calculateMassInfo method
Calculate the mass information of the shape.
Implementation
@override
void calculateMassInfo(MassInfo out ) {
final mass = width * height * depth * density;
const divid = 1/12;
out.mass = mass;
out.inertia.setValues(
mass * ( height * height + depth * depth ) * divid, 0, 0,
0, mass * ( width * width + depth * depth ) * divid, 0,
0, 0, mass * ( width * width + height * height ) * divid
);
}