Some objects have bendable parts. It would be necessary to set up rigid bodies with constrains. Constraint types include the hinge, ball, slider and wheel that have the purpose of restricting abnormal object shape from occurring as well as encouraging the flexibility of object.
The ragdoll physics can be applied to entities that may have been thrown away by an explosion or fallen from a certain height.
Building the skeleton for the object could be challenging. Simulating the movement that goes along with the skeleton could prove even more challenging. Ragdoll physics is not only applicable to the human biped body or the animal multiped body, but also applies to any type of machinery.
However, this can be done by using Verlet integration. This technique uses the connection of arbitrary point between 2 character bone (e.g. knee, elbow) via some simple constraint to simulate the movement of bone joint.
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