Add pawn utility-AI brain; format code with CSharpier; enforce formatter

Wire the engine's new MrGameEng.AI module into a PawnBrain for world pawns, plus surrounding content/scene tweaks. Apply CSharpier across the game and document the convention in CLAUDE.md. Add .vscode/settings.json so the editor formats on save with the CSharpier extension.
2026-06-12 07:20:03 +03:00
parent 8bc30e008e
commit 58de27248e
14 changed files with 553 additions and 153 deletions
@@ -0,0 +1,5 @@
+{
+    "editor.defaultFormatter": "csharpier.csharpier-vscode",
+    "editor.formatOnPaste": true,
+    "editor.formatOnSave": true
+}
@@ -63,3 +63,7 @@ Never commit a pointer to an unpushed engine commit.
 - Content as data: numbers, textures and balance live in `Mods/Core/Defs`, user-facing
  strings in `Mods/Core/Languages` — code only defines systems and def classes.
 - Every new mechanic gets a dev-console command for testing (`regen`, `timescale`, …).
+- Formatting: all C# code is formatted with **CSharpier** (`editor.defaultFormatter`
+  is `csharpier.csharpier-vscode`, format-on-save is on). Match CSharpier's output —
+  run `csharpier format .` (or let format-on-save handle it) before committing; never
+  hand-format against it.
@@ -51,6 +51,10 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MrGameEng.Mods", "engine\sr
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MrGameEng.Mods.Tests", "engine\tests\MrGameEng.Mods.Tests\MrGameEng.Mods.Tests.csproj", "{07986629-FE7C-42BE-868B-0FCA1915D2A2}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MrGameEng.AI", "engine\src\MrGameEng.AI\MrGameEng.AI.csproj", "{EBD0B6A4-B8F3-45D6-88EF-D5D17DEDEFA5}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MrGameEng.AI.Tests", "engine\tests\MrGameEng.AI.Tests\MrGameEng.AI.Tests.csproj", "{6731DC3C-0807-4791-AF8E-C56F7F7D1F85}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -301,6 +305,30 @@ Global
 		{07986629-FE7C-42BE-868B-0FCA1915D2A2}.Release|x64.Build.0 = Release|Any CPU
 		{07986629-FE7C-42BE-868B-0FCA1915D2A2}.Release|x86.ActiveCfg = Release|Any CPU
 		{07986629-FE7C-42BE-868B-0FCA1915D2A2}.Release|x86.Build.0 = Release|Any CPU
+		{EBD0B6A4-B8F3-45D6-88EF-D5D17DEDEFA5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{EBD0B6A4-B8F3-45D6-88EF-D5D17DEDEFA5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{EBD0B6A4-B8F3-45D6-88EF-D5D17DEDEFA5}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{EBD0B6A4-B8F3-45D6-88EF-D5D17DEDEFA5}.Debug|x64.Build.0 = Debug|Any CPU
+		{EBD0B6A4-B8F3-45D6-88EF-D5D17DEDEFA5}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{EBD0B6A4-B8F3-45D6-88EF-D5D17DEDEFA5}.Debug|x86.Build.0 = Debug|Any CPU
+		{EBD0B6A4-B8F3-45D6-88EF-D5D17DEDEFA5}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{EBD0B6A4-B8F3-45D6-88EF-D5D17DEDEFA5}.Release|Any CPU.Build.0 = Release|Any CPU
+		{EBD0B6A4-B8F3-45D6-88EF-D5D17DEDEFA5}.Release|x64.ActiveCfg = Release|Any CPU
+		{EBD0B6A4-B8F3-45D6-88EF-D5D17DEDEFA5}.Release|x64.Build.0 = Release|Any CPU
+		{EBD0B6A4-B8F3-45D6-88EF-D5D17DEDEFA5}.Release|x86.ActiveCfg = Release|Any CPU
+		{EBD0B6A4-B8F3-45D6-88EF-D5D17DEDEFA5}.Release|x86.Build.0 = Release|Any CPU
+		{6731DC3C-0807-4791-AF8E-C56F7F7D1F85}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6731DC3C-0807-4791-AF8E-C56F7F7D1F85}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6731DC3C-0807-4791-AF8E-C56F7F7D1F85}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{6731DC3C-0807-4791-AF8E-C56F7F7D1F85}.Debug|x64.Build.0 = Debug|Any CPU
+		{6731DC3C-0807-4791-AF8E-C56F7F7D1F85}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{6731DC3C-0807-4791-AF8E-C56F7F7D1F85}.Debug|x86.Build.0 = Debug|Any CPU
+		{6731DC3C-0807-4791-AF8E-C56F7F7D1F85}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6731DC3C-0807-4791-AF8E-C56F7F7D1F85}.Release|Any CPU.Build.0 = Release|Any CPU
+		{6731DC3C-0807-4791-AF8E-C56F7F7D1F85}.Release|x64.ActiveCfg = Release|Any CPU
+		{6731DC3C-0807-4791-AF8E-C56F7F7D1F85}.Release|x64.Build.0 = Release|Any CPU
+		{6731DC3C-0807-4791-AF8E-C56F7F7D1F85}.Release|x86.ActiveCfg = Release|Any CPU
+		{6731DC3C-0807-4791-AF8E-C56F7F7D1F85}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -328,5 +356,7 @@ Global
 		{B9161776-32FE-415E-9401-DC5BB87FC225} = {CD3B5CE5-C23F-38B4-04AA-A303F94731A5}
 		{F91AA8C8-FD6B-4B92-BB3A-844DCA932D82} = {F4A69A46-AF86-AB4E-7D23-4CCCB7B9A519}
 		{07986629-FE7C-42BE-868B-0FCA1915D2A2} = {CD3B5CE5-C23F-38B4-04AA-A303F94731A5}
+		{EBD0B6A4-B8F3-45D6-88EF-D5D17DEDEFA5} = {F4A69A46-AF86-AB4E-7D23-4CCCB7B9A519}
+		{6731DC3C-0807-4791-AF8E-C56F7F7D1F85} = {CD3B5CE5-C23F-38B4-04AA-A303F94731A5}
 	EndGlobalSection
 EndGlobal
@@ -9,8 +9,8 @@
 - [x] Жители-заглушки (блуждание), камера бога, HUD, консоль (`regen`)

