Procedural Generation in GDScript https://web.archive.org/web/20250212131706/https://chikorito.land/articles/2024-02-25-procgen-godot

world.gd

# world.gd

extends Node2D
class_name World

const TILE_SIZE = 32
const SEA_LEVEL = 0.0
const RENDER_DISTANCE = 16.0

@export var altitude_noise: FastNoiseLite
@export var tile: PackedScene

func _ready():
    for n in RENDER_DISTANCE:
        # We divide by two so that half the tiles
        # generate left/above center and half right/below
        var x = n - RENDER_DISTANCE / 2.0
        
        for m in RENDER_DISTANCE:
            var y = m - RENDER_DISTANCE / 2.0
            
            generate_terrain_tile(x, y)

func generate_terrain_tile(x: int, y: int):
    var tile = tile.instantiate()
    tile.tile_type = altitude_value(x, y)
    tile.position = Vector2(x, y) * TILE_SIZE
    add_child(tile)

func altitude_value(x: int, y: int) -> Tile.TileType:
    var value = altitude_noise.get_noise_2d(x, y)
    
    if value >= SEA_LEVEL:
        return Tile.TileType.LAND
        
    return Tile.TileType.SEA