From 0ac9ee1fbf5127d88154b35f5d7054bc39438243 Mon Sep 17 00:00:00 2001
From: Grant Sanderson <grant@3blue1brown.com>
Date: Tue, 20 Aug 2024 10:15:53 -0500
Subject: [PATCH] Don't deepcopy ShaderWrapper

---
 manimlib/mobject/mobject.py | 8 ++++++--
 manimlib/shader_wrapper.py  | 6 ++++++
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/manimlib/mobject/mobject.py b/manimlib/mobject/mobject.py
index 16364eb5..8e555c40 100644
--- a/manimlib/mobject/mobject.py
+++ b/manimlib/mobject/mobject.py
@@ -652,9 +652,13 @@ class Mobject(object):
         return self
 
     def deepcopy(self) -> Self:
+        self.parents = []
+        result.target = None
+        result.saved_state = None
+        for submob in self.get_family():
+            submob._shaders_initialized = False
+            submob._data_has_changed = True
         result = copy.deepcopy(self)
-        result._shaders_initialized = False
-        result._data_has_changed = True
         return result
 
     def copy(self, deep: bool = False) -> Self:
diff --git a/manimlib/shader_wrapper.py b/manimlib/shader_wrapper.py
index 9251a497..860057d8 100644
--- a/manimlib/shader_wrapper.py
+++ b/manimlib/shader_wrapper.py
@@ -63,6 +63,12 @@ class ShaderWrapper(object):
         self.init_vertex_objects()
         self.refresh_id()
 
+    def __deepcopy__(self, memo):
+        # Don't allow deepcopies, e.g. if the mobject with this ShaderWrapper as an
+        # attribute gets copies. Returning None means the parent object with this ShaderWrapper
+        # as an attribute should smoothly handle this case.
+        return None
+
     def init_program_code(self) -> None:
         def get_code(name: str) -> str | None:
             return get_shader_code_from_file(