better workaround for imgui not rendering on first frame

OGRECave · May 7, 2024 · a3001c0 · a3001c0
1 parent 390e0a9
commit a3001c0
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/ogre_mesh_viewer.py b/ogre_mesh_viewer.py
@@ -748,7 +748,9 @@ def setup(self):
         self.gui = MeshViewerGui(self)
         self.getRenderWindow().addListener(self.gui)
 
-        self.getRoot().renderOneFrame()
+        # imgui needs warmup to render on first frame
+        # see https://github.com/ocornut/imgui/issues/1893#issuecomment-399102821
+        self.getRenderWindow().update(False)
         self.getRoot().renderOneFrame()
 
         Ogre.LogManager.getSingleton().logMessage(f"Opening file: {os.path.normpath(self.infile)}")