Ringworlds

Determining direction is pretty easy, spinward and anti-spinward, which IIRC you woudent even need a device to find, just your inner ear.

MY WABBIT

"Know" is probably a strong term with this, but a really big gun on the inside can shoot basically anywhere else on the inside of the ring and that's cool.

Orion's Arm may help you out with that.
orionsarm.com/eg-article/5151b9b79834e

Related question, what about a cube world, assuming it maintains it's cube shape?

The main thing would be that Gravity would not align with the direction of the "ground" anywhere but in the centers of the sides. It would feel like the center is a valley, and any direction away from it would feel like going up an increasingly steep hill, with the edges being the peaks of the hill. The buildings closer to the edge would be noticeably tilted towards it, like the Leaning Tower of Pisa. Plants would be too.

Water would move from the edges and collect at the centers of the sides, so there would be constant motion and you either wouldn't have or would rarely have still bodies of water. The sunrises would be much more uniform and would hit each side at roughly the same time, so each side would only have one timezone.

No idea what it would do to mountains or the weather.

Shooting a gun at some fuckers on the other side of the ring and having to factor in orbital mechanics into your shot would be fucking awesome.

Wouldn't it crash with the force of a nuke? Oh, right conservation of momentum. Everything else of the mass of a person coming from other system would crash with the force of a nuke.

One important thing to know is that the atmosphere will be too thick to see that you're actually on a ringworld. It wont be like halo where you can see it curving up in the distance.

At most you'll see a black band devoid of stars at night - if your ringworld even has a night that is.

Does it make sense for landmasses to form in the centers of the sides? What about atmosphere?

The way i'm imaging my world is it takes place on one face of the cube, with a ring of land surrounding a massive central sea, pocketed with smaller landmasses.

But you could shot at other star systems with artillery and they would crash against them with the force of a nuke. Ringworlds spin so fast that an object has enough kinetic energy to, eventually, leave the galaxy entirely. This also make them suitable for launching ships or as a port for interstellar ships.

There is a star in the middle of the ring, as well as shades to create a day and night cycle also the ring is rotating. You can't just shoot from one side to the other without having to do space math.

Is there?

Do you mean a toroidal planet?

Look here io9.gizmodo.com/what-would-the-earth-be-like-if-it-was-the-shape-of-a-d-1515700296

Yes there is, a ring build around a star within its habitable zone is specifically what the term refers to and was coined to describe.

Would 100 billion people be a reasonable population for a ring world?

I'm trying to do some RP for Stellaris and I couldn't find any solid numbers, but I think 100 billion seems reasonable if you assume it's ringworld's are either primitive or heavily decayed.

Depends on so many factors. Size, distance from star, amount of land dedicated to living space, government, tech level, recent history, number of species, type of species, supply vs demand.

How long is a piece of string, basically.

>Ringworlds

What happens to Birds and other flying animals in a ringworld?

They don't fly high enough for it to be relevant.

Without any external objects to use as paralax references you would not be able to determine ring spin direction on a ring with constant angular velocity.

Per mass unit a ring actually has more surface area than a sphere.... a lot more. You'd have so much more usable land mass on a ring with equivalent earth mass.

I've been a fan of this guy for years; basically ground floor. Its awesome that he is getting popular enough that other people i know are discovering him independently. He is going to be big some day

Aww. Is that the same whether or not you're on a big one or an orbital one?

This onebis for all the biologists in the house:

They form ring species

I forget, when you discover Sol during WWII, how many pops do they have?

Because you could take the 1940s population figure, divide by the number of pops, and then multiply by 100 to see how many your average 4 section ringworld could support.

If the ring is big enough you wouln'd feel a lot. However the clouds would move in the same general direction so that would work.

So, as an user said earlier, how would you do a fantasy ringworld?

It rotates around the belly of a giant space turtle.

How would things work if it doesn't have a light source in the centre? Maybe it's in orbit like a planet anyway?

