- distance
- The distance along the associated path
- matrix
- Allocated by the caller, this is set to the transformation associated with the position and tangent at the specified distance
- flags
- Specified what aspects should be returned in the matrix.
Documentation for this section has not yet been entered.
Pins distance to 0 <= distance <= getLength(), and then computes the corresponding matrix. Returns false if there is no path, or a zero-length path was specified, in which case matrix is unchanged.