The "How do I..." Thread

[cocka]

Please bear in mind that the function won't return the first power of the number.

If kitevo (power in Hungarian) is 1, the result will be second power of the given number.

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int eredmeny = FixedMul(alap, alap);

So 1 will represent the second power of the number.
2 the 3., 3 the 4. etc..

You can solve this problem with an extra if condition in the function.

[MadTux]

New "How do I?":
Is there a way for a new actor to replace two weapons? I have a new weapon, and I want it to replace the Chainsaw and the SSG

[Mikk-]

Would this work? Uses the [wiki]WeaponGiver[/wiki] actor.

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ACTOR NewWeapon replaces Chainsaw
{
	[Your code goes here]
}

ACTOR NewWeapon2 : WeaponGiver replaces Supershotgun
{
	DropItem "NewWeapon"
	States
	{
	Spawn:
		GUN1 A -1
		stop
	}
}

[MadTux]

Ah -- didn't know about that one. It seems to work perfectly. Thanks.

[SouthernLion]

how do I make it so that both have to die for the event to unfold?

It depends. Basically there are two ways to do that.

1. Assign the same tid for each of the monsters and an event (a script).

Example:

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if(!ThingCount(T_NONE, <yourmonsters' tid>))
{
 // something will happen
}

2. Assign the same tid for each of the monsters, BUT now place a line or a "thing executed special" next to the place where you have the monsters and invoke the event with that line/object.

Example:

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until(!ThingCount(T_NONE, <yourmonsters' tid>))
{
  delay(3);
}
// then do something else

OR you can also use

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while(ThingCount(T_NONE, <yourmonsters' tid>))

. That's all.

The second option is archiproof therefore it's better when there might be some resurrected monsters.

I'm not getting it to work. I have both zombies set as tag "4" and the sector to open as a door is "5". Then, this is my script for my level:

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#include "zcommon.acs"

script 1 ENTER
{
    Scroll_Floor (2, 0, -20, 2);
} 

script 2 ENTER
{
    if(!ThingCount(T_NONE, 4))
    {
    Door_Open(5,50);
    }
}

Am I failing at coding correctly?

[cocka]

Am I failing at coding correctly?

Yes, you are.

Code: Select all

script 2 ENTER

Why do you want to start the script right at the loading of the map?! You have to assign an event (ACS_Execute) to the tagged monsters.

Use script 2 (void) or (int tid, int tag) instead and make sure you have set the script for the tagged monsters.

Not the player but the monster has to be the activator!

Your script can be interpreted like this:

Right at the beginning of the map let's count how many monsters there are with tag 4. Well, you'll get a number greater than 0. So your if condition will be false and nothing will happen.

[SouthernLion]

Am I failing at coding correctly?

Yes, you are.

Code: Select all

script 2 ENTER

Why do you want to start the script right at the loading of the map?! You have to assign an event (ACS_Execute) to the tagged monsters.

Use script 2 (void) or (int tid, int tag) instead and make sure you have set the script for the tagged monsters.

Not the player but the monster has to be the activator!

Your script can be interpreted like this:

Right at the beginning of the map let's count how many monsters there are with tag 4. Well, you'll get a number greater than 0. So your if condition will be false and nothing will happen.

Can you elaborate on what you mean by that?

EDIT: NVM, I just got it to work. Ty for the help, I'm still new to code. lol

[xenoxols]

No matter what I do, I cant seem to get this projectile to drop.

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actor holywater
{
    +FORCEXYBILLBOARD
	-nogravity	
	+LOOKALLAROUND
	+RIPPER
	-Randomize
	Radius 11
	Height 8
	Speed 15
	Scale 1
	Damage (2)
	Gravity 2.00
	Projectile
	states
	{
	spawn: 
		HPP4 A 1
		loop
	death:
		TNT1 A 0 a_playsound ("subweapons/holywaterhit")
		HFIR A 3 bright A_Explode(70,120,120)
		HFIR B 3 bright A_Explode(70,120,120)
		HFIR C 3 bright A_Explode(70,120,120)
		HFIR D 3 bright A_Explode(70,120,120)
		HFIR C 3 bright A_Explode(70,120,120)
		HFIR B 3 bright A_Explode(70,120,120)
		HFIR A 3 bright A_Explode(70,120,120)
		stop
	Crash:
		TNT1 A 0 a_playsound ("subweapons/holywaterhit")
		HFIR A 3 bright A_Explode(70,120,120)
		HFIR B 3 bright A_Explode(70,120,120)
		HFIR C 3 bright A_Explode(70,120,120)
		HFIR D 3 bright A_Explode(70,120,120)
		HFIR C 3 bright A_Explode(70,120,120)
		HFIR B 3 bright A_Explode(70,120,120)
		HFIR A 3 bright A_Explode(70,120,120)
		stop
	xdeath:
		TNT1 A 0 a_playsound ("subweapons/holywaterhit")
		HFIR A 3 bright A_Explode(70,120,120)
		HFIR B 3 bright A_Explode(70,120,120)
		HFIR C 3 bright A_Explode(70,120,120)
		HFIR D 3 bright A_Explode(70,120,120)
		HFIR C 3 bright A_Explode(70,120,120)
		HFIR B 3 bright A_Explode(70,120,120)
		HFIR A 3 bright A_Explode(70,120,120)			
		stop
		}
}

[Gez]

No matter what I do, I cant seem to get this projectile to drop.

Put the Projectile combo before the flags.

DECORATE parsing is done linearly. If two or more lines conflict, the last one wins. So if you have the following sequence:

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-NOGRAVITY
+NOGRAVITY

It is the last line which wins.

