✨ Health and AreaDamage components, death and respawn logic

characters/player/player.gd

@@ -1,4 +1,5 @@
 extends RigidBody3D
+class_name Player
 
 # constants
 const max_energy : float = 100.0
@@ -28,7 +29,9 @@ var gravity : Vector3 =  g * ProjectSettings.get_setting("physics/3d/default_gra
 @onready var shape_cast = $ShapeCast3D
 @onready var weapon = $SpringArm3D/Inventory/SpaceGun
 
-# signals
+@onready var spring_arm_height = $SpringArm3D.position.y
+
+signal died(player)
 signal energy_changed(energy)
 
 func _ready():
@@ -96,3 +99,17 @@ func _physics_process(delta):
 
 	input.jumping = false
 
+func die():
+	$PlayerInput.disable()
+	var tween = create_tween()
+	tween.tween_property(input, "camera_rotation:y", -PI/2, 0.25)
+	tween.tween_property($SpringArm3D, "position:y", 0, 0.25)
+	tween.tween_interval(2)
+	tween.tween_callback(func(): died.emit(self))
+
+func respawn(location):
+	$SpringArm3D.position.y = spring_arm_height
+	input.camera_rotation.y = 0
+	linear_velocity = Vector3()
+	position = location
+	$PlayerInput.enable()

characters/player/player.tscn

@@ -1,9 +1,10 @@
-[gd_scene load_steps=10 format=3 uid="uid://cbhx1xme0sb7k"]
+[gd_scene load_steps=11 format=3 uid="uid://cbhx1xme0sb7k"]
 
 [ext_resource type="Script" path="res://characters/player/player.gd" id="1_ymjub"]
 [ext_resource type="PackedScene" uid="uid://bcv81ku26xo" path="res://interfaces/hud/hud.tscn" id="2_5qvi2"]
 [ext_resource type="PackedScene" uid="uid://c8co0qa2omjmh" path="res://weapons/space_gun/space_gun.tscn" id="2_ka38u"]
 [ext_resource type="Shape3D" uid="uid://dkwljsgaflf31" path="res://characters/player/collision_shape.res" id="2_y6kgj"]
+[ext_resource type="PackedScene" uid="uid://bof3mg7wgxrmn" path="res://components/health_component.tscn" id="5_dlsxj"]
 
 [sub_resource type="PhysicsMaterial" id="PhysicsMaterial_clur0"]
 resource_local_to_scene = true
@@ -40,22 +41,20 @@ properties/3/replication_mode = 2
 
 [sub_resource type="GDScript" id="GDScript_uy24w"]
 script/source = "extends MultiplayerSynchronizer
+class_name PlayerInput
 
 @export var jumping = false
 @export var jetting = false
 @export var skiing = false
 @export var direction = Vector2.ZERO
-@export var camera_rotation : Vector3
+@export var camera_rotation : Vector2
 @export var MOUSE_SENSITIVITY : float = 0.5
 
 var _mouse_position: Vector2
 
 func _ready():
-	var has_authority = get_multiplayer_authority() == multiplayer.get_unique_id()
-	set_process(has_authority)
-	set_process_unhandled_input(has_authority)
-	if has_authority:
-		Input.mouse_mode = Input.MOUSE_MODE_CAPTURED
+	enable()
+	Input.mouse_mode = Input.MOUSE_MODE_CAPTURED
 
 func _unhandled_input(event: InputEvent) -> void:
 	var mouse_mode = Input.get_mouse_mode()
@@ -93,6 +92,15 @@ func _update_camera(delta):
 	camera_rotation.x = wrapf(camera_rotation.x, deg_to_rad(0.0),deg_to_rad(360.0))
 	# reset mouse motion until next input event
 	_mouse_position = Vector2.ZERO
+
+func disable():
+	set_process(false)
+	set_process_unhandled_input(false)
+
+func enable():
+	var has_authority = get_multiplayer_authority() == multiplayer.get_unique_id()
+	set_process(has_authority)
+	set_process_unhandled_input(has_authority)
 "
 
