Restructuring of Nodes and Scenes. Added WorldCamera. Added a Main Scene.

Scenes/Main/main.gd

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+extends Node
+
+@onready var _Map = $Map
+@onready var _Player = $Player
+@onready var _Camera = $WorldCamera
+
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	_Map.populate_terrain(_Camera.global_position)
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	pass

Scenes/Main/main.gd.uid

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+uid://btdvxp8ckmeb3

Scenes/Main/main.tscn

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+[gd_scene load_steps=4 format=3 uid="uid://d05j5yuhlsxp0"]
+
+[ext_resource type="PackedScene" uid="uid://cywuuce71rmgb" path="res://Scenes/Map/map.tscn" id="1_1r6ip"]
+[ext_resource type="Script" uid="uid://btdvxp8ckmeb3" path="res://Scenes/Main/main.gd" id="1_qw60k"]
+[ext_resource type="PackedScene" uid="uid://dh8pjs2s1kud3" path="res://Scenes/Player/player.tscn" id="2_lixft"]
+
+[node name="Main" type="Node"]
+script = ExtResource("1_qw60k")
+
+[node name="Map" parent="." instance=ExtResource("1_1r6ip")]
+
+[node name="Player" parent="." instance=ExtResource("2_lixft")]
+
+[node name="WorldCamera" type="Camera2D" parent="."]
+
+[editable path="Player"]

Scenes/Main/world_camera.gd

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+extends Camera2D
+
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	pass # Replace with function body.
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	pass

Scenes/Main/world_camera.gd.uid

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+uid://cpp4vte6rs37q

Scenes/Map/Map.gd

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+extends Node
+
+const TERRAIN_LAYER_ID: int = 0
+const OBSTACLE_LAYER_ID: int = 1
+const TERRAIN_SOURCE_ID: int = 1
+const OBSTACLE_SOURCE_ID: int = 2
+const CHUNK_SIZE: int = 15
+const CLEAN_UP_EVERY: int = 3
+const OBSTACLE_PROBABILITY: float = 0.01
+
+var _source: TileSetAtlasSource
+var _obstacle_source: TileSetAtlasSource
+var _tile_probabilities: Dictionary
+var _obstacle_probabilities: Dictionary
+var _clean_up_counter: int
+
+const CHUNK_DOUBLE: int = CHUNK_SIZE*2;
+
+const GREEN_TILE: Vector2i  = Vector2i(1, 1)
+
+var tilemap: TileMap;
+
+@onready var Player = $Player/AnimatedSprite2D
+@onready var GroundLayer: TileMapLayer = $Ground
+
+func _get_player_position() -> Vector2i:
+	var playerPosition: Vector2i = GroundLayer.local_to_map(Player.global_position)
+	print("Playerposition is " + str(playerPosition))
+	return playerPosition
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	_source = $Ground.tile_set.get_source(TERRAIN_SOURCE_ID) as TileSetAtlasSource
+	var grid_size: Vector2i = _source.get_atlas_grid_size()
+	for i in range(grid_size.x):
+		for j in range(grid_size.y):
+			var atlas_coords: Vector2i = Vector2i(i, j)
+			var has_tile: bool = _source.has_tile(atlas_coords)
+			_tile_probabilities[atlas_coords] = (_source.get_tile_data(atlas_coords, 0).probability if has_tile else 0.0)
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	pass
+
+func _on_exited_chunk():
+	print("Chunk exited...")
+	$VisibleOnScreenNotifier2D.global_position = Player.global_position
+	
+	var thread: Thread = Thread.new()
+	thread.start(func(): _populate_terrain())
+	thread.wait_to_finish()
+
+func populate_terrain(startPos: Vector2i):
+	for i in range(-CHUNK_DOUBLE, CHUNK_DOUBLE):
+		for j in range(-CHUNK_DOUBLE, CHUNK_DOUBLE):
+			var pos: Vector2i = startPos + Vector2i(i, j)
+			if _is_empty(pos):
+				_populate_cell(pos, 1, _pick_random_tile())
+	
+func _populate_terrain():
+	var player_position: Vector2i = _get_player_position()
+	
+	for i in range(-CHUNK_DOUBLE, CHUNK_DOUBLE):
+		for j in range(-CHUNK_DOUBLE, CHUNK_DOUBLE):
+			var pos: Vector2i = player_position + Vector2i(i, j)
+			if _is_empty(pos):
+				_populate_cell(pos, 1, _pick_random_tile())
+				
+
+func _populate_cell(coords: Vector2i, source_id: int, atlas_coords: Vector2i) -> void:
+	var alternativeTilesCount: int = GroundLayer.tile_set.get_source(source_id).get_alternative_tiles_count(atlas_coords)
+	var alternativeTileId: int = 0
+	
+	if alternativeTilesCount > 0:
+		alternativeTileId = randi_range(0, alternativeTilesCount-1)
+	
+	# set_cell(coords: Vector2i, source_id: int = -1, atlas_coords: Vector2i = Vector2i(-1, -1), alternative_tile: int = 0)
+	GroundLayer.set_cell.call_deferred(coords, source_id, atlas_coords, alternativeTileId)
+	
+	
+func _pick_random_tile() -> Vector2i:
+	# Make all Tiles green
+	return Vector2i(1, 1)
+	
+func _is_empty(pos: Vector2i) -> bool:
+	# Check if the cell is empty (source_id is -1)
+	return true if GroundLayer.get_cell_source_id(pos) == -1 else false;

