Add HUD presenter component and player HUD scene for health and ammo display

Code/Presenters/HudPresenterComponent.cs

@@ -0,0 +1,121 @@
+using System.Linq;
+using GameCore.Attributes;
+using GameCore.Combat;
+using GameCore.Combat.Effects;
+using GameCore.ECS;
+using GameCore.ECS.Interfaces;
+using GameCore.Events;
+using GameCore.Inventory;
+using GameCore.Player;
+using Godot;
+
+namespace CryptonymThunder.Code.Presenters;
+
+[GlobalClass]
+public partial class HudPresenterComponent : Control, IPresenterComponent
+{
+    private World _world;
+    private Entity _playerEntity;
+    private AttributeComponent _playerAttributes;
+    private EquipmentComponent _playerEquipment;
+    private InventoryComponent _playerInventory;
+    
+    [Export] private Label _healthLabel;
+    [Export] private Label _ammoLabel;
+    [Export] private Label _weaponLabel;
+
+    private string _currentAmmoId;
+    
+    public void Initialize(Entity coreEntity, World world)
+    {
+        _world = world;
+        _playerEntity = coreEntity;
+        
+        _playerAttributes = world.GetComponent<AttributeComponent>(_playerEntity);
+        _playerEquipment = world.GetComponent<EquipmentComponent>(_playerEntity);
+        _playerInventory = world.GetComponent<InventoryComponent>(_playerEntity);
+
+        if (_playerAttributes != null)
+        {
+            _playerAttributes.OnAttributeChanged += OnAttributeChanged;
+            OnAttributeChanged(Attribute.Health, _playerAttributes.GetValue(Attribute.Health));
+        }
+        
+        _world.Subscribe<EntityDamagedEvent>(OnEntityDamaged);
+        _world.Subscribe<EntityHealedEvent>(OnEntityHealed);
+        _world.Subscribe<InventoryItemChangedEvent>(OnInventoryChanged);
+        _world.Subscribe<WeaponEquippedEvent>(OnWeaponEquipped);
+    }
+
+    private void OnWeaponEquipped(WeaponEquippedEvent e)
+    {
+        if (!e.Owner.Equals(_playerEntity)) return;
+        _weaponLabel.Text = e.NewWeaponItemId;
+
+        _currentAmmoId = null;
+    
+        var playerWeapon = _world.GetComponent<WeaponComponent>(_playerEntity);
+        var ammoCost = playerWeapon?.FireCosts
+            .OfType<ConsumeAmmoCost>()
+            .FirstOrDefault();
+
+        if (ammoCost != null)
+        {
+            _currentAmmoId = ammoCost.AmmoId;
+        }
+        
+        _world.Logger.Info($"Current ammo ID set to {_currentAmmoId}");
+
+        if (_currentAmmoId != null)
+        {
+            var ammoCount = _playerInventory.GetItemCount(_currentAmmoId);
+            _ammoLabel.Text = $"Ammo: {ammoCount}";
+        }
+        else
+        {
+            _ammoLabel.Text = "Ammo: --";
+        }
+    }
+
+    private void OnInventoryChanged(InventoryItemChangedEvent e)
+    {
+        if (!e.Owner.Equals(_playerEntity)) return;
+        
+        _world.Logger.Info($"Inventory changed: {e.ItemId} new quantity: {e.NewQuantity}");
+        
+        if (e.ItemId == _currentAmmoId)
+        {
+            _ammoLabel.Text = $"Ammo: {e.NewQuantity}";
+        }
+    }
+
+    private void OnEntityHealed(EntityHealedEvent e)
+    {
+        if (!e.Target.Equals(_playerEntity)) return;
+        
+        _world.Logger.Info($"Player healed {e.AmountHealed}, new health: {e.NewHealth}");
+    }
+
+    private void OnEntityDamaged(EntityDamagedEvent e)
+    {
+        if (!e.Target.Equals(_playerEntity)) return;
+        
+        _world.Logger.Info($"Player took {e.DamageTaken} damage, new health: {e.NewHealth}");
+    }
+
+    private void OnAttributeChanged(Attribute attr, float newValue)
+    {
+        if (attr == Attribute.Health)
+        {
+            _healthLabel.Text = $"Health: {Mathf.CeilToInt(newValue)}";
+        }
+    }
+
+    public void SyncToPresentation(float delta)
+    {
+    }
+
+    public void SyncToCore(float delta)
+    {
+    }
+}

