From 15f9970044711a3a1d511bfe3f1ebdae5ca437db Mon Sep 17 00:00:00 2001
From: HenryOfCarim <imhenryviii@gmail.com>
Date: Sun, 24 Nov 2024 15:52:22 +0200
Subject: [PATCH] Fix for export

- ignore meshes with broken UV during tangents calculation
- add null material hash for mrl features
---
 albam/engines/mtfw/material.py | 1 +
 albam/lib/blender.py           | 6 +++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/albam/engines/mtfw/material.py b/albam/engines/mtfw/material.py
index 1b038de..5edafbe 100644
--- a/albam/engines/mtfw/material.py
+++ b/albam/engines/mtfw/material.py
@@ -74,6 +74,7 @@
 MRL_MATERIAL_TYPE_STR_TO_ID = {ext_desc: h for h, ext_desc in MRL_MATERIAL_TYPE_STR.items()}
 
 MRL_PER_MATERIAL_FEATURES = {
+    0x854D484: [],
     0x5FB0EBE4: ["FVertexDisplacement"],
     0x7D2B31B3: ["FVertexDisplacement"],
     0x1CAB245E: ["CBDDMaterialParam",
diff --git a/albam/lib/blender.py b/albam/lib/blender.py
index 8eacead..f955f1a 100644
--- a/albam/lib/blender.py
+++ b/albam/lib/blender.py
@@ -246,7 +246,11 @@ def get_tangents_per_vertex(blender_mesh):
         uv_name = blender_mesh.uv_layers[0].name
     except IndexError:
         return tangents
-    blender_mesh.calc_tangents(uvmap=uv_name)
+    try:
+        blender_mesh.calc_tangents(uvmap=uv_name)
+    except RuntimeError:
+        print("Mesh {} has no UV".format(blender_mesh.name))
+        return tangents
     for loop in blender_mesh.loops:
         tangents.setdefault(loop.vertex_index, loop.tangent)
     return tangents