Segment

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