Ossim is a simulation baking tool for Blender that generates an armature and skinned geometry based on rigid body physics simulation to use in game engines and realtime applications such as Unreal Engine 4 or Unity3d and many others.

Changelog

Version 1.4.0

• Blender 2.8+ API changes implemented (including outliner fixes)
• Added transformation cleaning options
• Fixed a bug with armature as parent always having OBJECT type.
• Minor bugfixes

Version 1.3.0

• Blender 2.8 support
• Bugfixes

Version 1.2.0

• Cloth simulations bake
• UI improvements
• Bug fixes

Version 1.1.0

• Code refactor
• Autokeyframing feature
• UI/UX improvements
• Bug fixes for armature generation

Installation

• Put python file inside Blender scripts folder (Blender\2.**\scripts\addons)
  • OR simply press Install Addon From File button in Addons tab (Preferences)
• Enable addon by clicking on checkbox

How to use

• Bring any mesh to blender and break it however you want You can use built-in Blender addon called Cell Fracture You can also use PhysAssist addon
• Set rigid body physics for all geometry pieces you want to simulate. You can make simulation conditions as complex as you like (adding wind, vortex or another rigidbody colliding with your mesh)
• Select just geometry you want to bake. Move it to separate layer for convenience.
• Specify target layer for skinned geometry.
• Run armature generation (Tool located under Tools->Misc->Ossim)
• After you have got armature you can keyframe it in Pose Mode.
• Select armature and skinned mesh and export it.

Discussion

• You can reach me on twitter: @GubinPetr
• Polycount forum thread: https://polycount.com/discussion/202266/ossim-rigid-body-simulation-baking-for-blender
• BlenderArtists forum thread: https://blenderartists.org/t/addon-ossim-bake-rigidbody-simulation-to-armature-ue4-unity/1115900