 ## Этап 1 — Жители как агенты
- [ ] Потребности: голод, усталость (тикают со временем)
- [ ] Utility-выбор действия: искать еду / отдыхать / бродить
+- [~] Потребности: голод, усталость (тикают со временем) — усталость/энергия готова (`PawnNeeds`), голод впереди
+- [~] Utility-выбор действия: искать еду / отдыхать / бродить — каркас на движке (`MrGameEng.AI`), выбор «отдыхать/бродить» работает; «искать еду» впереди
 - [ ] Еда на траве/в лесу: растёт, собирается, истощается
 - [ ] Смерть от голода; визуальное состояние жителя (цвет/прозрачность)
 - [ ] Консоль: `spawn <n>`, `feed`, `starve` для тестов
@@ -16,7 +16,8 @@ public sealed class GameContent
        DefDatabase defs,
        LanguageManager languages,
        TerrainSet terrains,
-        string atlasCacheDirectory)
+        string atlasCacheDirectory
+    )
    {
        Mods = mods;
        Defs = defs;
@@ -46,9 +47,11 @@ public sealed class GameContent
    /// </summary>
    public static GameContent Load()
    {
-        var modsRoot = ModLoader.FindModsRoot(AppContext.BaseDirectory)
+        var modsRoot =
+            ModLoader.FindModsRoot(AppContext.BaseDirectory)
            ?? throw new DirectoryNotFoundException(
-                "Папка Mods не найдена ни рядом с игрой, ни выше по дереву каталогов.");
+                "Папка Mods не найдена ни рядом с игрой, ни выше по дереву каталогов."
+            );
        var mods = ModLoader.Load(modsRoot);

        var defs = new DefDatabase();
@@ -62,14 +65,31 @@ public sealed class GameContent

        // Текстуры поздних модов переопределяют ранние по относительному пути;
        // сборка инкрементальная — без изменений старт мгновенный.
-        var atlasCacheDirectory = Path.Combine(Path.GetDirectoryName(modsRoot)!, "Cache", "Atlases");
+        var atlasCacheDirectory = Path.Combine(
+            Path.GetDirectoryName(modsRoot)!,
+            "Cache",
+            "Atlases"
+        );
        var textures = ModContentTree.Build(mods, "Textures", ".png", ".jpg", ".jpeg", ".bmp");
        var result = AtlasBuilder.Build(
-            new AtlasBuildOptions { OutputDirectory = atlasCacheDirectory, GroupDepth = ModAtlases.GroupDepth },
-            textures.Files.Select(f => (f.FullPath, f.RelativePath)));
+            new AtlasBuildOptions
+            {
+                OutputDirectory = atlasCacheDirectory,
+                GroupDepth = ModAtlases.GroupDepth,
+            },
+            textures.Files.Select(f => (f.FullPath, f.RelativePath))
+        );
        var built = result.Groups.Count(g => !g.Skipped);
-        Log.Info($"Atlases: {built} built, {result.Groups.Count - built} up to date ({result.Groups.Count} total)");
+        Log.Info(
+            $"Atlases: {built} built, {result.Groups.Count - built} up to date ({result.Groups.Count} total)"
+        );

-        return new GameContent(mods, defs, languages, new TerrainSet(defs.All<TerrainDef>()), atlasCacheDirectory);
+        return new GameContent(
+            mods,
+            defs,
+            languages,
+            new TerrainSet(defs.All<TerrainDef>()),
+            atlasCacheDirectory
+        );
    }
 }
@@ -14,7 +14,9 @@ public sealed class ModAtlases : IDisposable
    public const int GroupDepth = 2;

    private readonly string _directory;
-    private readonly Dictionary<string, TextureAtlas> _loaded = new(StringComparer.OrdinalIgnoreCase);
+    private readonly Dictionary<string, TextureAtlas> _loaded = new(
+        StringComparer.OrdinalIgnoreCase
+    );

    /// <summary>Создаёт реестр над кэш-директорией атласов.</summary>
    public ModAtlases(string directory) => _directory = directory;
@@ -10,7 +10,9 @@ public sealed class TerrainSet
    {
        if (defs.Count == 0)
        {
-            throw new InvalidDataException("Не загружен ни один TerrainDef — отсутствует Core-мод?");
+            throw new InvalidDataException(
+                "Не загружен ни один TerrainDef — отсутствует Core-мод?"
+            );
        }

