feat: Player

2026-10-07 15:46:51 +02:00
parent 074eb51084
commit d21f0c9b6c
45 changed files with 1801 additions and 74 deletions
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--- a/Assets/_Content/Scenes/SampleScene.unity
+++ b/Assets/_Content/Scenes/SampleScene.unity
--- a/Assets/_Content/Scripts/CameraFollower.cs
+++ b/Assets/_Content/Scripts/CameraFollower.cs
@@ -1,13 +0,0 @@
-using UnityEngine;
-
-[ExecuteAlways]
-public class CameraFollower : MonoBehaviour
-{
-    public GameObject Player;
-
-    void Update()
-    {
-        if (Player)
-            transform.position = Player.transform.position;
-    }
-}
--- a/Assets/_Content/Scripts/CameraFollower.cs.meta
+++ b/Assets/_Content/Scripts/CameraFollower.cs.meta
@@ -1,2 +0,0 @@
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--- a/Assets/_Content/Scripts/Characters.meta
+++ b/Assets/_Content/Scripts/Characters.meta
@@ -0,0 +1,8 @@
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--- a/Assets/_Content/Scripts/Characters/Player.cs
+++ b/Assets/_Content/Scripts/Characters/Player.cs
@@ -0,0 +1,276 @@
+using System;
+using UnityEngine;
+using UnityEngine.InputSystem;
+using Arena.Combat;
+
+namespace Arena.Characters
+{
+	public class Player : MonoBehaviour, IDamageable
+	{
+		[System.Serializable]
+		public class Settings
+		{
+			[Tooltip("Movement speed, in km/h.")]
+			[Min(0f)] public float Speed = 5f;
+		}
+
+		[System.Serializable]
+		public struct References
+		{
+			public CharacterController Controller;
+			public ProjectileLauncher Launcher;
+			public InputActionReference MoveAction;
+			public InputActionReference LookAction;
+			public InputActionReference AttackAction;
+			public InputActionReference InteractAction;
+		}
+
+		[System.Serializable]
+		public class StateContainer
+		{
+			public bool IsMoving;
+		}
+
+		#region Fields
+
+		private const float KMH_TO_MS = 1f / 3.6f;
+		private const float AIM_STICK_DEADZONE = 0.2f;
+
+		[SerializeField] private Settings _settings;
+		[SerializeField] private References _references;
+		[SerializeField] private StateContainer _state;
+		[SerializeField] private Health _health;
+
+		/// <summary>
+		/// Raised when the interact action is performed.
+		/// </summary>
+		public event Action OnInteract;
+
+		/// <summary>
+		/// The only player of the scene.
+		/// </summary>
+		public static Player Instance { get; private set; }
+		public StateContainer State => _state;
+		public Health Health => _health;
+		public ProjectileLauncher Launcher => _references.Launcher;
+
+		private Camera _camera;
+		private Vector2 _moveInput;
+		private Vector2 _aimStickInput;
+		private bool _isAimingWithStick;
+		private bool _isAttacking;
+		private bool _isInteracting;
+		private Vector3 _aimDirection = Vector3.forward;
+
+		#endregion
+
+		#region Unity Lifecycle
+
+		void Awake()
+		{
+			// Only one player can exist: a second one is removed
+			if (Instance && Instance != this)
+			{
+				Debug.LogWarning($"A second Player was found on {name}, it is destroyed.");
+				Destroy(gameObject);
+				return;
+			}
+
+			Instance = this;
+
+			// Camera.main is the camera tagged MainCamera
+			_camera = Camera.main;
+			_health.Initialize();
+		}
+
+		void OnEnable()
+		{
+			SetInputsEnabled(true);
+		}
+
+		void OnDisable()
+		{
+			SetInputsEnabled(false);
+		}
+
+		void OnDestroy()
+		{
+			if (Instance == this)
+				Instance = null;
+		}
+
+		void Update()
+		{
+			// A dead player no longer moves nor shoots
+			if (_health.IsDead)
+				return;
+
+			float deltaTime = Time.deltaTime;
+
+			GetInputs();
+			Move(deltaTime);
+			Aim();
+			Attack();
+			Interact();
+		}
+
+		#endregion
+
+		#region Public Methods
+
+		public void TakeDamage(int amount)
+		{
+			_health.TakeDamage(amount);
+		}
+
+		/// <summary>
+		/// Teleports the player.
