Setup background and scrolling stuff

main_game_background_tiles.gd

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+extends TileMapLayer
+
+@onready var camera: Camera2D = $"../main_game_camera"
+
+@export var render_radius: int = 20 # How many tiles out from the center to draw
+var tile_size: Vector2i = Vector2i(32, 32) # Change this to your actual asset square size (e.g., 32x32, 64x64)
+
+# Keep track of which grid coordinates we've already loaded
+var loaded_tiles: Dictionary = {}
+
+# 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 camera:
+		generate_tiles_around_camera()
+
+func generate_tiles_around_camera() -> void:
+	# 1. Convert the camera's pixel position into grid coordinates
+	var camera_grid_pos = self.local_to_map(camera.global_position)
+	
+	# 2. Loop through a square grid area around the camera
+	for x in range(camera_grid_pos.x - render_radius / camera.zoom[0], camera_grid_pos.x + render_radius / camera.zoom[0]):
+		for y in range(camera_grid_pos.y - render_radius / camera.zoom[1], camera_grid_pos.y + render_radius / camera.zoom[1]):
+			var tile_coords = Vector2i(x, y)
+			
+			# 3. Only place a tile if we haven't already placed one there
+			if not loaded_tiles.has(tile_coords):
+				# set_cell(coords, source_id, atlas_coords)
+				# Assumes your source_id is 0 and your square tile is at (0,0) in the atlas
+				self.set_cell(tile_coords, 0, Vector2i(0, 0))
+				loaded_tiles[tile_coords] = true