QMedia Matrix commands

QM_TranslateMatrix

QM_TranslateMatrix(matrixRec; deltaH; deltaV):error
matrixRec Array real Matrix record
deltaH Real Horizontal delta
deltaV Real Vertical delta
error Longint Error result

Adds a translation transformation to a matrix record.

Parameter matrixRec specifies the matrix. It must be declared as a 3 x 3 array of reals. QMedia updates and returns the contents matrixRec with the specified translation operation.

Parameters deltaH and deltaV specify the horizontal and vertical coordinate translation values respectively.

Example

  `Move track ID $trackID of movie $movie by 20 pixels horizontally and vertically
 
ARRAY REAL($matrix;3;3)
 
$err:=QM_GetTrackMatrix ($movie;$trackID;$matrix)
 
$err:=QM_TranslateMatrix ($matrix;20;20)
 
$err:=QM_SetTrackMatrix ($movie;$trackID;$matrix)
 

Related commands

QM_SetIdentityMatrix Sets the contents of a matrix record to the identity matrix.
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.
QM_SetTrackMatrix Changes the track's transormation matrix.
QM_GetTrackMatrix Returns the track's transormation matrix.

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