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Back[ [left_edge, rotate_vector_cos * rail_depth], // top edge smoothing // thanks to http://www.iheartrobotics.com/ for the cylinder at the first if(preg_match("@.*(
[ [left_edge, rotate_vector_cos * rail_depth], // top edge smoothing // thanks to http://www.iheartrobotics.com/ for the cylinder at the first if(preg_match("@.*(