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MSFS20 How do I actually produce a "MSFS WASM Module", install it, get it loaded, and debug it?

tml

tml

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finland
New and clean machine, VS2019 (Community Edition), MSFS2020, and the current MSFS SDK installed. In VS2019: Create a new project. Use template "MSFS WASM Module", call it "T1". Create it in C:\Users\tml\src\T1. Build > Build Solution. "Build: 1 succeeded, 0 failed, 0 up-to-date, 0 skipped." I end up with these files in the project's (not solution's) output folder (C:\Users\tml\src\T1\T1\MSFS\Debug): T1.Build.CppClean.log, T1.log, T1.obj, T1.tlog, T1.vcxproj.FileListAbsolute.txt, and T1.wasm.recipe.

No .wasm file. And even if there was, what am I supposed to do with it, to get MSFS to load it at run-time? And what is a .wasm.recipe file? It contains:

<?xml version="1.0" encoding="utf-8"?>
<Project>
<ProjectOutputs>C:\Users\tml\src\T1\MSFS\Debug\T1.wasm</ProjectOutputs>
<ContentFiles></ContentFiles>
<SatelliteDlls></SatelliteDlls>
<NonRecipeFileRefs></NonRecipeFileRefs>
</Project>

Note that it says the T1.wasm would be in the solution's MSFS\Debug folder, but that one is empty.

--tml
 
Last edited:
Ha! I had to change the "Configuration Type" for the project from "WasmModule" to "<Inherit from parent or project defaults>". Then the type changes to "WASM Module (.wasm)." Then building it did produce a .wasm file in the solution's MSFS\Debug folder. Now I just need to figure out what surrounding boilerplate is needed to make MSFS actually use it.

--tml
 
Eventually, I did manage to build the GaugeAircraft sample, built it in VS, then in MSFS's Dev Mode, and I did end up with an aircraft I could load in MSFS, and when I then attached the MSFS process in VS, I could set breakpoints in the C++ code of GaugeAircraft (which had been compiled to WASM, and then JITted by MSFS's built-in web engine), yay!

--tml
 
I'd ask if you'd care to share the steps you took to get there, but I'm not there yet to the point of building aircraft. Others might like to know, though.
 
Budlab said:
I would like to see real WASM code and compare it to VB and VBA code.
Click to expand...
WASM is like machine code, not like VB or VBA at all. And in the MSFS context, the language that you compile to WASM is C++.
 
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