+		/// </summary>
+		/// <param name="pose">x, y, z: position. w: angle around the vertical axis, in degrees.</param>
+		public void Teleport(Vector4 pose)
+		{
+			// An enabled CharacterController would overwrite the new position
+			_references.Controller.enabled = false;
+
+			Vector3 position = new Vector3(pose.x, pose.y, pose.z);
+			Quaternion rotation = Quaternion.Euler(0f, pose.w, 0f);
+			transform.SetPositionAndRotation(position, rotation);
+
+			_references.Controller.enabled = true;
+		}
+
+		/// <summary>
+		/// Teleports the player to the position and heading of a target, such as a spawn point.
+		/// </summary>
+		public void Teleport(Transform target)
+		{
+			Vector3 position = target.position;
+			Vector4 pose = new Vector4(position.x, position.y, position.z, target.eulerAngles.y);
+			Teleport(pose);
+		}
+
+		#endregion
+
+		#region Private Methods
+
+		private void SetInputsEnabled(bool isEnabled)
+		{
+			InputActionReference[] actions =
+			{
+				_references.MoveAction,
+				_references.LookAction,
+				_references.AttackAction,
+				_references.InteractAction
+			};
+
+			foreach (InputActionReference action in actions)
+			{
+				if (isEnabled)
+					action.action.Enable();
+				else
+					action.action.Disable();
+			}
+		}
+
+		private void GetInputs()
+		{
+			_moveInput = _references.MoveAction.action.ReadValue<Vector2>();
+			_isAttacking = _references.AttackAction.action.IsPressed();
+			_isInteracting = _references.InteractAction.action.WasPerformedThisFrame();
+
+			InputAction look = _references.LookAction.action;
+			_aimStickInput = look.ReadValue<Vector2>();
+
+			// Look is also bound to the mouse delta: only the gamepad counts as a stick
+			bool isStick = look.activeControl != null && look.activeControl.device is Gamepad;
+
+			// The last aiming device used wins: the stick when pushed, the mouse when moved
+			if (isStick && IsStickPushed())
+				_isAimingWithStick = true;
+			else if (Pointer.current != null && Pointer.current.delta.ReadValue().sqrMagnitude > 0f)
+				_isAimingWithStick = false;
+		}
+
+		private void Move(float deltaTime)
+		{
+			Vector3 direction = ToWorldDirection(_moveInput);
+			_state.IsMoving = direction.sqrMagnitude > 0f;
+
+			Vector3 velocity = direction * _settings.Speed * KMH_TO_MS;
+			_references.Controller.Move(velocity * deltaTime);
+		}
+
+		private void Aim()
+		{
+			if (_isAimingWithStick)
+			{
+				// Released stick: the player keeps its last direction
+				if (IsStickPushed())
+					_aimDirection = ToWorldDirection(_aimStickInput);
+			}
+			else if (TryGetPointerDirection(out Vector3 direction))
+			{
+				_aimDirection = direction;
+			}
+
+			transform.rotation = Quaternion.LookRotation(_aimDirection);
+		}
+
+		private void Attack()
+		{
+			if (_isAttacking)
+				_references.Launcher.TryFire();
+		}
+
+		private void Interact()
+		{
+			if (_isInteracting)
+				OnInteract?.Invoke();
+		}
+
+		private bool IsStickPushed()
+		{
+			return _aimStickInput.sqrMagnitude > AIM_STICK_DEADZONE * AIM_STICK_DEADZONE;
+		}
+
+		/// <summary>
+		/// Converts a 2D input into a world direction on the ground, relative to the camera heading.
+		/// </summary>
+		private Vector3 ToWorldDirection(Vector2 input)
+		{
+			// Only the camera rotation around the vertical axis is kept
+			Quaternion cameraHeading = Quaternion.Euler(0f, _camera.transform.eulerAngles.y, 0f);
+			return cameraHeading * new Vector3(input.x, 0f, input.y);
+		}
+
+		/// <summary>
+		/// Direction from the player to the point under the pointer, on a horizontal plane at the player's height.
