Concatenating Transformations

When an application applies more than one transformation, it can concatenate the individual transformations to produce a final result. To concatenate transformations, multiply the individual transformation matrixes. The product of this multiplication is the concatenated transformation.

There are four ways the final matrix can be concatenated:

• Hard code the matrix values into the application, then call the transformation functions.

• Multiply the individual matrixes, then call the transformation functions.

• Use the helper functions with the TRANSFORM_ADD option, then call the transformation functions.

• Alternately apply transformation operations directly to the transformation matrix, then apply a transformation function.

Concatenating before calling provides better performance.