Well, I mean, how do you do a blend of sci fi and fantasy well that way?

>Are ring worlds exclusively sci-fi?
It depends on the usage:

> We found a ringworld and we're exploring it to figure out who built it and why it doesn't fly apart
Sci-fi.

> We live on a world, which just happens to have an arch in the sky and is infinite and it's always either full daylight or dark
Fantasy.

bump

5 or 6 iirc

So roughly 50 billion

The sun appears from the east in the morning, passes through the center, and disappears in the west. The moon wanders in a chaotic orbit, bringing ill tidings where it passes near. On the outer surface of the ring where the sunlight is never bright towering spires full of the citizens of strange civilizations stretch into the darkness. Some dig deep to plunder the sunlit realms.

...

With a ringworld 1 au from its sun and the height of earth with the population density of earth c. 10,000 BC you would be looking at around 10^18 people. For 100 billion people at the same population density on a ring with the same height the ring would have to be only 25000 km from its sun.

If "reasonable" means "barely any" for you.
A ringworld at 1 AU from the sun and just 100 kilometers wide, at the current population density of the Earth, would have a bit under 220 *trillion* people

Why is the sun moving at all and isn't eternally at the zenith?

Actually, if the ringworld has a "night" created by moving shades, you'll be able to see in the night sky the sections of the ring that are currently lit.

Would stars be holes in the sunshades?

I played a game of Dawn of Worlds that was a ringworld made from a gigantic space serpent.
It was pretty fun, but the game eventually collapsed when players got too attached to their creations when the different civilizations went to war with each other.
>Dramatis Personae
>Giant Space Serpent
This gargantuan being is large enough to coil around the entire sun, but this would kill all the plants and creatures that live on its surface. Not extremely intelligent, but seeks to consume the sun to become more powerful.
>Evil Sun God
Literally a living sun that has spent millennia blasting away the space serpent that sought to consume it. It has gone insane and even now that the serpent cannot possibly reach it now, it still occ
>Great Stone Dragon
A dragon that resembles a living mountain range. It comes from another world that has since been destroyed, and carries on his back the last dwarves that escaped with him. When the Stone Dragon discovered the conflict between the serpent and the sun, he encased the serpent in stone and locked it into an ouroboros-like position around the sun.
>Elrihm
A tree god who lives on the surface of the space serpent, but was unable to create a functioning ecosystem until the Stone Dragon arrived. Now much of the inner surface of the serpent is heavily forrested, but occasionally the sun will launch fireballs at the serpent, believing it is still under attack.
>The Twin "Moon" Gods
Two gods each dwell in a moon that orbits the sun and use magic to push the sun and serpent away from each other. Before the Stone Dragon arrived, the Moon gods could barely keep them apart. The moons were also the dwelling place of the fey if I remember correctly.

This is awesome.

Damn this is nice.

The sun shades are far away and don't wont have an angular size much larger than the sun.

North South spinward antispinward

I guess it would make sense to have a prime meridian somewhere to determine absolute and not just relative location

This post is to big. Someone make on a computer make this post an image.

Halo had an underground level and shit was mega deep, iirc they flew a dropship into it.

Instead just put a half sphere cover around the "sun" in the center. Make it reflective and you need an even smaller "sun" as you can amplify the light being projected.

Ring world but in water.

Here is the file we used to make the map. Pretend it is not Hex shaped.
I forgot a god (Nog Bathog the Faceless God) as well as how much they influenced the game, except that they operated from an inter-dimensional library.
Since it was played online through Skype and a map making program, not all the players were there at all times.
I also remembered that it wasn't twin Moon Gods, but a two-faced god named Premordus.
Races included dwarves that emigrated with their Stone Dragon God and possess a few technologically advanced relics from their old world, island-dwelling storm giants that protected their territory with steel towers capable of controlling nearby weather, Yuan-ti conquerors with airships, elves that turned trees into living weapons like catapults and ballista, marauding ash zombies that were born whenever the Sun would nuke an area and turn it into a fallout-esque desert.
There was a bunch of other, minor stuff that I've forgotten in the years since I played.

Bump

>A lot would only have two borders.

You've no idea how WIDE a ringworld is, do you? Niven's version has a width of about 1,000,000,000 miles.

>>Also how the hell would you determine direction?

You are profoundly stupid, aren't you? Determining spinward and anti-spinward is simply a matter of watching the movement of the shadow squares. "North" and "south" then just become a matter of facing in the proper direction and knowing your right hand from your left.

Then again, telling left from right might be beyond you.

Having a rough Christmas, user? This is Veeky Forums, not /v/, you don't need to act so unreasonably and outrageously hostile to fit in here. Especially about a purely speculative sci-fi thought experiment.

This is a super cool setting. Do you have any more material you'd be willing to share?

>This is Veeky Forums, not /v/, you don't need to act so unreasonably and outrageously hostile to fit in here.

This is Veeky Forums, white knight. Telling fucking morons that they're fucking morons has been part of it since before Moot fired W.T. Snacks.

I have the god profiles people wrote up, I'll post what I saved.
>Apophis
The Sun eater, Twisting chaos, The tounge of liars, Hider in the Horizon
Chaotic Evil
Darkness(Night),Chaos,Trickery(Deception),Scalykind, Air

>Portfolio
Lies, Snakes, Influence, Disruption of Light.

Apophis was born of the Coils of Chaos, and is the rightful heir of all that is and creation
sailed he amongst chaos for aeons unfettered until the Alien-Sun Helios bore unto his domain the light
wary of his light, Apophis for the first time could see the absense of being the Darkness with which he resided,
Upon this sight his words echoed throughout space
The Intruding Helios burst with light, so bright that it burned and fires raged
Apophis in turn hissed so mightily the wind was born and blew his flames away
Lashed with his mighty tail the Sun subdued, he coils around to consume
Helios with his flames gone let loose a burst of light so thick it pierced two perfect holes in his flesh
They escaped to fast among the illuminated chaos, forever gone his wholeness he bites his tail
he coils ever tighter, waiting to strike while holding himself in one piece, While the Alien Sun bides its time,
waiting for its flames to grow once more so that it may bend chaos to its will..
Apophis waits over the horizon for his tail to return, whispers he one last time,

>WORSHIPERS
Apophis's worshipers operate in a caste system with each priest having several acolytes and slaves attending
to them, their temples are no secret and worshipers of Apophis regularily engage in politics and bribery to subvert those
around them and undermine their enemies.

The main goal of the priesthood of Apophis is to prepare the world to bring about his avatar so he may swallow the sun whole
and leave the world in eternal darkness.

>FAVORED WEAPON
Three-section Staff(to better simulate the movement of snakes)

>SYMBOL
A King Cobra with the sun in his mouth

>NAME
Zilant
>TITLES
The Dragon King, King of the Dwarves, Zilant the Mountain, the Dragon Fortress
>ALIGNMENT
Lawful Good
>DOMAINS
Earth(Metal), Protection, Artifice, Law, Scalykind (Dragons)
>PORTFOLIO
The God and King of the Dwarves, protector of the weak, the builder of worlds
>WORSHIPPERS
Dwarves, crafters, soldiers, dragons, and those in need.
>HOME
The dead planet Asgul
>FAVORED WEAPON
Hammer
>SYMBOL
A Shield depicting a Mountain

The wise dragon Zilant learned quickly on his home planet that conflict with the races of Asgul would mean his kinds extinction.
In time, he created an alliance between the people and dragons. In his old age, he had become a massive dragon with scales of stone.
On his back his rocky horns have been hollowed out. The dwarves, which have made him their king and god, have turned his mountainous hide into a fortress.
He and his people lived well, but eventually the planet Asgul was killed/destroyed by strange invaders. Asgul survived the death of his planet and
escaped with what few dwarves he could take with him. With his protective magic, they rest in stasis as Zilant wanders the stars.

