This example shows the first step in modeling a rigid body. This model is a simple body (brick) with a frame at each of two ends and a reference frame at the center of mass. The inertia for the body is specified as Geometric Inertia with a constant density. The block automatically computes the appropriate inertia components. This serves as a first approximation of the actual rigid body. In subsequent iterations more detail can be added to obtain a more accurate model of the actual rigid body. See the example sm_compound_body for a more detailed model of the rigid body.