This is my first assignment from the Advanced 3D Character Animation class. I read that this type of workflow is good for cartoony-style animation.
Procedural sketching with Harmony
Harmony is by Ricardo Cabello and you can play with it here: http://mrdoob.com/projects/harmony/
He makes available a list of third-party Harmony ports for iPhone and Android here: http://mrdoob.com/blog/post/696
