Game #3: Space Shooter

space-shooter/Scenes/EnemySpawner.gd

@@ -0,0 +1,21 @@
+extends Node2D
+
+const Enemy = preload("res://Scenes/Objects/Enemy.tscn")
+onready var spawnPoints = $SpawnPoints
+
+
+func get_random_spawnpoint():
+	var points = spawnPoints.get_children()
+	points.shuffle()
+	return points[0].global_position
+
+	
+func spawn_enemy():
+	var spawn_location = get_random_spawnpoint()
+	var enemy = Enemy.instance()
+	enemy.global_position = spawn_location
+	get_tree().current_scene.add_child(enemy)
+
+
+func _on_Timer_timeout():
+	spawn_enemy()

space-shooter/Scenes/EnemySpawner.tscn

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+[gd_scene load_steps=2 format=2]
+
+[ext_resource path="res://Scenes/EnemySpawner.gd" type="Script" id=1]
+
+
+[node name="EnemySpawner" type="Node2D"]
+script = ExtResource( 1 )
+
+[node name="SpawnPoints" type="Node2D" parent="."]
+
+[node name="Position2D" type="Position2D" parent="SpawnPoints"]
+position = Vector2( 0, 20 )
+
+[node name="Position2D2" type="Position2D" parent="SpawnPoints"]
+position = Vector2( 0, 40 )
+
+[node name="Position2D3" type="Position2D" parent="SpawnPoints"]
+position = Vector2( 0, 60 )
+
+[node name="Position2D4" type="Position2D" parent="SpawnPoints"]
+position = Vector2( 0, 80 )
+
+[node name="Position2D5" type="Position2D" parent="SpawnPoints"]
+position = Vector2( 0, 100 )
+
+[node name="Position2D6" type="Position2D" parent="SpawnPoints"]
+position = Vector2( 0, 120 )
+
+[node name="Position2D7" type="Position2D" parent="SpawnPoints"]
+position = Vector2( 0, 140 )
+
+[node name="Position2D8" type="Position2D" parent="SpawnPoints"]
+position = Vector2( 0, 160 )
+
+[node name="Timer" type="Timer" parent="."]
+wait_time = 2.0
+autostart = true
+[connection signal="timeout" from="Timer" to="." method="_on_Timer_timeout"]

space-shooter/Scenes/ExplosionEffect.tscn

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+[gd_scene load_steps=4 format=2]
+
+[ext_resource path="res://Sprites/Explosion.png" type="Texture" id=1]
+[ext_resource path="res://SFX/Explode.wav" type="AudioStream" id=2]
+
+[sub_resource type="Animation" id=1]
+resource_name = "Explosion"
+length = 0.5
+tracks/0/type = "value"
+tracks/0/path = NodePath(".:frame")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/keys = {
+"times": PoolRealArray( 0, 0.1, 0.2, 0.3, 0.4 ),
+"transitions": PoolRealArray( 1, 1, 1, 1, 1 ),
+"update": 1,
+"values": [ 0, 1, 2, 3, 4 ]
+}
+tracks/1/type = "method"
+tracks/1/path = NodePath(".")
+tracks/1/interp = 1
+tracks/1/loop_wrap = true
+tracks/1/imported = false
+tracks/1/enabled = true
+tracks/1/keys = {
+"times": PoolRealArray( 0.5 ),
+"transitions": PoolRealArray( 1 ),
+"values": [ {
+"args": [  ],
+"method": "queue_free"
+} ]
+}
+
+[node name="ExplosionEffect" type="Sprite"]
+texture = ExtResource( 1 )
+hframes = 6
+
+[node name="AnimationPlayer" type="AnimationPlayer" parent="."]
+autoplay = "Explosion"
+anims/Explosion = SubResource( 1 )
+
+[node name="ExplosionSound" type="AudioStreamPlayer" parent="."]
+stream = ExtResource( 2 )
+autoplay = true

space-shooter/Scenes/LaserHit.gd

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+extends Node2D
+
+
+func _on_Timer_timeout():
+	queue_free()

