From 2488b9e866fb1ecb842a27dd9f4956ec167e3dee Mon Sep 17 00:00:00 2001
From: Grant Sanderson <grant@3blue1brown.com>
Date: Tue, 18 Jan 2022 10:03:45 -0800
Subject: [PATCH] Make sure null parametric curve has at least one point

---
 manimlib/mobject/functions.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/manimlib/mobject/functions.py b/manimlib/mobject/functions.py
index d0d64cee..5e54497e 100644
--- a/manimlib/mobject/functions.py
+++ b/manimlib/mobject/functions.py
@@ -42,6 +42,8 @@ class ParametricCurve(VMobject):
             self.add_points_as_corners(points[1:])
         if self.use_smoothing:
             self.make_approximately_smooth()
+        if not self.has_points():
+            self.set_points([self.t_func(t_min)])
         return self