+		/// </summary>
+		private bool TryGetPointerDirection(out Vector3 direction)
+		{
+			direction = Vector3.zero;
+
+			if (Pointer.current == null)
+				return false;
+
+			// Mouse position read directly: the Look action only gives its movement
+			Ray ray = _camera.ScreenPointToRay(Pointer.current.position.ReadValue());
+			Plane ground = new Plane(Vector3.up, transform.position);
+
+			if (!ground.Raycast(ray, out float distance))
+				return false;
+
+			direction = ray.GetPoint(distance) - transform.position;
+			direction.y = 0f;
+			return direction.sqrMagnitude > 0.01f;
+		}
+
+		[ContextMenu("Debug/Take 25 Damage")]
+		private void DebugTakeDamage()
+		{
+			TakeDamage(25);
+		}
+
+		#endregion
+	}
+}
--- a/Assets/_Content/Scripts/Characters/Player.cs.meta
+++ b/Assets/_Content/Scripts/Characters/Player.cs.meta
--- a/Assets/_Content/Scripts/Characters/PlayerCamera.cs
+++ b/Assets/_Content/Scripts/Characters/PlayerCamera.cs
@@ -0,0 +1,89 @@
+using UnityEngine;
+
+namespace Arena.Characters
+{
+	[ExecuteAlways]
+	public class PlayerCamera : MonoBehaviour
+	{
+		[System.Serializable]
+		public class Settings
+		{
+			[Tooltip("x: horizontal distance from the player, y: height above the player, in meters.")]
+			public Vector2 Offset = new Vector2(8f, 12f);
+
+			[Tooltip("Rotation of the offset around the player, in degrees.")]
+			public float Angle = 0f;
+
+			[Tooltip("Time to catch up with the player, in seconds. 0: no smoothing.")]
+			[Range(0f, 1f)] public float Smooth = 0.2f;
+		}
+
+		[System.Serializable]
+		public struct References
+		{
+			[Tooltip("Followed player. Found automatically when empty.")]
+			public Player Player;
+		}
+
+		#region Fields
+
+		[SerializeField] private Settings _settings;
+		[SerializeField] private References _references;
+
+		private Vector3 _velocity;
+
+		#endregion
+
+		#region Unity Lifecycle
+
+		// LateUpdate: the player has already moved this frame
+		void LateUpdate()
+		{
+			if (!GetPlayer())
+				return;
+
+			Vector3 targetPos = GetTargetPosition();
+
+			// No smoothing in edit mode: the camera snaps while the scene is edited
+			if (!Application.isPlaying || _settings.Smooth <= 0f)
+			{
+				transform.position = targetPos;
+				_velocity = Vector3.zero;
+			}
+			else
+			{
+				transform.position = Vector3.SmoothDamp(transform.position, targetPos, ref _velocity, _settings.Smooth);
+			}
+		}
+
+		#endregion
+
+		#region Private Methods
+
+		/// <summary>
+		/// Looks for the player: singleton first, then a search in the scene. Returns false if none is found.
+		/// </summary>
+		private bool GetPlayer()
+		{
+			if (_references.Player)
+				return true;
+
+			// In edit mode, Player.Awake has not run, so the singleton is empty
+			else if (Player.Instance)
+				_references.Player = Player.Instance;
+			else
+				_references.Player = FindFirstObjectByType<Player>();
+
+			return _references.Player != null;
+		}
+
+		private Vector3 GetTargetPosition()
+		{
+			Quaternion rotation = Quaternion.Euler(0f, _settings.Angle, 0f);
+			Vector3 offset = rotation * new Vector3(0f, _settings.Offset.y, -_settings.Offset.x);
+			return _references.Player.transform.position + offset;
+		}
+
+		#endregion
+	}
+}
--- a/Assets/_Content/Scripts/Characters/PlayerCamera.cs.meta
+++ b/Assets/_Content/Scripts/Characters/PlayerCamera.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: bd78e931d0126914e8206e9f6bb2b9de
--- a/Assets/_Content/Scripts/Characters/PlayerEvent.cs
+++ b/Assets/_Content/Scripts/Characters/PlayerEvent.cs
@@ -0,0 +1,96 @@
+using UnityEngine;
+using UnityEngine.Events;
+using Arena.Characters;
+
+namespace Arena.Interactions
+{
+	/// <summary>
+	/// Zone that raises OnPlayer when the player enters it, or when the player interacts inside it.
+	/// It never acts on the player itself: the actions are set up in the Inspector.
+	/// </summary>
+	[RequireComponent(typeof(Collider))]
+	public class PlayerEvent : MonoBehaviour
+	{
+		public enum Trigger
+		{
+			OnPlayerEnter,
+			OnPlayerInteract
+		}
+
+		[System.Serializable]
+		public class Settings
+		{
+			[Tooltip("OnPlayerEnter: as soon as the player enters. OnPlayerInteract: when the player interacts inside the zone.")]
+			public Trigger Trigger;
+		}
+
+		#region Fields
+
+		[SerializeField] private Settings _settings;
+
+		[Tooltip("Actions raised for the player: heal, ammo, sound, hide this object...")]