>Name
Helios
>Title
The Everbright, The Pain of Life
>Alignment
Lawful Evil
>Domains
Destruction, Fire(Ash), Law, Void(Stars), War
>Subdomains
Catastrophe, Tyranny
>Portfolio
Flames, Endless Desert, Tyranny, Slavery, and Hatred
>Worshippers
Helios has no church nor uniform method of worship. He has very few orders in his name, and even less that use it for religious purposes. His worship is vast however, spread through prayers for mercy and vengeance. Most people will pay tribute to Helios in some way, though these are as varied as the people who are performing the worship. Outward displays of admiration are rare but have been known to be performed by Tyrants, Slavers, and Mercenaries attempting to gain his favor to bless their holdings and trades against revolt and failure.
>Home
His body at the center of the Ring
>Favored Weapon
Meteor Hammer
>Symbol
A ball of flame spilling over an ashen ring

>NAME
Premordus
>TITLES
2 Faced God, Moonwarden
>ALIGNMENT
True Neutral
>DOMAINS
Sun(Light) Darkness(Moon) Protection Community
>PORTFOLIO
The 2 Faced God Premordus is the balance that keeps the Sun and Suneater from tearing the world apart,
intervening when neccessary to prevent the two from fighting and preventing one from becoming too powerful
>WORSHIPERS
Although he does not have a large following, he does have one. His followers are peaceful and strive
to bring peace and balance to those around them.
>HOME
Premordus is the twin moons residing in the space between the sun and the snake.
>FAVORED WEAPON
A double edged blade
>SYMBOL
A circular face, half is dark half is light

Here. Have some scale. It starts off with the continents of earth.

youtube.com/watch?v=sR2296df-bc

>NAME
Elrim
>TITLES
God of the Forest, Life-Giver, Earth-Shaper
>ALIGNMENT
Neutral Good
>DOMAINS
Earth, Plant, Animal, Water, Growth, Ocean
>PORTFOLIO
Elrim is known for shaping the land to his desires, bringing life to the barren world, filling it with forests and mountains before creating the life that would fill them. Elrim created The Beasts of Knowledge in his own image, his chosen race. Elrim watches over the world and ensures that life goes on, encouraging his worshipers to do good by one another and to not sin in his vision.
>WORSHIPERS
Those in touch with nature, those that live in the forests or the mountains. Farmers are also known to pray to Elrim for bountiful harvests. Worship can take place almost anywhere, as long as remnants of Elrim's creations are present, such as leaves from the forest or rocks from the mountains. Worshipers often celebrate during a week long holiday that takes place on the second week of spring known as the "Golden Harvest" this is when it said Elrim shaped the land.
>HOME
Elrim lives within a realm known as the Jade Plane. This plane of vast plane of existence mainly comprises of experiments that were conducted before shaping the planet, which consists of stone trees, Thick Swamplands and Mountainous waterfalls. At the heart of this realm though lies a deep forest atop an unbelievably huge mountain, this is where Elrim lives and where his worshipers join him in the afterlife. A vast, beautiful forest full of rivers and caves, treetop homes and underground dens. At the northern edge of this island, in the tallest tree is a mountain, atop which Elrim observes the world.
>FAVORED WEAPON
Longsword
>SYMBOL
A leaf or a bolder with a eye on it.

>Any factions would be much more limited in terms of expansion.

Ringworlds have a potential population ceiling in the tens of trillions.

...

...