 [node name="Player" type="RigidBody3D"]
@@ -132,6 +140,8 @@ near = 0.1
 [node name="SpaceGun" parent="SpringArm3D/Inventory" instance=ExtResource("2_ka38u")]
 transform = Transform3D(-1, 0, 8.74228e-08, 0, 1, 0, -8.74228e-08, 0, -1, 0.281712, -0.095, -0.353461)
 
+[node name="HealthComponent" parent="." instance=ExtResource("5_dlsxj")]
+
 [node name="ServerSynchronizer" type="MultiplayerSynchronizer" parent="."]
 replication_config = SubResource("SceneReplicationConfig_rqdp6")
 
@@ -139,3 +149,5 @@ replication_config = SubResource("SceneReplicationConfig_rqdp6")
 root_path = NodePath(".")
 replication_config = SubResource("SceneReplicationConfig_5j4ew")
 script = SubResource("GDScript_uy24w")
+
+[connection signal="health_zeroed" from="HealthComponent" to="." method="die"]

components/area_damage_component.gd

@@ -0,0 +1,4 @@
+extends Area3D
+class_name AreaDamageComponent
+
+@export var damage : int = 100

components/area_damage_component.tscn

@@ -0,0 +1,13 @@
+[gd_scene load_steps=3 format=3 uid="uid://ds1hekx1dq1bg"]
+
+[ext_resource type="Script" path="res://components/area_damage_component.gd" id="1_hn2e3"]
+
+[sub_resource type="SphereShape3D" id="SphereShape3D_080vi"]
+radius = 5.0
+
+[node name="AreaDamage" type="Area3D"]
+collision_layer = 4
+script = ExtResource("1_hn2e3")
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="."]
+shape = SubResource("SphereShape3D_080vi")

components/health_component.gd

@@ -0,0 +1,20 @@
+extends Area3D
+class_name HealthComponent
+
+@export var max_health : int = 100
+@export var health : int
+
+signal health_zeroed
+
+func _ready():
+	health = max_health
+	area_entered.connect(_on_area_entered)
+
+func damage(amount : int):
+	health -= amount
+	if health <= 0:
+		health_zeroed.emit()
+
+func _on_area_entered(area):
+	if area is AreaDamageComponent:
+		damage(area.damage)

components/health_component.tscn

@@ -0,0 +1,12 @@
+[gd_scene load_steps=3 format=3 uid="uid://bof3mg7wgxrmn"]
+
+[ext_resource type="Script" path="res://components/health_component.gd" id="1_00xis"]
+[ext_resource type="Shape3D" uid="uid://dkwljsgaflf31" path="res://characters/player/collision_shape.res" id="2_sgbmt"]
+
+[node name="HealthComponent" type="Area3D"]
+collision_layer = 0
+collision_mask = 4
+script = ExtResource("1_00xis")
+
+[node name="CollisionShape3D" type="CollisionShape3D" parent="."]
+shape = ExtResource("2_sgbmt")

game_modes/demo.gd

@@ -0,0 +1,11 @@
+extends Node
+
+@onready var player : Player = $Player
+
+@onready var respawn_location = player.position
+
+func _ready():
+	player.died.connect(respawn_player)
+
+func respawn_player(player):
+	player.respawn(respawn_location)

game_modes/demo.tscn

@@ -1,11 +1,19 @@
-[gd_scene load_steps=3 format=3 uid="uid://boviiugcnfyrj"]
+[gd_scene load_steps=5 format=3 uid="uid://boviiugcnfyrj"]
 
+[ext_resource type="Script" path="res://game_modes/demo.gd" id="1_gytim"]
 [ext_resource type="PackedScene" uid="uid://chbno00ugl6te" path="res://maps/genesis/genesis.tscn" id="2_lsep7"]
 [ext_resource type="PackedScene" uid="uid://cbhx1xme0sb7k" path="res://characters/player/player.tscn" id="3_j1li7"]
 
