From 957615c6e224efe9fb1dec315de94474e374a3bf Mon Sep 17 00:00:00 2001
From: Gordon Chapman <gchapman@fb.com>
Date: Wed, 15 Apr 2020 16:19:33 -0700
Subject: [PATCH] Fixed duplicate entries in mesh.extras.targetnames

---
 src/gltf/properties/MeshData.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gltf/properties/MeshData.cpp b/src/gltf/properties/MeshData.cpp
index 36c06dc..bf17abf 100644
--- a/src/gltf/properties/MeshData.cpp
+++ b/src/gltf/properties/MeshData.cpp
@@ -17,7 +17,7 @@ json MeshData::serialize() const {
   json jsonTargetNamesArray = json::array();
   for (const auto& primitive : primitives) {
     jsonPrimitivesArray.push_back(*primitive);
-    if (!primitive->targetNames.empty()) {
+    if (!primitive->targetNames.empty() && jsonTargetNamesArray.empty()) {
       for (auto targetName : primitive->targetNames) {
         jsonTargetNamesArray.push_back(targetName);
       }