The "How do I..." Thread

[Stardust]

APROP_DamageFactor in SetActorProperty is the generic damage factor, and isn't supposed to control the damage factor of any specific damage types. In-fact, it even explains this to you on the very wiki page you linked to:

Generic damage factor for the actor.

Thanks for answering, edward.
Uguu, that's too bad... from what I learnt about your informations, it looks like I couldn't make an item (an elemental shield) that, when used, will reduce of 60% every fire attacks (every fire-related damagetypes) that hurt the actor.. right ?
Also, on another hand, I can't even get the generic damages working. Here is the code I used :

Code: Select all

script 355 (void)
{
	SetActorProperty(0, APROP_DamageFactor, 0);
}

It's not a question of "the script isn't loaded", it works when I try with APROP_Gravity. I compiled this text above (that is supposed to multiply damages by 0, so... it turns them useless against the actor, obviously), and my actor still gets the original damages...

[edward850]

Seeing as you are using TID 0 (the activator of the script), what's activating script 355? Testing that code exactly works as expected for myself.

[Stardust]

The one activating script 355 is... the player. When he/she uses the shield item, he/she calls script 355.
And it worked with APROP_Gravity, so I know the script is correctly called.

[edward850]

I'm not sure what you could be doing wrong, so I wipped up an example that I know works. Doonluud heer.
The Cacodemon is set to a DamageFactor of 0 on map-spawn, and the player can set themselves to a DamageFactor of 0 by using the switch.

[Stardust]

Ah, ah, I see... thanks. It actually works now.
But furthermore, I can't alter any specific DamageFactors, right ? I can only modify the generic (a.k.a every damages) one ?

[edward850]

But furthermore, I can't alter any specific DamageFactors, right ?

You could if you wanted to make a powerup, for example.

[Stardust]

....oh. Ho. Hahah. Hah. UGUUUURG-
I should have checked this first, sigh. If I would have known more about item classes, I would have used this... but I learnt that scripts aren't always the solution. Thanks for all that edward, my problem is solved~

[Scripten]

Back here again for something a little weird. I'm working on making a chargeable plasma gun with three levels of charge. It seems to work alright with one level, but... well, when I add in any more levels, GZDoom crashes. It doesn't even show the error reporting window. Here's all the relevant code:

Code: Select all

ACTOR ChargeCounter : Inventory
{
  Inventory.MaxAmount 30
  Inventory.InterHubAmount 0
  + INVENTORY.INVBAR
}

ACTOR ChargeBeam : PowerBeam
{
  Tag "Charge Beam"
  States
  {
  Fire:
    MISG B 0 A_PlaySound("vile/firestrt")
    MISG B 2
    MISG B 2 
    MISG B 0 A_JumpIfInventory("ChargeCounter", 10, "Charge1")
    MISG B 0 A_GiveInventory("ChargeCounter", 1)
    MISG B 0 A_ReFire
    MISG B 8 A_FireCustomMissile("ChargeShot")
    MISG B 0 A_TakeInventory("ChargeCounter", 9999)
    goto Ready
    Charge1:
    MISG B 0 A_JumpIfInventory("ChargeCounter", 20, "Charge2")
    MISG B 0 A_GiveInventory("ChargeCounter", 1)
    MISG B 0 A_ReFire("Charge1")
    MISG B 2 A_FireCustomMissile("ChargeShot1")
    MISG B 0 A_TakeInventory("ChargeCounter", 9999)
    goto Ready
    Charge2:
    MISG B 0 A_JumpIfInventory("ChargeCounter", 30, "Charge3")
    MISG B 0 A_GiveInventory("ChargeCounter", 1)
    MISG B 0 A_ReFire("Charge2")
    MISG B 2 A_FireCustomMissile("ChargeShot2")
    MISG B 0 A_TakeInventory("ChargeCounter", 9999)
    goto Ready
    Charge3:
    MISG B 0 A_ReFire("Charge3")
    MISG B 4 A_FireCustomMissile("ChargeShot3")
    MISG B 0 A_TakeInventory("ChargeCounter", 9999)
    goto Ready
  }
}

