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Forum » SpaceEngine » Archive » Work progress and public beta test - 0.9.7.4
Work progress and public beta test - 0.9.7.4
SpaceHopperDate: Friday, 01.07.2016, 21:16 | Message # 3016
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I would really love Carbon stars, Zirconium stars, and Wolf-Rayet stars to be procedurally generated




3.14% of all seafarers are PIrates.
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JCandeiasDate: Saturday, 02.07.2016, 00:41 | Message # 3017
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Quote SpaceEngineer ()
What? Do you say what installer cleared up the addons folder? This is impossible...


Very possible. Just happened to me. :/





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SpaceEngineUser9021Date: Saturday, 02.07.2016, 00:44 | Message # 3018
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I am noticing a major issue on the latest Nvidia drivers (368.39) on my gtx 950 in Space Engine 0.9.7.4. I am aware that others have reported experiencing related issues on the latest drivers as well, but mine seem quite different. All terra planets are completely flat. Reverting back to older drivers (365.19) seems to fix the problem as others have reported.

Here are some pictures of Kepler-452b illustrating the issue:

368.39: Flat with weird lava flows which occasionally morph into rivers...

359.19: Usual awesomeness

Attachments: 1659589.jpg(268Kb) · 9373421.jpg(298Kb)
 
JCandeiasDate: Saturday, 02.07.2016, 02:14 | Message # 3019
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Just downloaded and installed the newest version and...

... I'm frustrated by it.

Remember the old SolarSys3000 addon? It was a cute speculation about the state of the Solar System in the year 3000, with lots of terraformed real estate all over the inner Solar System, Ceres in orbit around Mars (and Mercury around Venus), and a very insteresting jovian system, after Jupiter having been transformed into a brown dwarf, somehow.

It was originally a replacement addon, to be used instead of the actual Solar System, but I liked it enough to set it free, placing it in the Large Magellanic Cloud with a nice view to the Milky Way.

And I can't use it anymore.

Why?

Because there's this annoying bug, you see? A bug that seems to be ignored, by which a brown dwarf in a regular planetary orbit around another star turns the star it orbits into another brown dwarf of the same type and size. It kind of contaminates it, zombifying it.

Let me show you.

Here I'm near Earth II, in the SolarSys3000 addon. I did a few changes to the original addon, updating textures, adding night lights (and never mind that in the far future night lights shouldn't be as they are today), etc., and, most importantly, commenting Jupiter out.



Pretty, innit?

But then I go and remove the comments, putting Brown Dwarf Jupiter back in, and this is what I get. Same time, same place, totally different scenery.



This bug is annoying! It shouldn't happen. It didn't happen until 0.9.7.3, if I recall correctly.

Attached is the current state of my version of SolarSys3000. Never mind Sol3; it was a test to see if I could place a star in the Andromeda galaxy. Also, only the inner Solar System has updated textures; everything beyond the Asteroid Belt is still waiting for this bug to be sorted out.

Attachments: 3791202.jpg(307Kb) · 2293381.jpg(285Kb) · Sol2.sc(0Kb) · SolarSys3000.sc(51Kb)





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JackDoleDate: Saturday, 02.07.2016, 02:19 | Message # 3020
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Quote JCandeias ()
Quote SpaceEngineer ()
What? Do you say what installer cleared up the addons folder? This is impossible...

Very possible. Just happened to me. :/

You should have read this!
Quote SpaceEngineer ()
Ok, SE installer indeed deletes ALL files and folders in the installation directory before install. I fixed this in installer script, it will not do this in future

Only two posts below.





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JCandeiasDate: Saturday, 02.07.2016, 02:30 | Message # 3021
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Quote JackDole ()
You should have read this!


Indeed.





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abyssoftDate: Saturday, 02.07.2016, 16:42 | Message # 3022
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JackDole one of the note you provided was that for SE 1 AU = 149597870.691 km
This varies from the current value of 149597870.700 km by definition.
Which albeit is only a small variance (6.016e-9%) it does add up on larger distances and increases cumulative errors.

So I am wondering, if other constants vary from the current adopted values in SE

G 6.67408E-11 m^3 kg^-1 s^-2 CODATA 2014
lyr 9460730472580800 m by definition
pc 30856775814671900 m by definition

The following also vary based on information in various threads

Julian Year 365.25 days of 86400 seconds definition

1 SE year = 365.24218985 days indicated in the Planet mod thread. (this looks like the tropical year)

can anyone tell me what does and doesn't vary and current values so I can have my calculators up to date for SE 0974 calculations.


Edited by abyssoft - Saturday, 02.07.2016, 16:54
 
JackDoleDate: Saturday, 02.07.2016, 20:52 | Message # 3023
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abyssoft,
Astronomy/Mathematics - Wikiversity has this value:
Code
1 AU = 149,597,870.691 km


The programs that I use - 'ConvertAll' and 'SpeedCrunch', provide both 149597870691 m.

I do not know what value SpaceEngine used.

SpeedCrunch:
Code

Gravitational constant: 6.67408e-11
Speed of light:         299792458 m
Light year:             9.4607304725808e15 m
Parsec:                 3.08567802e16
Julian year             365.25

ConvertAll:
Code

Seconds per day:        86400


It would be good to know what values are used by SpaceEngine.
SpaceEngine uses 365.24218985 days for the length of a year.





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abyssoftDate: Saturday, 02.07.2016, 23:20 | Message # 3024
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from IAU Commission 25 Resolution B2 (which was ratified) it has the same value as I was using Astronomy/Mathematics - Wikiversity seems to be out of date.
 
JackDoleDate: Saturday, 02.07.2016, 23:35 | Message # 3025
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It may be that this is the 'official' value. In any case it is a rounded value. I think more accurate is 149597870691 m.

But as I said, I would use the value that is used by SpaceEngine. If I knew it.





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SpaceHopperDate: Sunday, 03.07.2016, 03:28 | Message # 3026
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JackDole, how did you figure out SE's number of days in a year?




3.14% of all seafarers are PIrates.
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Got Mole Problems? Call Avogadro at 602-1023
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JackDoleDate: Sunday, 03.07.2016, 07:21 | Message # 3027
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Quote SpaceHopper ()
how did you figure out SE's number of days in a year

In this thread: MOD - Creating a Planet 0.972

Under Orbit:

Code

Epoch - epoch of the periapsis passage in Julian days.
Period - orbital period T in years (useful for elliptic orbits). 1 year = 365.24218985 days.
MeanMotion - mean motion n in degrees per day (useful for parabolic and hyperbolic orbits).





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PrzeszczepDate: Sunday, 03.07.2016, 08:16 | Message # 3028
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Wolfram|Alpha gives 33 significant figures. No idea where do they get this value from though and I think we "should" stick to the defined value.




CPU: Intel Core i5 4690K | GPU: MSI GeForce GTX 970 | RAM: 8 GB
 
HimselfDate: Sunday, 03.07.2016, 19:46 | Message # 3029
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It seems that some of the stellar black holes have anomalously high masses. Could it be related to most red supergiants having extreme masses?



Attachments: 7051099.jpg(299Kb) · 0867171.jpg(339Kb) · 0008607.jpg(243Kb)
 
HetairosDate: Monday, 04.07.2016, 00:56 | Message # 3030
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Huh, red supergiants really got more massive in RC3. Look at the star I posted here. The screenshot is from RC2, but it's still there, with most parameters identical save for mass (now nearly 2250 solar masses) and rotation period (over 32 years in RC3).
 
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