        _byHeight = defs.OrderBy(d => d.MaxHeight).ToArray();
@@ -1,5 +1,4 @@
 <Project Sdk="Microsoft.NET.Sdk">
-
  <PropertyGroup>
    <OutputType>WinExe</OutputType>
    <TargetFramework>net8.0</TargetFramework>
@@ -14,17 +13,20 @@
    <ProjectReference Include="..\..\engine\src\MrGameEng.Atlases\MrGameEng.Atlases.csproj" />
    <ProjectReference Include="..\..\engine\src\MrGameEng.Tilemaps\MrGameEng.Tilemaps.csproj" />
    <ProjectReference Include="..\..\engine\src\MrGameEng.Pathfinding\MrGameEng.Pathfinding.csproj" />
+    <ProjectReference Include="..\..\engine\src\MrGameEng.AI\MrGameEng.AI.csproj" />
    <ProjectReference Include="..\..\engine\src\MrGameEng.Collisions\MrGameEng.Collisions.csproj" />
    <ProjectReference Include="..\..\engine\src\MrGameEng.UI\MrGameEng.UI.csproj" />
    <ProjectReference Include="..\..\engine\src\MrGameEng.DevConsole\MrGameEng.DevConsole.csproj" />
    <ProjectReference Include="..\..\engine\src\MrGameEng.Mods\MrGameEng.Mods.csproj" />
-    <ProjectReference Include="..\..\engine\src\MrGameEng.Assets.Generator\MrGameEng.Assets.Generator.csproj"
-                      OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
+    <ProjectReference
+      Include="..\..\engine\src\MrGameEng.Assets.Generator\MrGameEng.Assets.Generator.csproj"
+      OutputItemType="Analyzer"
+      ReferenceOutputAssembly="false"
+    />
  </ItemGroup>

  <ItemGroup>
    <AdditionalFiles Include="Assets\**\*.*" />
    <None Include="Assets\**\*.*" CopyToOutputDirectory="PreserveNewest" />
  </ItemGroup>
-
 </Project>
@@ -14,7 +14,8 @@ using var host = new GameHost(
        Height = 720,
        ClearColor = new Color(12, 16, 24),
    },
-    new WorldScene(seed: 1337));
+    new WorldScene(seed: 1337)
+);

 host.Context.Services.Add(content);
 host.Context.Services.Add(new ModAtlases(content.AtlasCacheDirectory));
@@ -17,9 +17,17 @@ internal static class ScatterSpawner
    /// когда заданы слои коллизий.
    /// </summary>
    public static void Spawn(
-        Scene scene, GameContent content, ModAtlases atlases, GraphicsDevice device,
-        TerrainDef terrain, Point cell, int cellSize, Random random,
-        uint obstacleLayer = 0, uint collidesWith = 0)
+        Scene scene,
+        GameContent content,
+        ModAtlases atlases,
+        GraphicsDevice device,
+        TerrainDef terrain,
+        Point cell,
+        int cellSize,
+        Random random,
+        uint obstacleLayer = 0,
+        uint collidesWith = 0
+    )
    {
        foreach (var entry in terrain.Scatter)
        {
@@ -36,9 +44,12 @@ internal static class ScatterSpawner
                new Transform2D(
                    new Vector2(
                        (cell.X + 0.3f + random.NextSingle() * 0.4f) * cellSize,
-                        (cell.Y + 0.3f + random.NextSingle() * 0.4f) * cellSize),
-                    scale: new Vector2(cellSize * plant.SizeCells / region.Width)),
-                sprite);
+                        (cell.Y + 0.3f + random.NextSingle() * 0.4f) * cellSize
+                    ),
+                    scale: new Vector2(cellSize * plant.SizeCells / region.Width)
+                ),
+                sprite
+            );

            if (obstacleLayer != 0 && plant.TrunkRadiusCells > 0f)
            {
@@ -57,7 +68,10 @@ internal static class ContentCommands
    /// <summary>Регистрирует (или перерегистрирует) команды контента на общей консоли.</summary>
    public static void Register(DevConsole console, GameContent content, ModAtlases atlases)
    {
-        console.Register("mods", "mods — list active mods in load order", (c, _) =>
+        console.Register(
+            "mods",
+            "mods — list active mods in load order",
+            (c, _) =>
            {
                foreach (var mod in content.Mods)
                {
@@ -65,24 +79,35 @@ internal static class ContentCommands
                }

                c.WriteLine($"{content.Mods.Count} mod(s)");
-        });
+            }
+        );

-        console.Register("lang", "lang [code] — show or switch the UI language", (c, args) =>
+        console.Register(
+            "lang",
+            "lang [code] — show or switch the UI language",
+            (c, args) =>
            {
                if (args.Length == 0)
                {
                    c.WriteLine(
-                    $"language: {content.Languages.CurrentLanguage} " +
-                    $"(available: {string.Join(", ", content.Languages.AvailableLanguages)})");
+                        $"language: {content.Languages.CurrentLanguage} "
+                            + $"(available: {string.Join(", ", content.Languages.AvailableLanguages)})"
+                    );
                    return;
                }

