https://vexforum.com/gallery/showimage.php?i=159&catid=8
thanks to theotherguy, i now have some questions about their robot.
where did you get those wheels???
and do you know how to program a 4-wheel omni drive robot?
ps. that is a very nice robot :o
A thread already exists about this picture (if you scroll down below the image, the thread exists there.) 
According to the caption, the builder used the holonomic EasyC code I posted on ChiefDelphi. Holonomic and mecanum drives use exactly the same code; the only difference between the two is just the wheels.
my bad on creating this thread.
i have tried to make an omni drive code, but i was apparently nowhere close to what you have.