From f219e0fae3dfb577c318b3580e6ee4e0886eb6e3 Mon Sep 17 00:00:00 2001
From: rim <11380091+rozhuk-im@users.noreply.github.com>
Date: Dec 17 2021 02:54:21 +0000
Subject: Fix build with clang 13: no member named 'copy' in namespace 'std' (#4187)



---

diff --git a/toonz/sources/include/tcg/poly_ops.h b/toonz/sources/include/tcg/poly_ops.h
index 1825837..741b91a 100644
--- a/toonz/sources/include/tcg/poly_ops.h
+++ b/toonz/sources/include/tcg/poly_ops.h
@@ -5,6 +5,7 @@
 
 // tcg includes
 #include "macros.h"
+#include <algorithm>
 
 /*!
   \file     tcg_poly_ops.h