Segment

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For more information on this article, visit the Seg page on the Doom Wiki.

Segs are to sub-sectors what linedefs are to sectors; they make up the shape of the sub-sectors. The most relevant information on them can be found on the NODES page.


Specification

Bytes Data type Description
0-1 Unsigned short Beginning vertex number
2-3 Unsigned short Ending vertex number
4-5 Signed short Angle: 0x0000 = East, 0x4000=North, 0x8000=West, 0xC000=South
6-7 Unsigned short Linedef number
8-9 Signed short Direction: 0 (same as linedef) or 1 (opposite of linedef)
10-11 Signed short Offset: distance along the linedef to the start of the seg