PHY

PHY is the extension for Source's proprietary collision model data format. It stores data for the rigid or jointed (ragdoll) collision model used by the MDL. In addition, it stores prop_data information about a model such as which gib-models to use if destroyed.

File Format

The first bytes of the file form the PHY header

struct phyheader_t
{
	int		size;           // Size of header after this point (generally 16 for a total size of 20)
	int		id;             // Often zero, unknown purpose.
	int		solidCount;     // Number of solids in file
	long	        checkSum;	// checksum of source .mdl file
}

Todo: Document headers for each solid

Todo: Document "old format" if VPHY is not seen

Todo: Document key-value data for each solid

See also

• Model Creation Overview