From 25794f0a5849dcfd06ac3ce55d5b10d4845989e9 Mon Sep 17 00:00:00 2001
From: Fothsid <18036123+Fothsid@users.noreply.github.com>
Date: Sun, 15 Aug 2021 21:24:44 +0500
Subject: [PATCH] whoops forgot that normals need transformations as well

---
 src/convert_to_nbd.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/convert_to_nbd.cpp b/src/convert_to_nbd.cpp
index fa9b711..d517d15 100644
--- a/src/convert_to_nbd.cpp
+++ b/src/convert_to_nbd.cpp
@@ -410,9 +410,11 @@ static void FillMesh(FbxManager* sdkManager, OBMesh& mesh, FbxNode* node)
 		mesh.normalList->list.resize(vertices.size());
 		for (int i = 0; i < vertices.size(); i++)
 		{
-			mesh.normalList->list[i].x = vertices[i].nx;
-			mesh.normalList->list[i].y = vertices[i].ny;
-			mesh.normalList->list[i].z = vertices[i].nz;
+			FbxVector4 normal(vertices[i].nx, vertices[i].ny, vertices[i].nz);
+			normal = matrix.Inverse() * normal;
+			mesh.normalList->list[i].x = normal[0];
+			mesh.normalList->list[i].y = normal[1];
+			mesh.normalList->list[i].z = normal[2];
 		}
 	}