[wiki=Actor properties#Projectile]Projectile[/wiki] gives a set of flags, among which is NOGRAVITY. Since it is placed after your -NOGRAVITY line, it wins, and your missile has +NOGRAVITY set.

[xenoxols]

Thanks gez, that works, however A_Explode doesn't appear to be doing anything.
Updated Code.

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actor holywater
{
	Projectile
    +FORCEXYBILLBOARD
	-nogravity	
	+LOOKALLAROUND
	+RIPPER
	-Randomize
	-Solid
	Radius 11
	Height 8
	Speed 12
	Scale 1
	Damage (6)
	Gravity 0.80
	states
	{
	spawn: 
		HPP4 A 1
		loop
	death:
		TNT1 A 0 a_playsound ("subweapons/holywaterhit")
		HFIR A 3 bright A_Explode(20,120,120)
		HFIR B 3 bright A_Explode(10,120,120)
		HFIR C 3 bright A_Explode(20,120,120)
		HFIR D 3 bright A_Explode(10,120,120)
		HFIR C 3 bright A_Explode(20,120,120)
		HFIR B 3 bright A_Explode(10,120,120)
		HFIR A 3 bright A_Explode(20,120,120)
		stop
	Crash:
		TNT1 A 0 a_playsound ("subweapons/holywaterhit")
		HFIR A 3 bright A_Explode(20,120,120)
		HFIR B 3 bright A_Explode(10,120,120)
		HFIR C 3 bright A_Explode(20,120,120)
		HFIR D 3 bright A_Explode(10,120,120)
		HFIR C 3 bright A_Explode(20,120,120)
		HFIR B 3 bright A_Explode(10,120,120)
		HFIR A 3 bright A_Explode(20,120,120)
		stop
	xdeath:
		TNT1 A 0 a_playsound ("subweapons/holywaterhit")
		HFIR A 3 bright A_Explode(20,120,120)
		HFIR B 3 bright A_Explode(10,120,120)
		HFIR C 3 bright A_Explode(20,120,120)
		HFIR D 3 bright A_Explode(10,120,120)
		HFIR C 3 bright A_Explode(20,120,120)
		HFIR B 3 bright A_Explode(10,120,120)
		HFIR A 3 bright A_Explode(20,120,120)			
		stop
		}
}

[jpalomo]

The third argument for A_Explode is a flags field. You can use a number to represent the flags if you want (I believe the flags for A_Explode can only be 0, 1, 4, or 5), but that is not recommended. Instead, use the names you want like so:

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A_Explode (20, 120, XF_HURTSOURCE|XF_NOTMISSILE)

| is used to combine multiple flags.

[xenoxols]

Thanks, and I have ANOTHER question.(sorry) How could I make A projectile that circles around the player?

[GhostKillahZero]

How could I make A projectile that circles around the player?

[wiki]A_Warp[/wiki]

[ArchXeno]

How can I make this weapon fire in a circular arrangement? I don't quite understand how to customize A_FireCustomMissile, as the wiki page is pretty vague.

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vhnd e 0 a_firecustommissile("FrostShot1",-2,0,4,5,0,3)
	vhnd e 0 a_firecustommissile("FrostShot1",-3,0,-4,5,0,3)
	vhnd e 0 a_firecustommissile("FrostShot1",0,1)
	vhnd e 0 a_firecustommissile("FrostShot1",3,0,-4,-5,0,3)
	vhnd e 0 a_firecustommissile("FrostShot1",2,0,4,-5,0,3)

[Blue Shadow]

The angle parameter is what you want to achieve that. Try this example (you can copy the code, paste it in a text file which is called decorate and drag-and-drop it onto zdoom.exe to test):

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ACTOR NewPlasmaRifle : PlasmaRifle
{
  Weapon.SlotNumber 6
  States
  {
  Fire:
    TNT1 A 0 A_GunFlash
    PLSG A 0 A_FireCustomMissile("PlasmaBall", 20, FALSE)
    PLSG A 0 A_FireCustomMissile("PlasmaBall", 40, FALSE)
    PLSG A 0 A_FireCustomMissile("PlasmaBall", 60, FALSE)
    PLSG A 0 A_FireCustomMissile("PlasmaBall", 80, FALSE)
    PLSG A 0 A_FireCustomMissile("PlasmaBall", 100, FALSE)
    PLSG A 0 A_FireCustomMissile("PlasmaBall", 120, FALSE)
    PLSG A 0 A_FireCustomMissile("PlasmaBall", 140, FALSE)
    PLSG A 0 A_FireCustomMissile("PlasmaBall", 160, FALSE)
    PLSG A 0 A_FireCustomMissile("PlasmaBall", 180, FALSE)
    PLSG A 0 A_FireCustomMissile("PlasmaBall", 200, FALSE)
    PLSG A 0 A_FireCustomMissile("PlasmaBall", 220, FALSE)
    PLSG A 0 A_FireCustomMissile("PlasmaBall", 240, FALSE)
    PLSG A 0 A_FireCustomMissile("PlasmaBall", 260, FALSE)
    PLSG A 0 A_FireCustomMissile("PlasmaBall", 280, FALSE)
    PLSG A 0 A_FireCustomMissile("PlasmaBall", 300, FALSE)
    PLSG A 0 A_FireCustomMissile("PlasmaBall", 320, FALSE)
    PLSG A 0 A_FireCustomMissile("PlasmaBall", 340, FALSE)
    PLSG A 3 A_FireCustomMissile("PlasmaBall")
    PLSG B 20 A_ReFire
    Goto Ready
  }
}