+		[SerializeField] private UnityEvent _onPlayer;
+
+		private bool _isListening;
+
+		#endregion
+
+		#region Unity Lifecycle
+
+		private void OnDisable()
+		{
+			// The object can be hidden while the player is inside
+			StopListening();
+		}
+
+		private void OnTriggerEnter(Collider other)
+		{
+			if (!IsPlayer(other))
+				return;
+
+			if (_settings.Trigger == Trigger.OnPlayerEnter)
+				_onPlayer.Invoke();
+			else
+				StartListening();
+		}
+
+		private void OnTriggerExit(Collider other)
+		{
+			if (IsPlayer(other))
+				StopListening();
+		}
+
+		#endregion
+
+		#region Private Methods
+
+		private bool IsPlayer(Collider other)
+		{
+			return Player.Instance != null && other.gameObject == Player.Instance.gameObject;
+		}
+
+		private void StartListening()
+		{
+			Player.Instance.OnInteract += HandleInteract;
+			_isListening = true;
+		}
+
+		private void StopListening()
+		{
+			if (!_isListening)
+				return;
+
+			if (Player.Instance != null)
+				Player.Instance.OnInteract -= HandleInteract;
+
+			_isListening = false;
+		}
+
+		private void HandleInteract()
+		{
+			_onPlayer.Invoke();
+		}
+
+		#endregion
+	}
+}
--- a/Assets/_Content/Scripts/Characters/PlayerEvent.cs.meta
+++ b/Assets/_Content/Scripts/Characters/PlayerEvent.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: d3c874cb9bc4c364d87e100aada2b434
--- a/Assets/_Content/Scripts/Combat.meta
+++ b/Assets/_Content/Scripts/Combat.meta
@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: d5ab3689e81574b4c8d1b37201093edf
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/Assets/_Content/Scripts/Combat/AmmoEffect.cs
+++ b/Assets/_Content/Scripts/Combat/AmmoEffect.cs
@@ -0,0 +1,34 @@
+using UnityEngine;
+using Arena.Characters;
+
+namespace Arena.Interactions
+{
+	/// <summary>
+	/// Gives ammo to the player. Apply is meant to be linked to a PlayerEvent.
+	/// </summary>
+	public class AmmoEffect : MonoBehaviour
+	{
+		[System.Serializable]
+		public class Settings
+		{
+			[Tooltip("Ammo given to the player.")]
+			[Min(1)] public int Amount = 10;
+		}
+
+		#region Fields
+
+		[SerializeField] private Settings _settings;
+
+		#endregion
+
+		#region Public Methods
+
+		public void Apply()
+		{
+			if (Player.Instance != null)
+				Player.Instance.Launcher.AddAmmo(_settings.Amount);
+		}
+
+		#endregion
+	}
+}
--- a/Assets/_Content/Scripts/Combat/AmmoEffect.cs.meta
+++ b/Assets/_Content/Scripts/Combat/AmmoEffect.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 3831749972a75dc4dbe47f8a551785fc
--- a/Assets/_Content/Scripts/Combat/HealEffect.cs
+++ b/Assets/_Content/Scripts/Combat/HealEffect.cs
@@ -0,0 +1,34 @@
+using UnityEngine;
+using Arena.Characters;
+
+namespace Arena.Interactions
+{
+	/// <summary>
+	/// Heals the player. Apply is meant to be linked to a PlayerEvent.
+	/// </summary>
+	public class HealEffect : MonoBehaviour
+	{
+		[System.Serializable]
+		public class Settings
+		{
+			[Tooltip("Hit points given to the player.")]
+			[Min(1)] public int Amount = 25;
+		}
+
+		#region Fields
+
+		[SerializeField] private Settings _settings;
+
+		#endregion
+
+		#region Public Methods
+
+		public void Apply()
+		{
+			if (Player.Instance != null)
+				Player.Instance.Health.Heal(_settings.Amount);
+		}
+
+		#endregion
+	}
+}
--- a/Assets/_Content/Scripts/Combat/HealEffect.cs.meta
+++ b/Assets/_Content/Scripts/Combat/HealEffect.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 3b9353836241da04e9bb64cc87f89745
--- a/Assets/_Content/Scripts/Combat/Health.cs
+++ b/Assets/_Content/Scripts/Combat/Health.cs
@@ -0,0 +1,83 @@
+using System;
+using UnityEngine;
+
+namespace Arena.Combat
+{
+	/// <summary>
+	/// Hit points of an entity. Serialized inside the component that owns it (Player, Enemy),
+	/// which calls Initialize in its Awake.
