Source code for toyplot.transform

# Copyright 2014, Sandia Corporation. Under the terms of Contract
# DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains certain
# rights in this software.

"""Functions for manipulating transformation matrices."""

from __future__ import division

import numpy

[docs]def rotation(angle): """Return a 2D transformation matrix. Parameters ---------- angle: number Rotation angle in degrees. Positive values produce counterclockwise rotation. """ theta = numpy.radians(angle) cos_theta = numpy.cos(theta) sin_theta = numpy.sin(theta) return numpy.matrix([[cos_theta, sin_theta], [-sin_theta, cos_theta]])