Force normalized normals

code/glTF2Exporter.cpp

@@ -708,8 +708,13 @@ void glTF2Exporter::ExportMeshes()
 		if (v) p.attributes.position.push_back(v);
 
 		/******************** Normals ********************/
+        // Normalize all normals as the validator can emit a warning otherwise
+        for (auto i = 0u; i < aim->mNumVertices; ++i) {
+            aim->mNormals[i].Normalize();
+        }
+
 		Ref<Accessor> n = ExportData(*mAsset, meshId, b, aim->mNumVertices, aim->mNormals, AttribType::VEC3, AttribType::VEC3, ComponentType_FLOAT);
-		if (n) p.attributes.normal.push_back(n);
+        if (n) p.attributes.normal.push_back(n);
 
 		/************** Texture coordinates **************/
         for (int i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++i) {