From 2d82607db9e206617dc924bda62752cd2fb0b537 Mon Sep 17 00:00:00 2001
From: c0rp3n's Den <ojhitchcock@gmail.com>
Date: Mon, 29 Apr 2019 23:23:21 +0100
Subject: [PATCH] Add support for smoothing groups

These are auto generated by blender.
Control should be through sharp edges and edge splits.
---
 io_scene_blam/export_model.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/io_scene_blam/export_model.py b/io_scene_blam/export_model.py
index 9b7d82c..2f89ab4 100644
--- a/io_scene_blam/export_model.py
+++ b/io_scene_blam/export_model.py
@@ -127,6 +127,8 @@ def write_jms_model(context, filepath,
             # _must_ do this first since it re-allocs arrays
             mesh_triangulate(mesh)
 
+        smoothing_groups, group_count = mesh.calc_smooth_groups()
+
         # Loop triangles
         for poly in mesh.polygons:
             # Vertices
@@ -144,7 +146,7 @@ def write_jms_model(context, filepath,
                     '{0[0]:0.6f}\t{0[1]:0.6f}\n'.format( # uv coordinates
                         mesh.uv_layers.active.data[i].uv
                         ) +
-                    '0\n' # smoothing group
+                    str(smoothing_groups[poly.index]) + '\n' # smoothing group
                     )
 
             # Triangles