[F3D] Material Ordered By Slot (#285)

* sorted materials for a static mesh by material slot

* black format

* black format on debian, thank you based windows for not working even when changing git config

* Update fast64_internal/f3d/f3d_writer.py

dragon suggestion

Co-authored-by: Dragorn421 <Dragorn421@users.noreply.github.com>

* black

---------

Co-authored-by: scut <scut>
Co-authored-by: Dragorn421 <Dragorn421@users.noreply.github.com>

fast64_internal/f3d/f3d_writer.py

@@ -334,14 +334,21 @@ def saveStaticModel(
 
     # checkForF3DMaterial(obj)
 
-    facesByMat = {}
+    faces_by_mat = {}
     for face in obj.data.loop_triangles:
-        if face.material_index not in facesByMat:
-            facesByMat[face.material_index] = []
-        facesByMat[face.material_index].append(face)
+        if face.material_index not in faces_by_mat:
+            faces_by_mat[face.material_index] = []
+        faces_by_mat[face.material_index].append(face)
+
+    # sort by material slot
+    faces_by_mat = {
+        mat_index: faces_by_mat[mat_index]
+        for mat_index, _ in enumerate(obj.material_slots)
+        if mat_index in faces_by_mat
+    }
 
     fMeshes = {}
-    for material_index, faces in facesByMat.items():
+    for material_index, faces in faces_by_mat.items():
         material = obj.material_slots[material_index].material
 
         if drawLayerField is not None and material.mat_ver > 3: