From 0d433b075edd4e4d926b16c184eb0ce06abfa76e Mon Sep 17 00:00:00 2001
From: Grant Sanderson <grant@3blue1brown.com>
Date: Wed, 4 Jan 2023 17:18:10 -0800
Subject: [PATCH] Fix bug associated with orientation data not always getting
 written

This might reflect a deeper issue with the locked_data sometimes being _too_ locked.
---
 manimlib/mobject/types/vectorized_mobject.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/manimlib/mobject/types/vectorized_mobject.py b/manimlib/mobject/types/vectorized_mobject.py
index 759e7d0d..fcab57c9 100644
--- a/manimlib/mobject/types/vectorized_mobject.py
+++ b/manimlib/mobject/types/vectorized_mobject.py
@@ -995,6 +995,9 @@ class VMobject(Mobject):
         v12s = points[2::3] - points[1::3]
         curve_orientations = np.sign(cross2d(v01s, v12s))
         self.data["orientation"] = np.transpose([curve_orientations.repeat(3)])
+        # Read into fill_data so there are no locked data issues later
+        self.fill_data = resize_array(self.fill_data, len(points))
+        self.fill_data["orientation"][:] = self.data["orientation"]
 
         concave_parts = curve_orientations < 0