Floating Car

[Kurtt420 10]

Anyone know what's causing this?

http://i.imgur.com/Dm0atdG.jpg (248 kB)

I tried fixing all the memory LODs and the LandContact, nothing seems to help.

[Yano 18]

Try to check wheels in Geometry lod (not PhysX) and "wheel_X_Y_bound" points in Memory LOD which represents wheel radius.

https://community.bistudio.com/wiki/Arma_3_Cars_Config_Guidlines#Model_requirements_.7Bp3d.7D

[Kurtt420 10]

Thank you! I also tweaked the physx config so it pretty much fixed it. Thank you :)

[Chairborne 2594]

Sorry for bringing this up again after so much time.

When you were talking about wheels in geometry LOD, do they need particular characteristics? Like a certain size or distance to the wheel bounds? Or do they need to overlap?

I'm having the same problem but have not been able to solve it so far.

[Varanon 892]

These problems typically appear when the sprungMass, springStrength and springDamperRate are incorrect. Incorrect means, the springMass is not a quarter of the vehicle mass as it is defined in the geometry lod.

Check the total mass in the geometry lod, divide it by the amount of wheels and set this as sprungMass for the appropriate wheels, then compute springStrength and springDamperRate from there on.

This always fixed the floating wheel problems for me

[Chairborne 2594]

Does the wheel mass need to be equivalent to the wheel mass in the geometry LOD?

[Varanon 892]

Does the wheel mass need to be equivalent to the wheel mass in the geometry LOD?

No, set the wheel mass to something appropriate, like 20. I'd also suggest making all components of the geometry lod 0 weight, but add "weights" to the Gemoetry lod that contain the actual weight. Check how the Test Car from the samples package defines it's weight. This allows you a better control of the center of weight for the car.

[Chairborne 2594]

Yes i noticed, as a matter of fact it's one of the first things i did since all sample vehicles share that. :)

I'm porting a wheeled APC so i guess it's reasonable for the wheels to weight something more (the vehicle itself is around 13 tons).

I'll try what you suggested but the first time it wasn't really a success.

Thanks for your time anyway. :rolleyes:

[Varanon 892]

Yes i noticed, as a matter of fact it's one of the first things i did since all sample vehicles share that. :)

I'm porting a wheeled APC so i guess it's reasonable for the wheels to weight something more (the vehicle itself is around 13 tons).

I'll try what you suggested but the first time it wasn't really a success.

Thanks for your time anyway. :rolleyes:

If you're porting Arma 2 assets, I suggest you check out CUP (see my signature)!

[Chairborne 2594]

I recalculated again all the data for sprungmass and so on and the vehicle is still floating.

The vehicle behaves somewhat correctly, it just sits 40cm above the ground.

I'm starting to think the problem might be in the damper animations in the model.cfg or in the p3d, even though i did everything by the book. :confused:

EDIT: as a matter of fact, a few strings in the model.cfg were wrong. After i fixed them the vehicle is now ALMOST aligned to the ground, it still sits 5cm off the ground and in tight turns the wheels go below the ground. I feel victory is near. :cool:

Edited April 28, 2014 by Chairborne

[npmproductions13 14]

Sorry to revive an old thread im now having the exact same problem how did you fix it if you wouldn't mind sharing that information.

[soldierman 16]

Make sure your Geometry LOD is correct. Easiest way is to select one of the objects and make it a component convex hull. Then make sure your LandContact LOD is correct. If that doesn't do it, check your RPT to see if its giving you any warnings. To see correct versions of these LODs refer to the sample models

[npmproductions13 14]

I've fixed this issue by editing the Memory LOD Bound axis (Moving it up). And edited the sprungMass , springStrength , springDamperRate