Game #3: Space Shooter

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

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+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

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+[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

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+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 )