Add Pong demo

And make it the main scene.

The paddles have 2 custom blocks for movement, borrowing from the
SimpleCharacter example. But the speed parameter is a Vector2 so the
movement can be limited to the Y axis.

The HUD has methods to change the scoring labels. For now a BlockCode
node is added to the root node for setting arbitrary score as example.

All components have been copied from Moddable Pong and removing the
logic. The ball properties were left for now.

The project window viewport is adjusted to match Moddable Pong. Also the
gravity setting was set to zero.

Author: manuq

pong_game/ball.gd

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+@tool
+class_name Ball
+extends RigidBody2D
+
+const _INITIAL_RADIUS: int = 64
+
+## This is how fast your ball moves.
+@export_range(0.0, 10000.0, 0.5, "suffix:px/s") var initial_speed: float = 500.0
+
+## This is the initial angle of the ball.
+@export_range(-180, 180, 0.5, "radians_as_degrees") var initial_direction: float = PI / 4
+
+## How big is this ball?
+@export_range(0.1, 5.0, 0.1) var size: float = 1.0:
+	set = _set_size
+
+@onready var _shape: CollisionShape2D = %CollisionShape2D
+@onready var _sprite: Sprite2D = %Sprite2D
+
+
+func _set_size(new_size: float):
+	size = new_size
+	if not is_node_ready():
+		await ready
+	_shape.shape.radius = _INITIAL_RADIUS * size
+	_sprite.scale = Vector2(size, size)
+
+
+func _ready():
+	if Engine.is_editor_hint():
+		set_process(false)
+		set_physics_process(false)
+	reset()
+
+
+func reset():
+	linear_velocity = Vector2.from_angle(initial_direction) * initial_speed
+	angular_velocity = 0.0
+	_set_size(size)

pong_game/ball.png

@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://bcgr5amsq3jfl"
+path="res://.godot/imported/ball.png-207b87d36613f4458c4a15d56cdcf75a.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://pong_game/ball.png"
+dest_files=["res://.godot/imported/ball.png-207b87d36613f4458c4a15d56cdcf75a.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

pong_game/ball.png.import

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+[gd_scene load_steps=7 format=3 uid="uid://c7l70grmkauij"]
+
+[ext_resource type="Script" path="res://pong_game/ball.gd" id="1_vdrab"]
+[ext_resource type="Texture2D" uid="uid://bcgr5amsq3jfl" path="res://pong_game/ball.png" id="2_xkrmm"]
+[ext_resource type="AudioStream" uid="uid://bc7jd3d8m5spt" path="res://pong_game/wall_hit.ogg" id="3_mjbsd"]
+[ext_resource type="AudioStream" uid="uid://jk0oapxjw354" path="res://pong_game/paddle_hit.ogg" id="4_skr8k"]
+
+[sub_resource type="PhysicsMaterial" id="PhysicsMaterial_c3m63"]
+friction = 0.0
+bounce = 1.0
+
+[sub_resource type="CircleShape2D" id="CircleShape2D_sntrn"]
+radius = 64.0
+
+[node name="Ball" type="RigidBody2D" groups=["balls"]]
+collision_layer = 2
+collision_mask = 15
+physics_material_override = SubResource("PhysicsMaterial_c3m63")
+continuous_cd = 1
+max_contacts_reported = 1
+contact_monitor = true
+linear_velocity = Vector2(353.553, 353.553)
+script = ExtResource("1_vdrab")
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="."]
+unique_name_in_owner = true
+shape = SubResource("CircleShape2D_sntrn")
+
+[node name="Sprite2D" type="Sprite2D" parent="."]
+unique_name_in_owner = true
+texture = ExtResource("2_xkrmm")
+
+[node name="WallAudioStreamPlayer" type="AudioStreamPlayer" parent="."]
+stream = ExtResource("3_mjbsd")
+
+[node name="PaddleAudioStreamPlayer" type="AudioStreamPlayer" parent="."]
+stream = ExtResource("4_skr8k")
+
+[connection signal="body_entered" from="." to="." method="_on_body_entered"]

