lwpolyline is_simple

[toporivskiy]

Good day!
How do you like the idea of ​​adding a property to a polyline if it doesn't have its own intersection or self-touch?
Analogue: https://shapely.readthedocs.io/en/stable/reference/shapely.is_simple.html

[mozman]

shapely seems to work well with ezdxf:

import shapely
import ezdxf.path

doc = ezdxf.new()
msp = doc.modelspace()
polyline = msp.add_lwpolyline([(0, 0), (10, 0), (10, 5), (5, 5), (5, -5)])

path = ezdxf.path.make_path(polyline)  # convert to a Path
vertices = path.flattening(0.01)   # because a polyline could contain bulges (cirular arcs)
is_simple = shapely.is_simple(shapely.LineString(vertices))
print(f"Is this polyline simple: {is_simple}")  # answer: no, it's not