Modify A_BrainExplode/A_BrainScream?

[Jekyll Grim Payne]

I'd like to use custom explosions but can't figure out a way to do so. I guess in a way A_SpawnItemEx could work, but I'm not sure what the position parameters should be, because the BossBrain actos is positioned at different angles in different versions of Icon of Sin (e.g. in Doom 2 it's facing 90 degrees away from the face wall, while in Plutonia they're facing the same direction, and in Evilution it's again 90 degrees, but in different direction).
Any advice would be appreciated.

[Mikk-]

The only way I could think would be to replace the BossBrain and its functions using ZScript. You could rewrite your own A_BrainScream, BrainishExplosion and A_BrainExplode - take a look at gzdoom.pk3's zscript/doom/bossbrain.txt

[Jekyll Grim Payne]

The only way I could think would be to replace the BossBrain and its functions using ZScript. You could rewrite your own A_BrainScream, BrainishExplosion and A_BrainExplode - take a look at gzdoom.pk3's zscript/doom/bossbrain.txt

I assumed so, but frankly I can't figure out what to change there. Zscript is still too confusing for me.

[Apeirogon]

replace the BossBrain and its functions using ZScript

Functions cant be replaced. Only way, change it in gzdoom.pk3

[Jekyll Grim Payne]

replace the BossBrain and its functions using ZScript

Functions cant be replaced. Only way, change it in gzdoom.pk3

Um, surely I can (could, if I knew the script better) write my own version of the function, then replace BossBrain and make it use that new function?

Code: Select all

	private static void BrainishExplosion(vector3 pos)
	{
		Actor boom = Actor.Spawn("Rocket", pos, NO_REPLACE);
		if (boom)
		{
			boom.DeathSound = "misc/brainexplode";
			boom.Vel.z = random[BrainScream](0, 255)/128.;

			boom.SetStateLabel ("Brainexplode");
			boom.bRocketTrail = false;
			boom.SetDamage(0);	// disables collision detection which is not wanted here
			boom.tics -= random[BrainScream](0, 7);
			if (boom.tics < 1) boom.tics = 1;
		}
	}

This part of extend class Actor should control which actor is used as the base for the explosion. However, I don't really understand how this extend thing works, or what does "boom" mean here, and how I should modify it to just spawn something like a simple NOINTERACTION explosion actor.

[Blue Shadow]

or what does "boom" mean here

boom is a pointer to the rocket which was spawned by the function. This pointer gives you access to that rocket actor to do whatever you want with it, like changing its variables, making it call functions on itself, and so on.

[Jekyll Grim Payne]

or what does "boom" mean here

boom is a pointer to the rocket which was spawned by the function. This pointer gives you access to that rocket actor to do whatever you want with it, like changing its variables, making it call functions on itself, and so on.

So, how can I replace just this part of A_BrainExplode so that it spawns a different object?

[Apeirogon]

"Boom" is means "spawn original doom rocket, which cant be replaced like 'new rocket:rocket replace rocket' ".

"boom.%_something_%" means "rocket part of a code with name %_something_%"

Like

Code: Select all

boom.DeathSound = "misc/brainexplode";

Means "rocket death sound eqaul, change to, misc/brainexplode, sound what you hear when romero head leave this better of the worlds"

Code: Select all

boom.bRocketTrail = false;

means "disable rocket trail for this rocket, more preciesly remove rockettreail flag"

Other lines means same as write after dot. Experiment with that, but if you want replace something provide something for replacing, since when engine reading zscript code and if they dong found thing for replace, it count it as critical error and refuses load furter.