Add RuntimeWarning guard.

oscargus · oscargus · commit 59b520de14a0 · 2022-03-09T08:21:05.000+01:00
diff --git a/lib/mpl_toolkits/mplot3d/proj3d.py b/lib/mpl_toolkits/mplot3d/proj3d.py
@@ -22,8 +22,11 @@ def _line2d_seg_dist(p1, p2, p0):
     x01 = np.asarray(p0[0]) - p1[0]
     y01 = np.asarray(p0[1]) - p1[1]
 
-    u = (x01*x21 + y01*y21) / (x21**2 + y21**2)
-    u = np.clip(u, 0, 1)
+    if x21 != 0.0 or y21 != 0.0:
+        u = (x01*x21 + y01*y21) / (x21**2 + y21**2)
+        u = np.clip(u, 0, 1)
+    else:
+        u = 0.0
     d = np.hypot(x01 - u*x21, y01 - u*y21)
 
     return d
