FIX: Axis offset mispositioning in plot_surface

Author: Yi Wei

lib/mpl_toolkits/mplot3d/axis3d.py

@@ -323,6 +323,7 @@ def draw_pane(self, renderer):
     @artist.allow_rasterization
     def draw(self, renderer):
         self.label._transform = self.axes.transData
+        self.offsetText._transform = self.axes.transData
         renderer.open_group("axis3d", gid=self.get_gid())
 
         ticks = self._update_ticks()

lib/mpl_toolkits/mplot3d/tests/baseline_images/test_axes3d/surface3d_label_offset_tick_position.png

@@ -588,6 +588,21 @@ def test_surface3d():
     fig.colorbar(surf, shrink=0.5, aspect=5)
 
 
+@image_comparison(['surface3d_label_offset_tick_position.png'], style='mpl20')
+def test_surface3d_label_offset_tick_position():
+    ax = plt.figure().add_subplot(projection="3d")
+
+    x, y = np.mgrid[0:6 * np.pi:0.25, 0:4 * np.pi:0.25]
+    z = np.sqrt(np.abs(np.cos(x) + np.cos(y)))
+
+    ax.plot_surface(x * 1e5, y * 1e6, z * 1e8, cmap='autumn', cstride=2, rstride=2)
+    ax.set_xlabel("X label")
+    ax.set_ylabel("Y label")
+    ax.set_zlabel("Z label")
+
+    ax.figure.canvas.draw()
+
+
 @mpl3d_image_comparison(['surface3d_shaded.png'], style='mpl20')
 def test_surface3d_shaded():
     fig = plt.figure()