-            c.WriteLine(content.Languages.SetLanguage(args[0])
+                c.WriteLine(
+                    content.Languages.SetLanguage(args[0])
                        ? $"language set to {content.Languages.CurrentLanguage}"
-                : $"unknown language '{args[0]}'; available: {string.Join(", ", content.Languages.AvailableLanguages)}");
-        });
+                        : $"unknown language '{args[0]}'; available: {string.Join(", ", content.Languages.AvailableLanguages)}"
+                );
+            }
+        );

-        console.Register("defs", "defs [type] — list def types or defs of one type", (c, args) =>
+        console.Register(
+            "defs",
+            "defs [type] — list def types or defs of one type",
+            (c, args) =>
            {
                if (args.Length == 0)
                {
@@ -97,7 +122,9 @@ internal static class ContentCommands
                var names = content.Defs.NamesOf(args[0]);
                if (names.Count == 0)
                {
-                c.WriteLine($"no defs of type '{args[0]}'; types: {string.Join(", ", content.Defs.TypeKeys)}");
+                    c.WriteLine(
+                        $"no defs of type '{args[0]}'; types: {string.Join(", ", content.Defs.TypeKeys)}"
+                    );
                    return;
                }

@@ -107,15 +134,26 @@ internal static class ContentCommands
                }

                c.WriteLine($"{names.Count} def(s)");
-        });
+            }
+        );

-        console.Register("atlas", "atlas [name] [filter] — inspect loaded texture atlases", (c, args) =>
+        console.Register(
+            "atlas",
+            "atlas [name] [filter] — inspect loaded texture atlases",
+            (c, args) =>
            {
                if (args.Length == 0)
                {
-                foreach (var (name, atlas) in atlases.Loaded.OrderBy(a => a.Key, StringComparer.Ordinal))
+                    foreach (
+                        var (name, atlas) in atlases.Loaded.OrderBy(
+                            a => a.Key,
+                            StringComparer.Ordinal
+                        )
+                    )
                    {
-                    c.WriteLine($"  {name}: {atlas.Pages.Count} page(s), {atlas.Regions.Count} region(s)");
+                        c.WriteLine(
+                            $"  {name}: {atlas.Pages.Count} page(s), {atlas.Regions.Count} region(s)"
+                        );
                    }

                    c.WriteLine($"{atlases.Loaded.Count} atlas(es) loaded");
@@ -124,13 +162,17 @@ internal static class ContentCommands

                if (!atlases.Loaded.TryGetValue(args[0], out var found))
                {
-                c.WriteLine($"atlas '{args[0]}' is not loaded; loaded: {string.Join(", ", atlases.Loaded.Keys)}");
+                    c.WriteLine(
+                        $"atlas '{args[0]}' is not loaded; loaded: {string.Join(", ", atlases.Loaded.Keys)}"
+                    );
                    return;
                }

                var filter = args.Length > 1 ? args[1] : null;
-            var keys = found.Regions.Keys
-                .Where(k => filter is null || k.Contains(filter, StringComparison.OrdinalIgnoreCase))
+                var keys = found
+                    .Regions.Keys.Where(k =>
+                        filter is null || k.Contains(filter, StringComparison.OrdinalIgnoreCase)
+                    )
                    .Order(StringComparer.Ordinal)
                    .ToList();
                foreach (var key in keys.Take(25))
@@ -138,7 +180,10 @@ internal static class ContentCommands
                    c.WriteLine($"  {key}");
                }

-            c.WriteLine($"{keys.Count} region(s){(keys.Count > 25 ? ", showing first 25" : "")}");
-        });
+                c.WriteLine(
+                    $"{keys.Count} region(s){(keys.Count > 25 ? ", showing first 25" : "")}"
+                );
+            }
+        );
    }
 }
@@ -26,7 +26,12 @@ public sealed class TerrainScene : Scene
    private const int CellSize = 24;
    private const int Population = 14;

-    private static readonly RectF TerrainBounds = new(0f, 0f, TerrainWidth * CellSize, TerrainHeight * CellSize);
+    private static readonly RectF TerrainBounds = new(
+        0f,
+        0f,
+        TerrainWidth * CellSize,
+        TerrainHeight * CellSize
+    );

    private const uint AnimalLayer = 0b01;
    private const uint ObstacleLayer = 0b10;
@@ -42,7 +47,9 @@ public sealed class TerrainScene : Scene
        var atlases = Context.Services.Get<ModAtlases>();
        var device = Context.GraphicsDevice;
        var input = this.UseInput();
-        var renderer = this.UseRenderer2D(new Renderer2DOptions { VirtualResolution = new Point(1280, 720) });
+        var renderer = this.UseRenderer2D(
+            new Renderer2DOptions { VirtualResolution = new Point(1280, 720) }
+        );
        GameLayers.EnsureRegistered(renderer);
        this.UseTilemaps();

@@ -76,8 +83,17 @@ public sealed class TerrainScene : Scene
                }

                ScatterSpawner.Spawn(
-                    this, content, atlases, device, terrain, cell, CellSize, random,
-                    obstacleLayer: ObstacleLayer, collidesWith: AnimalLayer);
+                    this,
+                    content,
+                    atlases,
+                    device,
+                    terrain,
+                    cell,
+                    CellSize,
+                    random,
+                    obstacleLayer: ObstacleLayer,
+                    collidesWith: AnimalLayer
+                );
            }
        }

