update servicepoint and README
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README.md
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README.md
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# CCCB-Tanks
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# servicepoint-tanks
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<!-- TODO: image -->
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## Service point display
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<!-- TODO: image -->
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In CCCB, there is a big pixel matrix hanging on the wall. It is called "Airport Display" or "Service Point Display".
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- Resolution: 352x160=56,320 pixels
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- Pixels are grouped into 44x20=880 tiles (8x8=64 pixels each)
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- Smallest addressable unit: row of pixels inside of a tile (8 pixels = 1 byte)
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- The brightness can only be set per tile
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- Screen content can be changed using a simple UDP protocol
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- Between each row of tiles, there is a gap of around 4 pixels size. This gap changes the aspect ratio of the display.
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### Binary format
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A UDP package sent to the display has a header size of 10 bytes.
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Each header value has a size of two bytes (unsigned 16 bit integer).
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Depending on the command, there can be a payload following the header.
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The commands are implemented in DisplayCommands.
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To change screen contents, these commands are the most relevant:
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1. Clear screen
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- command: `0x0002`
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- (rest does not matter)
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2. Send CP437 data: render specified text into rectangular region
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- command: `0x0003`
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- top left tile x
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- top left tile y
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- width in tiles
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- height in tiles
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- payload: (width in tiles * height in tiles) bytes
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- 1 byte = 1 character
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- each character is rendered into one tile (mono-spaced)
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- characters are encoded using code page 437
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3. Send bitmap window: set pixel states for a rectangular region
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- command: `0x0013`
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- top left tile x
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- top left _pixel_ y
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- width in tiles
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- height in _pixels_
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- payload: (width in tiles * height in pixels) bytes
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- network byte order
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- 1 bit = 1 pixel
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There are other commands implemented as well, e.g. for changing the brightness.
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## Tanks game
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- By default, the backend also hosts the frontend
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### Backend
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<!-- TODO: image -->
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- Uses the C# bindings from the [servicepoint library](https://github.com/cccb/servicepoint/) for communication with the display.
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- Stack: .NET / C# / ASP.NET / AOT-compiled
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- Both traditional JSON over HTTP APIs and real-time WebSocket communication
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- runs all game logic
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@ -66,6 +16,7 @@ There are other commands implemented as well, e.g. for changing the brightness.
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- One frame is ~7KB, not including the text and player specific data
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- maps can be loaded from png files containing black and white pixels or simple text files
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- some values (like tank speed) can be configured but are fixed at run time
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- By default, the backend also hosts the frontend
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### Frontend
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@ -7,7 +7,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "shared", "shared", "{12DB7D
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Dockerfile = Dockerfile
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EndProjectSection
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ServicePoint2", "servicepoint\servicepoint2-binding-cs\src\ServicePoint2.csproj", "{DFCC69ED-E02B-4631-8A23-5D394BA01E03}"
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ServicePoint", "servicepoint/crates/servicepoint_binding_cs/ServicePoint/ServicePoint.csproj", "{DFCC69ED-E02B-4631-8A23-5D394BA01E03}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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@ -7,7 +7,7 @@ using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.Http.HttpResults;
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using Microsoft.AspNetCore.Mvc;
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using Microsoft.Extensions.Diagnostics.HealthChecks;
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using ServicePoint2;
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using ServicePoint;
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using TanksServer.GameLogic;
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using TanksServer.Interactivity;
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@ -1,7 +1,7 @@
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using System.Diagnostics;
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using System.Diagnostics.CodeAnalysis;
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using System.IO;
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using ServicePoint2;
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using ServicePoint;
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using TanksServer.Graphics;
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namespace TanksServer.GameLogic;
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@ -1,4 +1,4 @@
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using ServicePoint2;
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using ServicePoint;
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using TanksServer.GameLogic;
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namespace TanksServer.Graphics;
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@ -1,4 +1,4 @@
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using ServicePoint2;
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using ServicePoint;
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using TanksServer.GameLogic;
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using TanksServer.Interactivity;
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@ -1,4 +1,4 @@
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using ServicePoint2;
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using ServicePoint;
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namespace TanksServer.Graphics;
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@ -1,5 +1,5 @@
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using System.Net.WebSockets;
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using ServicePoint2;
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using ServicePoint;
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using TanksServer.Graphics;
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namespace TanksServer.Interactivity;
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@ -1,6 +1,6 @@
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using System.Buffers;
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using System.Net.WebSockets;
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using ServicePoint2;
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using ServicePoint;
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using TanksServer.Graphics;
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namespace TanksServer.Interactivity;
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@ -1,10 +1,10 @@
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using System.Diagnostics;
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using System.Net;
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using System.Net.Sockets;
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using ServicePoint2;
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using ServicePoint;
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using TanksServer.GameLogic;
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using TanksServer.Graphics;
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using CompressionCode = ServicePoint2.BindGen.CompressionCode;
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using CompressionCode = ServicePoint.BindGen.CompressionCode;
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namespace TanksServer.Interactivity;
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@ -2,7 +2,7 @@ using System.IO;
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using Microsoft.AspNetCore.Builder;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.FileProviders;
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using ServicePoint2;
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using ServicePoint;
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using SixLabors.ImageSharp;
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using TanksServer.GameLogic;
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using TanksServer.Graphics;
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@ -29,7 +29,7 @@
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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\servicepoint\servicepoint2-binding-cs\src\ServicePoint2.csproj" />
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<ProjectReference Include="..\servicepoint\crates\servicepoint_binding_cs\ServicePoint\ServicePoint.csproj" />
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</ItemGroup>
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</Project>
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@ -1 +1 @@
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Subproject commit 548c957bf476471f81c5e8743671fd0f5a95a108
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Subproject commit 8bf1452e31c4dc14635c783987288111ebe5dce3
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