NAV (file format)
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Not to be confused with AIN.
A NAV file is a map specific Navigation Mesh file that defines the walkable space in a level for bots in Source games. They usually reside in <game folder>/maps and can be integrated into BSPs in some Source games.[Clarify]
In Template:Game name and Template:Game name, the file is generated automatically when bots are played for the first time on a specific map.
Tip:NAV creation is an open-source task available in the SDK.File format
Note:This is reverse engineered data. Reverse engineered format code can also be found here.unsigned int magicNumber; // Magic number to check if the file is a .nav file
unsigned int version; // Version of the .nav file, for example GMod and TF2 has 16
if ( version >= 10 ) {
unsigned int subVersion; // Sub version of the .nav file, for example GMod has 0, TF2 has 2. This is usedt
}
if ( version >= 4 ) {
unsigned int saveBspSize; // Size of source bsp file to verify that the bsp hasn't changed
}
if ( version >= 14 ) {
unsigned char isAnalyzed;
}
if ( version >= 5 ) {
// Places data. This is the "Mid", "Banana", etc stuff that is used in this nav mesh
unsigned short count;
for( int i = 0; i < count; ++i ) {
unsigned short len; // length of the name
char name[len]; // The name. Maximum len is 256
}
if ( version > 11 ) {
unsigned char m_hasUnnamedAreas;
}
}
{
// Load custom data pre area
// This is by default is completely unused, it is left for mods to store custom data
}
unsigned int count; // number of CNavAreas
{
// PreLoadAreas( count )
// This is by default is completely unused, it is left for mods to store custom data
// Assuming that the data is per nav area
//for( int i = 0; i < count; ++i ) {
//}
}
for( i = 0; i < count; ++i ) {
// Per CNavArea data
unsigned int id; // ID of the CNavArea
// Attribute flags
if ( version <= 8 ) {
unsigned char attributeFlags;
} else if ( version < 13 ) {
unsigned short attributeFlags;
} else {
int attributeFlags;
}
Vector m_nwCorner; // size is 3 * float(x,y,z), North-West corner of the area
Vector m_seCorner; // size is 3 * float(x,y,z), South-East corner of the area
// More data...
}
if ( version >= 6 ) {
unsigned int count; // number of CNavAreas
for( i = 0; i < count; ++i ) {
// Ladder data
}
}
{
// Load Custom Data
// Again, by default this is unused
}