+	/// </summary>
+	[System.Serializable]
+	public class Health
+	{
+		#region Fields
+
+		[Tooltip("Hit points when full.")]
+		[Min(1)] public int Max = 100;
+
+		[Tooltip("Current hit points, visible for debugging.")]
+		[SerializeField] private int _current;
+
+		/// <summary>
+		/// Raised with the current and max hit points each time they change.
+		/// </summary>
+		public event Action<int, int> OnChange;
+
+		/// <summary>
+		/// Raised once, when the hit points reach zero.
+		/// </summary>
+		public event Action OnDied;
+
+		public int Current => _current;
+		public bool IsDead => _current <= 0;
+
+		#endregion
+
+		#region Public Methods
+
+		/// <summary>
+		/// Fills the hit points. Called by the owner in its Awake.
+		/// </summary>
+		public void Initialize()
+		{
+			SetCurrent(Max);
+		}
+
+		/// <summary>
+		/// Removes hit points and raises OnDied the first time they reach zero.
+		/// </summary>
+		public void TakeDamage(int amount)
+		{
+			if (IsDead || amount <= 0)
+				return;
+
+			SetCurrent(_current - amount);
+
+			if (IsDead)
+				OnDied?.Invoke();
+		}
+
+		/// <summary>
+		/// Gives hit points back without exceeding Max. Has no effect once dead.
+		/// </summary>
+		public void Heal(int amount)
+		{
+			if (IsDead || amount <= 0)
+				return;
+
+			SetCurrent(_current + amount);
+		}
+
+		#endregion
+
+		#region Private Methods
+
+		private void SetCurrent(int value)
+		{
+			_current = Mathf.Clamp(value, 0, Max);
+			OnChange?.Invoke(_current, Max);
+		}
+
+		#endregion
+	}
+}
--- a/Assets/_Content/Scripts/Combat/Health.cs.meta
+++ b/Assets/_Content/Scripts/Combat/Health.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 220d6096ae28c12449f72c38860cbc2e
--- a/Assets/_Content/Scripts/Combat/IDamageable.cs
+++ b/Assets/_Content/Scripts/Combat/IDamageable.cs
@@ -0,0 +1,10 @@
+namespace Arena.Combat
+{
+	/// <summary>
+	/// Anything that can receive damage: player, enemy, destructible object.
+	/// </summary>
+	public interface IDamageable
+	{
+		void TakeDamage(int amount);
+	}
+}
--- a/Assets/_Content/Scripts/Combat/IDamageable.cs.meta
+++ b/Assets/_Content/Scripts/Combat/IDamageable.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 14df4410feff3d044afb4ec552a18997
--- a/Assets/_Content/Scripts/Combat/Projectile.cs
+++ b/Assets/_Content/Scripts/Combat/Projectile.cs
@@ -0,0 +1,68 @@
+using UnityEngine;
+
+namespace Arena.Combat
+{
+	/// <summary>
+	/// Moves straight ahead and damages the first IDamageable it touches.
+	/// Needs a trigger collider and a kinematic Rigidbody.
+	/// </summary>
+	[RequireComponent(typeof(Rigidbody))]
+	public class Projectile : MonoBehaviour
+	{
+		[System.Serializable]
+		public class Settings
+		{
+			[Tooltip("Speed, in meters per second.")]
+			[Min(0f)] public float Speed = 20f;
+
+			[Tooltip("Time before an unused projectile is destroyed, in seconds.")]
+			[Min(0.1f)] public float Lifetime = 2f;
+		}
+
+		#region Fields
+
+		[SerializeField] private Settings _settings;
+
+		private int _damage;
+		private GameObject _owner;
+
+		#endregion
+
+		#region Unity Lifecycle
+
+		private void Update()
+		{
+			transform.position += transform.forward * _settings.Speed * Time.deltaTime;
+		}
+
+		private void OnTriggerEnter(Collider other)
+		{
+			// Ignore the shooter and the other trigger zones
+			if (other.isTrigger || other.gameObject == _owner)
+				return;
+
+			if (other.TryGetComponent(out IDamageable target))
+				target.TakeDamage(_damage);
+
+			Destroy(gameObject);
+		}
+
+		#endregion
+
+		#region Public Methods
+
+		/// <summary>
+		/// Starts the projectile. Called right after Instantiate by whoever fires it.