space-shooter/Scenes/LaserHit.tscn

@@ -0,0 +1,37 @@
+[gd_scene load_steps=4 format=2]
+
+[ext_resource path="res://Scenes/LaserHit.gd" type="Script" id=1]
+[ext_resource path="res://SFX/Hit.wav" type="AudioStream" id=2]
+
+[sub_resource type="ParticlesMaterial" id=1]
+lifetime_randomness = 1.0
+emission_shape = 1
+emission_sphere_radius = 1.0
+flag_disable_z = true
+spread = 180.0
+gravity = Vector3( 0, 0, 0 )
+initial_velocity = 25.0
+initial_velocity_random = 1.0
+orbit_velocity = 0.0
+orbit_velocity_random = 0.0
+scale = 1.5
+
+[node name="LaserHit" type="Node2D"]
+script = ExtResource( 1 )
+
+[node name="Timer" type="Timer" parent="."]
+wait_time = 3.0
+one_shot = true
+autostart = true
+
+[node name="HitParticles" type="Particles2D" parent="."]
+emitting = false
+one_shot = true
+explosiveness = 1.0
+randomness = 1.0
+process_material = SubResource( 1 )
+
+[node name="HitSound" type="AudioStreamPlayer" parent="."]
+stream = ExtResource( 2 )
+autoplay = true
+[connection signal="timeout" from="Timer" to="." method="_on_Timer_timeout"]

space-shooter/Scenes/Music.tscn

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+[gd_scene load_steps=2 format=2]
+
+[ext_resource path="res://Music/Music.ogg" type="AudioStream" id=1]
+
+
+[node name="Music" type="AudioStreamPlayer"]
+stream = ExtResource( 1 )
+volume_db = -2.0
+autoplay = true

space-shooter/Scenes/Objects/Bullet.gd

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+extends RigidBody2D
+
+
+const LaserHit = preload("res://Scenes/LaserHit.tscn")
+
+onready var laserSound = $LaserSound
+
+func _ready():
+	laserSound.play()
+
+func _on_VisibilityNotifier2D_screen_exited():
+	queue_free()
+
+func create_hit_effect():
+	var hit = LaserHit.instance()
+	hit.global_position = global_position
+	hit.get_node("HitParticles").emitting = true
+	get_tree().current_scene.add_child(hit)

space-shooter/Scenes/Objects/Bullet.tscn

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+[gd_scene load_steps=5 format=2]
+
+[ext_resource path="res://Scenes/Objects/Bullet.gd" type="Script" id=1]
+[ext_resource path="res://Sprites/Bullet.png" type="Texture" id=2]
+[ext_resource path="res://SFX/Laser.wav" type="AudioStream" id=3]
+
+[sub_resource type="RectangleShape2D" id=1]
+extents = Vector2( 4.07371, 3.0471 )
+
+[node name="Bullet" type="RigidBody2D"]
+gravity_scale = 0.0
+linear_velocity = Vector2( 200, 0 )
+linear_damp = 0.0
+script = ExtResource( 1 )
+
+[node name="Sprite" type="Sprite" parent="."]
+texture = ExtResource( 2 )
+
+[node name="Collisiion" type="CollisionShape2D" parent="."]
+shape = SubResource( 1 )
+
+[node name="VisibilityNotifier2D" type="VisibilityNotifier2D" parent="."]
+position = Vector2( 0.471259, 0.0496063 )
+scale = Vector2( 0.456811, 0.394803 )
+
+[node name="LaserSound" type="AudioStreamPlayer" parent="."]
+stream = ExtResource( 3 )
+autoplay = true
+[connection signal="body_entered" from="." to="." method="_on_Bullet_body_entered"]
+[connection signal="screen_exited" from="VisibilityNotifier2D" to="." method="_on_VisibilityNotifier2D_screen_exited"]

space-shooter/Scenes/Objects/Enemy.gd

@@ -0,0 +1,30 @@
+extends Area2D
+
+const Explosion = preload("res://Scenes/ExplosionEffect.tscn")
+
+export (int) var speed = 50
+export (int) var armor = 3
+
+func _process(delta):
+	position.x -= speed * delta
+
+func _on_Enemy_body_entered(body):
+	body.create_hit_effect()
+	body.queue_free()
+	armor -= 1
+	
+	if armor <= 0:
+		var root = get_tree().current_scene
+		if root.is_in_group("World"):
+			root.score += 10
+		explode()
+		queue_free()
+
+func _on_VisibilityNotifier2D_screen_exited():
+	queue_free()
+
+
+func explode():
+	var explosion = Explosion.instance()
+	explosion.global_position = global_position
+	get_tree().current_scene.add_child(explosion)

