Gizmos - simple line connecting the portals

addons/portal_gizmos/gizmo.gd

@@ -0,0 +1,42 @@
+extends EditorNode3DGizmoPlugin
+
+func _init():
+	print("[gizmo] _init")
+	create_material("main", Color(1,0,1), false, true, false)
+	
+
+func _get_gizmo_name() -> String:
+	return "PortalGizmo"
+
+
+func _has_gizmo(for_node_3d: Node3D) -> bool:
+	var result: bool = for_node_3d is Portal
+	if result: print("[gizmo] _has_gizmo: " + for_node_3d.name)
+	return result
+
+
+func _redraw(gizmo):
+	var node3d = gizmo.get_node_3d() as Portal
+	print("[gizmo] _redraw: " + node3d.name)
+	
+	gizmo.clear() # Always clear the gizmo
+	
+	if node3d not in EditorInterface.get_selection().get_selected_nodes():
+		return  # If not selected, don't draw anything
+
+
+	var lines = PackedVector3Array()
+
+	lines.push_back(Vector3(0, 0, 0))
+	
+	if node3d.exit_portal != null:
+		lines.push_back(node3d.to_local(node3d.exit_portal.global_position))
+	else:
+		lines.push_back(Vector3(5, 5, 5))
+
+	#var handles = PackedVector3Array()
+	#handles.push_back(Vector3(0, 1, 0))
+	#handles.push_back(Vector3(0, 2, 0))
+
+	gizmo.add_lines(lines, get_material("main", gizmo), false)
+	#gizmo.add_handles(handles, get_material("handles", gizmo), [])

addons/portal_gizmos/gizmo.gd.uid

@@ -0,0 +1 @@
+uid://b8vlwx31bxx4b

addons/portal_gizmos/plugin.cfg

@@ -0,0 +1,7 @@
+[plugin]
+
+name="Portal Gizmos"
+description="Plugin providing 3D Gizmos for portals"
+author="Vojtech Struhar"
+version="0.1"
+script="portal_gizmos.gd"

addons/portal_gizmos/portal_gizmos.gd

@@ -0,0 +1,13 @@
+@tool
+extends EditorPlugin
+
+const GIZMO_PACKED = preload("gizmo.gd")
+var gizmo = GIZMO_PACKED.new()
+
+func _enter_tree() -> void:
+	print("[portal_gizmos] Enter")
+	add_node_3d_gizmo_plugin(gizmo)
+
+func _exit_tree() -> void:
+	print("[portal_gizmos] Exit")
+	remove_node_3d_gizmo_plugin(gizmo)

addons/portal_gizmos/portal_gizmos.gd.uid

@@ -0,0 +1 @@
+uid://c61kmx68labq0

project.godot

@@ -20,6 +20,10 @@ config/icon="res://icon.svg"
 window/size/viewport_width=1920
 window/size/viewport_height=1080
 
+[editor_plugins]
+
+enabled=PackedStringArray("res://addons/portal_gizmos/plugin.cfg")
+
 [input]
 
 move_left={