I have a 3D mesh in the form of .OBJ file, which is the best platform to tweak the mesh for some changes. By changes I mean I should be able to give the inputs to the mesh and it should perform the changes. My plain input could be like "lying down and crying !!" (may be in command line or command window) and the mesh should perform the action. Can any one suggest which step to take first?

Thanks for going through my question !