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JackDole
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Help with creating Mods and Addons

12 Nov 2018 23:25

PlutonianEmpire wrote:
Source of the post Someone on Reddit managed to give an atmosphere to an asteroid. Every time I do it, my game crashes. How do I get it to work?

Here is a terraformed Phobos:
scr00133.jpg

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TerraPhobos.sc
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But if that works with your Intel graphics card, of course, I do not know.


If you have a script of an asteroid where it does not work, maybe you can post it here.
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JackDole: Mega structures ... http://old.spaceengine.org/forum/17-3252-1 (Old forum)
 
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PlutonianEmpire
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Help with creating Mods and Addons

13 Nov 2018 00:55

Ok, I also did trial and error on my own as well, it seems the source of the crashing was forgetting to suppress aurora with the NoAurora true parameter. Thank you!
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BednarovPL
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Help with creating Mods and Addons

27 Nov 2018 02:58

Hi. I was wandering if anyone here can point me to a video or some other advice on how to make custom spaceships for SE 9.8.0? I'm not talking about the online ship editor tool. I want to model my ship, and texture it in Blender, and then extract it into space engine, set docking ports, engine placement/fx etc. Is this possible? I saw user [color=inherit][font=Roboto, sans-serif][size=100]HarbingerDawn[/size][/font][/color] has made/imported some ships from other sources. Thanks a lot for advice!
 
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Mosfet
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Help with creating Mods and Addons

27 Nov 2018 06:50

BednarovPL, a place to start is the section "Creating a ship" on the manual:
http://spaceengine.org/manual/making-ad ... ng-a-ship/
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BednarovPL
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Help with creating Mods and Addons

30 Nov 2018 00:08

[quote="Mosfet"][ref]BednarovPL[/ref], a place to start is the section "Creating a ship" on the manual:
http://spaceengine.org/manual/making-ad ... ng-a-ship/[/quote]

Thank You! I searched for it but somehow couldn't find it! Have a good day!
 
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MicahMathews
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Slow Orbits

30 Nov 2018 11:20

I've been creating some star systems manually, but come across some issues with the orbits of some of the planets.

I've been letting the StarSolver figure out the orbital duration of the planets, but found that the orbit times have got crazy long.

One of the planets I put in (about 6000km and taken from a generated planet) has an orbit of 450000+ years, yet it's orbit is only 40 AU out.

At first I was thinking it was something to do with the Barycenter, but I'm now not so sure. Maybe I'm missing something. I use a Barycenter to create the relationship between a blackhole and red supergiant:

Star "Kalla B"
{
ParentBody "Kalla"
Class "M2 Ib" // spectral class "M1.5Iab-Ib"
Lum 9950.0 // luminosity, or
RadSol 720.5 // radius in Solar radii
MassSol 21 // mass in Solar masses
Teff 3650 // surface temperature in Kelvin
Orbit
{
SemiMajorAxis 7.1 // in AU
Eccentricity 0.0
Inclination 0.0
AscendingNode 0.0
ArgOfPericenter 0.0
MeanAnomaly 0.0
}
}

Star "Kalla A"
{
ParentBody "Kalla"
Class "X"
MassSol 15.0
RotationPeriod 1.0e-7
AccretionDisk
{
Radius 0.00002 // in AU
Temperature 3000 // in Kelvin
Luminosity 250 // in Solar luminosities
Brightness 1 // render brightness scale
Density 8
TwistMagn 60
}
Orbit
{
SemiMajorAxis 6.5 // in AU
Eccentricity 0.0
Inclination 0.0
AscendingNode 0.0
ArgOfPericenter 180.0
MeanAnomaly 0.0
}
}

Am I missing something. Betelgeuse is a comparable size (though a single star) and it's planets at 60AU orbits are between 100-200 years in length.
I then noticed that the orbits around a red dwarf in the same system seem fine, so I'm assuming it's something to do with the way the gravitational pull of the supergiant and the black hole is calculated? Have I thrown off a variable?
Can anyone point me in the direction of my mistakes?
PS (thanks in advance) :)
Micah Mathews
www.micahmathews.co.uk
 
