extends Spatial

export var size: int = 1024
var heightmap: Image = Image.new()

signal world_generated

func _ready():
#	init_heightmap()
	init_noisemap()
	pass
	

func init_heightmap():
	heightmap.create(size, size, 0, Image.FORMAT_RF)
	heightmap.lock()
	for i in range (size):
		for j in range (size):
			if (i + j) % 2 == 0:
				heightmap.set_pixel(i, j, Color(0.1, 0.0, 0.0))
			else:
				heightmap.set_pixel(i, j, Color(0.0, 0.0, 0.0))
	heightmap.unlock()


func init_noisemap():
	var noise_texture = NoiseTexture.new()
	var noise_generator = OpenSimplexNoise.new()
	
	noise_generator.seed =  -1626828106#randi()
	print ("seed: ", noise_generator.seed)
	noise_generator.octaves = 3
	noise_generator.period = 5
	noise_generator.persistence = 0.5
	noise_generator.lacunarity = 2
	noise_texture.seamless = true
	
	heightmap.copy_from(noise_generator.get_seamless_image(size))
	
	emit_signal("world_generated")


func get_height(coord: Vector2) -> float:
	return heightmap.get_pixel(coord.x, coord.y).r * 3 - 1.5