@@ -98,13 +114,17 @@ public sealed class TerrainScene : Scene
            Store.CreateEntity(
                new Transform2D(
                    new Vector2((cell.X + 0.5f) * CellSize, (cell.Y + 0.5f) * CellSize),
-                    scale: new Vector2(CellSize * animal.SizeCells / body.Width)),
+                    scale: new Vector2(CellSize * animal.SizeCells / body.Width)
+                ),
                sprite,
                new Wander(),
-                collider);
+                collider
+            );
        }

-        var camera = Store.CreateEntity(new Camera(TerrainBounds.Center, zoom: 1.6f, bounds: TerrainBounds));
+        var camera = Store.CreateEntity(
+            new Camera(TerrainBounds.Center, zoom: 1.6f, bounds: TerrainBounds)
+        );

        var desktop = this.UseUI();
        var hudLabel = new Label { Left = 10, Top = 8 };
@@ -112,7 +132,10 @@ public sealed class TerrainScene : Scene

        var console = this.UseDevConsole();
        ContentCommands.Register(console, content, atlases);
-        console.Register("regen", "regen [seed] — regenerate the terrain", (c, args) =>
+        console.Register(
+            "regen",
+            "regen [seed] — regenerate the terrain",
+            (c, args) =>
            {
                if (Context.Scenes.IsTransitioning)
                {
@@ -122,8 +145,12 @@ public sealed class TerrainScene : Scene
                var seed = args.Length > 0 ? int.Parse(args[0]) : Random.Shared.Next();
                c.WriteLine($"regenerating terrain, seed {seed}");
                Context.Scenes.Switch(new TerrainScene(seed), Transition.Fade(0.6f));
-        });
-        console.Register("world", "world [seed] — switch to the world scene", (c, args) =>
+            }
+        );
+        console.Register(
+            "world",
+            "world [seed] — switch to the world scene",
+            (c, args) =>
            {
                if (Context.Scenes.IsTransitioning)
                {
@@ -132,14 +159,19 @@ public sealed class TerrainScene : Scene

                var seed = args.Length > 0 ? int.Parse(args[0]) : _seed;
                Context.Scenes.Switch(new WorldScene(seed), Transition.Fade(0.6f));
-        });
+            }
+        );

        UpdateSystems.Add(new WanderSystem(_seed, TerrainBounds));
        var collisions = this.UseCollisions(cellSize: CellSize * 2f); // после движения
        UpdateSystems.Add(new SeparationSystem(collisions));
        UpdateSystems.Add(new GodCameraSystem(camera, input, console));
-        UpdateSystems.Add(new HudSystem(Context, content.Languages, hudLabel, "hud.terrain", _seed, Population));
+        UpdateSystems.Add(
+            new HudSystem(Context, content.Languages, hudLabel, "hud.terrain", _seed, Population)
+        );

-        Log.Info($"Terrain generated: seed {_seed}, {TerrainWidth}x{TerrainHeight} cells, {Population} animals");
+        Log.Info(
+            $"Terrain generated: seed {_seed}, {TerrainWidth}x{TerrainHeight} cells, {Population} animals"
+        );
    }
 }
@@ -24,7 +24,12 @@ public sealed class WorldScene : Scene
    public const int CellSize = 16;
    private const int Population = 80;

-    private static readonly RectF WorldBounds = new(0f, 0f, WorldWidth * CellSize, WorldHeight * CellSize);
+    private static readonly RectF WorldBounds = new(
+        0f,
+        0f,
+        WorldWidth * CellSize,
+        WorldHeight * CellSize
+    );

    private readonly int _seed;

@@ -37,7 +42,9 @@ public sealed class WorldScene : Scene
        var atlases = Context.Services.Get<ModAtlases>();
        var device = Context.GraphicsDevice;
        var input = this.UseInput();
-        var renderer = this.UseRenderer2D(new Renderer2DOptions { VirtualResolution = new Point(1280, 720) });
+        var renderer = this.UseRenderer2D(
+            new Renderer2DOptions { VirtualResolution = new Point(1280, 720) }
+        );
        GameLayers.EnsureRegistered(renderer);

        var white = new Texture2DRegion(assets.Load(GameAssets.Textures.White));
@@ -54,7 +61,8 @@ public sealed class WorldScene : Scene
                var terrain = content.Terrains.Classify(heights[x, y]);
                Store.CreateEntity(
                    Transform2D.At(new Vector2(x * CellSize, y * CellSize)),
-                    new Sprite(white) { Color = terrain.Tint });
+                    new Sprite(white) { Color = terrain.Tint }
+                );

                var cell = new Point(x, y);
                if (terrain.IsLand)
@@ -62,7 +70,16 @@ public sealed class WorldScene : Scene
                    landCells.Add(cell);
                }

-                ScatterSpawner.Spawn(this, content, atlases, device, terrain, cell, CellSize, random);
+                ScatterSpawner.Spawn(
+                    this,
+                    content,
+                    atlases,
+                    device,
+                    terrain,
+                    cell,
+                    CellSize,
+                    random
+                );
            }
        }