+		/// </summary>
+		/// <param name="damage">Damage dealt to the IDamageable it touches.</param>
+		/// <param name="owner">Shooter, ignored by the projectile.</param>
+		public void Launch(int damage, GameObject owner)
+		{
+			_damage = damage;
+			_owner = owner;
+			Destroy(gameObject, _settings.Lifetime);
+		}
+
+		#endregion
+	}
+}
--- a/Assets/_Content/Scripts/Combat/Projectile.cs.meta
+++ b/Assets/_Content/Scripts/Combat/Projectile.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 7671f358930703f4683397845e17e460
--- a/Assets/_Content/Scripts/Combat/ProjectileLauncher.cs
+++ b/Assets/_Content/Scripts/Combat/ProjectileLauncher.cs
@@ -0,0 +1,107 @@
+using System;
+using UnityEngine;
+
+namespace Arena.Combat
+{
+	/// <summary>
+	/// Fires projectiles from a muzzle, limited by the fire interval and the ammo count.
+	/// Placed on the root of the shooter, which the projectiles ignore.
+	/// </summary>
+	public class ProjectileLauncher : MonoBehaviour
+	{
+		[System.Serializable]
+		public class Settings
+		{
+			[Tooltip("Weapon data: damage, fire interval, ammo, projectile.")]
+			public WeaponData Weapon;
+		}
+
+		[System.Serializable]
+		public struct References
+		{
+			[Tooltip("Spawn point of the projectiles. Its forward axis gives the direction.")]
+			public Transform Muzzle;
+		}
+
+		[System.Serializable]
+		public class StateContainer
+		{
+			public int Ammo;
+		}
+
+		#region Fields
+
+		[SerializeField] private Settings _settings;
+		[SerializeField] private References _references;
+		[SerializeField] private StateContainer _state;
+
+		/// <summary>
+		/// Raised with the current and max ammo each time the ammo changes.
+		/// </summary>
+		public event Action<int, int> OnAmmoChange;
+
+		public StateContainer State => _state;
+		public int MaxAmmo => _settings.Weapon.MaxAmmo;
+
+		private float _nextFireTime;
+
+		#endregion
+
+		#region Unity Lifecycle
+
+		private void Awake()
+		{
+			_state.Ammo = MaxAmmo;
+		}
+
+		#endregion
+
+		#region Public Methods
+
+		/// <summary>
+		/// Fires one projectile if the weapon is ready and has ammo. Returns true if a shot was fired.
+		/// </summary>
+		public bool TryFire()
+		{
+			if (Time.time < _nextFireTime || _state.Ammo <= 0)
+				return false;
+
+			_nextFireTime = Time.time + _settings.Weapon.FireInterval;
+			SetAmmo(_state.Ammo - 1);
+
+			Transform muzzle = _references.Muzzle;
+			Projectile projectile = Instantiate(_settings.Weapon.ProjectilePrefab, muzzle.position, muzzle.rotation);
+			projectile.Launch(_settings.Weapon.Damage, gameObject);
+			return true;
+		}
+
+		/// <summary>
+		/// Adds ammo without exceeding the weapon maximum.
+		/// </summary>
+		public void AddAmmo(int amount)
+		{
+			if (amount <= 0)
+				return;
+
+			SetAmmo(Mathf.Min(_state.Ammo + amount, MaxAmmo));
+		}
+
+		#endregion
+
+		#region Private Methods
+
+		private void SetAmmo(int value)
+		{
+			_state.Ammo = value;
+			OnAmmoChange?.Invoke(_state.Ammo, MaxAmmo);
+		}
+
+		[ContextMenu("Debug/Try Fire")]
+		private void DebugTryFire()
+		{
+			TryFire();
+		}
+
+		#endregion
+	}
+}
--- a/Assets/_Content/Scripts/Combat/ProjectileLauncher.cs.meta
+++ b/Assets/_Content/Scripts/Combat/ProjectileLauncher.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 1a1a8c56cfabcd648a0967ce7acc5ed3
--- a/Assets/_Content/Scripts/Combat/UiManager.cs
+++ b/Assets/_Content/Scripts/Combat/UiManager.cs
@@ -0,0 +1,68 @@
+using UnityEngine;
+using Arena.Characters;
+
+namespace Arena.UI
+{
+	/// <summary>
+	/// Single entry point of the UI: connects the views to the player and switches screens.
+	/// </summary>
+	public class UiManager : MonoBehaviour
+	{
+		[System.Serializable]
+		public struct References
+		{
+			[Tooltip("In-game screen: health, ammo.")]
