psMat

.. default-domain:: py

.. module:: psMat :synopsis: Provides quick access to some useful transformations expressed as PostScript matrices

.. function:: identity()

returns an identity matrix as a 6 element tuple

.. function:: compose(mat1, mat2)

returns a matrix which is the composition of the two input transformations

.. function:: inverse(mat)

returns a matrix which is the inverse of the input transformation. (Note: There will not always be an inverse)

.. function:: rotate(theta)

returns a matrix which will rotate by theta. theta is expressed in radians

.. function:: scale(x[, y])

returns a matrix which will scale by x in the horizontal direction and y in the vertical. If y is omitted, it will scale by the same amount (x) in both directions

.. function:: skew(theta)

returns a matrix which will skew by theta (to produce an oblique font). theta is expressed in radians

.. function:: translate(x, y)

returns a matrix which will translate by x in the horizontal direction and y in the vertical