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Clarify current behavior of draw_path_collection. #21963

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Dec 16, 2021
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Clarify current behavior of draw_path_collection. #21963

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15 changes: 9 additions & 6 deletions lib/matplotlib/backend_bases.py
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Original file line number Diff line number Diff line change
Expand Up @@ -223,12 +223,15 @@ def draw_path_collection(self, gc, master_transform, paths, all_transforms,
linewidths, linestyles, antialiaseds, urls,
offset_position):
"""
Draw a collection of paths selecting drawing properties from
the lists *facecolors*, *edgecolors*, *linewidths*,
*linestyles* and *antialiaseds*. *offsets* is a list of
offsets to apply to each of the paths. The offsets in
*offsets* are first transformed by *offsetTrans* before being
applied.
Draw a collection of *paths*.

Each path is first transformed by the corresponding entry
in *all_transforms* (a list of (3, 3) matrices) and then by
*master_transform*. They are then translated by the corresponding
entry in *offsets*, which has been first transformed by *offsetTrans*.

*facecolors*, *edgecolors*, *linewidths*, *linestyles*, and
*antialiased* are lists that set the corresponding properties.

*offset_position* is unused now, but the argument is kept for
backwards compatibility.
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