EGMC (File Format)

The EGMC file format is in Metroid Prime 2 and 3. Its extension stands for Editor Object to Static Geometry Map Cooked. It's a simplistic format whose main responsibility is mapping PointOfInterest script objects to static world geometry, which allows world meshes to be scanned. The same POI can be mapped to multiple meshes, and likewise, the same mesh can be mapped to multiple POIs (which can be toggled on or off via script connections so only one POI is active at a time).

Format

This is an extremely simple format; it's just an array of a small struct mapping a surface group ID to a PointOfInterest instance.

Offset	Type	Count	Name
0x0	u32	1	Mapping Count
0x4	Mapping	Mapping Count	Mapping Array
End of file

Mapping

Offset	Type	Name	Notes
0x00	u32	Surface Group ID	Area-relative surface group ID.
0x04	u32	PointOfInterest Instance ID
0x08	End of mapping