New feature: before exporting a collection check its view_layer.exclude + verification test

Author: emanuelegissi

ext.py

@@ -163,14 +163,32 @@ class BFCollection:
     Extension of Blender Collection.
     """
 
+    def get_layer_collection(self, context, _layer_collection=None):
+        """!
+        Return related layer_collection in current context.
+        @param context: the Blender context.
+        @param _layer_collection: internal use for recursivity.
+        @return layer_collection related to self in current context.
+        """
+        if not _layer_collection:
+            _layer_collection = context.view_layer.layer_collection
+        found = None
+        if _layer_collection.name == self.name:
+            return _layer_collection
+        for c in _layer_collection.children:
+            found = self.get_layer_collection(context, _layer_collection=c)
+            if found:
+                return found
+
     def to_fds(self, context):
         """!
         Return the FDS formatted string.
         @param context: the Blender context.
         @return FDS formatted string, eg. "&OBST ID='Test' /".
         """
-        if self.hide_render:
-            return
+        layer_collection = self.get_layer_collection(context)
+        if self.hide_render or layer_collection.exclude:
+            return  # exclude from exporting
         obs = list(self.objects)
         obs.sort(key=lambda k: k.name)  # alphabetic by name
         lines = list(ob.to_fds(context) for ob in obs)
@@ -187,6 +205,7 @@ def register(cls):
         @param cls: class to be registered.
         """
         Collection.to_fds = cls.to_fds
+        Collection.get_layer_collection = cls.get_layer_collection
 
     @classmethod
     def unregister(cls):
@@ -195,6 +214,7 @@ def unregister(cls):
         @param cls: class to be unregistered.
         """
         del Collection.to_fds
+        del Collection.get_layer_collection
 
 
 class BFScene: