# NPC Definition
NPCs: their names, menu operations, combat stats, the models they are drawn from, and the forms
they can turn into.


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## NPCDefinition.Create
```pascal
function TNPCDefinition.Create(id, revision: Integer; const data: TByteArray): TNPCDefinition; static;
```
Decodes an NPC: its name and menu operations, its combat stats, its models and the forms it can
turn into.

`revision` is the archive's revision, which decides whether the head icons are stored as a
single sprite or as the per slot list that replaced it in build 1493.

When the stream doesn't set a footprint, it is worked out afterwards from the NPC's size the way
the client does it.

Example:
```pascal
archive := CacheReader.Indices[ECacheIndex.CONFIGS].ReferenceTable.Archives.Value[EConfigArchive.NPC];
def := TNPCDefinition.Create(3010, archive.Revision, archive.Files.Value[3010].Data);
```


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## TNPCDefinitionArray.IndexOf
```pascal
function TNPCDefinitionArray.IndexOf(id: Integer): Integer;
```
The position of `id` in the array, or `-1` if there is no such NPC.

NPC definitions are stored one per id with no gaps, so an id is its own index; this exists to
keep that assumption in one place.