Parameter resolution in buffer method doesn't work properly

[SergeyMalashenko]

Steps to reproduce the problem.

[jorisvandenbossche]

@SergeyMalashenko very late reply, but this seems to work correctly now with the latest GEOS (I am using shapely 2.0 with GEOS 3.11).

With join_style=2:

from shapely.geometry import LineString
from shapely.plotting import plot_line, plot_polygon

line = LineString([(0, 0), (0, 1), (1, 1), (1, 0)])
buffer = line.buffer(0.1, cap_style=1, join_style=2, mitre_limit=2.0, quad_segs=3)

plot_line(line, color="green")
plot_polygon(buffer, color="C0")

and with join_style=1

buffer = line.buffer(0.1, cap_style=1, join_style=1, mitre_limit=2.0, quad_segs=3)

plot_line(line, color="green")
plot_polygon(buffer, color="C0")

In both cases the caps have a limited number of segments.

[SergeyMalashenko]

thank you! :)