Merge pull request matplotlib#26433 from scottshambaugh/3d_coords_pane

Call out which pane is hovered over for 3d hover coordinates

Author: QuLogic

lib/mpl_toolkits/mplot3d/axes3d.py

@@ -1096,11 +1096,16 @@ def _location_coords(self, xv, yv, renderer):
         """
         Return the location on the axis pane underneath the cursor as a string.
         """
-        p1 = self._calc_coord(xv, yv, renderer)
+        p1, pane_idx = self._calc_coord(xv, yv, renderer)
         xs = self.format_xdata(p1[0])
         ys = self.format_ydata(p1[1])
         zs = self.format_zdata(p1[2])
-        coords = f'x={xs}, y={ys}, z={zs}'
+        if pane_idx == 0:
+            coords = f'x pane={xs}, y={ys}, z={zs}'
+        elif pane_idx == 1:
+            coords = f'x={xs}, y pane={ys}, z={zs}'
+        elif pane_idx == 2:
+            coords = f'x={xs}, y={ys}, z pane={zs}'
         return coords
 
     def _get_camera_loc(self):
@@ -1148,11 +1153,12 @@ def _calc_coord(self, xv, yv, renderer=None):
                 scales[i] = np.inf
             else:
                 scales[i] = (p1[i] - pane_locs[i]) / vec[i]
-        scale = scales[np.argmin(abs(scales))]
+        pane_idx = np.argmin(abs(scales))
+        scale = scales[pane_idx]
 
         # Calculate the point on the closest pane
         p2 = p1 - scale*vec
-        return p2
+        return p2, pane_idx
 
     def _on_move(self, event):
         """

lib/mpl_toolkits/mplot3d/tests/test_axes3d.py

@@ -1932,27 +1932,27 @@ def test_format_coord():
     xv = 0.1
     yv = 0.1
     fig.canvas.draw()
-    assert ax.format_coord(xv, yv) == 'x=10.5227, y=1.0417, z=0.1444'
+    assert ax.format_coord(xv, yv) == 'x=10.5227, y pane=1.0417, z=0.1444'
 
     # Modify parameters
     ax.view_init(roll=30, vertical_axis="y")
     fig.canvas.draw()
-    assert ax.format_coord(xv, yv) == 'x=9.1875, y=0.9761, z=0.1291'
+    assert ax.format_coord(xv, yv) == 'x pane=9.1875, y=0.9761, z=0.1291'
 
     # Reset parameters
     ax.view_init()
     fig.canvas.draw()
-    assert ax.format_coord(xv, yv) == 'x=10.5227, y=1.0417, z=0.1444'
+    assert ax.format_coord(xv, yv) == 'x=10.5227, y pane=1.0417, z=0.1444'
 
     # Check orthographic projection
     ax.set_proj_type('ortho')
     fig.canvas.draw()
-    assert ax.format_coord(xv, yv) == 'x=10.8869, y=1.0417, z=0.1528'
+    assert ax.format_coord(xv, yv) == 'x=10.8869, y pane=1.0417, z=0.1528'
 
     # Check non-default perspective projection
     ax.set_proj_type('persp', focal_length=0.1)
     fig.canvas.draw()
-    assert ax.format_coord(xv, yv) == 'x=9.0620, y=1.0417, z=0.1110'
+    assert ax.format_coord(xv, yv) == 'x=9.0620, y pane=1.0417, z=0.1110'
 
 
 def test_get_axis_position():