Marker not round with markersize=3

[mdboom]

On 1.2.0rc2 the following example produces one round marker, and one diamond marker:

import matplotlib.pyplot as plt
import numpy as np

plt.xlim([1, 2])
plt.ylim([1, 2])
plt.plot(1.1, 1.1, 'ro', markersize=2.5)
plt.plot(1.5, 1.5, 'bo', markersize=3)
plt.plot(1.9, 1.9, 'ko', markersize=3.5)

plt.show()

Git bisect will be useful here, but I'm not sure this was even working in 1.1.0.

[mdboom]

This marker was set to perform pixel snapping about 3 px. That doesn't make much sense, given that it has bezier curves. I've fixed this in the attached commit.

[pelson]

Amazing response time! I'm happy enough to call this a bug fix and apply to 1.2.x. Would you agree?

[mdboom]

That was my thinking. I can't imagine anyone is relying on the "broken" behavior of a circle looking like a diamond. ;)

[mdboom]

Hold off on merging just a bit -- I think this may have affected some of the unit tests.

[mdboom]

This approach actually makes the circle marker much "fuzzier" looking at sizes of 6 or so and up, so I've modified this to only turn off snapping for smaller sizes. This also makes all of the tests pass with no changes.

[pelson]

Thanks @mdboom .