init

.gitignore

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+.config/
+.vscode/
+src/bin
+src/**/obj

plan.md

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+### Network Engineering Simulator - Pseudocode Specification  
+```plaintext
+// GLOBAL STATE  
+world: 3D voxel space (solid/air)  
+devices: List<Device> = []  
+connections: List<Connection> = []  
+credits: int = 0  
+technicians: List<Bot> = [free_starter_bot]  
+
+// DEVICE TYPES  
+struct Framework:  
+  id: IP_address (A.B.C.D where 0≤A,B,C,D≤3)  
+  packet_gen_rate: float  // packets/sec  
+
+struct Router:  
+  ports: [Device|null, Device|null]  
+
+struct Hub:  
+  ports: [Device|null, Device|null, Device|null]  
+  rotation: enum{ CLOCKWISE, COUNTERCLOCKWISE }  
+  active_port: int (0,1,2)  
+
+// ECONOMY  
+shop_items = {  
+  "cable": {cost:1, qty:20},  
+  "router": {cost:2, qty:1},  
+  "hub": {cost:10, qty:1},  
+  "technician": {cost:10000, qty:1},  
+  "drill_fuel": {cost:20, qty:100}  
+}  
+
+// CONSTRUCTION SYSTEM  
+function toggle_networking_mode(enabled):  
+  if enabled:  
+    use_technician_bots()  
+  else:  
+    free_instant_build()  
+
+function place_device(type, position):  
+  if networking_mode:  
+    assign_to_technician(type, position)  
+  else:  
+    spawn_device(type, position)  
+
+function drill_volume(start, end):  
+  blocks = calculate_blocks(start, end)  
+  if networking_mode:  
+    consume_fuel(blocks)  
+    technician.drill(start, end)  
+  else:  
+    instant_clear_volume(start, end)  
+
+function create_connection(devA, devB):  
+  distance = distance(devA.pos, devB.pos)  
+  cable_cost = ceil(distance / 3.0)  
+  if credits < cable_cost: return FAIL  
+  
+  // Ray collision check (ignore shared planes)  
+  if has_collision(devA.pos, devB.pos): return FAIL  
+  
+  credits -= cable_cost  
+  connection = new Connection(devA, devB, cable_cost)  
+  connections.add(connection)  
+
+// HUB MANAGEMENT  
+function connect_to_hub(device, hub, port_index):  
+  hub.ports[port_index] = device  
+  create_connection(device, hub)  
+
+function rotate_hubs():  // Called every second  
+  for hub in all_hubs:  
+    if hub.rotation == CLOCKWISE:  
+      hub.active_port = (hub.active_port + 1) % 3  
+    else:  
+      hub.active_port = (hub.active_port - 1) % 3  
+
+// PACKET SYSTEM  
+function generate_packets():  
+  for framework in all_frameworks:  
+    dest = random_valid_ip()  
+    spawn_packet(framework, dest)  
+
+function route_packets():  // Called every second  
+  for packet in all_packets:  
+    current = packet.current_device  
+    next = get_next_hop(current, packet.dest)  
+    packet.hops += connection_cost(current, next)  
+    packet.move_to(next)  
+
+// ECONOMY & UI  
+function free_money_button():  
+  if credits < 10:  
+    credits += 100  
+
+function calculate_earnings():  
+  for packet in delivered_packets:  
+    credits += BASE_REWARD * packet.hops  
+
+// MAIN GAME LOOP  
+every_frame:  
+  handle_player_input()  
+  render_world()  
+
+every_second:  
+  generate_packets()  
+  route_packets()  
+  calculate_earnings()  
+  rotate_hubs()  
+```  
+
+### Key Constants  
+```plaintext  
+BASE_REWARD = 1.0  // Credit per hop  
+IP_RANGE = [0,1,2,3]  // Valid IP digits  
+```  
+
+### Simplified Device Behavior  
+```plaintext  
+Router:  
+  Input → Output (direct passthrough)  
+
+Hub:  
+  Always routes to active_port  
+  Port rotation occurs AFTER packet transfer  
+
+Connection:  
+  Cost = ceil(distance/3)  
+  Each connection adds 'cost' hops to packets  
+```  
+
+### Input Handling Pseudocode  
+```plaintext  
+on_mouse_click:  
+  if in_build_mode:  
+    place_device(selected_type, world_position)  
+    
+  if in_drill_mode:  
+    drill_volume(selection_start, selection_end)  
+    
+  if in_connect_mode:  
+    create_connection(selected_device1, selected_device2)  
+    
+  if ui_element_clicked("free_money"):  
+    free_money_button()  
+```  
+
+### Collision Detection  
+```plaintext  
+function has_collision(posA, posB):  
+  // Ignore collisions on shared planes  
+  if same_x_plane(posA, posB): ignore YZ  
+  if same_y_plane(posA, posB): ignore XZ  
+  if same_z_plane(posA, posB): ignore XY  
+  
+  return raycast(posA, posB) hits non-device solid  
+```  
+
+This specification contains all mechanics in condensed pseudocode format, covering:  
+- IP-based routing (0-3 digits)  
+- Cable cost/distance formula  
+- 1-second packet synchronization  
+- Networking mode toggle  
+- Collision-aware connections  
+- Hop-based economy  
+- Free money condition  
+- Device placement logic  
+- Hub rotation system

