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Hello. I blatantly wrote to  Jecrell to ask about this, but I would like to ask here too.
A new modder here, I studied XML of the game already so I have no issue adding things into the game, but I need to learn how to make incidents now to make somewhat interesting mods.

My first one is aliens/predator mod, so it does need some coding to add the features like alien attacks and predator spawning.


I am currently struggling with basic stuff: how to spawn a pack of pawns of some kind and make them attack the colony through an incident.

If I understand correctly, from what I've seen in Jecrells' code, I need:
1) Make a variable for a PawnKind which find the PawnKind from XML:
varKind = PawnKindDef.Named("Xenomorph");
2) Make a variable for a faction to assign the pawn to:
varFac = Find.FactionManager.FirstFactionOfDef(FactionDef.Named("Aliens"));
3) Make a variable out of PawnGenerator class to get the pawn itself:
varPawn = PawnGenerator.GeneratePawn(varKind, varFac);

Now I just need to force it to find a suitable spawn location and spawnpawns there.

Code Select Expand


public override bool TryExecute(IncidentParms parms)
{
       <variable declaration>
       FindSpawnLoc(parms); // locate where to spawn creatures
       SpawnAliens(parms); // call the function to spawn the aliens
}


This is where I run into issues.
Jecrell seems to use:
iwLoc       = CellFinder.RandomClosewalkCellNear(parms.spawnCenter, ;
https://ludeon.com/forums/index.php?topic=26373.msg266952#msg266952

However my compiler complains that CellFinder.RandomClosewalkCellNear needs 3 parameters and "map" is missing from those.
Can someone help me to figure out why it works for Jecrell and my compiler does not work with it? I can find the definition of this in the metadata:
public static IntVec3 RandomClosewalkCellNear(IntVec3 root, Map map, int radius);

So there seems to be 3 parameters. I have no idea how to get the "Map" to pass to it. Am I doing something completely wrong? I hope that my concern is understood . Thank you in advance.


P.S. A secondary question would be how to make the pawns of a "manhunter" type. I assume there's a simple variable you can flick, but I could not find where to look for it. Is there a "full source code" somewhere I can look up?

I have started slowly composing together a mod which implements xenomorphs and predators in to Rimworld universe.
The progress is slow since this is my first mod. I figured out how to add xenos to the game and make them spawn naturally.

The base spritework is done:

Warrior:


Runner:


Queen (WIP):


So far they are based on megaspider and do not have a unique body yet, but they work well in the game already as enemy pawns.



It will take a while since I just learn to mod, but I promise to playtest it and deliver it in a working form.
If someone who already knows modding well is willing to help with minor stuff (template for incident for example), I would greatly appreciate it.

To do (development order):

- Create sprites for xenomorphs.
- Make a pawn for xenormorphs.
- Create ranged "acid" natural weapon.
- Create an incident.
- Create sprites and make different types of xenomorphs (warrior, runner, queen etc).
- Create custom body.
- Create custom AI for aliens.
- Create sprites for predator.
- Create sprites for predator mask/spear.
- Figure out how to make predators/aliens invisible until colonists encounter them.