+			public GameObject Hud;
+			public HealthView HealthView;
+			public AmmoView AmmoView;
+			public GameOverView GameOverView;
+		}
+
+		#region Fields
+
+		[SerializeField] private References _references;
+
+		private Player _player;
+
+		#endregion
+
+		#region Unity Lifecycle
+
+		private void Start()
+		{
+			// Start: every Awake has run, so Player.Instance is set
+			_player = Player.Instance;
+
+			if (_player == null)
+			{
+				Debug.LogError("UiManager: no Player in the scene.");
+				return;
+			}
+
+			_references.HealthView.Bind(_player.Health);
+			_references.AmmoView.Bind(_player.Launcher);
+			_player.Health.OnDied += HandlePlayerDied;
+
+			_references.Hud.SetActive(true);
+			_references.GameOverView.Hide();
+		}
+
+		private void OnDestroy()
+		{
+			if (_player != null)
+				_player.Health.OnDied -= HandlePlayerDied;
+		}
+
+		#endregion
+
+		#region Private Methods
+
+		private void HandlePlayerDied()
+		{
+			_references.Hud.SetActive(false);
+			_references.GameOverView.Show();
+		}
+
+		#endregion
+	}
+}
--- a/Assets/_Content/Scripts/Combat/UiManager.cs.meta
+++ b/Assets/_Content/Scripts/Combat/UiManager.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 4c6cb5ac8e4f8d0479afda241378ff0b
--- a/Assets/_Content/Scripts/Combat/WeaponData.cs
+++ b/Assets/_Content/Scripts/Combat/WeaponData.cs
@@ -0,0 +1,32 @@
+using UnityEngine;
+
+namespace Arena.Combat
+{
+	/// <summary>
+	/// Settings of a weapon, shared by every launcher that uses it.
+	/// </summary>
+	[CreateAssetMenu(fileName = "WeaponData_new", menuName = "Arena/Combat/Weapon Data")]
+	public class WeaponData : ScriptableObject
+	{
+		#region Fields
+
+		[Tooltip("Damage dealt by one projectile.")]
+		[SerializeField, Min(0)] private int _damage = 10;
+
+		[Tooltip("Time between two shots, in seconds.")]
+		[SerializeField, Min(0.05f)] private float _fireInterval = 0.2f;
+
+		[Tooltip("Ammo when the weapon is full.")]
+		[SerializeField, Min(1)] private int _maxAmmo = 30;
+
+		[Tooltip("Prefab fired by the weapon.")]
+		[SerializeField] private Projectile _projectilePrefab;
+
+		public int Damage => _damage;
+		public float FireInterval => _fireInterval;
+		public int MaxAmmo => _maxAmmo;
+		public Projectile ProjectilePrefab => _projectilePrefab;
+
+		#endregion
+	}
+}
--- a/Assets/_Content/Scripts/Combat/WeaponData.cs.meta
+++ b/Assets/_Content/Scripts/Combat/WeaponData.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: b4a4852c6f394a441935fae7b9f9ec82
--- a/Assets/_Content/Scripts/PlayerMover.cs
+++ b/Assets/_Content/Scripts/PlayerMover.cs
@@ -1,53 +0,0 @@
-using System.ComponentModel;
-using UnityEngine;
-
-public class PlayerMover : MonoBehaviour
-{
-    [System.Serializable]
-    private class Settings
-    {
-        public float Speed = 5;
-    }
-
-    [System.Serializable]
-    private struct References
-    {
-        public CharacterController Controller;
-    }
-
-    [System.Serializable]
-    public class StateContainer
-    {
-        public bool IsJumping = false;
-    }
-
-#region FIELDS
-
-    const float MS_TO_KMH = 1 / 3.6f;
-    
-    [SerializeField] private Settings _settings;
-    [SerializeField] private References _references;
-    [SerializeField] private StateContainer _state;
-
-    public StateContainer State => _state;
-
-#endregion
-
-#region UNITY LIFECYCLES
-
-    void Update()
-    {
-        float t = Time.deltaTime;
-
-        Move(t);
-    }
-
-    private void Move(float t)
-    {
-        transform.position += Vector3.forward * t * MS_TO_KMH * _settings.Speed;
-    }
-
-#endregion
-
-
-}
--- a/Assets/_Content/Scripts/UI.meta
+++ b/Assets/_Content/Scripts/UI.meta
@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: e11b6fbe420e7b94b8000b7e9c608900
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/Assets/_Content/Scripts/UI/AmmoView.cs
+++ b/Assets/_Content/Scripts/UI/AmmoView.cs
@@ -0,0 +1,59 @@
+using TMPro;
+using UnityEngine;
+using Arena.Combat;
+
+namespace Arena.UI
+{
+	/// <summary>
+	/// Displays the ammo of a launcher as "current / max".
