JavaFX

JavaFX holds arbitrary affine transformations in an instance of the Affine class. Instead of operating on Affine objects, JOML's matrix classes can be used to build the transformations. When a matrix has been built in JOML, its represented transformation can be copied to an Affine instance like so:

Matrix4f m = ...; // <- any affine transformation built with JOML
Affine t = ...; // <- any JavaFX Affine instance
t.setToTransform(m.m00(), m.m10(), m.m20(), m.m30(),
                 m.m01(), m.m11(), m.m21(), m.m31(),
                 m.m02(), m.m12(), m.m22(), m.m32());

The above will copy any affine transformation, represented by the Matrix4f, to the provided Affine instance.

(Note: The Affine class uses a different order for the row and column indices of a matrix element. Here, the row index comes first, and then the column index)