Is there any library used to generate human figure?
Not that I know of. I think your best bet is to use a modeling utility that you know the file format for and build a human model. Then write a function to load that file.
But, what’s the best modelling available ??3DSmax is recommended ???
it’s hard to implement ???
Several good modelling tools available. 3D Max, LightWave, Maya, Truespace, etc. Big price variance however. Choice will likely depend more on price than features (at least it does for me). All have a learning curve. TrueSpace is pretty good and affordable. Max is awesome but expensive. Ditto Maya and Lightwave.
In this sources for ‘Skeletal Deformation’ you can move a whole human body: http://www.darwin3d.com/gamedev/gdm1099.zip
Perhaps you can use it…