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gubar
03-30-2007, 10:28 AM
Hello,

I'm rigging a character to animate and have a fairly good 18 bone skeleton inside him. I rigged him with his arms out at 90', and as I lower them, his chest/torso under his arm cave in. I've experimented with weight maps with limited success... I can't find tutorials specifically on this aspect of rigging for animation.

Can anyone offer advice, or point me towards some good tutorials?

Thanks,

Gubar.

Dirk
03-30-2007, 10:52 AM
Here's a nice video tut about character rigging. It's not about weight maps, but may help anyway.



http://ikboost.com/learn/video-tutorial-introduction-to-ik-boost-part-3-character-rigging/

hrgiger
03-30-2007, 11:06 AM
Your problem is easily solved and you don't need a tutorial either.

Your arm bone is having influence over the mesh on the torso. You can do one of two things.

You can place a holder bone in the area that is caving in and parent it to a bone that is in your torso such as a spine bone so that it moves with the torso. No weighting is required.

You can fix your weighting. If you've weighted properly, the area shouldn't cave in. It sounds like your arm bone is influecing the mesh on the torso. Make sure the the arm bone is set in the bone proprties panel to use the weight map you have set for your arm. And be sure that your weights are set to 100%(additive if there is more then one weight map applied to an area).

If you can figure it out, post the scene and object file or send me a pm and I'll tell you where you can send the files and I'll tell you what is wrong with them.

gubar
03-30-2007, 11:18 AM
Thanks to you both - my first post here and I've gotten 2very quick responses.

I'll try that tutorial, and later I'll check my weight maps on those points - and, I hadn't even thought of inserting another bone in the torso to prevent the caving in.

Regards,

Gubar..

hrgiger
03-30-2007, 11:29 AM
No problem. Also above, I meant if you CAN'T figure it out you can send me the files, not if you CAN.

Surrealist.
03-30-2007, 01:09 PM
Thanks to you both - my first post here and I've gotten 2very quick responses.

I'll try that tutorial, and later I'll check my weight maps on those points - and, I hadn't even thought of inserting another bone in the torso to prevent the caving in.

Regards,

Gubar..


If you want to work with weight maps, Timothy Albee's Character Animation is a great book. It takes you quite thoroughly through the rigging process.

SplineGod
03-31-2007, 12:19 PM
I recommend you look at weight maps as something you do last in the rigging process. The reason is because LW bones are deformers already and they have a few settings that help how they influence geometry. Once you have your basic bones in you test them as you did. Once you see where your character is deforming badly then you can determine if adding hold bones, tweaking bone settings etc are they way to go vs using weight maps. In the end you may find that you either dont need any weight maps or that you only need a few very simple ones. Either way it reduces the time spent.

Ive also got quite a bit of material on rigging for animation and rigging for deformations along with support.
http://www.3dtrainingonline.com/professionalcharacterseries.htm
I also have this:
http://www.3dtrainingonline.com/fundamentals_of_rigging_vol1.html
Heres a video demonstrating the rig created in this 10 hr video:
http://www.3dtrainingonline.com/examples/char_rig_demo.zip

gubar
04-01-2007, 04:21 AM
More replies and advice - thanks guys, I'll be checking those references out.

Regards,

gubar.