Add basic npc entity script.

scripts/Entities/OverworldEntity.gd

@@ -1,5 +1,4 @@
-extends CharacterBody3D
-class_name OverworldEntity
+class_name OverworldEntity extends CharacterBody3D
 
 const PauseSystem = preload("res://scripts/System/PauseSystem.gd")
 
@@ -14,7 +13,11 @@ var speed:float = 150;
 var friction:float = 8.5;
 var gravity:float = 30;
 
-var direction = Direction.SOUTH;
+@export var direction = Direction.SOUTH:
+	set(newDirection):
+		direction = newDirection;
+		_updateMaterial();
+
 var meshInstance:MeshInstance3D;
 var underFootTile:int = -1;
 var underFootPosition:Vector3;
@@ -22,6 +25,14 @@ var underFootPosition:Vector3;
 var withinMapBounds:MapBounds;
 var withinBoundsLastFrame:bool = true;
 
+func _updateMaterial():
+	if !meshInstance:
+		return
+	var material:ShaderMaterial = meshInstance.get_surface_override_material(0)
+	if !material:
+		return
+	material.set_shader_parameter("direction", direction)
+
 func getSystems() -> Systems:
 	return get_tree().current_scene.get_node("Systems") as Systems;
 
@@ -128,6 +139,7 @@ func _updateTileData() -> void:
 func _ready() -> void:
 	meshInstance = get_node("MeshInstance3D")
 	_updateTileData();
+	_updateMaterial();
 	pass
 
 func _process(delta:float) -> void:
@@ -144,10 +156,6 @@ func _process(delta:float) -> void:
 	
 	# Update logic
 	updateOverworldLogic(delta)
-	
-	# Set shader direction.
-	var material:ShaderMaterial = meshInstance.get_surface_override_material(0)
-	material.set_shader_parameter("direction", direction)
 
 func _physics_process(delta: float) -> void:
 	if isPaused():