matrix oppreparmtransform(string path)
matrix oppreparmtransform(string path, float time)
matrix oppreparmtransform(int opid)
matrix oppreparmtransform(int opid, float time)
Returns the pre and parm transform associated with an OP. If the specified OP has no transform associated with it (such as a COP), then an identity matrix is returned. It is possible to specify the time at which to evaluate the transform (in seconds, not frames).
The op: syntax can be used to simulate this behavior using the standard transform functions.