Scenes/Map/Map.gd.uid

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+uid://dneqmqsd8yj4p

Scenes/Map/map.tscn

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+[gd_scene load_steps=5 format=3 uid="uid://cywuuce71rmgb"]
+
+[ext_resource type="Script" uid="uid://dneqmqsd8yj4p" path="res://Scenes/Map/Map.gd" id="1_anho1"]
+[ext_resource type="TileSet" uid="uid://duodt2t14xjc8" path="res://Resource/UrbanKitTileMap.tres" id="2_fyo8k"]
+[ext_resource type="Script" uid="uid://bapvlrx6dm7gu" path="res://Scenes/Map/visible_on_screen_notifier_2d.gd" id="3_eu35m"]
+
+[sub_resource type="PlaceholderTexture2D" id="PlaceholderTexture2D_vjcy3"]
+
+[node name="Map" type="Node"]
+script = ExtResource("1_anho1")
+
+[node name="Ground" type="TileMapLayer" parent="."]
+tile_set = ExtResource("2_fyo8k")
+metadata/_edit_lock_ = true
+
+[node name="Roads" type="TileMapLayer" parent="."]
+tile_set = ExtResource("2_fyo8k")
+metadata/_edit_lock_ = true
+
+[node name="Buildings" type="TileMapLayer" parent="."]
+tile_set = ExtResource("2_fyo8k")
+metadata/_edit_lock_ = true
+
+[node name="Details" type="TileMapLayer" parent="."]
+tile_set = ExtResource("2_fyo8k")
+metadata/_edit_lock_ = true
+
+[node name="VisibleOnScreenNotifier2D" type="VisibleOnScreenNotifier2D" parent="."]
+rect = Rect2(0, 0, 100, 100)
+script = ExtResource("3_eu35m")
+metadata/_edit_lock_ = true
+metadata/_edit_group_ = true
+
+[node name="Sprite2D" type="Sprite2D" parent="VisibleOnScreenNotifier2D"]
+position = Vector2(50, 50)
+scale = Vector2(10, 10)
+texture = SubResource("PlaceholderTexture2D_vjcy3")
+
+[connection signal="screen_exited" from="VisibleOnScreenNotifier2D" to="." method="_on_exited_chunk"]

Scenes/Map/visible_on_screen_notifier_2d.gd

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+extends VisibleOnScreenNotifier2D
+
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	_calculateRect()
+	get_tree().root.size_changed.connect(_calculateRect)
+
+
+func _calculateRect():
+	var multiplier: float = get_viewport_rect().size.y / get_viewport_rect().size.x
+	var size: float = 640 / multiplier
+	
+	rect.position.y = -size/2
+	rect.size.y = size

Scenes/Map/visible_on_screen_notifier_2d.gd.uid

@@ -0,0 +1 @@
+uid://bapvlrx6dm7gu

Scenes/Player/player.gd

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+extends Area2D
+class_name Player
+
+const GROUP = "player"
+
+const _movementSpeed = 2
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	pass # Replace with function body.
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	if Input.is_action_pressed("MoveUp"):
+		$AnimatedSprite2D.global_position += Vector2.UP * 2
+	if Input.is_action_pressed("MoveDown"):
+		$AnimatedSprite2D.global_position += Vector2.DOWN * 2
+	if Input.is_action_pressed("MoveLeft"):
+		$AnimatedSprite2D.global_position += Vector2.LEFT * 2
+	if Input.is_action_pressed("MoveRight"):
+		$AnimatedSprite2D.global_position += Vector2.RIGHT * 2
+		
+	$Camera2D.global_position = $AnimatedSprite2D.global_position

Scenes/Player/player.gd.uid

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+uid://q6cxagn6igja

Scenes/Player/player.tscn

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+[gd_scene load_steps=5 format=3 uid="uid://dh8pjs2s1kud3"]
+
+[ext_resource type="Script" uid="uid://q6cxagn6igja" path="res://Scenes/Player/player.gd" id="1_a3d8c"]
+[ext_resource type="Texture2D" uid="uid://04ecsvg7ausn" path="res://icon.svg" id="2_xpcdj"]
+
+[sub_resource type="SpriteFrames" id="SpriteFrames_c3an2"]
+animations = [{
+"frames": [{
+"duration": 1.0,
+"texture": ExtResource("2_xpcdj")
+}],
+"loop": true,
+"name": &"default",
+"speed": 5.0
+}]
+
+[sub_resource type="RectangleShape2D" id="RectangleShape2D_vjcy3"]
+size = Vector2(32, 32)
+
+[node name="Player" type="Area2D" groups=["player"]]
+script = ExtResource("1_a3d8c")
+metadata/_edit_group_ = true
+metadata/_edit_lock_ = true
+
+[node name="AnimatedSprite2D" type="AnimatedSprite2D" parent="."]
+position = Vector2(4.76837e-07, -4.76837e-07)
+scale = Vector2(0.25, 0.25)
+sprite_frames = SubResource("SpriteFrames_c3an2")
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+shape = SubResource("RectangleShape2D_vjcy3")
+
+[node name="PlayerCamera" type="Camera2D" parent="."]
+zoom = Vector2(4, 4)