Removing superfluous code, updating camera a bit

components/scripts/free_camera_game_camera_component.gd

@@ -0,0 +1,119 @@
+extends Camera2D
+class_name GameCamera
+
+@export var key : bool = true
+@export var drag : bool = true
+@export var edge : bool = false
+@export var wheel : bool = true
+
+@export var zoom_in_limit : float = 2.5 # The max vector2 zoom value 
+
+@export var camera_speed : int = 450 # Camera speed in px/s
+@export var camera_margin : int = 50 # Pixels around edge of screen where the mouse will start moving the camera
+
+# Initial zoom value taken from Editor.
+var camera_zoom : Vector2 = zoom
+
+const camera_zoom_speed = Vector2(0.5, 0.5)
+var camera_movement : Vector2 = Vector2.ZERO
+var _prev_mouse_pos : Vector2 = Vector2.ZERO
+
+# INPUTS
+
+# Right mouse button was or is pressed.
+var __rmbk : bool = false
+# Move camera by keys: left, top, right, bottom.
+var __keys : Array[bool] = [false, false, false, false]
+
+func _ready() -> void:
+	set_drag_horizontal_enabled(false)
+	set_drag_vertical_enabled(false)
+	set_position_smoothing_enabled(true)
+	set_position_smoothing_speed(4)
+
+func _physics_process(delta : float) -> void:
+	
+	# Move camera by keys defined in InputMap (ui_left/top/right/bottom).
+	if key:
+		if __keys[0]:
+			camera_movement.x -= camera_speed * delta
+		if __keys[1]:
+			camera_movement.y -= camera_speed * delta
+		if __keys[2]:
+			camera_movement.x += camera_speed * delta
+		if __keys[3]:
+			camera_movement.y += camera_speed * delta
+	
+	# Move camera by mouse, when it's on the margin (defined by camera_margin).
+	if edge:
+		var rec : Rect2 = get_viewport().get_visible_rect()
+		var v : Vector2 = get_local_mouse_position() + rec.size/2
+		if rec.size.x - v.x <= camera_margin:
+			camera_movement.x += camera_speed * delta
+		if v.x <= camera_margin:
+			camera_movement.x -= camera_speed * delta
+		if rec.size.y - v.y <= camera_margin:
+			camera_movement.y += camera_speed * delta
+		if v.y <= camera_margin:
+			camera_movement.y -= camera_speed * delta
+	
+	# When RMB is pressed, move camera by difference of mouse position
+	if drag and __rmbk:
+		camera_movement = _prev_mouse_pos - get_local_mouse_position()
+
+	# If this movement would take us  out of clamp we don't want to do it:
+	var position_change : Vector2 = camera_movement * get_zoom()
+
+	if (position.x + position_change.x) <= limit_left or\
+		(position.x + position_change.x) >= limit_right:
+		camera_movement.x = 0
+
+	if (position.y + position_change.y) <= limit_top or\
+		(position.y + position_change.y) >= limit_bottom:
+		camera_movement.y = 0
+	
+	if camera_movement.y != 0 or camera_movement.x != 0:
+		# Update position of the camera.
+		position += camera_movement * get_zoom()
+		
+	# Set camera movement to zero, update old mouse position.
+	camera_movement = Vector2(0,0)
+	_prev_mouse_pos = get_local_mouse_position()
+
+func _unhandled_input( event : InputEvent) ->void:
+	if event is InputEventMouseButton:
+		var mouse_event : InputEventMouseButton = event as InputEventMouseButton	
+		if drag and\
+		   mouse_event.button_index == MOUSE_BUTTON_RIGHT:
+			# Control by right mouse button.
+			if mouse_event.pressed: __rmbk = true
+			else: __rmbk = false
+		# Check if mouse wheel was used. Not handled by InputMap!
+		if wheel:
+			if mouse_event.button_index == MOUSE_BUTTON_WHEEL_DOWN and\
+			camera_zoom.x - camera_zoom_speed.x > 0 and\
+			camera_zoom.y - camera_zoom_speed.y > 0:
+				camera_zoom -= camera_zoom_speed
+				set_zoom(camera_zoom)
+			if mouse_event.button_index == MOUSE_BUTTON_WHEEL_UP and\
+			camera_zoom.x + camera_zoom_speed.x < zoom_in_limit and\
+			camera_zoom.y + camera_zoom_speed.y < zoom_in_limit:
+				camera_zoom += camera_zoom_speed
+				set_zoom(camera_zoom)
+	# Control by keyboard handled by InpuMap.
+	if event.is_action_pressed("ui_left"):
+		__keys[0] = true
+	if event.is_action_pressed("ui_up"):
+		__keys[1] = true
+	if event.is_action_pressed("ui_right"):
+		__keys[2] = true
+	if event.is_action_pressed("ui_down"):
+		__keys[3] = true
+	if event.is_action_released("ui_left"):
+		__keys[0] = false
+	if event.is_action_released("ui_up"):
+		__keys[1] = false
+	if event.is_action_released("ui_right"):
+		__keys[2] = false
+	if event.is_action_released("ui_down"):
+		__keys[3] = false