stack decouplers hollow?

[Leafbaron]

1 hour ago, sal_vager said:

Hi Leafbaron, stack decouplers are deliberately not hollow, they just look that way.

To have hollow objects in Unity you need multiple colliders per object, as colliders have to be convex.

Multiple colliders on a model affect performance, as anyone using large numbers of Structural Fuselages will be able to tell you, it uses several colliders to make it hollow, but using too many affects performance in KSP.

Hope this helps.

Sal, Thank you for your reply! I was trying to make a bushing using stack decouplers with an I-beam in the middle for a stock suspension and couldn't figure out why it just kept exploding after decoupling or just popping out. 

[Azimech]

On 12-1-2017 at 8:45 PM, sal_vager said:

Hi Leafbaron, stack decouplers are deliberately not hollow, they just look that way.

To have hollow objects in Unity you need multiple colliders per object, as colliders have to be convex.

Multiple colliders on a model affect performance, as anyone using large numbers of Structural Fuselages will be able to tell you, it uses several colliders to make it hollow, but using too many affects performance in KSP.

Hope this helps.

Ah ... that explains why building a 300 meter multi-deck aircraft carrier out of MK3 cargo bays proved to be a bad idea.

[sal_vager]

32 minutes ago, Azimech said:

Ah ... that explains why building a 300 meter multi-deck aircraft carrier out of MK3 cargo bays proved to be a bad idea.

Ahh yeah, they have a few colliders too, it's the only way to make them hollow.

[omelaw]

16 hours ago, sal_vager said:

Ahh yeah, they have a few colliders too, it's the only way to make them hollow.

maybe we can run away it with 4 colliders if we made it rectanglar shape

P.S:  is this the reason Mk3 parts has flat sides? to reduce the number of colliders?

Edited January 15, 2017 by omelaw

[sal_vager]

3 hours ago, omelaw said:

maybe we can run away it with 4 colliders if we made it rectanglar shape

P.S:  is this the reason Mk3 parts has flat sides? to reduce the number of colliders?

The fewer you have the less well defined the shape can be, and the flat sides on the Mk3 is because it's cool

[Sharpy]

12 mesh colliders on the MK1 fuselage. 1 on decoupler.

[Azimech]

Next question: would someone be interested in hollow decouplers? Because it's very easy to make them. Five minutes of making a config file, maybe 10 minutes of testing.

[HalcyonSon]

On 1/12/2017 at 11:34 AM, Tex_NL said:

Looks like they are solid.

Come on people. Experiments like this are as easy as it can possibly be. Actually typing this post takes longer.

 

On 1/12/2017 at 11:36 AM, klesh said:

Edit:  No need to drop them, just decouple them from atop a pole.

I'm surprised anyone NEEDED to test it.  I've burned up many a first stage decoupler with second stage engine exhaust.  The exhaust appeared to through the middle, but the heat definitely transferred.

On 1/12/2017 at 11:41 AM, Tex_NL said:

Try some ladders on the inside next time. A Kerbal can actually climb through it.

Cool!  Didn't know that!

17 minutes ago, Azimech said:

Next question: would someone be interested in hollow decouplers? Because it's very easy to make them. Five minutes of making a config file, maybe 10 minutes of testing.

Yes.  There's always someone interested.  If you have the know-how, go for it!