@@ -78,12 +95,19 @@ public sealed class WorldScene : Scene
            Store.CreateEntity(
                new Transform2D(
                    new Vector2((cell.X + 0.5f) * CellSize, (cell.Y + 0.5f) * CellSize),
-                    scale: new Vector2(CellSize * being.SizeCells / body.Width)),
+                    scale: new Vector2(CellSize * being.SizeCells / body.Width)
+                ),
                sprite,
-                new Wander());
+                new Wander(),
+                // Начальная энергия и фаза решения разбросаны сидом — жители не отдыхают синхронно.
+                new PawnNeeds { Energy = 0.5f + random.NextSingle() * 0.5f },
+                new PawnBrain { Action = PawnAction.Wander, DecideIn = random.NextSingle() * 0.75f }
+            );
        }

-        var camera = Store.CreateEntity(new Camera(WorldBounds.Center, zoom: 1f, bounds: WorldBounds));
+        var camera = Store.CreateEntity(
+            new Camera(WorldBounds.Center, zoom: 1f, bounds: WorldBounds)
+        );

        // HUD и консоль.
        var desktop = this.UseUI();
@@ -92,7 +116,10 @@ public sealed class WorldScene : Scene

        var console = this.UseDevConsole();
        ContentCommands.Register(console, content, atlases);
-        console.Register("regen", "regen [seed] — regenerate the world", (c, args) =>
+        console.Register(
+            "regen",
+            "regen [seed] — regenerate the world",
+            (c, args) =>
            {
                if (Context.Scenes.IsTransitioning)
                {
@@ -102,9 +129,13 @@ public sealed class WorldScene : Scene
                var seed = args.Length > 0 ? int.Parse(args[0]) : Random.Shared.Next();
                c.WriteLine($"regenerating world, seed {seed}");
                Context.Scenes.Switch(new WorldScene(seed), Transition.Fade(0.6f));
-        });
+            }
+        );

-        console.Register("terrain", "terrain [seed] — switch to the tile terrain scene", (c, args) =>
+        console.Register(
+            "terrain",
+            "terrain [seed] — switch to the tile terrain scene",
+            (c, args) =>
            {
                if (Context.Scenes.IsTransitioning)
                {
@@ -114,12 +145,54 @@ public sealed class WorldScene : Scene
                var seed = args.Length > 0 ? int.Parse(args[0]) : _seed;
                c.WriteLine($"switching to terrain scene, seed {seed}");
                Context.Scenes.Switch(new TerrainScene(seed), Transition.Fade(0.6f));
-        });
+            }
+        );

+        var decisions = new PawnDecisionSystem();
+        UpdateSystems.Add(decisions);
        UpdateSystems.Add(new WanderSystem(_seed, WorldBounds));
+        UpdateSystems.Add(new PawnNeedsSystem());
+        UpdateSystems.Add(new PawnAppearanceSystem());
        UpdateSystems.Add(new GodCameraSystem(camera, input, console));
-        UpdateSystems.Add(new HudSystem(Context, content.Languages, hudLabel, "hud.world", _seed, Population));
+        UpdateSystems.Add(
+            new HudSystem(Context, content.Languages, hudLabel, "hud.world", _seed, Population)
+        );

