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Avoid using Bbox machinery in Path.get_extents; special case polylines. by anntzer · Pull Request #17995 · matplotlib/matplotlib · GitHub

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Avoid using Bbox machinery in Path.get_extents; special case polylines. #17995

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Merged
jklymak merged 1 commit into from
Jul 21, 2020
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Avoid using Bbox machinery in Path.get_extents; special case polylines. #17995

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20 changes: 13 additions & 7 deletions lib/matplotlib/path.py
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Original file line number Diff line number Diff line change
Expand Up @@ -588,13 +588,19 @@ def get_extents(self, transform=None, **kwargs):
from .transforms import Bbox
if transform is not None:
self = transform.transform_path(self)
bbox = Bbox.null()
for curve, code in self.iter_bezier(**kwargs):
# places where the derivative is zero can be extrema
_, dzeros = curve.axis_aligned_extrema()
# as can the ends of the curve
bbox.update_from_data_xy(curve([0, *dzeros, 1]), ignore=False)
return bbox
if self.codes is None:
xys = self.vertices
elif len(np.intersect1d(self.codes, [Path.CURVE3, Path.CURVE4])) == 0:
xys = self.vertices[self.codes != Path.CLOSEPOLY]
else:
xys = []
for curve, code in self.iter_bezier(**kwargs):
# places where the derivative is zero can be extrema
_, dzeros = curve.axis_aligned_extrema()
# as can the ends of the curve
xys.append(curve([0, *dzeros, 1]))
xys = np.concatenate(xys)
return Bbox([xys.min(axis=0), xys.max(axis=0)])

def intersects_path(self, other, filled=True):
"""
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