"Cause the actual patch is way different" // Then the demo will lose the publishers many sales ...
"You're writing your own helicopter simulator?" // Yes, using XNA, I have done global terrain, fully articulated Apache model, clouds, trees, oceans
actually I started it because on the DCS forums they say that Black Shark uses realtime finite element analysis for the flight model and to that I say "yarbles"
I don't have a degree and I learnt maths and physics off Wikipedia yet I can program a working flight model on par with Black Shark in about 2 hours, I know because I did already.
For ground effects / turbulence from buildings / vortex ring and low speed you just chuck in a few extra forces ...
What is it you were hoping to get from the game?
Well I enjoy the sensation of flying, I like to feel the aircraft around me, as an extension of my body, I like both high speed low-flying (taking risks) and just enjoying good speed control and balanced turns etc.
The helicopter sims that feel good to me include: Black Shark, Battlefield 3, GTA:SA (mostly because the hunter missions are incredibly entertaining rather than the flight model itself), GTA4 (flying under the bridges)
I don't care for "reality" that much.
In fact a good simulation has to depart from reality to make it *feel* real, if you just copy reality it won't feel real ... something most flight simmers don't appreciate.
A good example of this would be the size of a door in a 3D video game ... they are 4 times bigger than a real door, but seem kind of normal in-game.
So the game concept is good, but the end result is not entertaining - the missions are dull and the helicopters feel like they are made of ... triangles!
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Here some screenshots I have lying around.
In the game you are a chopper pilot working for a 1984-esque dictatorship.
Your job is to keep the population under control, quell riots, perform assassinations, hunt people down and spy on people.
So lots of excuses for entertaining flying and playing with apache-toys!
I am working on urban environments now using a raytracing trick to draw a skyscraper with 100s of rooms with only 10 triangles.