Generates terrain

terrain.gd

extends TileMap

# Declare member variables here. Examples:
# var a = 2
# var b = "text"

var height = 5
var width = 500
var loops = 6


# Called when the node enters the scene tree for the first time.
func _ready():
	generate()

func generate():
	var points = [0,0]
	for i in range(loops):
		points = sub_div(points,height/(i+1))
	
	var x = 0
	for x in width:
		var p = (float(x) / float(width)) * (len(points)-1.0)
		var min_point = floor(p)
		var max_point = ceil(p)
		var point = (p-min_point)*points[min_point] + (1-p-min_point)*points[max_point]
		set_cell(x,point,0)
		set_cell(x,point+1,0)
		set_cell(x,point+2,0)
		set_cell(x,point+3,0)
		
func sub_div(points,max_shift):
	var out_points = []
	for i in range(len(points)-1):
		out_points.append(points[i])
		var new_point = randf() * max_shift + (points[i] + points[i+1]) / 2
		out_points.append(new_point)
	
	out_points.append(points[-1])
	return out_points