Nav Mesh

A Navigation Mesh (or shorter: nav mesh) represents the "walkable areas" of a map. This data is required by Bots and Hostages in Counter-Strike: Source and Counter-Strike: Global Offensive , and all NextBot entities in Left 4 Dead , Left 4 Dead 2 , Garry's Mod and Team Fortress 2 , allowing them to "know" where they can go and how to move around in the environment.

NAV files

Main article:  NAV

Navigation Mesh data is stored in a NAV file corresponding to the map file (.bsp) for which it is used. For example, the nav mesh for cstrike\maps\de_dust.bsp is stored in cstrike\maps\de_dust.nav.

Navigation Mesh Editing

Main article:  Nav Mesh Editing

Main article:  Nav Mesh Commands

The Navigation Mesh Editing is done in-game. A (new) .nav file can be generated with nav_generate (which requires sv_cheats 1 and nav_edit 1).

Game Specific SubVersions

Game	Known as	Subversion	Notes
Garry's Mod	TheNavMesh	0	Garry's Mod is using the base navigation mesh(It doesn't use it's own implementation unlike Valve games)
Counter-Strike: Source	CSNavMesh	1
Team Fortress 2	CTFNavMesh	2
Left 4 Dead	TerrorNavMesh	13
Left 4 Dead 2	TerrorNavMesh	14
Counter-Strike: Global Offensive	CSNavMesh	1	(Ported from Counter Strike: Source?)

See also

• Navigation Mesh Console Command Reference
• Left 4 Dead Navigation Meshes
• L4D Level Design/Nav Meshes
• L4D Level Design/Nav Flow
• L4D Level Design/Advanced Nav Editing

External Links

• Official forums for the bot system (down) - Archived version.
• Waypointing for CS:S Bots/Hostages (Edit Life)