add overview doc, window placement

docs/README.md

@@ -0,0 +1,35 @@
+# WIP documentation
+
+## Hierarchy
+
+```
+OverlayManager
+- MyOverlayInstance
+  - [...]
+  - OverlayViewport
+    - Container
+	  - MyOverlay
+	- [...]
+  - OverlayInteraction
+    - VR
+		- [colliders for vr trackers etc]
+	- Grabbable
+	- Clickable
+	- Touchable
+
+```
+
+
+## overlay interaction types
+Each overlay instance has a OverlayInteraction node, which spawns the different interaction modules depending on what is defined in the OVERLAY_PROPERTIES.
+
+The modules/interaction types are:
+- Grabbable
+- Touchable
+- Clickable
+
+These modules connect signals from different places to the interaction manager (`OverlayInteraction`)
+Touchable connects collision signals to mouse inputs (potentially logic between to help prevent double presses)
+Clickable connects vr button signals to mouse inputs
+Grabbable connects vr button signals to grab logic, while telling the interaction manager to pause normal interaction
+

src/addons/openvr_overlay/overlay_init.gd

@@ -30,7 +30,10 @@ func _init() -> void:
 
 
 func _ready() -> void:
+	OS.window_size = Vector2(16, 16)
+	OS.window_position = Vector2(32, 32)
 	OS.window_minimized = true
+
 	ARVRServer.connect("tracker_added", self, "_tracker_added")
 	ARVRServer.connect("tracker_removed", self, "_tracker_removed")
 	update_hand_ids()