Merge pull request #22 from paper-pauper/empty-fix

Fixed empty nodes validation issue

io_scene_dae/export_dae.py

@@ -159,6 +159,13 @@ class DaeExporter:
         line = "{}{}".format(indent * "\t", text)
         self.sections[section].append(line)
 
+    def purge_empty_nodes(self):
+        sections = {}
+        for k, v in self.sections.items():
+            if not (len(v) == 2 and v[0][1:] == v[1][2:]):
+                sections[k] = v
+        self.sections = sections
+
     def export_image(self, image):
         img_id = self.image_cache.get(image)
         if img_id:
@@ -1961,6 +1968,8 @@ class DaeExporter:
         self.writel(S_MATS, 0, "</library_materials>")
         self.writel(S_FX, 0, "</library_effects>")
 
+        self.purge_empty_nodes()
+
         if (self.config["use_anim"]):
             self.export_animations()