first work

scenes/playground/Playground.gd

@@ -0,0 +1,47 @@
+extends Node2D
+
+var Ball = preload("res://scenes/playground/ball/Ball.tscn")
+
+var left_point = 0
+var right_point = 0
+
+func start():
+	var ball = Ball.instantiate()
+	add_child(ball)
+
+func set_score():
+	get_node("Score").text = "{right} - {left}".format({
+		"left": left_point,
+		"right": right_point
+	})
+
+func new_round(ball):
+	remove_child(ball)
+	set_score()
+	start()
+
+func _ready():
+	start()
+
+func _process(delta):
+	pass
+
+func _on_goal_area_left_body_entered(body):
+	if body.name == "Ball":	
+		left_point += 1
+		new_round(body)
+
+func _on_goal_area_right_body_entered(body):
+	if body.name == "Ball":
+		right_point += 1
+		new_round(body)
+
+
+func _on_racket_left_body_entered(body):
+	if body.name == "Ball":
+		body.linear_velocity = body.linear_velocity * -1
+
+
+func _on_racket_right_body_entered(body):
+	if body.name == "Ball":
+		body.linear_velocity = body.linear_velocity * -1

scenes/playground/Playground.tscn

@@ -0,0 +1,66 @@
+[gd_scene load_steps=6 format=3 uid="uid://catrpx1vuhvou"]
+
+[ext_resource type="Script" path="res://scenes/playground/Playground.gd" id="1_86x6h"]
+[ext_resource type="PackedScene" uid="uid://ce4mnfokb6pkn" path="res://scenes/playground/racket/Racket.tscn" id="1_ywul3"]
+
+[sub_resource type="PhysicsMaterial" id="PhysicsMaterial_v2vae"]
+friction = 0.0
+bounce = 1.0
+
+[sub_resource type="RectangleShape2D" id="RectangleShape2D_u7af8"]
+size = Vector2(100, 600)
+
+[sub_resource type="LabelSettings" id="LabelSettings_ildlg"]
+font_size = 64
+
+[node name="Playground" type="Node2D"]
+script = ExtResource("1_86x6h")
+
+[node name="Wall" type="StaticBody2D" parent="."]
+disable_mode = 1
+physics_material_override = SubResource("PhysicsMaterial_v2vae")
+
+[node name="CollisionPolygon2D" type="CollisionPolygon2D" parent="Wall"]
+polygon = PackedVector2Array(0, 8, 0, 600, 1200, 600, 1200, 8, 0, 0, 0, 8, 1192, 16, 1192, 16, 1192, 592, 8, 592, 8, 16)
+one_way_collision_margin = 0.0
+
+[node name="GoalAreaLeft" type="Area2D" parent="."]
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="GoalAreaLeft"]
+position = Vector2(50, 300)
+shape = SubResource("RectangleShape2D_u7af8")
+
+[node name="GoalAreaRight" type="Area2D" parent="."]
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="GoalAreaRight"]
+position = Vector2(1150, 300)
+shape = SubResource("RectangleShape2D_u7af8")
+
+[node name="RacketLeft" parent="." instance=ExtResource("1_ywul3")]
+position = Vector2(128, 224)
+collision_layer = 255
+collision_mask = 255
+max_contacts_reported = 1000
+contact_monitor = true
+metadata/UP_KEY = "left_up"
+metadata/DOWN_KEY = "left_down"
+
+[node name="RacketRight" parent="." instance=ExtResource("1_ywul3")]
+position = Vector2(1032, 224)
+metadata/UP_KEY = "right_up"
+metadata/DOWN_KEY = "right_down"
+
+[node name="Score" type="Label" parent="."]
+offset_left = 544.0
+offset_top = 32.0
+offset_right = 673.0
+offset_bottom = 120.0
+text = "0 - 0"
+label_settings = SubResource("LabelSettings_ildlg")
+horizontal_alignment = 1
+vertical_alignment = 1
+
+[connection signal="body_entered" from="GoalAreaLeft" to="." method="_on_goal_area_left_body_entered"]
+[connection signal="body_entered" from="GoalAreaRight" to="." method="_on_goal_area_right_body_entered"]
+[connection signal="body_entered" from="RacketLeft" to="." method="_on_racket_left_body_entered"]
+[connection signal="body_entered" from="RacketRight" to="." method="_on_racket_right_body_entered"]

scenes/playground/ball/Ball.gd

@@ -0,0 +1,21 @@
+extends RigidBody2D
+
+
+const SPEED = 300.00
+
+
+func _ready():
+	randomize()
+
+	global_position = Vector2(640, 360)
+
+	var x_direction = pow(-1, randi() % 2)
+	var y_direction = pow(-1, randi() % 2)
+
+	await get_tree().create_timer(1.0).timeout
+	
+	linear_velocity = Vector2(x_direction, y_direction) * SPEED
+
+func _process(delta):
+	pass
+

scenes/playground/ball/Ball.tscn

@@ -0,0 +1,27 @@
+[gd_scene load_steps=4 format=3 uid="uid://dmsd30hc2ob1w"]
+
+[ext_resource type="Script" path="res://scenes/playground/ball/Ball.gd" id="1_vsr7q"]
+
+[sub_resource type="PhysicsMaterial" id="PhysicsMaterial_h7mi1"]
+friction = 0.0
+
+[sub_resource type="RectangleShape2D" id="RectangleShape2D_bdxrg"]
+size = Vector2(32, 32)
+
+[node name="Ball" type="RigidBody2D"]
+mass = 0.01
+physics_material_override = SubResource("PhysicsMaterial_h7mi1")
+gravity_scale = 1.66533e-16
+can_sleep = false
+lock_rotation = true
+freeze_mode = 1
+linear_damp_mode = 1
+script = ExtResource("1_vsr7q")
+
+[node name="ColorRect" type="ColorRect" parent="."]
+offset_right = 40.0
+offset_bottom = 40.0
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+position = Vector2(20, 20)
+shape = SubResource("RectangleShape2D_bdxrg")

scenes/playground/racket/Racket.gd

@@ -0,0 +1,14 @@
+extends RigidBody2D
+
+
+const SPEED = 300.0
+
+func _ready():
+	contact_monitor = true
+
+func _physics_process(delta):
+	if Input.is_action_pressed(get_meta("UP_KEY")):
+		move_and_collide(Vector2.UP * SPEED * delta)
+	
+	if Input.is_action_pressed(get_meta("DOWN_KEY")):
+		move_and_collide(Vector2.DOWN * SPEED * delta)

scenes/playground/racket/Racket.tscn

@@ -0,0 +1,25 @@
+[gd_scene load_steps=4 format=3 uid="uid://ce4mnfokb6pkn"]
+
+[ext_resource type="Script" path="res://scenes/playground/racket/Racket.gd" id="1_gclos"]
+
+[sub_resource type="PhysicsMaterial" id="PhysicsMaterial_lq6ot"]
+friction = 0.0
+
+[sub_resource type="RectangleShape2D" id="RectangleShape2D_ehve4"]
+size = Vector2(40, 144)
+
+[node name="Racket" type="RigidBody2D"]
+physics_material_override = SubResource("PhysicsMaterial_lq6ot")
+gravity_scale = 1.66533e-16
+can_sleep = false
+lock_rotation = true
+script = ExtResource("1_gclos")
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+position = Vector2(20, 72)
+shape = SubResource("RectangleShape2D_ehve4")
+
+[node name="ColorRect" type="ColorRect" parent="."]
+offset_right = 40.0
+offset_bottom = 144.0
+color = Color(0.0117647, 0.0117647, 0.0117647, 1)