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Crocket avatar image
Crocket asked FlyingRaccoon answered

Ground collision SDK support for advanced tilting gear physics

Hi there,

We are doing some research about how tilting gear system can be properly physically implemented, and not just merged into gear animation position.

We would need possibility to query height over ground for any point of the plane (wheels of a gear bogey in that case).

Current workaround is using standard datum reference point height query and do an inverse rotation using plane attitude.

This method works, but it misses ground slope effect.

Question:

-Is there a way to directly query the actual height over ground mesh of any point of the plane?

-If not: can it be considered? OR, is there a way to query the ground slope under the plane to make the current workaround better ?


Thanks a lot!

aircraftanimation
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3 Answers

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Flysimware avatar image
Flysimware answered

This topic reminds me when we did testing to see if we could have a failed gear be lowered by a pump and what would happen if you did not lower the gear all the way. The result we found is the sim can only detect the gear up or down and nothing in between. So did not matter what you animate this is something you have to understand.

When you say query the planes height above mesh that would be the AGL so yes there is a variable for that. But what the sim detects is the contact scrape points. Where you set these defines what will scrape when the gear is not present.

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Crocket avatar image
Crocket answered Crocket edited

No I mean I have already a working method independant on the gear state to detect any point of the plane height.

Roughly it's Point_height = plane_height - local_plane_point_coordinate * Plane_attitude_inv_rotation.

This works perfectly on ground. Only thing missing is the ground slope that can affect the result as this assumes perfectly horizontal ground.


https://streamable.com/02zelj


We all know everyone will try to land this bird on Courchevel and it will look wierd :D


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FlyingRaccoon avatar image
FlyingRaccoon answered

Hello @Crocket

I can't think of a way to get this information from the SDK in its current state.
You want to create an idea for this so it has a chance to be reviewed when we will find some time for our next ideas review.

Regards,
Sylvain

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