extends Camera2D

var node_target : Node2D
export var pos_offset := Vector2.ZERO
export var pos_start := Vector2.ZERO
export var pos_target := Vector2.ZERO
export var pos_current := Vector2.ZERO
export var lerp_step := 0.1

export var is_focal_point := false
# between 0.0 and 1.0, distance of lerp between focal point and target
export var target_influence := 0.5

func _ready():
	Shared.node_camera_game = self
	pos_start = position
	pos_current = position
	
	# looks kinda ugly when using focal point
	if is_focal_point:
		drag_margin_h_enabled = false
		drag_margin_v_enabled = false

func _process(delta):
	if node_target:
		if is_focal_point:
			pos_target = pos_start.linear_interpolate(node_target.position + pos_offset, target_influence)
			pass
		else:
			pos_target = node_target.position + pos_offset
	# smoothing
	pos_current = pos_current.linear_interpolate(pos_target, lerp_step)
	
	position.x = round(pos_current.x)
	position.y = round(pos_current.y)