Updating the OP2MissionSDK and LevelTemplate for VS2026

[Vagabond]

I spent time updating the OP2MissionSDK and Level Template on GitHub. These are the traditional C++ libraries for creating a mission. Of note, there is a newer C++ API known as TethysAPI that may be used in lieu of OP2MissionSDK or complement it. TethysAPI may be found here: https://github.com/OutpostUniverse/TethysAPI

The OP2MissionSDK may be found here: https://github.com/OutpostUniverse/OP2MissionSDK
The Level Template may be found here: https://github.com/OutpostUniverse/LevelTemplate

If you are new to making missions, Sirbomber has an excellent tutorial series that may be found in the forums.

I bumped the version to 5.0.0 with the below changes. The biggest reason for this release was to make everything work 'out of the box' with a stock Visual Studio 2026 install. Some other minor changes are included.

There are other ways to create custom missions for Outpost 2, but I think this SDK remains the most flexible, but with the downside of requiring learning C++ if you are not already familiar with the language.

Also, I added a reference in the readme to TethysAPI in case someone wants to check it out, but stopped short of adding it as a Git submodule.


Version 5.0.0
Version 5.0.0 updates OP2MissionSDK to default to Visual Studio 2026 and its toolset (v145). A new feature in HFL and some minor documentation corrections are included. Automated server builds were updated to use GitHub actions instead of appveyor. A breaking change occurred in OP2Helper correcting the name of an enum ID.

Outpost2DLL

• Update to Visual Studio 2026 build tools (v145)
• Automated build switched from appveyor to GitHub actions
• Minor updates to source code documentation

OP2Helper

• Update to Visual Studio 2026 build tools (v145)
• Automated build switched from appveyor to GitHub actions
• Correct EnumTechID enum identifier spelling of defensive (Breaking Change to API)
• Correct common metals evacuation victory message text
• Create helper functions to ease creation of map beacons (common ore, rare ore, fumaroles, and magma vents)
• Minor updates to source code documentation

HFL

• Add DoCargoRoute routine
• Update to Visual Studio 2026 build tools (v145)
• Minor updates to source code documentation