Add world indicators and parameters to enhance universe simulation

- new universe creation function.

stage/stage.gd

@@ -5,6 +5,9 @@ const OWNIVERSE_ITEM = preload("uid://d3xjfxwe3w16v")
 const SPEED_TEXTURE_NAME_TEMPLATE = "res://ui/topmenu/time&speed/time%s.png"
 
 const ItemDescription = preload("res://world/owniverse/item_description.gd")
+const WorldIndicators = preload("res://ui/indicators/world_indicators.gd")
+var world_indicators: RefCounted
+var indicator_elapsed: float = 0.0
 var description_targets: Dictionary = {}
 var description_samples: Dictionary = {}
 var description_rates: Dictionary = {}
@@ -317,15 +320,10 @@ func _page_action_pressed(page_id: int, action_amount: float) -> void:
 
 func _ready() -> void:
     get_tree().auto_accept_quit = false
-    var inited_result = init_enitities()
-    locked_items = inited_result.locked_items
+    world_indicators = WorldIndicators.new(self)
+    create_new_universe()
     load_data()
-    _init_owniverse_items()
-    owniverse.refresh_item_amounts()
-    _change_speed(0)
-    set_datetime(owniverse.state.time.year)
-    set_owniverse_item_value()
-    _unlock_items()
+    _refresh_universe_ui()
     
     g_counters.swipe.sec = 0.2
 
@@ -333,10 +331,57 @@ func _ready() -> void:
         page_actions[pa].action_pressed.connect(_page_action_pressed)
         page_actions[pa].page_id = pa
 
+
+## Starts a fresh universe. Can be connected directly to a button's pressed signal.
+## Saving continues through the normal autosave/close path.
+func create_new_universe() -> void:
+    var previous: Owniverse = owniverse
+    owniverse = Owniverse.new()
+    var inited_result: Dictionary = init_enitities()
+    locked_items = inited_result.locked_items
+    owniverse.new_state = owniverse.state
+    for entity in previous.entities.values():
+        entity.free()
+    previous.free()
+
+    if is_instance_valid(g_tween):
+        g_tween.kill()
+    g_active_items.clear()
+    description_targets.clear()
+    description_samples.clear()
+    description_rates.clear()
+    description_elapsed = 0.0
+    for label in g_item_descriptions:
+        label.text = ""
+    for item in owniverse_items.values():
+        item.get_parent().remove_child(item)
+        item.queue_free()
+    _init_owniverse_items()
+    for page in range(5, item_pages.size()):
+        item_pages[page].visible = false
+    for actions in page_actions.values():
+        actions.set_actions("", 0.0)
+    pending_page = RESOURCE_PAGE
+    _restore_page.call_deferred()
+    _refresh_universe_ui()
+    _on_topmenu_button_pressed("World")
+
+
+func _refresh_universe_ui() -> void:
+    owniverse.refresh_item_amounts()
+    _change_speed(0)
+    set_datetime(owniverse.state.time.year)
+    set_owniverse_item_value()
+    _unlock_items()
+    if world_indicators != null: world_indicators.update(owniverse)
     
 func _process(delta: float) -> void:
     
     owniverse.evolute(delta)
+    indicator_elapsed += delta
+    if indicator_elapsed >= 0.1:
+        indicator_elapsed = 0.0
+        world_indicators.update(owniverse)
     _update_descriptions(delta)
     set_owniverse_item_value()
     set_datetime(owniverse.state.time.year)