+	/// </summary>
+	public class AmmoView : MonoBehaviour
+	{
+		[System.Serializable]
+		public struct References
+		{
+			public TMP_Text Label;
+		}
+
+		#region Fields
+
+		[SerializeField] private References _references;
+
+		private ProjectileLauncher _launcher;
+
+		#endregion
+
+		#region Unity Lifecycle
+
+		private void OnDestroy()
+		{
+			if (_launcher != null)
+				_launcher.OnAmmoChange -= HandleAmmoChange;
+		}
+
+		#endregion
+
+		#region Public Methods
+
+		/// <summary>
+		/// Starts displaying the ammo of a launcher. Called by the UiManager.
+		/// </summary>
+		public void Bind(ProjectileLauncher launcher)
+		{
+			_launcher = launcher;
+			_launcher.OnAmmoChange += HandleAmmoChange;
+			HandleAmmoChange(_launcher.State.Ammo, _launcher.MaxAmmo);
+		}
+
+		#endregion
+
+		#region Private Methods
+
+		private void HandleAmmoChange(int current, int max)
+		{
+			_references.Label.SetText("{0} / {1}", current, max);
+		}
+
+		#endregion
+	}
+}
--- a/Assets/_Content/Scripts/UI/AmmoView.cs.meta
+++ b/Assets/_Content/Scripts/UI/AmmoView.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: ca9ade34ced9c264fad512c9408d61d8
--- a/Assets/_Content/Scripts/UI/GameOverView.cs
+++ b/Assets/_Content/Scripts/UI/GameOverView.cs
@@ -0,0 +1,33 @@
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+namespace Arena.UI
+{
+	/// <summary>
+	/// Game over screen. Its Restart button reloads the scene.
+	/// </summary>
+	public class GameOverView : MonoBehaviour
+	{
+		#region Public Methods
+
+		public void Show()
+		{
+			gameObject.SetActive(true);
+		}
+
+		public void Hide()
+		{
+			gameObject.SetActive(false);
+		}
+
+		/// <summary>
+		/// Called by the Restart button (OnClick in the Inspector).
+		/// </summary>
+		public void Restart()
+		{
+			SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex);
+		}
+
+		#endregion
+	}
+}
--- a/Assets/_Content/Scripts/UI/GameOverView.cs.meta
+++ b/Assets/_Content/Scripts/UI/GameOverView.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 78d77256975d6d7499a20292c00b0649
--- a/Assets/_Content/Scripts/UI/HealthView.cs
+++ b/Assets/_Content/Scripts/UI/HealthView.cs
@@ -0,0 +1,60 @@
+using TMPro;
+using UnityEngine;
+using Arena.Combat;
+
+namespace Arena.UI
+{
+	/// <summary>
+	/// Displays a Health as "current / max".
+	/// </summary>
+	public class HealthView : MonoBehaviour
+	{
+		[System.Serializable]
+		public struct References
+		{
+			public TMP_Text Label;
+		}
+
+		#region Fields
+
+		[SerializeField] private References _references;
+
+		private Health _health;
+
+		#endregion
+
+		#region Unity Lifecycle
+
+		private void OnDestroy()
+		{
+			// Every subscription has its unsubscription
+			if (_health != null)
+				_health.OnChange -= HandleHealthChange;
+		}
+
+		#endregion
+
+		#region Public Methods
+
+		/// <summary>
+		/// Starts displaying a Health. Called by the UiManager.
+		/// </summary>
+		public void Bind(Health health)
+		{
+			_health = health;
+			_health.OnChange += HandleHealthChange;
+			HandleHealthChange(_health.Current, _health.Max);
+		}
+
+		#endregion
+
+		#region Private Methods
+
+		private void HandleHealthChange(int current, int max)
+		{
+			_references.Label.SetText("{0} / {1}", current, max);
+		}
+
+		#endregion
+	}
+}
--- a/Assets/_Content/Scripts/UI/HealthView.cs.meta
+++ b/Assets/_Content/Scripts/UI/HealthView.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: c96e24dd38a22b546a15f929ee0f0c91