Setup background and scrolling stuff

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game_scene.tscn

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+[node name="main_game_background_tiles" type="TileMapLayer" parent="." unique_id=643550399]
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+[node name="main_game_camera" type="Camera2D" parent="." unique_id=1094262036]
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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

main_game_background_tiles.gd.uid

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main_game_camera.gd

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+extends Camera2D
+
+# --- Movement Settings ---
+@export var KEYBOARD_SPEED: float = 500.0  # Pixels per second using keys
+@export var EDGE_SPEED: float = 600.0      # Pixels per second using mouse edge
+@export var EDGE_MARGIN: float = 20.0      # How close to the screen edge (in pixels) to trigger scroll
+
+# --- Zoom Settings ---
+@export var MIN_ZOOM: float = 0.5          # Furthest zoomed out
+@export var MAX_ZOOM: float = 3.0          # Closest zoomed in
+@export var ZOOM_SPEED: float = 0.1        # How fast it zooms per scroll tick
+var target_zoom: float = 1.0               # Smoothly interpolate to this value
+
+func _ready() -> void:
+	# Ensures the camera uses its actual starting zoom
+	target_zoom = zoom.x
+
+func _process(delta: float) -> void:
+	handle_keyboard_movement(delta)
+	handle_edge_scrolling(delta)
+	handle_smooth_zoom(delta)
+
+# 1. ARROW KEYS / WASD MOVEMENT
+func handle_keyboard_movement(delta: float) -> void:
+	var velocity = Vector2.ZERO
+	
+	if Input.is_key_pressed(KEY_LEFT) or Input.is_key_pressed(KEY_A):
+		velocity.x -= 1
+	if Input.is_key_pressed(KEY_RIGHT) or Input.is_key_pressed(KEY_D):
+		velocity.x += 1
+	if Input.is_key_pressed(KEY_UP) or Input.is_key_pressed(KEY_W):
+		velocity.y -= 1
+	if Input.is_key_pressed(KEY_DOWN) or Input.is_key_pressed(KEY_S):
+		velocity.y += 1
+		
+	# Move the camera based on direction, speed, and time passed
+	global_position += velocity.normalized() * KEYBOARD_SPEED * delta
+
+# 2. MOUSE EDGE SCROLLING
+func handle_edge_scrolling(delta: float) -> void:
+	var mouse_pos = get_viewport().get_mouse_position()
+	var window_size = get_viewport().get_visible_rect().size
+	var velocity = Vector2.ZERO
+
+	# Check Left/Right edges
+	if mouse_pos.x < EDGE_MARGIN:
+		velocity.x -= 1
+	elif mouse_pos.x > window_size.x - EDGE_MARGIN:
+		velocity.x += 1
+
+	# Check Top/Bottom edges
+	if mouse_pos.y < EDGE_MARGIN:
+		velocity.y -= 1
+	elif mouse_pos.y > window_size.y - EDGE_MARGIN:
+		velocity.y += 1
+
+	global_position += velocity.normalized() * EDGE_SPEED * delta
+
+# 3. MOUSE WHEEL ZOOM (Detecting the inputs)
+func _unhandled_input(event: InputEvent) -> void:
+	if event is InputEventMouseButton:
+		if event.button_index == MOUSE_BUTTON_WHEEL_UP and event.pressed:
+			target_zoom = clamp(target_zoom + ZOOM_SPEED, MIN_ZOOM, MAX_ZOOM)
+		elif event.button_index == MOUSE_BUTTON_WHEEL_DOWN and event.pressed:
+			target_zoom = clamp(target_zoom - ZOOM_SPEED, MIN_ZOOM, MAX_ZOOM)
+
+# 4. SMOOTH ZOOMING ANIMATION
+func handle_smooth_zoom(delta: float) -> void:
+	# Lerp smoothly transitions the current zoom to our target_zoom over time
+	var current_zoom = zoom.x
+	var new_zoom = lerp(current_zoom, target_zoom, 10.0 * delta)
+	zoom = Vector2(new_zoom, new_zoom)

main_game_camera.gd.uid

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project.godot

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+; Engine configuration file.
+; It's best edited using the editor UI and not directly,
+; since the parameters that go here are not all obvious.
+;
+; Format:
+;   [section] ; section goes between []
+;   param=value ; assign values to parameters
+
+config_version=5
+
+[application]
+
+config/name="numberFactory"
+run/main_scene="res://game_scene.tscn"
+config/features=PackedStringArray("4.7", "GL Compatibility")
+config/icon="res://icon.svg"
+
+[display]
+
+window/stretch/mode="canvas_items"
+window/stretch/aspect="expand"
+
+[physics]
+
+3d/physics_engine="Jolt Physics"
+
+[rendering]
+
+rendering_device/driver.windows="d3d12"
+renderer/rendering_method="gl_compatibility"
+renderer/rendering_method.mobile="gl_compatibility"