Code/Presenters/HudPresenterComponent.cs.uid

@@ -0,0 +1 @@
+uid://c6nouigv5wsu1

Objects/UI/player_hud.tscn

@@ -0,0 +1,46 @@
+[gd_scene load_steps=2 format=3 uid="uid://b36xmciamjyc0"]
+
+[ext_resource type="Script" uid="uid://c6nouigv5wsu1" path="res://Code/Presenters/HudPresenterComponent.cs" id="1_yd76s"]
+
+[node name="PlayerHUD" type="Control" node_paths=PackedStringArray("_healthLabel", "_ammoLabel", "_weaponLabel")]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_yd76s")
+_healthLabel = NodePath("MarginContainer/HBoxContainer/HealthLabel")
+_ammoLabel = NodePath("MarginContainer/HBoxContainer/AmmoLabel")
+_weaponLabel = NodePath("MarginContainer/HBoxContainer/WeaponLabel")
+metadata/_custom_type_script = "uid://c6nouigv5wsu1"
+
+[node name="MarginContainer" type="MarginContainer" parent="."]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+theme_override_constants/margin_left = 8
+theme_override_constants/margin_top = 8
+theme_override_constants/margin_right = 8
+theme_override_constants/margin_bottom = 8
+
+[node name="HBoxContainer" type="HBoxContainer" parent="MarginContainer"]
+layout_mode = 2
+
+[node name="HealthLabel" type="Label" parent="MarginContainer/HBoxContainer"]
+layout_mode = 2
+text = "health 100"
+uppercase = true
+
+[node name="AmmoLabel" type="Label" parent="MarginContainer/HBoxContainer"]
+layout_mode = 2
+text = "ammo 100"
+uppercase = true
+
+[node name="WeaponLabel" type="Label" parent="MarginContainer/HBoxContainer"]
+layout_mode = 2
+text = "gun"
+uppercase = true

Objects/player.tscn

@@ -1,6 +1,7 @@
-[gd_scene load_steps=5 format=3 uid="uid://c576jiewfs5gj"]
+[gd_scene load_steps=6 format=3 uid="uid://c576jiewfs5gj"]
 
 [ext_resource type="Script" uid="uid://hkiny1ftv4r7" path="res://Code/Presenters/CharacterBody3DPresenter.cs" id="2_3y5cq"]
+[ext_resource type="PackedScene" uid="uid://b36xmciamjyc0" path="res://Objects/UI/player_hud.tscn" id="3_0ad8t"]
 [ext_resource type="Script" uid="uid://crx03e8buoni3" path="res://Code/Presenters/CameraPresenterComponent.cs" id="3_2i4gt"]
 
 [sub_resource type="CapsuleShape3D" id="CapsuleShape3D_y0qk3"]
@@ -26,3 +27,5 @@ transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1.5901337, 0)
 script = ExtResource("3_2i4gt")
 
 [node name="Camera3D" type="Camera3D" parent="CameraPivot"]
+
+[node name="PlayerHUD" parent="." instance=ExtResource("3_0ad8t")]

project.godot

@@ -28,6 +28,7 @@ project/assembly_name="cryptonym-thunder"
 folder_colors={
 "res://Code/": "blue",
 "res://Objects/": "orange",
+"res://Objects/UI/": "green",
 "res://Scenes/": "green"
 }