pong_game/ball.tscn

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+extends CanvasLayer
+
+@onready var _score_labels = {
+	"left": %PlayerLeftScore,
+	"right": %PlayerRightScore,
+}
+
+
+## Sets the score for one player.
+func set_player_score(player: String, score: int):
+	var text = _score_labels[player].text
+	if str(score) != text:
+		_score_labels[player].text = str(score)
+
+
+## Sets the score for each player.
+func set_players_scores(left_score: int, right_score: int):
+	set_player_score("left", left_score)
+	set_player_score("right", right_score)

pong_game/hud.gd

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+[gd_scene load_steps=3 format=3 uid="uid://bis7afjjuwypq"]
+
+[ext_resource type="Script" path="res://pong_game/hud.gd" id="1_yyb01"]
+[ext_resource type="Texture2D" uid="uid://dijemw7iilr2m" path="res://pong_game/line.png" id="2_jon51"]
+
+[node name="HUD" type="CanvasLayer" groups=["hud"]]
+script = ExtResource("1_yyb01")
+
+[node name="Control" type="Control" parent="."]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="HBoxContainer" type="HBoxContainer" parent="Control"]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="Lines" type="Sprite2D" parent="Control/HBoxContainer"]
+unique_name_in_owner = true
+texture_repeat = 2
+position = Vector2(960, 536)
+texture = ExtResource("2_jon51")
+region_enabled = true
+region_rect = Rect2(0, 0, 20, 1100)
+
+[node name="PlayerLeftScore" type="Label" parent="Control"]
+unique_name_in_owner = true
+layout_mode = 2
+offset_left = 240.0
+offset_right = 717.0
+offset_bottom = 1080.0
+pivot_offset = Vector2(240, 176)
+size_flags_horizontal = 3
+size_flags_vertical = 1
+theme_override_font_sizes/font_size = 200
+text = "0"
+horizontal_alignment = 1
+
+[node name="PlayerRightScore" type="Label" parent="Control"]
+unique_name_in_owner = true
+layout_mode = 2
+offset_left = 1200.0
+offset_right = 1677.0
+offset_bottom = 1080.0
+pivot_offset = Vector2(240, 176)
+size_flags_horizontal = 3
+size_flags_vertical = 1
+theme_override_font_sizes/font_size = 200
+text = "0"
+horizontal_alignment = 1

pong_game/hud.tscn

@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://dijemw7iilr2m"
+path="res://.godot/imported/line.png-452af046907249a8ef12695e48447ab1.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://pong_game/line.png"
+dest_files=["res://.godot/imported/line.png-452af046907249a8ef12695e48447ab1.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1

pong_game/line.png

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+@tool
+class_name Paddle
+extends CharacterBody2D
+
+
+func get_custom_class():
+	return "Paddle"
+
+
+static func get_exposed_properties() -> Array[String]:
+	return ["position"]
+
+
+static func get_custom_blocks() -> Array[BlockCategory]:
+	var b: Block
+
+	# Movement
+	var movement_list: Array[Block] = []
+	b = CategoryFactory.BLOCKS["statement_block"].instantiate()
+	b.block_type = Types.BlockType.EXECUTE
+	b.block_format = "Move with player 1 buttons, speed {speed: VECTOR2}"
+	b.statement = 'velocity = Input.get_vector("ui_left", "ui_right", "ui_up", "ui_down")*{speed}\n' + "move_and_slide()"
+	movement_list.append(b)
+
+	b = CategoryFactory.BLOCKS["statement_block"].instantiate()
+	b.block_type = Types.BlockType.EXECUTE
+	b.block_format = "Move with player 2 buttons, speed {speed: VECTOR2}"
+	b.statement = 'velocity = Input.get_vector("player_2_left", "player_2_right", "player_2_up", "player_2_down")*{speed}\n' + "move_and_slide()"
+	movement_list.append(b)
+
+	var movement_category: BlockCategory = BlockCategory.new("Movement", movement_list, Color("4a86d5"))
+
+	return [movement_category]