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JackDole
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Slow Orbits

30 Nov 2018 12:04

You should not have opened a new thread for this question. Read the 'Forum rules'. For this we have this thread: Help with Creating Mods and Addons

To your question:
SpaceEngine incorrectly calculates orbital periods for binary systems. That is, when your stars orbits around a 'StarBarycenter'.
You have to calculate the periods by hand.
I did that for your stars. And I recalculated the 'SemiMajorAxes', based on the masses and the distance between the stars.
The more massive star must have the shorter 'SemiMajorAxis'!
// MicahMathews

Star "Kalla B"
{
    ParentBody  "Kalla"
    Class       "M2 Ib"                 // spectral class "M1.5Iab-Ib"
    Lum         9950.0                  // luminosity, or
    RadSol      720.5                   // radius in Solar radii
    MassSol     21                      // mass in Solar masses
    Teff        3650                    // surface temperature in Kelvin
    
    Orbit
    {
        SemiMajorAxis   5.666667        //7.1 // in AU
        Period          8.35905364
        Eccentricity    0.0
        Inclination     0.0
        AscendingNode   0.0
        ArgOfPericenter 0.0
        MeanAnomaly     0.0
    }
}

Star "Kalla A"
{
    ParentBody  "Kalla"
    Class       "X"
    MassSol     15.0
    
    RotationPeriod 1.0e-7
    
    AccretionDisk
    {
        Radius      0.00002             // in AU
        Temperature 3000                // in Kelvin
        Luminosity  250                 // in Solar luminosities
        Brightness  1                   // render brightness scale
        Density     8
        TwistMagn   60
    }
    
    Orbit
    {
        SemiMajorAxis   7.933333        //6.5 // in AU
        Period          8.35905364
        Eccentricity    0.0
        Inclination     0.0
        AscendingNode   0.0
        ArgOfPericenter 180.0
        MeanAnomaly     0.0
    }
}

//------------------------------------------------------------------------------

scr00145.jpg
JackDole's Universe: http://forum.spaceengine.org/viewtopic.php?f=3&t=71
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JackDole: Mega structures ... http://old.spaceengine.org/forum/17-3252-1 (Old forum)
 
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MicahMathews
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Slow Orbits

30 Nov 2018 21:27

Thanks Jack, and thanks for the info about the new thread. I'd not realised it might apply in this situation, thanks for pointing it out. :)

I appreciate you working out the calculations. Any tips on calculating the planets orbits? Would placing an existing planet in a 'single star' system with the same mass as the two stars in a binary help figure out the correct calculations?

Edit: I found a tool that might help (after digging around in the FAQ page on planets):
http://www.calctool.org/CALC/phys/astro ... anet_orbit
Micah Mathews
www.micahmathews.co.uk
 
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JackDole
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Slow Orbits

01 Dec 2018 00:03

MicahMathews wrote:
Source of the post Would placing an existing planet in a 'single star' system with the same mass as the two stars in a binary help figure out the correct calculations?

That would probably work!

But you can use these formulas:
(To calculate SemiMajorAxes)
SemiMajorAxis B = Dist * MassB / (MassA + MassB)
SemiMajorAxis A = Dist * MassA / (MassA + MassB)

'Dist' is the distance between the bodies in astronomical units (AU) and 'Mass' in  sol masses.
(For the Period)
Period = sqrt(Dist ^ 3 / (MassA + MassB))

'Dist' also in AU and 'Mass' in sol masses.
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JackDole: Mega structures ... http://old.spaceengine.org/forum/17-3252-1 (Old forum)
 
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MicahMathews
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Slow Orbits

01 Dec 2018 01:25

Cool. That's fantastic. Thanks for the help Jack... and if the forum powers that be move this into the other thread, that's fine. Sorry for causing any disruption... :D
Micah Mathews
www.micahmathews.co.uk

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