-        Log.Info($"World generated: seed {_seed}, {WorldWidth}x{WorldHeight} cells, population {Population}");
+        console.Register(
+            "ai",
+            "ai [energy] — utility scores at the given energy (0..1), plus the rest/wander split",
+            (c, args) =>
+            {
+                var energy =
+                    args.Length > 0 && float.TryParse(args[0], out var e)
+                        ? Math.Clamp(e, 0f, 1f)
+                        : 0.3f;
+                c.WriteLine($"utility scores at energy {energy:0.00}:");
+                foreach (var (name, score) in decisions.Inspect(energy))
+                {
+                    c.WriteLine($"  {name, -8} {score:0.000}");
+                }
+
+                var resting = 0;
+                var total = 0;
+                Store
+                    .Query<PawnBrain>()
+                    .ForEachEntity(
+                        (ref PawnBrain brain, Entity _) =>
+                        {
+                            total++;
+                            if (brain.Action == PawnAction.Rest)
+                            {
+                                resting++;
+                            }
+                        }
+                    );
+                c.WriteLine($"population: {resting} resting / {total - resting} wandering");
+            }
+        );
+
+        Log.Info(
+            $"World generated: seed {_seed}, {WorldWidth}x{WorldHeight} cells, population {Population}"
+        );
    }
 }
@@ -0,0 +1,161 @@
+using Friflo.Engine.ECS;
+using Friflo.Engine.ECS.Systems;
+using Microsoft.Xna.Framework;
+using MrGameEng.AI;
+using MrGameEng.Graphics;
+
+namespace LittleSim.Sim;
+
+/// <summary>Что житель делает прямо сейчас — результат utility-выбора.</summary>
+public enum PawnAction
+{
+    /// <summary>Бродит по миру, тратя энергию.</summary>
+    Wander,
+
+    /// <summary>Стоит и восстанавливает энергию.</summary>
+    Rest,
+}
+
+/// <summary>
+/// Потребности жителя. Пока одна — энергия (0 — без сил, 1 — полон сил); со временем
+/// расходуется при блуждании и восстанавливается на отдыхе. Голод/жажда добавятся так же.
+/// </summary>
+public struct PawnNeeds : IComponent
+{
+    /// <summary>Запас сил в диапазоне [0, 1].</summary>
+    public float Energy;
+}
+
+/// <summary>
+/// «Мозг» жителя: выбранное действие и таймер до следующего пересмотра решения.
+/// Решение принимает <see cref="PawnDecisionSystem"/> через движковый <see cref="UtilityAi{TContext}"/>.
+/// </summary>
+public struct PawnBrain : IComponent
+{
+    /// <summary>Текущее действие.</summary>
+    public PawnAction Action;
+
+    /// <summary>Секунды до следующего пересмотра решения — не пересчитываем выбор каждый кадр.</summary>
+    public float DecideIn;
+}
+
+/// <summary>Снимок состояния жителя, который читают соображения utility-выбора.</summary>
+public readonly record struct PawnContext(float Energy);
+
+/// <summary>
+/// Utility-выбор действия жителя на движковом <see cref="UtilityAi{TContext}"/>. Reasoner строится
+/// один раз; каждый житель пересматривает решение раз в <see cref="ReevaluateInterval"/> секунд, а
+/// не каждый кадр (энергия меняется медленно — частить незачем, и решение не дёргается на границе).
+/// Выбор детерминирован: при равенстве очков побеждает первое действие.
+/// </summary>
+public sealed class PawnDecisionSystem : QuerySystem<PawnNeeds, PawnBrain>
+{
+    private const float ReevaluateInterval = 0.75f;
+
+    private readonly UtilityAi<PawnContext> _brain = new(
+        // Отдых тянет к себе только когда сил мало: (1 − energy)^3 быстро спадает к нулю выше ~0.3.
+        new UtilityAction<PawnContext>(
+            "rest",
+            new Consideration<PawnContext>(
+                "tired",
+                c => c.Energy,
+                curve: ResponseCurve.Polynomial(exponent: 3f, slope: -1f, xShift: 1f)
+            )
+        ),
+        // Блуждание — поведение по умолчанию: тем привлекательнее, чем больше сил.
+        new UtilityAction<PawnContext>(
+            "wander",
+            new Consideration<PawnContext>("rested", c => c.Energy)
+        )
+    );
+
+    protected override void OnUpdate()
+    {
+        var delta = Tick.deltaTime;
+        foreach (var (needs, brains, _) in Query.Chunks)
+        {
+            var n = needs.Span;
+            var b = brains.Span;
+            for (var i = 0; i < n.Length; i++)
+            {
+                ref var brain = ref b[i];
+                brain.DecideIn -= delta;
+                if (brain.DecideIn > 0f)
+                {
+                    continue;
+                }
+
+                brain.DecideIn = ReevaluateInterval;
+                var choice = _brain.Select(new PawnContext(n[i].Energy));
+                brain.Action = choice?.Name == "rest" ? PawnAction.Rest : PawnAction.Wander;
+            }
+        }
+    }
+
+    /// <summary>Очки последнего вычисленного выбора, по порядку действий — для дебаг-команды.</summary>
+    public (string Name, float Score)[] Inspect(float energy)
+    {
+        _brain.Select(new PawnContext(energy));
+        var scores = _brain.LastScores;
+        var result = new (string, float)[_brain.Actions.Count];
+        for (var i = 0; i < result.Length; i++)
+        {
+            result[i] = (_brain.Actions[i].Name, scores[i]);
+        }
+
+        return result;
+    }
+}
+
+/// <summary>
+/// Презентация состояния ИИ: уставший житель темнеет (альфа падает с энергией). Система читает
+/// симуляцию и пишет только в <see cref="Sprite"/> — никаких draw-вызовов, граница sim/presentation цела.
+/// </summary>
+public sealed class PawnAppearanceSystem : QuerySystem<PawnNeeds, Sprite>
+{
+    private const float MinBrightness = 0.45f;
+
+    protected override void OnUpdate()
+    {
+        foreach (var (needs, sprites, _) in Query.Chunks)
+        {
+            var n = needs.Span;
+            var s = sprites.Span;
+            for (var i = 0; i < n.Length; i++)
+            {
+                var brightness =
+                    MinBrightness + (1f - MinBrightness) * Math.Clamp(n[i].Energy, 0f, 1f);
+                s[i].Color = Color.White * brightness;
+            }
+        }
+    }
+}
+
+/// <summary>
+/// Расход и восстановление энергии по текущему действию: блуждающий устаёт, отдыхающий
+/// восстанавливается. Скорости подобраны так, что отдых короткий, а блуждание долгое.
+/// </summary>
+public sealed class PawnNeedsSystem : QuerySystem<PawnNeeds, PawnBrain>
+{
+    private const float DrainPerSecond = 0.04f;
+    private const float RegenPerSecond = 0.2f;
+
+    protected override void OnUpdate()
+    {
+        var delta = Tick.deltaTime;
+        foreach (var (needs, brains, _) in Query.Chunks)
+        {
+            var n = needs.Span;
+            var b = brains.Span;
+            for (var i = 0; i < n.Length; i++)
+            {
+                ref var energy = ref n[i].Energy;
+                energy +=
+                    b[i].Action == PawnAction.Rest
+                        ? RegenPerSecond * delta
+                        : -DrainPerSecond * delta;
+                energy = Math.Clamp(energy, 0f, 1f);
+            }
+        }
+    }
+}
@@ -16,9 +16,11 @@ public struct Wander : IComponent

