Here:
http://en.wikibooks.org/wiki/Blender_3D
the interesting part ends in a rather disappointing way:
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Laying down bones
More to come soon!
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Until more comes, here is a quick step by step to get you started..
For the irrlicht community, where the needed end result is movement in
format .x, a purpose oriented step by step cookbook, would be a
marvelous thing.
If someone with experience would take the time to explain what it
takes, to make two sections of a dummie mesh, move from side to side, it
would be an invaluable help.
The mesh could be as simple as this:
http://img215.imageshack.us/img215/5254/sections1xi.png
I would suggest a skeleton for the tutorial like this:
Import an obj/3ds file into blender *1
segmenting a mesh into moveable subsection in blender
adding bones to subsections
adding restraints to bones (limit the movements)
animating the bones and mesh
getting the frames (eg readout what frame numbers the animation covers)
export the animated mesh to a .x useable in irrlicht (link to exporters as well)
*1: Important because it would make it possible to use other 3d
modeling programs, like anim8tor, for the actual model work.
if someone would write this, OR! link to other tutorial that explain this,
and add it to the FAQ or the irr-wiki, it would be a tremendous help for all. I for one have definitively no idea where to start on mesh-animation with blender.