From feb55e80dae71afabb0043b218894c76c7a840ec Mon Sep 17 00:00:00 2001
From: Bigfoot71 <victor.lejuez@protonmail.ch>
Date: Mon, 23 Dec 2024 22:10:31 +0100
Subject: [PATCH] fix normal transform in `UpdateModelAnimation`

---
 src/rmodels.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/rmodels.c b/src/rmodels.c
index 0a8e38ddb..14d4f22e7 100644
--- a/src/rmodels.c
+++ b/src/rmodels.c
@@ -2380,7 +2380,7 @@ void UpdateModelAnimation(Model model, ModelAnimation anim, int frame)
                 if (mesh.normals != NULL)
                 {
                     animNormal = (Vector3){ mesh.normals[vCounter], mesh.normals[vCounter + 1], mesh.normals[vCounter + 2] };
-                    animNormal = Vector3Transform(animNormal,model.meshes[m].boneMatrices[boneId]);
+                    animNormal = Vector3Transform(animNormal, MatrixTranspose(MatrixInvert(model.meshes[m].boneMatrices[boneId])));
                     mesh.animNormals[vCounter] += animNormal.x*boneWeight;
                     mesh.animNormals[vCounter + 1] += animNormal.y*boneWeight;
                     mesh.animNormals[vCounter + 2] += animNormal.z*boneWeight;