From e8a2f2a42b371a049303ee2b9f62499fe1a5184d Mon Sep 17 00:00:00 2001
From: Nobody Really <notactualowl@fakepmail.ie>
Date: Thu, 18 Aug 2016 09:31:17 +0200
Subject: [PATCH] Remove temporary mesh data created on every export

---
 io_scene_dae/export_dae.py | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/io_scene_dae/export_dae.py b/io_scene_dae/export_dae.py
index d201639..e3dc7b3 100644
--- a/io_scene_dae/export_dae.py
+++ b/io_scene_dae/export_dae.py
@@ -428,6 +428,7 @@ class DaeExporter:
                 """
                 p = node.data
                 v = node.to_mesh(bpy.context.scene, True, "RENDER")
+                self.temp_meshes.add(v)
                 node.data = v
 #                self.export_node(node, il, shape.name)
                 node.data.update()
@@ -539,6 +540,7 @@ class DaeExporter:
 
         mesh = node.to_mesh(self.scene, apply_modifiers,
                             "RENDER")  # is this allright?
+        self.temp_meshes.add(mesh)
 
         triangulate = self.config["use_triangles"]
         if (triangulate):
@@ -1706,7 +1708,7 @@ class DaeExporter:
                     for bone in node.data.bones:
                         if((bone.name.startswith("ctrl") and self.config["use_exclude_ctrl_bones"])):
                             continue
-                            
+
                         bone_name = self.skeleton_info[node]["bone_ids"][bone]
 
                         if (not (bone_name in xform_cache)):
@@ -1907,7 +1909,8 @@ class DaeExporter:
     __slots__ = ("operator", "scene", "last_id", "scene_name", "sections",
                  "path", "mesh_cache", "curve_cache", "material_cache",
                  "image_cache", "skeleton_info", "config", "valid_nodes",
-                 "armature_for_morph", "used_bones", "wrongvtx_report")
+                 "armature_for_morph", "used_bones", "wrongvtx_report",
+                 "temp_meshes")
 
     def __init__(self, path, kwargs, operator):
         self.operator = operator
@@ -1917,6 +1920,7 @@ class DaeExporter:
         self.sections = {}
         self.path = path
         self.mesh_cache = {}
+        self.temp_meshes = set()
         self.curve_cache = {}
         self.material_cache = {}
         self.image_cache = {}
@@ -1927,9 +1931,16 @@ class DaeExporter:
         self.used_bones = []
         self.wrongvtx_report = False
 
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *exc):
+        for mesh in self.temp_meshes:
+            bpy.data.meshes.remove(mesh)
+
 
 def save(operator, context, filepath="", use_selection=False, **kwargs):
-    exp = DaeExporter(filepath, kwargs, operator)
-    exp.export()
+    with DaeExporter(filepath, kwargs, operator) as exp:
+        exp.export()
 
     return {"FINISHED"}  # so the script wont run after we have batch exported.