Inside Macintosh: QuickTime /

Chapter 2 - Movie Toolbox / Movie Toolbox Reference

Matrix Functions /

ConcatMatrix

The ConcatMatrix function concatenates two matrices, combining the transformations described by both matrices into a single matrix.

pascal void ConcatMatrix (MatrixRecord *a, MatrixRecord *b);

a

Contains a pointer to the source matrix.

b

Contains a pointer to the destination matrix. The ConcatMatrix function performs a matrix multiplication operation, combining the two matrices, and leaves the result in the matrix specified by this parameter.

DESCRIPTION

The form of the operation that the ConcatMatrix function performs is shown by the following formula:

[B] = [B] x [A]

This is a matrix multiplication operation. Note that matrix multiplication is not commutative.

ERROR CODES

None