Description
Describe the bug
This example from the documentation used to act as expected in v1.0.3 but in v1.1.0 and v1.1.1 the internal polygons (islands) are not rendered as cutouts when using ezdxf.addons.drawing.matplotlib.qsave. For clarity: it appears as if the modelspace can be exported as a DXF with the hatch correctly depicting the cutout islands in a shape - the maybe has only comes from the image export. I haven't been able to isolate what changes might be causing the issue.
To Reproduce
A small snippet that can display the issue (taken from the example linked above):
import ezdxf
from ezdxf.addons.drawing import matplotlib
# hatch requires the DXF R2000 or later
doc = ezdxf.new("R2000")
msp = doc.modelspace()
hatch = msp.add_hatch(
color=1,
dxfattribs={
"hatch_style": ezdxf.const.HATCH_STYLE_NESTED,
# 0 = nested: ezdxf.const.HATCH_STYLE_NESTED
# 1 = outer: ezdxf.const.HATCH_STYLE_OUTERMOST
# 2 = ignore: ezdxf.const.HATCH_STYLE_IGNORE
},
)
# The first path has to set flag: 1 = external
# flag const.BOUNDARY_PATH_POLYLINE is added (OR) automatically
hatch.paths.add_polyline_path(
[(0, 0), (10, 0), (10, 10), (0, 10)],
is_closed=True,
flags=ezdxf.const.BOUNDARY_PATH_EXTERNAL,
)
# The second path has to set flag: 16 = outermost
hatch.paths.add_polyline_path(
[(1, 1), (9, 1), (9, 9), (1, 9)],
is_closed=True,
flags=ezdxf.const.BOUNDARY_PATH_OUTERMOST,
)
matplotlib.qsave(msp, "nested_polylines.png")
Expected behavior
Expected behavior is to have the inner polyline removed from the outer polyline as shown:
Actual behavior is to only display the outer polyline (or perhaps to also render the inner polyline but also filled).
