MightyLiners2/Game.gd

extends Node2D

onready var cam = $MainCamera
onready var level = $Grid
var dist_max = 900
var zoom_rate = 0.001

var playerScene = preload("res://Player.tscn")

func _ready():
	var player

	# Player 1
	player = playerScene.instance()
	player.grid = level
	player.turn_left_action = "player_1_turn_left"
	player.turn_right_action = "player_1_turn_right"
	player.position = Vector2(4 * 64 + 32, 8 * 64 + 32)
	add_child(player)

	# Player 2
	player = playerScene.instance()
	player.grid = level
	player.turn_left_action = "player_2_turn_left"
	player.turn_right_action = "player_2_turn_right"
	player.position = Vector2(6 * 64 + 32, 8 * 64 + 32)
	add_child(player)

func _process(d):
	center_camera()

func center_camera():
	var living_players = []
	var position_accumulator = Vector2(0.0, 0.0)
	var players = get_tree().get_nodes_in_group("players")

	for p in players:
		if (p.is_alive()):
			living_players.append(p)
			position_accumulator += p.position

	if living_players.size() == 0:
		# Keep camera in the last position
		return

	cam.position = position_accumulator / living_players.size()

	var dist = 0
	for i in range(living_players.size() - 1):
		for j in range(i + 1, living_players.size()):
			dist = max(dist, living_players[i].position.distance_to(living_players[j].position))

	# Extend camera zoom if liners are far from each other
	var zoom = 1.0
	if dist > dist_max:
		zoom += (dist - dist_max) * zoom_rate

	cam.zoom = Vector2(zoom, zoom)