Hi,
While playing a little bit with "custom_projection_example.py", I
found that "plot" command with projection="hammer" plots too many
markers.
For example,
subplot(111, projection="hammer")
grid(True)
p = plot([-1, 1, 1], [-1, -1, 1], "o")
show()
plots more than 100 circles, instead of 3. And I presume that this is
a bug not a feature.
This seems to be because the draw() method of the Line2D class uses
self._transformed_path for plotting Markers, but number of vertices
in the _transformed_path increases in the curved coordinate system as
in the example.
A patch to fix this is attached. It defines a new property
"self._transformed_path_mark" in the recache() method as follows
tr = self.get_transform()
self._transformed_path = TransformedPath(self._path, tr)
self._transformed_path_mark =
Path(tr.transform_non_affine(self._path.vertices))
and draw() method uses this for plotting markers.
tpath, affine = self._transformed_path_mark, \
self.get_transform().get_affine()
As I'm not 100% sure about how the transform things work, I may have
missed something. But I got correct results for cases I tried.
So I hope this patch is reviewed and applied.
Regards,
-JJ
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