 /// <summary>
 /// Блуждание жителей. Один Random на систему, сид от мира — при одинаковом сиде
-/// и порядке обновления симуляция воспроизводима.
+/// и порядке обновления симуляция воспроизводима. Отдыхающие жители (см.
+/// <see cref="PawnDecisionSystem"/>) стоят на месте — таймер смены направления тоже замирает.
 /// </summary>
-public sealed class WanderSystem(int seed, RectF worldBounds) : QuerySystem<Transform2D, Wander>
+public sealed class WanderSystem(int seed, RectF worldBounds)
+    : QuerySystem<Transform2D, Wander, PawnBrain>
 {
    private const float Speed = 22f;

@@ -27,12 +29,18 @@ public sealed class WanderSystem(int seed, RectF worldBounds) : QuerySystem<Tran
    protected override void OnUpdate()
    {
        var delta = Tick.deltaTime;
-        foreach (var (transforms, wanders, _) in Query.Chunks)
+        foreach (var (transforms, wanders, brains, _) in Query.Chunks)
        {
            var t = transforms.Span;
            var w = wanders.Span;
+            var b = brains.Span;
            for (var i = 0; i < t.Length; i++)
            {
+                if (b[i].Action == PawnAction.Rest)
+                {
+                    continue;
+                }
+
                ref var wander = ref w[i];
                wander.ChangeIn -= delta;
                if (wander.ChangeIn <= 0f)
@@ -65,8 +73,9 @@ public sealed class SeparationSystem(MrGameEng.Collisions.CollisionWorld world)
        {
            ref var ta = ref pair.A.GetComponent<Transform2D>();
            ref var tb = ref pair.B.GetComponent<Transform2D>();
-            var sum = pair.A.GetComponent<MrGameEng.Collisions.Collider>().Radius +
-                      pair.B.GetComponent<MrGameEng.Collisions.Collider>().Radius;
+            var sum =
+                pair.A.GetComponent<MrGameEng.Collisions.Collider>().Radius
+                + pair.B.GetComponent<MrGameEng.Collisions.Collider>().Radius;

            var delta = tb.Position - ta.Position;
            var distance = delta.Length();
@@ -103,7 +112,10 @@ public sealed class SeparationSystem(MrGameEng.Collisions.CollisionWorld world)

 /// <summary>Камера бога: WASD/стрелки — панорамирование, колесо — зум. Молчит, пока открыта консоль.</summary>
 public sealed class GodCameraSystem(
-    Entity cameraEntity, InputManager input, MrGameEng.DevConsole.DevConsole console) : BaseSystem
+    Entity cameraEntity,
+    InputManager input,
+    MrGameEng.DevConsole.DevConsole console
+) : BaseSystem
 {
    protected override void OnUpdateGroup()
    {
@@ -116,7 +128,8 @@ public sealed class GodCameraSystem(

        var pan = new Vector2(
            Axis(input, Keys.A, Keys.Left, Keys.D, Keys.Right),
-            Axis(input, Keys.W, Keys.Up, Keys.S, Keys.Down));
+            Axis(input, Keys.W, Keys.Up, Keys.S, Keys.Down)
+        );
        if (pan != Vector2.Zero)
        {
            pan.Normalize();
@@ -126,9 +139,15 @@ public sealed class GodCameraSystem(
        camera.Zoom = Math.Clamp(camera.Zoom * (1f + input.WheelDelta * 0.001f), 0.4f, 8f);
    }

-    private static float Axis(InputManager input, Keys negativeA, Keys negativeB, Keys positiveA, Keys positiveB) =>
-        (input.IsKeyDown(positiveA) || input.IsKeyDown(positiveB) ? 1f : 0f) -
-        (input.IsKeyDown(negativeA) || input.IsKeyDown(negativeB) ? 1f : 0f);
+    private static float Axis(
+        InputManager input,
+        Keys negativeA,
+        Keys negativeB,
+        Keys positiveA,
+        Keys positiveB
+    ) =>
+        (input.IsKeyDown(positiveA) || input.IsKeyDown(positiveB) ? 1f : 0f)
+        - (input.IsKeyDown(negativeA) || input.IsKeyDown(negativeB) ? 1f : 0f);
 }

 /// <summary>
@@ -141,7 +160,8 @@ public sealed class HudSystem(
    Myra.Graphics2D.UI.Label label,
    string titleKey,
    int seed,
-    int population) : BaseSystem
+    int population
+) : BaseSystem
 {
    private float _accumulated;
    private int _frames;
@@ -158,6 +178,9 @@ public sealed class HudSystem(
        var fps = (int)MathF.Round(_frames / _accumulated);
        _accumulated = 0f;
        _frames = 0;
-        label.Text = languages.Format(titleKey, seed, population, fps) + "\n" + languages.Get("hud.controls");
+        label.Text =
+            languages.Format(titleKey, seed, population, fps)
+            + "\n"
+            + languages.Get("hud.controls");
    }
 }