Physics buoyancy distance too high

[Azimech]

Line 83 of the physics.cfg says the following:

buoyancyRange = 1000 // If altitude of a part is greater than this above sea level, no expensive buoyancy checks are run

KSC ground level is at 69 meters. So this means all craft have these buoyancy checks when landed. I can only imagine this has an effect on large part count vessels. I haven't tested just how much this might affect performance, it's probably not much.

But anyway, I think a better value would be 10 meters.

[klgraham1013]

I can't imagine why it would be so far above 0.

[tomf]

2 hours ago, klgraham1013 said:

I can't imagine why it would be so far above 0.

Balloons?

[Spricigo]

Maybe report it in the bug oversight tracker?

[EpicSpaceTroll139]

How funny! I was just reading through the physics.cfg on an unrelated quest and noticed that yesterday. I thought that was strange too. Might run some tests myself when I get the chance.

I think setting it lower is a good idea though.

Edited September 30, 2017 by EpicSpaceTroll139

[ZooNamedGames]

On 9/29/2017 at 7:31 AM, klgraham1013 said:

I can't imagine why it would be so far above 0.

Especially since all water exists on the same altitude. Maybe it's calculating for altitude of the terrain under the sea. No idea why.

[klgraham1013]

Prehaps someone @SQUAD could let us know if changing this would have disastrous consequences. 

[Azimech]

3 minutes ago, klgraham1013 said:

Prehaps someone @SQUAD could let us know if changing this would have disastrous consequences. 

I changed it. No negative effects so far.

[SpannerMonkey(smce)]

14 minutes ago, Azimech said:

I changed it. No negative effects so far.

Any positive effects? or no noticeable change.

 

[Azimech]

1 hour ago, SpannerMonkey(smce) said:

Any positive effects? or no noticeable change.

 

Maybe someone could do a performance test? I'm quite busy with finalizing a new project at the moment otherwise I'd do it myself.

[The_Rocketeer]

Hmm... well there was a time when it was possible to reach 1000m altitude on an antiradial trajectory while still doing 2 or 3km/s. Of course surface contact with the ocean in that scenario is hardly likely to result in a requirement for buoyancy calculations...

 

 Perhaps just nobody has really thought about this in a while.

[Majorjim!]

16 hours ago, Azimech said:

Maybe someone could do a performance test? I'm quite busy with finalizing a new project at the moment otherwise I'd do it myself.

You said in the title that it was hurting performace.

[Azimech]

Just now, Majorjim! said:

You said in the title that it was hurting performace.

Technically, yes. But how much will probably depend on the system and part count. If there's a 1% slowdown per part, the cumulative result when having 800 parts is probably a bad thing. In any case, whatever performance gain can be made, should be made. Especially since this setting is unnecessary .