godot-moontiler/ChunkSystem.gd

extends Spatial

var Chunk = preload("res://chunk.tscn")
onready var Player = $"../Player"

var resolution = 512
var radius = 1737.4
var renderDistance = 1

var chunkIndex = {}

# Called when the node enters the scene tree for the first time.
func _ready():
	pass # Replace with function body.


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta):
	var playerSpos = Player.getSpos()
	var playerRoundSpos = playerSpos.round()
	var playerChunkPos = Vector2(int(playerRoundSpos.x), int(playerRoundSpos.y))
	var playerInterChunkPos = Vector2(playerSpos.x - playerChunkPos.x, playerSpos.y - playerChunkPos.y)
	
	for i in [Vector2(1,0),Vector2(1,1),Vector2(0,1),Vector2(-1,0),Vector2(0,-1),Vector2(-1,-1),Vector2(1,-1),Vector2(-1,1)]:
		var dist = Vector2(playerSpos.x, playerSpos.y).distance_to(playerChunkPos+i+Vector2(0.5,0.5))
		if dist < renderDistance:
			add_chunk(playerChunkPos+i)


func add_chunk(chunkPos = Vector2()):
	var lat = int(chunkPos.x)
	var lon = int(chunkPos.y)
	if chunkIndex.has(lon) and chunkIndex[lon].has(lat):
		return
	var chunk = Chunk.instance()
	chunk.setParams(lat,lat+1,lon,lon+1,resolution,radius)
	#moontile.scale=Vector3(1000,1000,1000)
	.add_child(chunk)
	if not chunkIndex.has(lon):
		chunkIndex[lon]={}
	chunkIndex[lon][lat] = chunk

func remove_chunk(chunkPos = Vector2()):
	var lat = int(chunkPos.x)
	var lon = int(chunkPos.y)
	if chunkIndex.has(lon) and chunkIndex[lon].has(lat):
		chunkIndex[lon][lat].queue_free()
		chunkIndex[lon].delete(lat)