actor ChargeShot : PlasmaBall
{
  Translation "192:207=168:191", "241:241=189:189"
  Scale 1.1
  Damage 2
}

actor ChargeShot1 : ChargeShot
{
  Translation "192:207=208:223", "241:241=234:234"
  Scale 1.4
  Damage 6
}

actor ChargeShot2 : ChargeShot
{
  Translation "193:198=226:231", "199:207=161:164", "241:241=164:164"
  Scale 1.6
  Damage 10
}

actor ChargeShot3 : ChargeShot
{
  Translation "192:207=192:197", "241:241=197:197"
  Scale 2
  Damage 15
}

Is this something that I'm doing wrong, or am I just looking at a GZDoom bug? (I've only just started on Decorate, so I haven't a clue.)

Edit: After taking a closer look, it happens exactly when I jump to the "Charge1" state after charging 10 units of the ChargeCounter item. If the fire button is immediately let go of, the ChargeShot1 projectile is fired, but if the A_Refire command is reached, GZDoom crashes.

Edit2: I got this working using the depreciated A_JumpIfInventory, using just an integer value. Even so, I'd like to have the code be as clean and up-to-date as possible. Plus, if it's a bug...

[jpalomo]

Just from a quick glance at your code, you don't seem to have any tics during your Charge states before A_Refire is called. Put 1 on A_GiveInventory and it should work. Also, Charge3 has an infinite 0 tic loop with A_Refire. Ran into this same issue with my mod.

[Scripten]

Aha. That's what was happening. Everything works perfectly now. Many thanks!

---

Code: Select all

ACTOR ChargeBeam : PowerBeam
{
  Tag "Charge Beam"
  States
  {
  Fire:
    MISG B 0 A_PlaySound("vile/firestrt")
    MISG B 2
    MISG B 1 A_JumpIfInventory("ChargeCounter", 10, "Charge1")
    MISG B 0 A_GiveInventory("ChargeCounter", 1)
    MISG B 0 A_ReFire
    MISG B 6 A_FireCustomMissile("ChargeShot")
    MISG B 0 A_TakeInventory("ChargeCounter", 9999)
    goto Ready
    Charge1:
    MISG B 0 A_PlaySound("vile/firestrt")
    MISG B 1
    MISG B 1 A_JumpIfInventory("ChargeCounter", 20, "Charge2")
    MISG B 0 A_GiveInventory("ChargeCounter", 1)
    MISG B 0 A_ReFire("Charge1")
    MISG B 2 A_FireCustomMissile("ChargeShot1")
    MISG B 0 A_TakeInventory("ChargeCounter", 9999)
    goto Ready
    Charge2:
    MISG B 0 A_PlaySound("vile/firestrt")
    MISG B 1
    MISG B 1 A_JumpIfInventory("ChargeCounter", 30, "Charge3")
    MISG B 0 A_GiveInventory("ChargeCounter", 1)
    MISG B 0 A_ReFire("Charge2")
    MISG B 2 A_FireCustomMissile("ChargeShot2")
    MISG B 0 A_TakeInventory("ChargeCounter", 9999)
    goto Ready
    Charge3:
    MISG B 0 A_PlaySound("vile/firestrt")
    MISG B 1
    MISG B 1 A_ReFire("Charge3")
    MISG B 4 A_FireCustomMissile("ChargeShot3")
    MISG B 0 A_TakeInventory("ChargeCounter", 9999)
    goto Ready
  }
}

[Sgt. Shivers]

How do I choose what sounds play when the player exits the game?

[zrrion the insect]

Code: Select all

gameinfo
{
quitsound = "TheSoundYouWantHere"
}

[Sgt. Shivers]

Code: Select all

gameinfo
{
quitsound = "TheSoundYouWantHere"
}

Thanks!

[Ravick]

How do I give to a monster with a projectile attack some chance to miss its target?

[cypherphage]

Depends, first way is to use the angle property of A_CustomMissile; Secondly, something like "TNT1 A 0 A_SetAngle(angle + random(-5,5))" after A_FaceTarget but before attacking will also do the trick.