COIExtension

What is a COIExtension?

COIExtension is a object loader format used to store data related to Extension objects.

Structure

Size	Type	Name	Description
...	COICommon	Common	Variables common to multiple object loaders
1	Boolean	Has Animations	Whether or not this object has animations

The remaining data only exists if Has Animations is true

Size	Type	Name	Description
...	CAnimations	Animations	The animations attached to this object

This data always exists

Size	Type	Name	Description
4	Int32	Type	The type of the extension, unknown what this means

This data only exists if Type is -1

Size	Type	Name	Description
...	CString	Name	The name of the extension
...	CString	File Name	The file name of the extension
4	UInt32	Magic Number	The magic number of the extension, the usage of this is unknown
...	CString	Sub-Type	The sub-type of the extension, this allows a single mfx to store multiple object types, although I'm unsure if this allows for multiple objects to appear within Create New Object

The remaining data always exists

Size	Type	Name	Description
4	UInt32	Full Size	The size of the remaining data excluding itself
4	UInt32	Size	The size of the remaining data including itself
4	UInt32	Max Size	Usage is unknown, however the value is Size - 10
4	Int32	Version	The version of the extension property data
4	Int32	ID	Unknown
4	Int32	Private	The size of the header and any data between that and the property data
...	UInt8[]	Extension Data	Data exclusive to the extension, the length is Size - 20 (The size of the header)