>Name
Nogoth-Bathog
>Titles
The Forgotten, The Faceless One, The Lost One
>Alignment
True Neutral
>Domains
Luck, Desperation, Sacrifice, Curiosity
>Portfolio
The fallible god. Nogoth-Balog creates simple out of curiosity, and cherishes that which is lost or forbidden. Ruling an empty throne in the Library of the Forgotten, a place in which all that is ever lost or forgotten eventually ends up, Nogoth-Balog prefers to walk the world that it views, interacting and discovering all of the nuances and interactions of its inhabitants. Never one to pick sides, the Lost God will however create situations in order to simply observe what happens.
>Worshipers
Primarily scholars and wanderers. The few historic documents that are actually accurate describe a Faceless God hidden behind the Lost Door that's centrally located in nowhere. Worshipers looking for inspiration, such as poets and artisans but ranging all the way to thieves and adventurers, carry golden coins printed with the face of a man on one side and of a woman on the other. They rub these coins while searching, hoping that by rubbing the faces bare they will be able to use the coins as currency to buy passage into the library of the Forgotten.
>Home
The Forgotten God moderates the Library of the Forgotten, which is in itself its own plane of existence. This Library is only accessible by those who are truly lost and are not searching for it, and have the means to pay their dues to the Lost Gate, opening once an equivalency is met. Rumor also has it that some individuals whom have crossed the Gate were able to return with something from the other side, but only at a great sacrifice to offset the balance.
>Favored Weapon
Guisarme
>Symbol
Faceless Coin, Fae

The shadow squares my not be traveling at the same pace or direction as the ringworld, nor are they required to be stationary. Furthermore, considering the ringworld might not necessarily need to spin to provide effective gravity due to it's mass, you might have further complications, as the stars may not be visible even at 'night' due to how much light is reflected off the "arch" of the ring into your location.

Playable Races:
Dwarves
Stonforged (dwarflike-constructs)
Pangoll (pangolin)
Silk People (caterpillar)
Selkie
Moonkind (sort of like Moonfolk from Kamigawa)
Fribets (frog)
Ibexians (mountain Goat)
Penguins
Strig (Pterodon)
Ash Zombies (undead created when the sun nukes an area of the Ring)
Orcs
Humans (Mostly insular and occupy hidden villages)
Elves
Rikitavi (small catfolk)
Faeries
Myconid (small, medium varieties)
Saurians (Dino-people)
Gonzuiman (Catfish)
Thri-Kreen (Found on Sand Moon)
Yuan-ti

Non-playable Races:
Zyz (Flying intelligent serpents)
Wurms (giant intelligent serpents)
Echidna (Intelligent Serpents)
Gorgons
Lamia (Half-human, half-serpent)
Comets (Evil self-destructive fire elementals)
Treants
Burned (Evil burning treants)
Myconid (Large, Huge varieties)
Storm Giants

Things to consider assuming it's a Niven-style ringworld:

At 1 AU it's literally billions of times the earth's surface area. If you peeled the earth and laid it out mercator-style it wouldn't reach from one wall to the other. Teleporting even 1% of the length of the ring would be like teleporting to a different planet where racial/cultural differences are concerned.

The sides of the rings are massive walls reaching high enough to contain the atmosphere. Mountains form from alluvial deposition along these walls. Mountains in other areas are artificial or created by more exotic means (the big mountain Niven's book is created when a rogue asteroid hits the outer surface of the ring hard enough to buckle it and force the inner terrain upward)

Day and night is caused by orbiting blocks. Days and nights are always the same length unless the blocks are configured for variation, and there are no seasons.

The various components are held together by monoatomic filament, which can occasionally fall down to the surface. Pieces of it are invisible, can be hundreds of miles long, and will slice you in half if you walk through them. If you see trees with limbs sliced off, turn around and find a new route where you're going.

At least in Niven the ringworld is created by Pak Protectors to house their Breeders. Pak are hominids (Earth is a failed Pak colony), so if the Protectors have stopped curating the gene pool it'll be full of hominid subspecies. Humans, elves, orcs, etc. are all viable for a ringworld.

Since all the intelligent races are variations on the same genetic stock, they can all fuck. Pregnancy isn't possible, and STDs don't cross the species barrier. Magical realm the shit out of it, Niven sure did.

im pretty sure
>The sun appears from the east in the morning, passes through the center, and disappears in the west.

is impossible to do with a stable orbit.

