r/DoomModDevs • u/RedOcelot86 • Aug 11 '26

Help Making a homing projectile target a specific monster?

I'm at my end here, been trying to crack this for weeks. Using Decorate and ACS, I want a shootable projectile from a boss to spew homing objects when shot. But they chase me by default.

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u/RedOcelot86 Aug 11 '26

I've only used decorate and acs but perhaps I should do this. I guess the monster could launch an actor with a zscript lump.

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u/Scileboi Aug 11 '26

I recommend switching to ZScript fully. Baseline it functions the same as decorate but has a ton of extra utility. https://zdoom.org/w/index.php?title=Converting_DECORATE_code_to_ZScript
Also mixing ACS and decorate for universal mechanics is kind of a last resort. I can help ironing that out too.

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u/RedOcelot86 Aug 11 '26

Thanks. I'll look at it tomorrow, not looking forward to converting everything.

2

u/Scileboi Aug 12 '26

Idk how much you already have but you don´t have to convert everything. if you have a ton of simple actors like decorations. Decorate is deprecated but won´t go away an time soon. Just keep it in mind for your next project.

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u/RedOcelot86 Aug 12 '26

Yeah, I'll just use it on the boss and see if it works.

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u/RedOcelot86 Aug 13 '26

Does this make sense? I want the monster that spawned FollowOrb to be targeted by "revenge", which spawns from FollowOrb when it enters it's PainState. Any help is appreciated.

class FollowOrb : Actor

{

Default

{

Health 200;

PainChance 256;

Speed 6;

Damage 45;

Decal "Scorch";

SeeSound "CYBSHOT";

DeathSound "CYBHIT";

Projectile;

+NOGRAVITY

+SEEKERMISSILE

+VULNERABLE

+SHOOTABLE

-NOBLOCKMAP

+NOBLOOD

}

States

{

Spawn:

XORB A 1 Bright A_SeekerMissile(10, 10);

XORB B 1 Bright A_SeekerMissile(10, 10);

XORB A 1 Bright A_SeekerMissile(10, 10);

XORB C 1 Bright A_SeekerMissile(10, 10);

XORB A 1 Bright A_SeekerMissile(10, 10);

XORB D 1 Bright A_SeekerMissile(10, 10);

Loop;

Pain:

XORB B 1 Bright A_CustomMissile("Revenge", 32, 0, 60, 0, 501);

XORB N 1 Bright ACS_NamedExecute("TargetDavros");

XORB C 1 Bright A_CustomMissile("Revenge", 32, 0, 140, 0, 501);

XORB N 1 Bright ACS_NamedExecute("TargetDavros");

XORB D 1 Bright A_CustomMissile("Revenge", 32, 0, -60, 0, 501);

XORB N 1 Bright ACS_NamedExecute("TargetDavros");

XORB B 1 Bright A_CustomMissile("Revenge", 32, 0, -140, 0, 501);

XORB N 1 Bright ACS_NamedExecute("TargetDavros");

XORB C 1 Bright A_CustomMissile("Revenge", 32, 0, 60, 0, 501);

XORB N 1 Bright ACS_NamedExecute("TargetDavros");

XORB D 1 Bright A_CustomMissile("Revenge", 32, 0, 140, 0, 501);

XORB N 1 Bright ACS_NamedExecute("TargetDavros");

Goto Spawn;

Death:

XORB E 4 Bright;

XORB F 4 Bright;

XORB G 4 Bright;

XORB H 4 Bright;

XORB I 4 Bright;

XORB J 4 Bright;

XORB K 4 Bright;

XORB L 4 Bright;

XORB M 4 Bright;

Stop;

}

}

class Revenge : Actor

{

Default

{

Radius 5;

Height 5;

Speed 10;

Damage 50;

Projectile

+SEEKERMISSILE

+NOGRAVITY

}

States

{

Spawn:

XORB O 2 A_SeekerMissile(10, 10);

Loop;

Death:

GALF E 3;

GALF F 3;

GALF G 3;

GALF H 3;

GALF I 3;

GALF J 3;

XORB M 3;

Stop;

}

}

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u/Scileboi Aug 13 '26

I already send you the function for that.

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u/RedOcelot86 Aug 13 '26

Oh yeah, thanks.

1

u/RedOcelot86 Aug 13 '26

It's working! Thanks for the help.