From b29c649a478d638af9778d0cff45a8f457db923b Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Fri, 3 Mar 2023 20:20:06 +0100
Subject: serialize: make anim_group::offset field optional

---
 serialize/anim.cpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/serialize/anim.cpp b/serialize/anim.cpp
index 01414f52..42f39328 100644
--- a/serialize/anim.cpp
+++ b/serialize/anim.cpp
@@ -148,9 +148,12 @@ void adl_serializer<anim_group>::to_json(json& j, const anim_group& val)
     using nlohmann::to_json;
     if (!val.mirror_from.isEmpty())
     {
+        const anim_group def{};
+
         j["name"] = val.name;
         j["mirror-from"] = val.mirror_from;
-        j["offset"] = val.offset;
+        if (val.offset != def.offset)
+            j["offset"] = val.offset;
     }
     else
         to_json(j, val);
@@ -161,9 +164,12 @@ void adl_serializer<anim_group>::from_json(const json& j, anim_group& val)
     using nlohmann::from_json;
     if (j.contains("mirror-from"))
     {
+        const anim_group def{};
+
         val.name = j["name"];
         val.mirror_from = j["mirror-from"];
-        val.offset = j["offset"];
+        if (val.offset != def.offset)
+            val.offset = j["offset"];
     }
     else
         from_json(j, val);
-- 
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