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Add 3D scatter test for cmap update #30062

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Merged
oscargus merged 1 commit into from
May 18, 2025
Merged

Add 3D scatter test for cmap update #30062

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22 changes: 22 additions & 0 deletions lib/matplotlib/tests/test_collections.py
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Original file line number Diff line number Diff line change
Expand Up @@ -492,6 +492,28 @@ def test_polycollection_close():
ax.set_ylim3d(0, 4)


@check_figures_equal(extensions=["png"])
def test_scalarmap_change_cmap(fig_test, fig_ref):
# Ensure that changing the colormap of a 3D scatter after draw updates the colors.

x, y, z = np.array(list(itertools.product(
np.arange(0, 5, 1),
np.arange(0, 5, 1),
np.arange(0, 5, 1)
))).T
c = x + y

# test
ax_test = fig_test.add_subplot(111, projection='3d')
sc_test = ax_test.scatter(x, y, z, c=c, s=40, cmap='jet')
fig_test.canvas.draw()
sc_test.set_cmap('viridis')

# ref
ax_ref = fig_ref.add_subplot(111, projection='3d')
ax_ref.scatter(x, y, z, c=c, s=40, cmap='viridis')


@image_comparison(['regularpolycollection_rotate.png'], remove_text=True)
def test_regularpolycollection_rotate():
xx, yy = np.mgrid[:10, :10]
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