Added region-stepped origin.

scripts/origin/region_origin.gd

@@ -0,0 +1,25 @@
+# no name - meant to be an autoload
+# Handles regional origin.
+extends Node
+
+@export var region_size := 1000.0
+@export var origin := Vector3i.ZERO
+@export var anchor: RegionTransform
+
+var nodes_to_move: Dictionary[Node3D, bool]
+
+func _physics_process(_delta: float) -> void:
+    if (anchor and anchor.region != origin):
+        move_origin(anchor.region)
+
+func add_node(new_node: Node3D) -> void:
+    nodes_to_move[new_node] = true
+
+func remove_node(old_node: Node3D) -> void:
+    nodes_to_move.erase(old_node)
+    
+func move_origin(new_origin: Vector3i) -> void:
+    origin = new_origin
+    var move_amount := Vector3(new_origin - origin * 1000)
+    for node in nodes_to_move:
+        node.transform.origin += move_amount