This is an interesting new development in Croquet and will add huge potentials to the building capabilities in Croquet.
An excerpt -
Aik-Siong Koh and other Malaysian programmers are developing an in-world 3D modeling tool for Croquet. As a first step, they are porting freeCAD into Croquet. freeCAD is a basic 3D CAD with advanced motion simulation capabilities. freeCAD was developed as a tool for teaching and learning geometry, kinematics, dynamics, vibrations, mechanisms, linkages, cams, machine design and physics. It offers users the ability to create and manipulate assemblies of simple 3D solids that can be connected by joints, constraints, contacts, motors, actuators, springs, dampers, forces, torques or gravity. Read more