bugfix: adjust 'limits' on upper/lower X value to be dynamic, rather than static

src/empty_space_thing.gd

@@ -1,31 +1,84 @@
 extends Control
 class_name SpaceNode
 
+# adapted from pc_tile code (project-elysium-main)
 var initial_pos: Vector2
 var offset: Vector2
 var draggable: bool = false
+var velocity: float = 0
+
+# variables for velocity calculation
+var mouse_first_location: Vector2
+var mouse_last_location: Vector2
+var mouse_release_location: Vector2
+var mouse_n_minus_one_location: Vector2
+var time_since_first_location: float = -1
+
+# Export variables, for ease of setting without going into the code
+@export var velocity_coeffecient: int = 500
+@export var max_x: int = 1000
+@export var min_x: int = 0
+@export var ease_out_time: float = 0.5
+@export var bounce: bool = false
 
 func _ready() -> void:
 	draggable = true
 	return
 	
 func _process(delta: float) -> void:
+	global_position.x += velocity
 	if draggable:
+		if (Input.is_action_just_pressed("click")):
+			mouse_first_location = get_global_mouse_position()
+			offset = get_local_mouse_position() - global_position
+		
+		if Input.is_action_pressed("click"):
+			mouse_first_location = get_global_mouse_position()
+			global_position.x += -(mouse_last_location.x - mouse_first_location.x)
 		
-		if Input.is_action_pressed("click", true):
-			self.global_position = Vector2(get_global_mouse_position().x, self.global_position.y)
-			
 		elif Input.is_action_just_released("click"):
+			time_since_first_location += delta
+			mouse_release_location = get_global_mouse_position()
+			if mouse_release_location.x < mouse_first_location.x:
+				var distance = mouse_release_location.x - mouse_first_location.x
+				velocity = (distance / 
+					(velocity_coeffecient * delta))
+				draggable = false
+				
+			elif mouse_release_location.x > mouse_first_location.x:
+				var distance = abs(mouse_first_location.x 
+					- mouse_release_location.x)
+				velocity = (distance / 
+					(velocity_coeffecient * delta))
+				draggable = false
 			
-			is_dragging.is_dragging = false
+			# when the drag is complete, create a tween to ease out towards zero
 			var tween = get_tree().create_tween()
 			
-			tween.tween_property(self, "global_position", Vector2(get_global_mouse_position().x, self.global_position.y), 0.5).set_ease(Tween.EASE_IN_OUT)
+			tween.tween_property(self, "velocity", 
+			0, ease_out_time).set_ease(Tween.EASE_OUT)
 			
-		else:
-			return
-
-func reset_draggable():
-	if not is_dragging.is_dragging:
-		is_dragging.is_dragging = false
-		draggable = false
+			mouse_first_location = Vector2(0,0)
+			mouse_release_location = Vector2(0,0)
+			
+			draggable = true
+		
+	if global_position.x >= max_x && velocity > 0:
+		if bounce:
+			velocity = -(velocity)/2
+			print("velocity negated, bouncing")
+		global_position.x = max_x - 1
+		time_since_first_location = -1
+		draggable = true
+		return
+		
+	elif global_position.x < min_x && velocity < 0:
+		if bounce:
+			velocity = -(velocity)/2
+			print("velocity negated, bouncing")
+		global_position.x = min_x + 1
+		time_since_first_location = -1
+		draggable = true
+		return
+		
+	mouse_last_location = get_global_mouse_position()

src/scroll_root.tscn

@@ -23,3 +23,4 @@ offset_top = 299.0
 offset_right = 455.0
 offset_bottom = 299.0
 script = ExtResource("2_mej84")
+velocity_coeffecient = 110