-rigged skeletton; I rigged it & get the same error. When I move the bones the correct parts of the mesh move as well.
I don't know how to know if there's anything missing...
Also I don't know what are "vertices groups" & if it's necesary to create them...

I just put the biped & scaled the bones to match the mesh the best as possible & I added a skin moifier adding the corresponding bones to each mesh part. Do I have to do extra tasks?
I can share with u the meshes if needed.

Thanks a lot!

Hello

Since over one week I'am trying to find out how to fix my model, but still got same problem with bone weights.

I anyone has this problem, and know how to fix it, even with this plugin that there was a link in this topic, then i described my problem a little more specific here.

I hope, than in next versions of XNA, bone weights in every vertex won't be necassary to loading model.

Thanks in advance

Regards David