The position of points in a shape key. The meaning of the data depends on the shape reference mode. To determine the reference mode, get the shape key's Cluster Key Reference Mode (KeyType).

• If the shape key is in Object reference mode (KeyType = 2), values are offsets from the undeformed point positions in the object's local coordinates.

• If the shape key is in Local reference mode (KeyType = 1), values are offsets from the undeformed point positions, but are expressed relative to each point's own referential (PointReferenceFrame).

• If the shape key is in Absolute reference mode (KeyType = 0), values are point positions (not offsets) in the object's local coordinates.