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Retarget PR#29175 to main#29285

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Merged
scottshambaugh merged 5 commits intomatplotlib:mainfromscottshambaugh:gh_29156
Dec 12, 2024
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1 change: 1 addition & 0 deletionslib/mpl_toolkits/mplot3d/art3d.py
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Original file line numberDiff line numberDiff line change
Expand Up@@ -1382,6 +1382,7 @@ def _generate_normals(polygons):
v2 = np.empty((len(polygons), 3))
for poly_i, ps in enumerate(polygons):
n = len(ps)
ps = np.asarray(ps)
i1, i2, i3 = 0, n//3, 2*n//3
v1[poly_i, :] = ps[i1, :] - ps[i2, :]
v2[poly_i, :] = ps[i2, :] - ps[i3, :]
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17 changes: 16 additions & 1 deletionlib/mpl_toolkits/mplot3d/tests/test_art3d.py
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Expand Up@@ -3,7 +3,11 @@
import matplotlib.pyplot as plt

from matplotlib.backend_bases import MouseEvent
from mpl_toolkits.mplot3d.art3d import Line3DCollection, _all_points_on_plane
from mpl_toolkits.mplot3d.art3d import (
Line3DCollection,
Poly3DCollection,
_all_points_on_plane,
)


def test_scatter_3d_projection_conservation():
Expand DownExpand Up@@ -85,3 +89,14 @@ def test_all_points_on_plane():
# All points lie on a plane
points = np.array([[0, 0, 0], [0, 1, 0], [1, 0, 0], [1, 1, 0], [1, 2, 0]])
assert _all_points_on_plane(*points.T)


def test_generate_normals():
# Smoke test for https://github.com/matplotlib/matplotlib/issues/29156
vertices = ((0, 0, 0), (0, 5, 0), (5, 5, 0), (5, 0, 0))
shape = Poly3DCollection([vertices], edgecolors='r', shade=True)

fig = plt.figure()
ax = fig.add_subplot(projection='3d')
ax.add_collection3d(shape)
plt.draw()
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