... of a given physical system was found. The problem is collisions... they are more problematic to do. The near-end of this little game is to get started with using Lagrangians in games; the far-end is to provide groung for creating a 3D rally game using Lagrange equations of motion, one that fixes certain shortcomings of the CTruck3D _Open .
Ah very much thank to the Maxima project !! Without that program the calculations would have been impossible to do!