Can any one explain, how it's work? laugh i study bulldozer.c code, and i understand all except that one line:

//anim track:
my.u += 15 * player.force_left * time_step * (my.skill1 - 6) + 15 * player.force_right * time_step * (1 - my.skill1 + 6);

What's that "my.u"? and how this line make track actually looks like they're moving? shocked

The smaller the bug, the harder it is to kill.
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Forklift DEMO (3dgs)