rotation parameter has no effect on RegularPolyCollection

[mdboom]

It looks like the rotation parameter in RegularPolyCollection was disconnected in the following commit: b8726d0

Below is an example that should display squares with different rotations, but doesn't on master or 1.4.0.

import matplotlib.pyplot as plt
from matplotlib.collections import RegularPolyCollection
import numpy as np


xx, yy = np.mgrid[:10, :10]
xy_points = np.transpose([xx.flatten(), yy.flatten()])
rotations = np.linspace(0, 2*np.pi, len(xy_points))

fig, ax = plt.subplots()
for xy, alpha in zip(xy_points, rotations):
    col = RegularPolyCollection(4, sizes=(100,), rotation=alpha,
                                offsets=xy, transOffset=ax.transData)
    ax.add_collection(col, autolim=True)
ax.autoscale_view()

plt.show()

[mdboom]

@tonysyu: This still needs a test, but could you confirm the attached resolves the issue for you?

[tonysyu]

@mdboom: 👍

[tacaswell]

Could the test be modified so more of the marker is shown?

[mdboom]

Oops -- forgot to do autoscale_view. Looks much better now.