sure there is a way.
just create temp variables like you have already that use the current x,y,z (after that calc above) and simulate the next step.
With that simulation you are able to 1. predict z<0 if you need that or predict nearly anything else if the difference of the 2 positions is small enough :)
just create temp variables like you have already that use the current x,y,z (after that calc above) and simulate the next step.
With that simulation you are able to 1. predict z<0 if you need that or predict nearly anything else if the difference of the 2 positions is small enough :)