From a54a81744d8c3abecfb65b693d969c65883b8bf8 Mon Sep 17 00:00:00 2001
From: Grant Sanderson <grant@3blue1brown.com>
Date: Thu, 29 Dec 2022 12:04:35 -0800
Subject: [PATCH] Have ShaderWrapper.combine_with do nothing for empty arg list

---
 manimlib/shader_wrapper.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/manimlib/shader_wrapper.py b/manimlib/shader_wrapper.py
index a053d9ca..13fb3a28 100644
--- a/manimlib/shader_wrapper.py
+++ b/manimlib/shader_wrapper.py
@@ -131,7 +131,8 @@ class ShaderWrapper(object):
         self.refresh_id()
 
     def combine_with(self, *shader_wrappers: ShaderWrapper) -> ShaderWrapper:
-        self.read_in(self.copy(), *shader_wrappers)
+        if len(shader_wrappers) > 0:
+            self.read_in(self.copy(), *shader_wrappers)
         return self
 
     def read_in(self, *shader_wrappers: ShaderWrapper) -> ShaderWrapper: