• We have updated our Community Code of Conduct. Please read through the new rules for the forum that are an integral part of Paradox Interactive’s User Agreement.
Good news everyone!

Today we are going to share some details with you on how the galaxy is generated in Stellaris. When discussing this we will also touch on some of the different features of the galaxy and how we try to anticipate what modders will want to do with the galaxy generation in this game and making sure that they will be able to.

When you start a new game you can specify the size and shape of the galaxy as well as the number of (normal) AI empires. Sizes currently range from 200 - 1000 stars. The amount of AI empires only affects how many AI controlled empires that are generated from the start, a lot more will spring into existence during your game. Currently we have three different types of shapes for the galaxy; spiral, elliptical and ring. Spiral galaxies have the stars placed in arms that extend out in a spiral pattern (see “Pinwheel Galaxy”). A spiral galaxy provides an interesting geography, with voids between the arms that might be difficult to pass in a straight line. Elliptical galaxies have the stars placed in a ellipsoidal pattern (see Wikipedia), resulting in a more evenly distributed geography. Ring galaxies have the stars placed in a ring shape around the galaxy core (see “Hoag's Object”). If you play with a ring galaxy you know that other empires have to approach you either clockwise or counterclockwise within the ring, making it easier to cut other empires off from the rest of the galaxy than it is with any other shape. All of these options are of course moddable, both in regards to looks and available options.

Once you are satisfied with your options and decide to start the game, we begin the process of generating the galaxy. When we generate the stars we also decide what class each star should be. Most stars will be star classes with the different spectral types B,A,F,G,K,M. Some star systems can however be more special, like a black hole, pulsar or a neutron star. Every system with a certain star class has a given set of rules that controls how the star system is generated; you will, for example, have a hard time finding habitable planets close to a black hole. All of this is very moddable, you can add your own star classes and remove the existing ones if you want to.

stellaris_dev_diary_03_02_20121005_pulsar.jpg


We also generate some galactic features other than stars. One of these are nebulas. Nebulas are visible on the galaxy map and often contain a bunch of interesting star systems with special rare resources. In a nebula you can expect to encounter some special events and experience certain penalties and bonuses that may impact your decisions when it comes to colonization and fleet movement.

When we generate the contents of each star system we use different system initializers depending on what the system is being used for. If you, for example, were to start as a pre-scripted human you will be placed in our solar system, on Earth. Yes, all of this is moddable also. These initializers allow us to make sure that you, as a player, will always have something interesting to do within a system. They also provide us with ways to create a more balanced start, by being able to affect the content of your star system and systems that are neighboring to yours. It is worth knowing that these initializers have a certain random factor attached to them, so you should never expect the exact same setup between game sessions.

We generate a lot of interesting special content in the different systems, including the ones that no empire is controlling. This content ranges from debris to ships of unknown origin, that could be friendly or not so friendly... Speaking from personal experience when it comes to the “not so friendly” ships, I recommend all players to scout systems before going there with their science ships to survey a potential future colony. It is not fun having your science ship blown out of existence with your most skilled scientist aboard.

stellaris_dev_diary_03_01_20121005_drone_attack_scienceship.jpg


Next week we will talk about the different FTL types.
 
Last edited by a moderator:

Kuschelflummi

God Empress of Catkind
125 Badges
Aug 14, 2013
463
658
  • Sword of the Stars
  • Heir to the Throne
  • Impire
  • King Arthur II
  • The Kings Crusade
  • Magicka
  • Majesty 2
  • Majesty 2 Collection
  • Europa Universalis IV: Res Publica
  • Victoria: Revolutions
  • Rome Gold
  • Semper Fi
  • Ship Simulator Extremes
  • Hearts of Iron III: Their Finest Hour
  • Sword of the Stars II
  • Stellaris: Galaxy Edition
  • Europa Universalis IV: Mare Nostrum
  • Warlock: Master of the Arcane
  • Cities: Skylines - Snowfall
  • Europa Universalis IV: Cossacks
  • Cities: Skylines Deluxe Edition
  • Crusader Kings II: Monks and Mystics
  • Europa Universalis IV: Rights of Man
  • Stellaris: Galaxy Edition
  • Cities: Skylines - After Dark
  • Crusader Kings II: Sunset Invasion
  • Ancient Space
  • Arsenal of Democracy
  • Cities in Motion
  • Cities in Motion 2
  • Crusader Kings II
  • Crusader Kings II: Charlemagne
  • Crusader Kings II: Legacy of Rome
  • Crusader Kings II: The Old Gods
  • Crusader Kings II: Rajas of India
  • Crusader Kings II: The Republic
  • Crusader Kings II: Sons of Abraham
  • A Game of Dwarves
  • Crusader Kings II: Sword of Islam
  • Darkest Hour
  • Europa Universalis III
  • Divine Wind
  • Stellaris
  • Europa Universalis IV: Art of War
  • Europa Universalis IV: Conquest of Paradise
  • Europa Universalis IV: Wealth of Nations
  • Europa Universalis IV: Call to arms event
  • For The Glory
  • For the Motherland
  • Hearts of Iron III
Uhh! We can blow up Scientist! Way to go!
 
  • 20
Reactions:

jazzroen

Captain
54 Badges
Feb 23, 2014
407
600
  • Crusader Kings II: Charlemagne
  • Europa Universalis IV: Third Rome
  • Europa Universalis IV: Rights of Man
  • Stellaris: Galaxy Edition
  • Stellaris: Galaxy Edition
  • Europa Universalis IV: Mare Nostrum
  • Europa Universalis IV: Pre-order
  • Crusader Kings II
  • Europa Universalis IV: Res Publica
  • Europa Universalis IV: Call to arms event
  • Europa Universalis IV: Wealth of Nations
  • Europa Universalis IV: Art of War
  • Crusader Kings II: Legacy of Rome
  • Crusader Kings II: The Old Gods
  • Crusader Kings II: Rajas of India
  • Crusader Kings II: The Republic
  • Crusader Kings II: Sons of Abraham
  • Europa Universalis IV: Conquest of Paradise
  • Crusader Kings II: Sunset Invasion
  • Crusader Kings II: Sword of Islam
  • Europa Universalis IV
  • Europa Universalis IV: Mandate of Heaven
  • Stellaris: Lithoids
  • Stellaris: Federations
  • Stellaris: Nemesis
  • Europa Universalis IV: Cradle of Civilization
  • Stellaris: Humanoids Species Pack
  • Stellaris: Apocalypse
  • Europa Universalis IV: Rule Britannia
  • Stellaris: Distant Stars
  • Europa Universalis IV: Dharma
  • Cities: Skylines Industries
  • Stellaris: Megacorp
  • Europa Universalis IV: Golden Century
  • Stellaris: Ancient Relics
  • Cities: Skylines - Mass Transit
  • Stellaris - Path to Destruction bundle
  • Crusader Kings II: Monks and Mystics
  • Stellaris: Leviathans Story Pack
  • Stellaris: Digital Anniversary Edition
  • Crusader Kings II: Reapers Due
  • Stellaris Sign-up
  • Stellaris: Galaxy Edition
  • Stellaris
  • Crusader Kings II: Conclave
  • Europa Universalis IV: Cossacks
  • Crusader Kings II: Horse Lords
  • Europa Universalis IV: Common Sense
  • Crusader Kings II: Way of Life
  • Europa Universalis IV: El Dorado
nice insight in the creation of the star systems :) it answered quite a few questions of mine.
does someone have a time machine I can borrow? I'm already excited about the the FTL diary :D
 
  • 5
Reactions:

HKJ

Second Lieutenant
70 Badges
Dec 19, 2012
110
63
  • Victoria 2: A House Divided
  • Stellaris: Synthetic Dawn
  • Crusader Kings II: Reapers Due
  • Europa Universalis IV: Mare Nostrum
  • Europa Universalis IV: Pre-order
  • Victoria 2: Heart of Darkness
  • Crusader Kings II
  • Semper Fi
  • Europa Universalis IV: Res Publica
  • Magicka
  • Heir to the Throne
  • Hearts of Iron III: Their Finest Hour
  • Hearts of Iron III
  • For the Motherland
  • Europa Universalis IV: Call to arms event
  • Europa Universalis IV: Conquest of Paradise
  • Crusader Kings II: Charlemagne
  • Crusader Kings II: Legacy of Rome
  • Crusader Kings II: The Old Gods
  • Crusader Kings II: Rajas of India
  • Crusader Kings II: The Republic
  • Crusader Kings II: Sons of Abraham
  • Crusader Kings II: Sunset Invasion
  • Europa Universalis IV: Wealth of Nations
  • Europa Universalis III
  • Europa Universalis III: Chronicles
  • Divine Wind
  • Crusader Kings II: Sword of Islam
  • Europa Universalis IV: Art of War
  • Stellaris: Galaxy Edition
  • Europa Universalis IV: Mandate of Heaven
  • Stellaris - Path to Destruction bundle
  • Crusader Kings II: Monks and Mystics
  • Stellaris: Leviathans Story Pack
  • Stellaris: Digital Anniversary Edition
  • Tyranny: Gold Edition
  • Tyranny: Archon Edition
  • Tyranny: Archon Edition
  • Europa Universalis IV: Rights of Man
  • Stellaris Sign-up
  • Crusader Kings III
  • Stellaris
  • Europa Universalis IV
  • Crusader Kings II: Conclave
  • Europa Universalis IV: Cossacks
  • Crusader Kings II: Horse Lords
  • Europa Universalis IV: Common Sense
  • Crusader Kings II: Way of Life
  • Europa Universalis IV: El Dorado
  • 500k Club
Very nice! One question though, how many planets are there on average per system? And how many planets can there potentially be per system?
 
  • 2
Reactions:

Durnilhas

Second Lieutenant
66 Badges
Sep 11, 2010
194
109
  • Stellaris: Synthetic Dawn
  • Crusader Kings II: Reapers Due
  • Stellaris: Galaxy Edition
  • Europa Universalis IV: Cossacks
  • Cities: Skylines - After Dark
  • Stellaris - Path to Destruction bundle
  • Europa Universalis IV: Pre-order
  • Europa Universalis IV: Third Rome
  • Victoria 2: Heart of Darkness
  • Victoria 2: A House Divided
  • Crusader Kings II
  • Victoria: Revolutions
  • Europa Universalis IV: Res Publica
  • Europa Universalis IV: Wealth of Nations
  • Crusader Kings II: Charlemagne
  • Crusader Kings II: Legacy of Rome
  • Crusader Kings II: The Old Gods
  • Crusader Kings II: The Republic
  • Crusader Kings II: Sons of Abraham
  • Crusader Kings II: Sunset Invasion
  • Crusader Kings II: Sword of Islam
  • Europa Universalis IV
  • Europa Universalis IV: Art of War
  • Europa Universalis IV: Conquest of Paradise
  • Europa Universalis IV: Call to arms event
  • Surviving Mars
  • Hearts of Iron IV: Death or Dishonor
  • Crusader Kings Complete
  • Europa Universalis IV: Mandate of Heaven
  • Europa Universalis IV: Cradle of Civilization
  • Crusader Kings II: Monks and Mystics
  • Hearts of Iron IV: Together for Victory
  • Stellaris: Leviathans Story Pack
  • Stellaris: Digital Anniversary Edition
  • Tyranny: Archon Edition
  • Europa Universalis IV: Rights of Man
  • Hearts of Iron IV: Colonel
  • Hearts of Iron IV: Cadet
  • Stellaris Sign-up
  • Hearts of Iron IV Sign-up
  • Stellaris: Galaxy Edition
  • Stellaris
  • Crusader Kings II: Conclave
  • Crusader Kings II: Horse Lords
  • Europa Universalis IV: Common Sense
  • Crusader Kings II: Way of Life
  • Europa Universalis IV: El Dorado
  • Crusader Kings II: Holy Knight (pre-order)
  • Crusader Kings III
  • 500k Club
Will be something related to gravity or magnetic field with stars? A Pulsar is an object with a high magnetic field, very small, very heavy. Events or physics are attached to the type of star?
 
  • 4
  • 2
Reactions:

Zoft

Operations Director
Paradox Staff
18 Badges
Sep 18, 2010
510
4.266
  • Europa Universalis III
  • Sengoku
  • Magicka
  • The Kings Crusade
  • Lead and Gold
  • Divine Wind
  • Europa Universalis III Complete
  • Crusader Kings II
  • Europa Universalis III Complete
  • Europa Universalis III Complete
  • Rome: Vae Victis
  • 500k Club
  • Crusader Kings II: Holy Knight (pre-order)
  • Magicka: Wizard Wars Founder Wizard
  • Mount & Blade: Warband
  • Stellaris Sign-up
  • IPO Investor
  • Shadowrun: Dragonfall
Very nice! One question though, how many planets are there on average per system? And how many planets can there potentially be per system?

At the moment it is normally 3-10 planets, but it depends on the type of system. This number is being always being tweaked and may change for release. You can mod the files to have how many you like, but I can't promise that everything works if you go up to like 100 planets ;)

Will we also have systems with 2 or more stars?
At the moment no, but we have had discussions about it. If we were to allow it I imagine that they will be quite rare.
 
  • 27
  • 1
Reactions:

Nuukov

Shahanshah
123 Badges
Apr 11, 2011
403
1.028
  • Hearts of Iron IV: No Step Back
  • Hearts of Iron IV: By Blood Alone
  • 500k Club
  • Victoria: Revolutions
  • Victoria 2
  • Victoria 3 Sign Up
  • Crusader Kings II
  • Crusader Kings III
  • Europa Universalis III
  • Europa Universalis III Complete
  • Europa Universalis IV
  • Stellaris Sign-up
  • Stellaris: Galaxy Edition
  • Stellaris
  • Stellaris: Galaxy Edition
  • Hearts of Iron IV Sign-up
  • Hearts of Iron IV: Colonel
  • Hearts of Iron IV: Field Marshal
  • Imperator: Rome
  • Imperator: Rome Deluxe Edition
  • Imperator: Rome Sign Up
  • Rome Gold
  • Rome: Vae Victis
  • Supreme Ruler: Cold War
  • Sword of the Stars
  • Sword of the Stars II
  • Age of Wonders: Planetfall
  • Age of Wonders: Planetfall Deluxe edition
  • Age of Wonders: Planetfall Premium edition
  • Surviving Mars: First Colony Edition
  • Surviving Mars: First Colony Edition
  • Surviving Mars
  • Surviving Mars: Digital Deluxe Edition
  • Cities: Skylines
When we generate the contents of each star system we use different system initializers depending on what the system is being used for. If you, for example, were to start as a pre-scripted human you will be placed in our solar system, on Earth.

Nice dev diary ;) But I do have a question concerning the above quote:
When we play as a customised Human nation, will we also have the option to pick Earth as our starting planet?
 

Zoft

Operations Director
Paradox Staff
18 Badges
Sep 18, 2010
510
4.266
  • Europa Universalis III
  • Sengoku
  • Magicka
  • The Kings Crusade
  • Lead and Gold
  • Divine Wind
  • Europa Universalis III Complete
  • Crusader Kings II
  • Europa Universalis III Complete
  • Europa Universalis III Complete
  • Rome: Vae Victis
  • 500k Club
  • Crusader Kings II: Holy Knight (pre-order)
  • Magicka: Wizard Wars Founder Wizard
  • Mount & Blade: Warband
  • Stellaris Sign-up
  • IPO Investor
  • Shadowrun: Dragonfall
Will be something related to gravity or magnetic field with stars? A Pulsar is an object with a high magnetic field, very small, very heavy. Events or physics are attached to the type of star?
Planets and events can have certain features depending on the system they are spawned in, it is however not guaranteed.
 
  • 9
Reactions:

Franconian

Colonel
123 Badges
Oct 4, 2009
1.103
2.515
  • Crusader Kings II
  • Crusader Kings II: Charlemagne
  • Crusader Kings II: Legacy of Rome
  • Crusader Kings II: The Old Gods
  • Crusader Kings II: Rajas of India
  • Crusader Kings II: The Republic
  • Crusader Kings II: Sons of Abraham
  • Crusader Kings II: Sunset Invasion
  • Crusader Kings II: Sword of Islam
  • Tyranny - Bastards Wound
  • Hearts of Iron IV: Field Marshal
  • Europa Universalis IV: El Dorado
  • Stellaris
  • 500k Club
  • Age of Wonders III
  • Age of Wonders II
  • Europa Universalis IV: Cradle of Civilization
  • Victoria 2
  • Hearts of Iron IV: Expansion Pass
  • Crusader Kings II: Conclave
  • Mount & Blade: Warband
  • Mount & Blade: With Fire and Sword
  • Crusader Kings II: Way of Life
  • Hearts of Iron IV: Death or Dishonor
  • Stellaris: Digital Anniversary Edition
  • Europa Universalis IV: Common Sense
  • Crusader Kings II: Horse Lords
  • Surviving Mars
  • Europa Universalis IV: Cossacks
  • Hearts of Iron IV: Colonel
  • Europa Universalis IV: Mandate of Heaven
  • Stellaris Sign-up
  • Stellaris: Nemesis
  • Imperator: Rome Deluxe Edition
  • Europa Universalis IV
  • Europa Universalis IV: Golden Century
  • Surviving Mars: First Colony Edition
  • Shadowrun: Hong Kong
  • Crusader Kings II: Reapers Due
  • Hearts of Iron IV: Cadet
  • Shadowrun: Dragonfall
  • Stellaris: Galaxy Edition
  • Shadowrun Returns
  • Europa Universalis IV: Dharma
  • Europa Universalis III Complete
  • Stellaris: Leviathans Story Pack
  • Cities: Skylines - Parklife
  • Europa Universalis III Complete
  • BATTLETECH - Digital Deluxe Edition
  • Stellaris: Apocalypse
Good news everyone!

Today we are going to share some details with you on how the galaxy is generated in Stellaris. When discussing this we will also touch on some of the different features of the galaxy and how we try to anticipate what modders will want to do with the galaxy generation in this game and making sure that they will be able to.

When you start a new game you can specify the size and shape of the galaxy as well as the number of (normal) AI empires. Sizes currently range from 200 - 1000 stars. The amount of AI empires only affects how many AI controlled empires that are generated from the start, a lot more will spring into existence during your game. Currently we have three different types of shapes for the galaxy; spiral, elliptical and ring. Spiral galaxies have the stars placed in arms that extend out in a spiral pattern (see “Pinwheel Galaxy”). A spiral galaxy provides an interesting geography, with voids between the arms that might be difficult to pass in a straight line. Elliptical galaxies have the stars placed in a ellipsoidal pattern (see Wikipedia), resulting in a more evenly distributed geography. Ring galaxies have the stars placed in a ring shape around the galaxy core (see “Hoag's Object”). If you play with a ring galaxy you know that other empires have to approach you either clockwise or counterclockwise within the ring, making it easier to cut other empires off from the rest of the galaxy than it is with any other shape. All of these options are of course moddable, both in regards to looks and available options.