src/Content/Content.mgcb

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+
+#----------------------------- Global Properties ----------------------------#
+
+/outputDir:bin/$(Platform)
+/intermediateDir:obj/$(Platform)
+/platform:DesktopGL
+/config:
+/profile:Reach
+/compress:False
+
+#-------------------------------- References --------------------------------#
+
+
+#---------------------------------- Content ---------------------------------#
+

src/Game1.cs

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+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using Microsoft.Xna.Framework.Input;
+
+namespace tunnet;
+
+public class Game1 : Game
+{
+    private GraphicsDeviceManager _graphics;
+    private SpriteBatch _spriteBatch;
+
+    public Game1()
+    {
+        _graphics = new GraphicsDeviceManager(this);
+        Content.RootDirectory = "Content";
+        IsMouseVisible = true;
+    }
+
+    protected override void Initialize()
+    {
+        // TODO: Add your initialization logic here
+
+        base.Initialize();
+    }
+
+    protected override void LoadContent()
+    {
+        _spriteBatch = new SpriteBatch(GraphicsDevice);
+
+        // TODO: use this.Content to load your game content here
+    }
+
+    protected override void Update(GameTime gameTime)
+    {
+        if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Escape))
+            Exit();
+
+        // TODO: Add your update logic here
+
+        base.Update(gameTime);
+    }
+
+    protected override void Draw(GameTime gameTime)
+    {
+        GraphicsDevice.Clear(Color.CornflowerBlue);
+
+        // TODO: Add your drawing code here
+
+        base.Draw(gameTime);
+    }
+}

src/Program.cs

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+using var game = new tunnet.Game1();
+game.Run();

src/app.manifest

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+<?xml version="1.0" encoding="utf-8"?>
+<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">
+  <assemblyIdentity version="1.0.0.0" name="tunnet"/>
+  <trustInfo xmlns="urn:schemas-microsoft-com:asm.v2">
+    <security>
+      <requestedPrivileges xmlns="urn:schemas-microsoft-com:asm.v3">
+        <requestedExecutionLevel  level="asInvoker" uiAccess="false" />
+      </requestedPrivileges>
+    </security>
+  </trustInfo>
+
+  <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+    <application>
+      <!-- A list of the Windows versions that this application has been tested on and is
+           is designed to work with. Uncomment the appropriate elements and Windows will 
+           automatically selected the most compatible environment. -->
+
+      <!-- Windows Vista -->
+      <supportedOS Id="{e2011457-1546-43c5-a5fe-008deee3d3f0}" />
+
+      <!-- Windows 7 -->
+      <supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}" />
+
+      <!-- Windows 8 -->
+      <supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}" />
+
+      <!-- Windows 8.1 -->
+      <supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}" />
+
+      <!-- Windows 10 -->
+      <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}" />
+
+    </application>
+  </compatibility>
+
+  <application xmlns="urn:schemas-microsoft-com:asm.v3">
+    <windowsSettings>
+      <dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">true/pm</dpiAware>
+      <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">permonitorv2,permonitor</dpiAwareness>
+    </windowsSettings>
+  </application>
+
+</assembly>

src/tunnet.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RollForward>Major</RollForward>
+    <PublishReadyToRun>false</PublishReadyToRun>
+    <TieredCompilation>false</TieredCompilation>
+  </PropertyGroup>
+  <PropertyGroup>
+    <ApplicationManifest>app.manifest</ApplicationManifest>
+    <ApplicationIcon>Icon.ico</ApplicationIcon>
+  </PropertyGroup>
+  <ItemGroup>
+    <None Remove="Icon.ico" />
+    <None Remove="Icon.bmp" />
+  </ItemGroup>
+  <ItemGroup>
+    <EmbeddedResource Include="Icon.ico">
+      <LogicalName>Icon.ico</LogicalName>
+    </EmbeddedResource>
+    <EmbeddedResource Include="Icon.bmp">
+      <LogicalName>Icon.bmp</LogicalName>
+    </EmbeddedResource>
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="MonoGame.Framework.DesktopGL" Version="3.8.*" />
+    <PackageReference Include="MonoGame.Content.Builder.Task" Version="3.8.*" />
+  </ItemGroup>
+  <Target Name="RestoreDotnetTools" BeforeTargets="CollectPackageReferences">
+    <Message Text="Restoring dotnet tools (this might take a while depending on your internet speed and should only happen upon building your project for the first time, or after upgrading MonoGame, or clearing your nuget cache)" Importance="High" />
+    <Exec Command="dotnet tool restore" />
+  </Target>
+</Project>

tunnet.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.31903.59
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "tunnet", "src/tunnet.csproj", "{728D0B55-232F-4C2B-A31F-04EA4BFF4209}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{728D0B55-232F-4C2B-A31F-04EA4BFF4209}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{728D0B55-232F-4C2B-A31F-04EA4BFF4209}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{728D0B55-232F-4C2B-A31F-04EA4BFF4209}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{728D0B55-232F-4C2B-A31F-04EA4BFF4209}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal