LAYOUT_DRIVE_3
defdrives /= LAYOUT_DRIVE_3 + LAYOUT_DRIVE_GAP;
if (dnlen < LAYOUT_DRIVE_3 - 6)
(LAYOUT_DRIVE_3 - 1 - dnlen - 1) / 2 - 1,
(LAYOUT_DRIVE_3 - 1 - dnlen - 1) / 2 - 1,
MIN(MAX((LAYOUT_DRIVE_3 - dnlen) / 2, 0),
LAYOUT_DRIVE_3) : 0),
if (dnlen < LAYOUT_DRIVE_3 - 6)
(LAYOUT_DRIVE_3 - 1 - dnlen - 2) / 2 - 1,
(LAYOUT_DRIVE_3 - 1 - dnlen - 2) / 2 - 1,