space-shooter/Scenes/Objects/Enemy.tscn

@@ -0,0 +1,19 @@
+[gd_scene load_steps=3 format=2]
+
+[ext_resource path="res://Scenes/Objects/Enemy.gd" type="Script" id=1]
+[ext_resource path="res://Sprites/Enemy.png" type="Texture" id=2]
+
+[node name="Enemy" type="Area2D"]
+script = ExtResource( 1 )
+
+[node name="Sprite" type="Sprite" parent="."]
+texture = ExtResource( 2 )
+
+[node name="Collision" type="CollisionPolygon2D" parent="."]
+polygon = PoolVector2Array( -3, -7, -1, -7, -1, -5, 0, -5, 0, -6, 1, -6, 1, -7, 3, -7, 3, -6, 4, -6, 4, -5, 5, -5, 5, 5, 4, 5, 4, 6, 3, 6, 3, 7, 1, 7, 1, 6, 0, 6, 0, 5, -1, 5, -1, 7, -3, 7, -3, 6, -4, 6, -4, 5, -2, 5, -2, 3, -3, 3, -3, 2, -5, 2, -5, 1, -4, 1, -4, -1, -5, -1, -5, -2, -3, -2, -3, -3, -2, -3, -2, -5, -4, -5, -4, -6, -3, -6 )
+
+[node name="VisibilityNotifier2D" type="VisibilityNotifier2D" parent="."]
+position = Vector2( 0, 4.17233e-07 )
+scale = Vector2( 0.6, 0.8 )
+[connection signal="body_entered" from="." to="." method="_on_Enemy_body_entered"]
+[connection signal="screen_exited" from="VisibilityNotifier2D" to="." method="_on_VisibilityNotifier2D_screen_exited"]

space-shooter/Scenes/Objects/Ship.gd

@@ -0,0 +1,39 @@
+extends Area2D
+
+const Bullet = preload("res://Scenes/Objects/Bullet.tscn")
+const Explosion = preload("res://Scenes/ExplosionEffect.tscn")
+
+export (int) var speed = 100
+
+signal player_death
+
+func _process(delta):
+	if Input.is_action_pressed("ui_up"):
+		position.y -= speed * delta
+		
+	if Input.is_action_pressed("ui_down"):
+		position.y += speed * delta
+		
+	if Input.is_action_just_pressed("ui_select"):
+		fire_bullet()
+
+
+func fire_bullet():
+	var bullet = Bullet.instance()
+	var root = get_tree().current_scene # World scene root node
+	
+	bullet.global_position = global_position
+	
+	root.add_child_below_node(root.get_node("Background"), bullet)
+
+
+func _on_Ship_area_entered(area):
+	queue_free()
+	area.queue_free()
+
+
+func _exit_tree():
+	var explosion = Explosion.instance()
+	explosion.global_position = global_position
+	get_tree().current_scene.call_deferred("add_child", explosion)
+	emit_signal("player_death")

space-shooter/Scenes/Objects/Ship.tscn

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+[gd_scene load_steps=3 format=2]
+
+[ext_resource path="res://Sprites/Ship.png" type="Texture" id=1]
+[ext_resource path="res://Scenes/Objects/Ship.gd" type="Script" id=2]
+
+
+[node name="Ship" type="Area2D"]
+script = ExtResource( 2 )
+
+[node name="Sprite" type="Sprite" parent="."]
+texture = ExtResource( 1 )
+
+[node name="Collision" type="CollisionPolygon2D" parent="."]
+polygon = PoolVector2Array( -7, -4, -5, -4, -5, -3, -4, -3, -4, -7, -2, -7, -2, -6, -1, -6, -1, -5, 0, -5, 0, -4, 1, -4, 1, -3, 2, -3, 2, -2, 5, -2, 5, -1, 7, -1, 7, 1, 5, 1, 5, 2, 2, 2, 2, 3, 1, 3, 1, 4, 0, 4, 0, 5, -1, 5, -1, 6, -2, 6, -2, 7, -4, 7, -4, 3, -5, 3, -5, 4, -7, 4, -7, 2, -6, 2, -6, 1, -7, 1, -7, -1, -6, -1, -6, -2, -7, -2 )
+[connection signal="area_entered" from="." to="." method="_on_Ship_area_entered"]

