Question Collision detection

[jedidia]

It seems to me the two of you are talking about two different problems. As far as I gather from dombo2007's post, he solved the freezing problem:

If the DG is sitting then it stays sitting at 10000x.

What he seems to have trouble with is moving an object along the terrain at high time accel.

dumbo2007 seems to think that you are talking about detecting the collision at high time acceleration, not about freezing vessels that already "collided", so to speak...

 

[dumbo2007]

Yeah thats right, if a vessel is landed then it will stay landed at high time accelerations. Bullet does not apply any forces on it or alter any state vectors that causes it to be shot into space.

For a vehicle moving across the terrain, I ignore time accelerations beyond 10x because bullet can handle upto 10x accelerations. Maybe more I haven't tried. Or I just increase the number of physics iterations.

 

[Artlav]

Yeah thats right, if a vessel is landed then it will stay landed at high time accelerations. Bullet does not apply any forces on it or alter any state vectors that causes it to be shot into space.

That's good. The question i'm driving at is - how is it done?
The vessel is above the sphere, landed on the terrain, what makes it stay up?

Attachment points?
Extending touchdown points all the way to the surface?
Something else?

 

[dumbo2007]

Attachment points. I don't see any other way at the moment.

 

[Artlav]

Nice.
Well, good luck.
Orbiter do need working collisions at last.

 

[Tschachim]

Hi Artlav,

...
MoonLand:
http://www.ibiblio.org/mscorbit/mscforum/index.php?topic=1962.0
...

By the way, MoonLand isn't working with Orbiter 2010-P1 as denoted in the last post of the thread you linked. Any chance to get a rebuild/version working with 2010-P1?

Cheers
Tschachim

 

[BruceJohnJennerLawso]

With regards to surface Physics, I was wondering if there is anything that addon devs could include in their vessel code to support Bullet-collisions or will that be generic? I dont mind putting in the extra time if it means I can help with getting Orbiter collision detection working

 

[jarmonik]

Seeing that he is updating the ground collision model quite a bit currently, it might be possible that he intends to adapt it to be used with terrain, especially as he himself suggested a further separation of graphics client and terrain client.

Suggested ? Terrain client ? Well, I haven't heard.

 

[Xyon]

That's in the "Orbiter Dynamics News" thread. Well worth a peek.