Once you are satisfied with your options and decide to start the game, we begin the process of generating the galaxy. When we generate the stars we also decide what class each star should be. Most stars will be star classes with the different spectral types B,A,F,G,K,M. Some star systems can however be more special, like a black hole, pulsar or a neutron star. Every system with a certain star class has a given set of rules that controls how the star system is generated; you will, for example, have a hard time finding habitable planets close to a black hole. All of this is very moddable, you can add your own star classes and remove the existing ones if you want to.

View attachment 139035

We also generate some galactic features other than stars. One of these are nebulas. Nebulas are visible on the galaxy map and often contain a bunch of interesting star systems with special rare resources. In a nebula you can expect to encounter some special events and experience certain penalties and bonuses that may impact your decisions when it comes to colonization and fleet movement.

When we generate the contents of each star system we use different system initializers depending on what the system is being used for. If you, for example, were to start as a pre-scripted human you will be placed in our solar system, on Earth. Yes, all of this is moddable also. These initializers allow us to make sure that you, as a player, will always have something interesting to do within a system. They also provide us with ways to create a more balanced start, by being able to affect the content of your star system and systems that are neighboring to yours. It is worth knowing that these initializers have a certain random factor attached to them, so you should never expect the exact same setup between game sessions.

We generate a lot of interesting special content in the different systems, including the ones that no empire is controlling. This content ranges from debris to ships of unknown origin, that could be friendly or not so friendly... Speaking from personal experience when it comes to the “not so friendly” ships, I recommend all players to scout systems before going there with their science ships to survey a potential future colony. It is not fun having your science ship blown out of existence with your most skilled scientist aboard.

View attachment 139036

Next week we will talk about the different FTL types.


*drool*
 

DominusNovus

Field Marshal
86 Badges
Oct 2, 2007
7.429
6.135
  • Crusader Kings II: Charlemagne
  • Europa Universalis IV: Cossacks
  • Cities: Skylines - After Dark
  • Europa Universalis IV: Third Rome
  • Europa Universalis IV: Cradle of Civilization
  • Europa Universalis IV: Pre-order
  • Cities: Skylines - Snowfall
  • Europa Universalis IV: Mare Nostrum
  • Cities: Skylines Deluxe Edition
  • Crusader Kings II: Monks and Mystics
  • Stellaris
  • Stellaris: Galaxy Edition
  • Stellaris: Galaxy Edition
  • Europa Universalis IV: Res Publica
  • Stellaris - Path to Destruction bundle
  • Crusader Kings II: Jade Dragon
  • Europa Universalis IV: Call to arms event
  • Europa Universalis IV: Wealth of Nations
  • Crusader Kings II: Legacy of Rome
  • Crusader Kings II: The Old Gods
  • Europa Universalis IV: Conquest of Paradise
  • Europa Universalis IV: Art of War
  • Europa Universalis IV: Rights of Man
  • Crusader Kings II: Rajas of India
  • Crusader Kings II
  • Crusader Kings II: Sword of Islam
  • Crusader Kings II: Sons of Abraham
  • Crusader Kings II: The Republic
  • Stellaris: Leviathans Story Pack
  • Crusader Kings II: Reapers Due
  • Crusader Kings II: Conclave
  • Stellaris: Digital Anniversary Edition
  • Stellaris: Galaxy Edition
  • Stellaris Sign-up
  • Hearts of Iron IV: Cadet
  • Hearts of Iron IV: Colonel
  • Europa Universalis IV: Common Sense
  • Europa Universalis IV: El Dorado
  • Crusader Kings II: Holy Knight (pre-order)
  • 500k Club
  • Rome: Vae Victis
  • Victoria 2: Heart of Darkness
  • Victoria 2: A House Divided
  • Victoria 2
  • Europa Universalis: Rome
  • Europa Universalis III Complete
  • Heir to the Throne
  • Hearts of Iron III
  • Europa Universalis IV
  • Stellaris: Necroids
Anyone else think those ships kinda look like chairs? See the arm rests?
 
  • 3
Reactions: