Matrix.to2d

bool to2d(out double xx, out double yx, out double xy, out double yy, out double x0, out double y0)

Converts a #graphene_matrix_t to an affine transformation matrix, if the given matrix is compatible.

The returned values have the following layout:

⎛ xx  yx ⎞   ⎛  a   b  0 ⎞
 ⎜ xy  yy ⎟ = ⎜  c   d  0 ⎟
 ⎝ x0  y0 ⎠   ⎝ tx  ty  1 ⎠

This function can be used to convert between a #graphene_matrix_t and an affine matrix type from other libraries.

`xx`	return location for the xx member
`yx`	return location for the yx member
`xy`	return location for the xy member
`yy`	return location for the yy member
`x0`	return location for the x0 member
`y0`	return location for the y0 member

true if the matrix is compatible with an affine

transformation matrix