Scene Manager

Add a SceneManager script to a Godot that communicates between the components of a scene.

1. Setting up the Godot Project

• Start with the project created in the previous lab, or Download the Default Project Template folder
• Continue working with your PlayerController script from The Programming Intro lab or add the PlayerSimple.gd from Assets if needed
• Use the DefaultSimple scene or a new scene and add a SceneManager node as the first node in the scene hierarchy

2. Create SceneManager.gd script

• This script is used to communicate between objects and events in the scene
• Get a reference to the player

4. Update the PlayerController

• Add an “Enemy” Area2D to interact with the player
• Add a signal to the PlayerController to communicate with the SceneManager

5. Log the player signal

• Use the Godot Debug Logger to print statements on signal events

6. Add an Item

• Add an “Item” Area2D to update the Global item_count value

7. Add another example Area

• Make another area for the player to interact with, it could be a key, a door, an NPC character or something else that would occur in a game
• Change the debug print statement to show the player is interacting with something new

8. Documentation

• Add screen shots or video on Open Lab

Full SceneManager.gd script

extends Node2D

# communicate between scene components

export (NodePath) var player_path
onready var player = get_node(player_path)

func _on_player_hit():
	print('player hit!', Global.player_lives)
	if Global.player_lives > 1:
		Global.player_lives -= 1
	else:
		print('game over!')
		player.dies()


func _on_item_collected():
	Global.item_count += 1
	print("you have ", Global.item_count, " items")

Added to PlayerController

# member variables
signal player_hit

func _on_Enemy_body_entered(body):
	emit_signal("player_hit")

func dies():
	is_alive = false
	$AnimatedSprite.play('Dies')

ItemManager.gd

extends Area2D

signal item_collected


func _on_Item_body_entered(body):
	emit_signal("item_collected")