+[sub_resource type="PhysicsMaterial" id="PhysicsMaterial_c5jqv"]
+resource_local_to_scene = true
+bounce = 1.0
+absorbent = true
+
 [node name="Demo" type="Node"]
+script = ExtResource("1_gytim")
 
 [node name="Map" parent="." instance=ExtResource("2_lsep7")]
 
 [node name="Player" parent="." instance=ExtResource("3_j1li7")]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 92.7007, 0)
+physics_material_override = SubResource("PhysicsMaterial_c5jqv")

game_modes/multiplayer.tscn

@@ -29,13 +29,17 @@ func join_server(peer):
 func load_map(scene : PackedScene):
 	map.add_child(scene.instantiate())
 
+func respawn_player(player):
+	player.respawn(Vector3(0.0, 150.0, 0.0))
+
 func add_player(peer_id : int):
 	var node_name = str(peer_id)
-	var player_scene_instance = PLAYER.instantiate()
+	var player_scene_instance : Player = PLAYER.instantiate()
 	player_scene_instance.name = node_name
 	player_scene_instance.player_id = peer_id
 	player_scene_instance.position = Vector3(0.0, 150.0, 0.0)
 	players.add_child(player_scene_instance)
+	player_scene_instance.died.connect(respawn_player)
 	print(\"Peer `%s` connected\" % node_name)
 
 func remove_player(peer_id : int):

project.godot

@@ -76,6 +76,10 @@ fire_primary={
 ]
 }
 
+[layer_names]
+
+3d_physics/layer_3="Damage"
+
 [physics]
 
 3d/physics_engine="JoltPhysics3D"

weapons/space_gun/projectile_explosion.gd

@@ -1,7 +1,7 @@
 extends Node3D
 
 @onready var fire = $Fire
-@onready var explosion_area = $Area3D
+@onready var explosion_area : AreaDamageComponent = $AreaDamageComponent
 var explosion_effect_pending : bool = false
 
 const impulse_force = 1000;
@@ -9,16 +9,16 @@ const impulse_force = 1000;
 func explode():
 	explosion_effect_pending = true
 	fire.emitting = true
-	
+
 func _physics_process(_delta):
 	if explosion_effect_pending:
 		var bodies = explosion_area.get_overlapping_bodies()
-		
+
 		for body in bodies:
 			if body is RigidBody3D:
 				var direction = (body.global_position - global_position).normalized()
 				body.apply_central_impulse(direction * impulse_force)
-		
+
 		explosion_effect_pending = false
 		await get_tree().create_timer(1.0).timeout
 		queue_free()

weapons/space_gun/projectile_explosion.tscn

@@ -1,6 +1,7 @@
 [gd_scene load_steps=6 format=3 uid="uid://8atq41j7wd55"]
 
 [ext_resource type="Script" path="res://weapons/space_gun/projectile_explosion.gd" id="1_fp5td"]
+[ext_resource type="PackedScene" uid="uid://ds1hekx1dq1bg" path="res://components/area_damage_component.tscn" id="2_reyvo"]
 
 [sub_resource type="ParticleProcessMaterial" id="ParticleProcessMaterial_3mf41"]
 spread = 180.0
@@ -16,9 +17,6 @@ emission_energy_multiplier = 4.0
 [sub_resource type="SphereMesh" id="SphereMesh_k3pnh"]
 material = SubResource("StandardMaterial3D_wpu51")
 
-[sub_resource type="SphereShape3D" id="SphereShape3D_ou8x6"]
-radius = 5.0
-
 [node name="ProjectileExplosion" type="Node3D"]
 script = ExtResource("1_fp5td")
 
@@ -32,8 +30,4 @@ fixed_fps = 60
 process_material = SubResource("ParticleProcessMaterial_3mf41")
 draw_pass_1 = SubResource("SphereMesh_k3pnh")
 
-[node name="Area3D" type="Area3D" parent="."]
-input_ray_pickable = false
-
-[node name="CollisionShape3D" type="CollisionShape3D" parent="Area3D"]
-shape = SubResource("SphereShape3D_ou8x6")
+[node name="AreaDamageComponent" parent="." instance=ExtResource("2_reyvo")]