From 0a3d9e6a2882ff36b86b31b1183d3b41cc34c467 Mon Sep 17 00:00:00 2001
From: Qingyou Zhao <qingyou@intrinsic.ai>
Date: Tue, 10 Dec 2024 10:50:34 -0800
Subject: [PATCH] RecalculateNormals if submesh has no normals

Signed-off-by: Qingyou Zhao <qingyou@intrinsic.ai>
---
 graphics/src/AssimpLoader.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/graphics/src/AssimpLoader.cc b/graphics/src/AssimpLoader.cc
index d2e3b754..b20bb837 100644
--- a/graphics/src/AssimpLoader.cc
+++ b/graphics/src/AssimpLoader.cc
@@ -700,6 +700,9 @@ SubMesh AssimpLoader::Implementation::CreateSubMesh(
     subMesh.AddIndex(face.mIndices[2]);
   }
   subMesh.SetMaterialIndex(_assimpMesh->mMaterialIndex);
+  if (subMesh.NormalCount() == 0u){
+    subMesh.RecalculateNormals();
+  }
   return subMesh;
 }