well actually this is the same as gbmb.....except it moves but....i don't think its that great.....well nm its pretty cool but can't you just add this as a tmp2 function to gbmb?
Its one diffference......except that you can control its field.........so gbmb/gpmp.....still....no need for a new element.
i said gbmb doesn't move, and it doesn't have a controlled grav field, but its practically the same after that...nm....just make it.....nm about anything i said...
Maybe update gravity only every certian frame?