space-shooter/Scenes/Objects/Stars.tscn

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+[gd_scene load_steps=2 format=2]
+
+[sub_resource type="ParticlesMaterial" id=1]
+emission_shape = 2
+emission_box_extents = Vector3( 1, 90, 1 )
+flag_disable_z = true
+spread = 0.0
+gravity = Vector3( 0, 0, 0 )
+initial_velocity = -100.0
+initial_velocity_random = 0.5
+orbit_velocity = 0.0
+orbit_velocity_random = 0.0
+
+[node name="Stars" type="Particles2D"]
+position = Vector2( 320, 90 )
+amount = 120
+lifetime = 10.0
+preprocess = 10.0
+process_material = SubResource( 1 )

space-shooter/Scenes/SaveLoad.gd

@@ -0,0 +1,28 @@
+extends Node
+
+# Use user://save.json to automatically use user app config folders
+# Leaving as res to avoid storing json files for test games
+const SAVE_DATA_PATH = "res://save.json"
+
+var default_save_data = {
+	"hi_score": 0
+}
+
+func store_save_data(data):
+	var save_file = File.new()
+	save_file.open(SAVE_DATA_PATH, File.WRITE)
+	save_file.store_line(to_json(data))
+	save_file.close()
+
+func load_save_data():
+	var save_file = File.new()
+	
+	if not save_file.file_exists(SAVE_DATA_PATH):
+		store_save_data(default_save_data)
+		return default_save_data
+
+	save_file.open(SAVE_DATA_PATH, File.READ)
+	var save_data = parse_json(save_file.get_as_text())
+	save_file.close()
+
+	return save_data

space-shooter/Scenes/Stages/GameOver.gd

@@ -0,0 +1,10 @@
+extends Node
+
+func _ready():
+	var save_data = SaveLoad.load_save_data()
+	$HiScore.text = "Hi-Score: " + str(save_data.hi_score)
+
+func _process(_delta):
+	if Input.is_action_just_pressed("ui_cancel"):
+		# warning-ignore:return_value_discarded
+		get_tree().change_scene("res://Scenes/Stages/MainMenu.tscn")

space-shooter/Scenes/Stages/GameOver.tscn

@@ -0,0 +1,60 @@
+[gd_scene load_steps=4 format=2]
+
+[ext_resource path="res://Fonts/PixelFont.tres" type="DynamicFont" id=1]
+[ext_resource path="res://Scenes/Objects/Stars.tscn" type="PackedScene" id=2]
+[ext_resource path="res://Scenes/Stages/GameOver.gd" type="Script" id=3]
+
+
+
+
+[node name="GameOver" type="Node"]
+script = ExtResource( 3 )
+
+[node name="ColorRect" type="ColorRect" parent="."]
+anchor_right = 1.0
+anchor_bottom = 1.0
+color = Color( 0, 0, 0, 1 )
+__meta__ = {
+"_edit_lock_": true,
+"_edit_use_anchors_": false
+}
+
+[node name="Stars" parent="." instance=ExtResource( 2 )]
+
+[node name="GameOver" type="Label" parent="."]
+margin_top = 60.0
+margin_right = 320.0
+margin_bottom = 80.0
+custom_fonts/font = ExtResource( 1 )
+text = "GAME OVER"
+align = 1
+valign = 1
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="HiScore" type="Label" parent="."]
+anchor_top = 1.0
+anchor_right = 1.0
+anchor_bottom = 1.0
+margin_top = -100.0
+margin_bottom = -80.0
+custom_fonts/font = ExtResource( 1 )
+text = "Hi-Score = 0"
+align = 1
+valign = 1
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="Info" type="Label" parent="."]
+margin_top = 100.0
+margin_right = 320.0
+margin_bottom = 120.0
+custom_fonts/font = ExtResource( 1 )
+text = "Press ESC to go back to the Main Menu"
+align = 1
+valign = 1
+__meta__ = {
+"_edit_use_anchors_": false
+}

