FastVesselChanger

A minimal Kerbal Space Program camera toggle plugin in C#.

Prerequisites

This project uses KSPBuildTools to automatically manage KSP DLLs and plugin packaging.

Setup KSP Installation Path

Before building, you must configure your KSP installation path:

1. Option A: Using csproj.user file (Recommended)

   • Copy FastVesselChanger.csproj.user.example to FastVesselChanger.csproj.user
   • Edit the .csproj.user file and set KSPBT_GameRoot to your KSP installation directory (the one containing GameData)
   • Example: C:\Games\KSP_1.12.5 or D:\SteamLibrary\steamapps\common\Kerbal Space Program

2. Option B: Environment Variable

   • Set environment variable: KSPBT_GameRoot=C:\Path\To\KSP

3. Option C: Command Line

   Build\build.bat Release x64

Build

Build using the .NET CLI or Visual Studio:

# Using batch script
Build\build.bat Release x64

# Using dotnet CLI
dotnet build FastVesselChanger.sln -c Release -f net472

# Open in Visual Studio 2026 and build normally

The compiled DLL will be automatically placed in: GameData/FastVesselChanger/Plugins/

Install

Copy the entire GameData/FastVesselChanger folder with the built DLL into your KSP installation's GameData directory.

Usage

• Toggle Key: / (forward slash) - press in-flight to toggle the UI window
• Auto-Switch: Enable automatic cycling through selected vessels at a configurable interval
• Vessel Selection: Check/uncheck vessels in the UI to include them in the cycle
• Type Filter: Filter vessels by type (Ship, Station, Probe, Lander, Rover, Plane, Debris, etc.)
• Window State: The UI remembers whether it was open or closed when you close/open your save
• Local UI Preferences: Window position, filter panel state, and active vessel type filters are stored in the XML prefs file

Multi-Player Support (LunaMultiplayer)

This mod is fully compatible with LunaMultiplayer servers. Each player has completely separate settings:

• Each player's vessel selections are independent
• Window state is remembered per player
• Auto-switch intervals are per-player
• Type filters are per-player

Development

This project uses:

• KSPBuildTools 1.1.1 - Automatic KSP DLL management
• .NET Framework 4.7.2 - Target framework
• Visual Studio 2026 (v18+) - Recommended IDE
• Modern SDK-style project format - No hardcoded references

For more information:

• KSPBuildTools Documentation

License

MIT