Also if it's a Niven style ringworld the arch will not be obviously land. It's too big for visible curvature if you're standing on the surface, so it'll look like a regular world with a thin blue line arcing across the sky.

Look at halo, it’s a much smaller ring than the Niven class originals, and it achieves a day night cycle by being in orbit with a cant to its rotation, much like the earth’s axis of rotation is not vertical relative to its orbital plane. This makes the inside of the ring that is farthest from the sun daylit, while the side of the ring closer to the sun casts its own shadow on the livable surface.

Most Important Question coming through.

If this is a fantasy setting, what adventures could be had on such a thing?

user, you could have an Earth-sized batch of continents on a Ringworld and it wouldn’t comprise even a percentage of the thing’s total surface. A fantasy medieval setting could totally be on a Ringworld, and the fact it’s Ringworld would never come up besides potential allusions to how such a world came to be.

Or just not havee the star in the middle of the ring. Make it orbiting the star like an ordinary planet and it can have a fairly ordinary day/night cycle.

The mind boggles...

I don't think I've read anything more abjectly stupid on this forum before. When you remember this is Veeky Forums, that's saying something.

Ringworlds are great for "kitchen sink" type games where a lot for different genres are available depending one which section of the ring the players are visiting at the moment.

I assume you guys are thinking of different scales of ring worlds. Something like the ringworld in Halo is smaller than the earth and has a much smalled surface area for habitation, and would probably have the only 2 border nations that user mentioned.

Please explain with a shitty paint drawing I want to be in the screencap

Just have your ring world orbiting like a normal world but angled relative to the plane of its orbit much like earth. So the side furthest from the sun gets full sunlight and the nearside isin its own shadow facing out from the star

That would make it a banks orbital or a bishop ring.

The halo isn't really a ringworm though. It's just round.

Its a ring shaped world, its a ringworld. They don't need to be millions of km across like nivens ringworlds to count.

OP here, I was not aware a ringworld and were separate things. I was initially thinking of it as the one in my link, as I wanted something where the peoples of the world could tell that what they were on was a ring-shaped construct.

They're not really. It's just the two most popular examples are so different in size. So some people tend to think of ringworlds being only one or the other.

>Without any external objects to use as paralax references you would not be able to determine ring spin direction on a ring with constant angular velocity.
Of course you can, just use conservation of angular momentum: a mass going up will experience an apparent force due to having lesser radius of rotation around the central star and thus speeding up relative to the ring surface.

Got my chuckle.

Call me an ignorant if you want but... Why exactly does it have to be a ring? Couldn't it be something VERY SIMILAR, as in, an hexagon or a form with more courners? I don't know, I am just asking

>>Any factions would be much more limited in terms of expansion.
>Ringworlds have a potential population ceiling in the tens of trillions.
Its not about total surface area, its about total perimeter

The problem is that in a ring world you use centripetal force to get artificial gravity.
en.m.wikipedia.org/wiki/Artificial_gravity
You can check the numbers in the previous link, but in order to get one g (9,8 m/s2), and an orbital period of 24 hours, you would need a ring with a radius of almost two million kms.
One of the halo rings, that i readed somewhere, had a radius of 5000 km, would rotate once every 1,3 hours in order to provide a earthly gravity

The problem is that in a ring world you use centripetal force to get artificial gravity.
en.m.wikipedia.org/wiki/Artificial_gravity
You can check the numbers in the previous link, but in order to get one g (9,8 m/s2), and an orbital period of 24 hours, you would need a ring with a radius of almost two million kms.
One of the halo rings, that i readed somewhere, had a radius of 5000 km, would rotate once every 1,3 hours in order to provide a earthly gravity

Um, physics on ringworlds would be incredibly dangerous and lethal places.

youtube.com/watch?v=UrLey-pX7Bc