Fix plot flipping at elev>270

scottshambaugh · scottshambaugh · commit 425eade7fd4b · 2021-10-24T22:44:55.000-06:00
diff --git a/lib/mpl_toolkits/mplot3d/axes3d.py b/lib/mpl_toolkits/mplot3d/axes3d.py
@@ -1059,9 +1059,9 @@ def get_proj(self):
         # elev stores the elevation angle in the z plane
         # azim stores the azimuth angle in the x,y plane
         # roll stores the roll angle about the view axis
-        elev_rad = np.deg2rad(self.elev)
-        azim_rad = np.deg2rad(self.azim)
-        roll_rad = np.deg2rad(self.roll)
+        elev_rad = np.deg2rad(art3d._norm_angle(self.elev))
+        azim_rad = np.deg2rad(art3d._norm_angle(self.azim))
+        roll_rad = np.deg2rad(art3d._norm_angle(self.roll))
 
         # Coordinates for a point that rotates around the box of data.
         # p0, p1 corresponds to rotating the box only around the
@@ -1272,8 +1272,8 @@ def _on_move(self, event):
                 return
             delev = +(dy/h)*180*np.cos(roll) + (dx/w)*180*np.sin(roll)
             dazim = -(dy/h)*180*np.sin(roll) + (dx/w)*180*np.cos(roll)
-            self.elev = art3d._norm_angle(self.elev - delev)
-            self.azim = art3d._norm_angle(self.azim - dazim)
+            self.elev = self.elev - delev
+            self.azim = self.azim - dazim
             self.get_proj()
             self.stale = True
             self.figure.canvas.draw_idle()
