What point is used to be the center of the parametric inertia?

Question

I saw that using the parametric inertia block is the recommended setting for it. It helped to get more stability with trucks here.

Just one small question: what point is the center of that invisible box created by setting the dimensions of the chassi?

Is it the center of mass? Or the local position of the root vehicle object?

Answer 1

It's the center of mass.

The Parametric mode is a way of expressing the inertia of the vehicle as the inertia of a box of the given dimensions and a bias that favors understeer or oversteer. The visual gizmo just shows the dimensions of that box centered around the CoM of the vehicle. It may be hidden by collapsing the Inertia section in the inspector.