Randomly Generated Unique Planets

[Keedo420]

So I've been tweaking my mod's planet generation tables to make planets have a certain rarity factor. So far I have common, uncommon, and rare planets generated depending on their orbits (inner system, lifezone, or outer system). What I would like to do is also have some unique planets be randomly generated instead of having to create a custom system for each unique planet, but I can't figure out how to prevent the potential duplication of unique planets using my current system of planet generation. Here's an example of what I have so far....

Let's say a generated planet's orbit is in the lifezone. First, the code looks at the table "LifezonePlanets":

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<LifezonePlanets>
		<Table>
			<Lookup chance="60" table="CommonLifezonePlanets"/>
			<Lookup chance="30" table="UncommonLifezonePlanets"/>
			<Lookup chance="10" table="RareLifezonePlanets"/>
		</Table>
	</LifezonePlanets>

Then let's say a rare planet comes up...

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<RareLifezonePlanets>
		<Table>
			<Lookup chance="20" table="UltramarineWorld"/>
			<Lookup chance="18" table="UltravioletWorld"/>
			<Lookup chance="16" table="GreenWorld"/>
			<Lookup chance="14" table="TelluricWorld"/>
			<Lookup chance="12" table="TreasureWorld"/>
			<Lookup chance="12" table="WaterWorld"/>
			<Lookup chance="8" table="ShatteredWorld"/>
		</Table>
	</RareLifezonePlanets>

Then, let's say a Water World is generated...

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<WaterWorld>
		<Group>
			<Station type="&stWaterPlanet;"
					showOrbit="true"
				/>

			<Orbitals distance="2d6+10" angle="random">
				<Label attributes="planet,planetary"/>
			</Orbitals>

			<Orbitals distance="2d8+30" angle="random">
				<Table>
					<Null chance="50"/>
					<Group chance="35">
						<Lookup table="AsteroidMedium"/>

						<Orbitals distance="2d4+8" angle="random">
							<Label attributes="moon,planetary"/>
						</Orbitals>
					</Group>
					<Group chance="15">
						<Station type="&stCrateredPlanet;" showOrbit="true"/>

						<Orbitals distance="2d4+8" angle="random">
							<Label attributes="moon,planetary"/>
						</Orbitals>
					</Group>
				</Table>
			</Orbitals>

			<Trojan>
				<Group probability="10">
					<Orbitals count="1d4+4" distance="2d8+8" angle="random">
						<Lookup table="AsteroidSmall"/>
					</Orbitals>

					<Orbitals count="1d4" distance="2d8+8" angle="random">
						<Lookup table="AsteroidMedium"/>
					</Orbitals>

					<Orbitals count="1d3+1" distance="1d8+6" angle="random">
						<Label attributes="asteroids,trojan"/>
					</Orbitals>

				</Group>
			</Trojan>

			<AntiTrojan>
				<Group probability="10">
					<Orbitals count="1d4+4" distance="2d8+8" angle="random">
						<Lookup table="AsteroidSmall"/>
					</Orbitals>

					<Orbitals count="1d4" distance="2d8+8" angle="random">
						<Lookup table="AsteroidMedium"/>
					</Orbitals>

					<Orbitals count="1d3+1" distance="1d8+6" angle="random">
						<Label attributes="asteroids,trojan"/>
					</Orbitals>

				</Group>
			</AntiTrojan>

		</Group>
	</WaterWorld>

I figure I can either add "UniqueLifezonePlanets" to the "LifezonePlanets" table, probably giving it a chance of 1% and then create another sub-table for unique lifezone planets (though this could be problematic if...more likely when...I end up adding more than 100 unique planets), or I could add another table inside the "WaterWorld" section like this:

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<Table>
    <Station chance="95" type="&stWaterPlanet;" showOrbit="true" />
    <Lookup chance="5" table="UniqueWaterPlanets"/>
</table>

But either way, the question is still how to prevent those "unique" planets from being duplicated. Any thoughts on this?

[RPC]

You can't stop tables generating things IIRC.
The best way might be to log what planets spawn during system generation of every system and remove/replace them if a duplicate one shows up. If you can't make it I think I can cook one up for you to use.

[digdug]

Planets are stations. Stations have an attribute to make them system-unique or game-unique.
If you place the attribute on your unique planets, the RNG should take care of all the rest.

[Keedo420]

Exxxcellent! I mean, thank you. I was hoping it would be a simple solution. I'll try out the attribute thing. Of course, considering the rarity unique planets will have and the fact that I am currently testing things out with a single system, it might be a while before I have results.