2 hours ago, virtuali said:

True but, he was referring mainly to the Flight modeling.

Don't know if Fenix has a custom flight model that runs externally too, or it's just for system modeling, but regarding the flight model, the only simulator that is designed to have its flight model driven by a custom simulation, which can be either internal or external, is P3D, which has several features to deal with that, such as the External Sim feature ( now deprecated in favor of the SimObject API, but still available ), the ability to create a completely new SimObject class driven by fully custom code without using an external module, so it's very high performing ( the SimObject API ), and the special "Syncronous Simconnect" calls, that can be used to be sure your code is synchronized with the simulation, which of course means you can slow down the whole sim if you are not careful.

None of this is available in MSFS, which doesn't make exactly easy to replace the Flight model.

There has been some discussion on the MSFS developers forum, here:

https://devsupport.flightsimulator.com/questions/3955/wasm-flight-model-replacing-game-flight-model.html

the topic is clearly important to many 3rd party developers and, the last reply from Asobo was:

The whole thread started because it was noted the Volocopter uses a WASM module using Simconnect for its custom flight model so, later replies from Eric (developer at Asobo), was that, when saying "It might not be future-proof", he was referring to external .EXE replacing flight model through Simconnect, now WASM modules.

So, right now, the custom flight model situation, according to Asobo, is as follows:

- There's no officially supported method to replace the flight model. But this might change at any time in the future.

- Some developers did that through Simconnect, but it's considered as a workaround and, not future-proof if done through external .EXE

- Asobo themselves used a custom flight model in the Volocopter, by means of a WASM module, also using Simconnect.

So, it's not entirely clear why the distinction between an external EXE using Simconnect to replace the flight model vs a WASM module. It is likely because they know WASM, running inside the sim, might have less overhead and less synchronization issues compared to an external .EXE, but that's just a guess.

. @virtuali Thanks for letting me know!  If a 3rd party developer would like more control over the flight model, especially official support for a custom flight model in MSFS, but don't want to directly push Asobo to do it, they can PM me the writeup to support a custom flight model, and for the next Twitch Q&A, I can post a topic with the writeup to be upvoted in the official MSFS forums and keep the 3rd party dev's identity anonymous, so that your identity as a 3rd party is protected.

Alternatively, since I see a lot of posts in that developer thread already, and those comments are already made public by various developers, so maybe I will just quote one of the developers in that post 😄.

Edited May 23, 20224 yr by abrams_tank

@virtuali, thanks for your insight !

I was actually on those threads at the MFS Official Forums, and btw, Fénix is using the native MFS FM.

P3D is ahead in this aspect of course. It's because of that that it can easily serve as a visuals simuator for ELITE IFT and other professional simulation platforms.

It would be great to have this feature in MFS too, as well as in X-Plane. 

For those o can no longer live without MFS Scenery ( not totally my case ) , but do prefer X-Plane Flight Dynamics ( totally my case ) it would be great to be able to use X-Plane 12 flight dynamics with MFS visuals through a bridge app, preferably allowing for different sorts of communication / sync channels between the two simulators ( Scenery Server and Simulation Host ) for instance when it comes to weather and or AI traffic / ATC.

When sometime ago A2A wrote something about MFS I got the idea that they had finally sorted out how to make Accusim run in MFS. Maybe their first MFS addon will use this approach, of a totally or partially external FM ( ? )

Time will tell....

Edited May 23, 20224 yr by jcomm