QMedia Movie track commands |

### QM_GetTrackMatrix

QM_GetTrackMatrix(movieRef; trackID; trackMatrix):error
| movieRef | Longint | Movie reference
| trackID | Longint | Track ID
| trackMatrix | Array real | Track matrix
| error | Longint | Error result

Returns the transormation matrix of a track.

Parameter movieRef is the reference to the movie instance. The movie reference must have been previously obtained with a call to QM_NewMovieFromFile or QM_NewMovieFromURL.

Parameter trackID is the ID of the track.

Parameter trackMatrix receives the track's transormation matrix. The track matrix parameter must be declared as a 3 x 3 array of reals.

Example

``Get the transformationmatrix of track ID $trackID of movie $movie` `` `ARRAY REAL($matrix;3;3)` `` `$err:=QM_GetTrackMatrix ($movie;$trackID;$matrix)` ``

Related commands

QM_SetTrackMatrix | Changes the track's transormation matrix.
QM_SetIdentityMatrix | Sets the contents of a matrix record to the identity matrix.
QM_TranslateMatrix | Adds a translation transformation to a matrix record.
QM_ScaleMatrix | Adds a scaling transformation to a matrix record.
QM_RotateMatrix | Adds a rotation transformation to a matrix record.
QM_SkewMatrix | Adds a skew transformation to a matrix record.
QM_ConcatMatrix | Concatenates two matrices.

QMedia © Escape OE
Generated by QDoc 2.8 on Thu, Nov 24, 2011 18:41:19