Connected the dialog box to the NPC

ArrowGirl/ArrowGirl.gd

@@ -1,5 +1,6 @@
 class_name ArrowGirl extends Area2D
 
+@onready var _dialogController = $/root/Scene/DialogController
 @onready var _sprite = $AnimatedSprite2D
 
 #boilerplate
@@ -12,3 +13,11 @@ func _on_animation_finished() -> void:
 		_sprite.play("idle_glance", 2)
 	else:
 		_sprite.play("idle", 2)
+
+func _on_body_entered(body) -> void:
+	if body is BoxBoy:
+		_dialogController.set_dialog("Hello.", 0.2)
+
+func _on_body_exited(body) -> void:
+	if body is BoxBoy:
+		_dialogController.set_dialog("")

ArrowGirl/ArrowGirl.tscn

@@ -52,4 +52,6 @@ metadata/_edit_lock_ = true
 shape = SubResource("RectangleShape2D_53v1e")
 metadata/_edit_lock_ = true
 
+[connection signal="body_entered" from="." to="." method="_on_body_entered"]
+[connection signal="body_exited" from="." to="." method="_on_body_exited"]
 [connection signal="animation_finished" from="AnimatedSprite2D" to="." method="_on_animation_finished"]

Controllers/DialogController.gd

@@ -3,9 +3,7 @@ extends Node
 @export var dialogContainer: MarginContainer
 @export var dialogTextLabel: RichTextLabel
 
-const INCREMENT: float = 0.01
-
-func set_dialog(text: String) -> void:
+func set_dialog(text: String, seconds: float = 1) -> void:
 	dialogTextLabel.text = text
 	dialogTextLabel.visible_ratio = 0
 	var ratio: float = 0
@@ -16,10 +14,12 @@ func set_dialog(text: String) -> void:
 	else:
 		dialogContainer.visible = true
 	
+	var increment: float = (1 / seconds)/ 60.0
+	
 	while true:
 		#don't interfere with other timers
 		if dialogTextLabel.visible_ratio < ratio or dialogTextLabel.visible_ratio >= 1:
 			return
-		dialogTextLabel.visible_ratio += INCREMENT
+		dialogTextLabel.visible_ratio += increment
 		ratio = dialogTextLabel.visible_ratio
-		await get_tree().create_timer(INCREMENT).timeout
+		await get_tree().create_timer(1.0/60.0).timeout #update proportional to 60 FPS