Obstacles and Collisions

Add obstacles and collions in Godot using graphics from the Obstacles and Enemies lab.

1. Setting up the Godot project

• Use your game project or download the Default Project Template
• Download the Assets folder if you need any assets

2. Add collision layers and masks

• Setup default collision layers in masks in Project > Project Settings > Layer Names > 2d Physics
• You may not need all of the same layers but the default layers include:
  • Player
  • Platform
  • Item
  • ObstacleBody
  • ObstacleHit
  • ObstacleAttack
  • ObstacleDetect

3. Add a static obstacle

• The first obstacle will not be moving
• Add a sprite and collider
• Add ObstacleSimple.gd script
• Modify PlayerController.gd for hitting obstacle

4. Add a second obstacle scene

• Make something unique about this obstacle, for example it could deal more damage to the player, or disappear if the player runs into it

5. Documentation

• Post screen shots or video on Open Lab

Updates to PlayerController.gd script

func obstacle_collision():
	is_alive = false # player movement suspended before determining state
	$AnimatedSprite.play('Hit')


# after hit animation, test if player is still alive
func _on_AnimatedSprite_animation_finished():
	if $AnimatedSprite.animation == 'Hit':
		is_alive = true
		emit_signal("player_hit", is_alive) # don't know if player should die yet

Updates to SceneManager.gd script

func _on_player_hit(is_alive):
	
	if is_alive and Global.player_lives > 0:
		Global.player_lives = Global.player_lives - 1
		
	if not is_alive or Global.player_lives <= 0:
		player.dies()

Full ObstacleSimple.gd script

extends Area2D

# choose frame from sprite sheet
export var frame_number = 0 

func _ready():
	$Sprite.frame = frame_number

func _on_Obstacle_body_entered(body):
	body.enemy_collision() # call enemy collision func in player
	$HitSound.play()