Use COMPAT_ENGINES instead of RenderEngine.use_game_engine for panel poll methods

This mostly affects physics panels. Any engines relying on
RenderEngine.use_game_engine flag to show/hide panels will need to be
updated. The COMPAT_ENGINES technique is how we usually deal with this.
One issue with use_game_engine is that I cannot find a way to set it; it
appears only the BGE can set it. This means (without this commit)
external RenderEngines cannot get rid of the default physics panels.

The RE_GAME flag (the C flag behind use_game_engine) is pretty hacky
and we should look into removing its usage where possible.

1 files changed, 2 insertions, 2 deletions

diff --git a/release/scripts/startup/bl_ui/properties_world.py b/release/scripts/startup/bl_ui/properties_world.py
index 2c8a6fac967..e07349a99ee 100644
--- a/release/scripts/startup/bl_ui/properties_world.py
+++ b/release/scripts/startup/bl_ui/properties_world.py
@@ -41,7 +41,7 @@ class WORLD_PT_context_world(WorldButtonsPanel, Panel):
     @classmethod
     def poll(cls, context):
         rd = context.scene.render
-        return (not rd.use_game_engine) and (rd.engine in cls.COMPAT_ENGINES)
+        return rd.engine in cls.COMPAT_ENGINES
 
     def draw(self, context):
         layout = self.layout
@@ -69,7 +69,7 @@ class WORLD_PT_preview(WorldButtonsPanel, Panel):
     @classmethod
     def poll(cls, context):
         rd = context.scene.render
-        return (context.world) and (not rd.use_game_engine) and (rd.engine in cls.COMPAT_ENGINES)
+        return (context.world) and (rd.engine in cls.COMPAT_ENGINES)
 
     def draw(self, context):
         self.layout.template_preview(context.world)