space-shooter/Scenes/Stages/MainMenu.gd

@@ -0,0 +1,10 @@
+extends Node
+
+
+func _process(_delta):
+	if Input.is_action_just_pressed("ui_select"):
+		# warning-ignore:return_value_discarded
+		get_tree().change_scene("res://Scenes/Stages/World.tscn")
+	
+	if Input.is_action_just_pressed("ui_cancel"):
+		get_tree().quit()

space-shooter/Scenes/Stages/MainMenu.tscn

@@ -0,0 +1,40 @@
+[gd_scene load_steps=4 format=2]
+
+[ext_resource path="res://Fonts/PixelFont.tres" type="DynamicFont" id=1]
+[ext_resource path="res://Scenes/Objects/Stars.tscn" type="PackedScene" id=2]
+[ext_resource path="res://Scenes/Stages/MainMenu.gd" type="Script" id=3]
+
+
+
+
+[node name="MainMenu" type="Node"]
+script = ExtResource( 3 )
+
+[node name="Background" type="ColorRect" parent="."]
+anchor_right = 1.0
+anchor_bottom = 1.0
+color = Color( 0, 0, 0, 1 )
+__meta__ = {
+"_edit_lock_": true,
+"_edit_use_anchors_": false
+}
+
+[node name="CenterContainer" type="CenterContainer" parent="."]
+anchor_right = 1.0
+anchor_bottom = 1.0
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="Label" type="Label" parent="CenterContainer"]
+margin_left = 121.0
+margin_top = 82.0
+margin_right = 199.0
+margin_bottom = 97.0
+custom_fonts/font = ExtResource( 1 )
+text = "Press Space to Start
+Press ESC to exit"
+align = 1
+
+[node name="Stars" parent="." instance=ExtResource( 2 )]
+position = Vector2( 320, 80 )

space-shooter/Scenes/Stages/World.gd

@@ -0,0 +1,25 @@
+extends Node
+
+var score = 0 setget set_score
+onready var scoreLabel = $Score
+
+
+func set_score(value):
+	score = value
+	update_score(str(value))
+
+func update_score(value):
+	scoreLabel.text = "Score = " + value
+
+func update_save_data():
+	var save_data = SaveLoad.load_save_data()
+	if score > save_data.hi_score:
+		save_data.hi_score = score
+		SaveLoad.store_save_data(save_data)
+
+func _on_Ship_player_death():
+	update_save_data()
+	# Yield until the timer expires
+	yield(get_tree().create_timer(1), "timeout")
+	# warning-ignore:return_value_discarded
+	get_tree().change_scene("res://Scenes/Stages/GameOver.tscn")

space-shooter/Scenes/Stages/World.tscn

@@ -0,0 +1,42 @@
+[gd_scene load_steps=6 format=2]
+
+[ext_resource path="res://Scenes/Objects/Ship.tscn" type="PackedScene" id=1]
+[ext_resource path="res://Scenes/Stages/World.gd" type="Script" id=2]
+[ext_resource path="res://Scenes/EnemySpawner.tscn" type="PackedScene" id=3]
+[ext_resource path="res://Fonts/PixelFont.tres" type="DynamicFont" id=4]
+[ext_resource path="res://Scenes/Objects/Stars.tscn" type="PackedScene" id=5]
+
+[node name="World" type="Node" groups=[
+"World",
+]]
+script = ExtResource( 2 )
+
+[node name="Background" type="ColorRect" parent="."]
+anchor_right = 1.0
+anchor_bottom = 1.0
+color = Color( 0, 0, 0, 1 )
+__meta__ = {
+"_edit_lock_": true,
+"_edit_use_anchors_": false
+}
+
+[node name="Stars" parent="." instance=ExtResource( 5 )]
+
+[node name="EnemySpawner" parent="." instance=ExtResource( 3 )]
+position = Vector2( 336, 0 )
+
+[node name="Ship" parent="." instance=ExtResource( 1 )]
+position = Vector2( 32, 90 )
+
+[node name="Score" type="Label" parent="."]
+margin_right = 320.0
+margin_bottom = 14.0
+custom_fonts/font = ExtResource( 4 )
+text = "Score = 0"
+align = 1
+valign = 1
+__meta__ = {
+"_edit_lock_": true,
+"_edit_use_anchors_": false
+}
+[connection signal="player_death" from="Ship" to="." method="_on_Ship_player_death"]