We have not been able to reproduce this issue locally on MacOS.

To reproduce this issue in CI:

• Checkout Pin numpy < 1.19.0 to get tests passing again (#197)
• Update CI Docker image to cimg/python:3.7.12
• ssh into CI
• pip install numpy==1.19.0
• in python run:

import numpy as np
import vg
from polliwog import Plane

point_on_plane = np.array([1.0, 2.0, 3.0])
plane_normal = vg.normalize(np.array([3.0, 4.0, 5.0]))
plane = Plane(point_on_plane=point_on_plane, unit_normal=plane_normal)

print(plane.sign(point_on_plane))
print(plane.sign(np.array([point_on_plane])))

Both values are expected to be zero, but the last value is returned as 1. This bug is causing the test to fail

This was fixed in BREAKING CHANGE: Change Plane constructor (#303)