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create set_offsets3d for PathCollection3d #19573

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create set_offsets3d for PathCollection3d #19573

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15 changes: 15 additions & 0 deletions lib/mpl_toolkits/mplot3d/art3d.py
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Original file line number Diff line number Diff line change
Expand Up @@ -533,6 +533,21 @@ def set_sort_zpos(self, val):
self._sort_zpos = val
self.stale = True

def get_offsets3d(self):
"""Return the 3d offsets for the collection as numpy array."""
return np.array(self._offsets3d).T

def set_offsets3d(self, offsets):
"""
Set the offsets for the collection.

Parameters
----------
offsets : (N, 3) array-like
"""
self._offsets3d = np.asanyarray(offsets).T
self.stale = True

def set_3d_properties(self, zs, zdir):
# Force the collection to initialize the face and edgecolors
# just in case it is a scalarmappable with a colormap.
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20 changes: 20 additions & 0 deletions lib/mpl_toolkits/tests/test_mplot3d.py
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Expand Up @@ -1116,6 +1116,26 @@ def test_line3d_set_get_data_3d():
np.testing.assert_array_equal((x2, y2, z2), line.get_data_3d())


def test_PathCollection3d_set_get_offsets_3d():
orig = np.array([
[0, 1, 1],
[2, 3, 2]
])

new = np.array([
[6, 7, 4],
[8, 9, 5],
[10, 11, 6]
])

fig = plt.figure()
ax = fig.add_subplot(projection='3d')
scat = ax.scatter(*orig.T)
np.testing.assert_array_equal(orig, scat.get_offsets3d())
scat.set_offsets3d(new)
np.testing.assert_array_equal(new, scat.get_offsets3d())


@check_figures_equal(extensions=["png"])
def test_inverted(fig_test, fig_ref):
# Plot then invert.
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