nipy/PySurfer: Version 0.7

Support for Python 3.3 and up. A new alpha keyword to the Brain constructor now controls opacity of the rendered brain surface. The curv keyword to the Brain constructor has been deprecated. To replicate previous behavior when curv was set to True simply omit the curv keyword. To replicate previous behavior when curv was set to False, simply set the cortex keyword to None. To ease transition the curv argument will still be caught and processed, but it will be removed in a future release. The cortex keyword to the Brain constructor now also accepts a valid color specification (such as a 3-tuple with RGB values or a color name) to render the cortical surface in that color without rendering binary curvature values. Additionally it now also accepts a dictionary with keyword arguments that are passed on to the call to mlab.pipeline.surface. Brain.save_movie now uses the imageio library, eliminating the need to manually install ffmpeg. imageio has been added as an optional dependency which can be installed with $ pip install pysurfer[save_movie]. Brain.save_image now has the option to save with alpha channel and antialiasing