The "How do I..." Thread

[lwks]

My error:

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Execution could not continue.

Script error, "Hellspawn v1.x.wad:DECORATE" line 58:
Expected ')', got '=='.

My code

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actor MinionRevenant : Revenant replaces Revenant
{
  DropItem "RocketAmmo"
  States
  {
  Death:
    SKEL LM 7
    SKEL N 7 A_Scream
	SKEL N 0
	{
		if (GetCVAR(hs_hierarchy == 1)) {      //LINE 58 IS HEAR \o/
			A_SpawnItemEx("ChaingunGuySpawner",0,0,0,0,0,0);
		} if (GetCVAR(hs_hierarchy == 2)) {
			A_SpawnItemEx("ShotgunGuySpawner",0,0,0,0,0,0);
		}
	}
    SKEL O 7 A_NoBlocking
    SKEL P 7
    SKEL Q -1
    Stop
  }
}

Nice error I got here
Some1 can help me?
Thanks in advance

[Matt]

---

I suddenly remembered [wiki]A_RadiusGive[/wiki] so no "long convoluted hack" is necessary! (just lots of looking up arbitrarily named flags)

In the BFG ball, do something like this (I'll use "----" A because I don't know which frame you want this in):

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		"----" A 0 A_RadiusGive(
			"PlayerBFGBlender",
			256, //adjust numbers to taste
			RGF_PLAYERS //of course
			|RGF_CUBE //purely aesthetic so why waste time on square roots?
		)

and then define the following actor:

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actor PlayerBFGBlender:CustomInventory{
	states{
	spawn:
		TNT1 A 1 //we don't want these lying around
		stop
	pickup:
		TNT1 A 0 A_SetBlend(...) //do the thing and go away
		fail
}

Still not working. It will do the effect when the BFG ball spawns but not when it explodes.

BFG projectile

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ACTOR NewBFGBall : BFGBall Replaces BFGBall
{
        Scale 1.25
	Radius 13
	Height 8
	Speed 25
	Damage 100
	Projectile
	+RANDOMIZE
        +FORCERADIUSDMG
	RenderStyle Add
	Alpha 0.75
	DeathSound "weapons/bfgx"
	Obituary "$OB_MPBFG_BOOM"
	States
	{
	Spawn:
		BFS1 AB 4 bright
		Loop
	Death:
		BFE1 AB 0 bright A_RadiusGive ("PlayerBFGBlender", 256, RGF_PLAYERS, 5)
		BFE1 AB 8 bright
		BFE1 C 8 bright A_BFGSpray
		BFE1 DEF 8 bright
		Stop
	}
}

Effect

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actor PlayerBFGBlender : CustomInventory
{
   states
   {
   spawn:
      TNT1 A 1
      stop
   pickup:
      TNT1 A 0 A_SetBlend ("Green",0.75,14)
      fail
   }
}

This is what I did. I'm guessing I'm missing something?

I copypasted your code without any changes and summoned the ball. It worked exactly as I thought.

Remember, unless you change that number you have to be within 256 units of the ball when it explodes for it to work. (Now that I try it out it seems a little close, so maybe 512-1024?)

Also, why are you giving it 10 times? (2 zero-length frames both calling it, each one giving 5 of the items at once)

[worldendDominator]

Nice error I got here
Some1 can help me?
Thanks in advance

I think it should be like this:

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if (GetCVAR(hs_hierarchy) == 1)

[Gez]

just wondering if it is possible or not.

I've noticed that if you use PNG for your player's sprite, it will automatically be changed to the Doom's palette in order for the green color to be changed.
I've also noticed when monsters from other games, such as Duke's Assault Trooper & Captain they can not be palette translated with a code, or the same thing would happen, so they would both need their own separate sprites in order to have their correct original color.

So I wonder, since SLADE has palettes for many games, why can they not be included with GZDoom? And with a tag on the actor would be something like:

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SetPalette "Name of Game"

This would assign that sprite to the colors of that chosen palette so that they can now be translated correctly, and of course the same thing can be done with the player with ColorRange.

Having a "palette" property for actors was an item for the long-abandoned doom64 branch, because that's how that game does it -- the baron and hell knights, for example, use the exact same sprites, but a different palette.

As for including palettes in GZDoom -- no need. If and when multiple palette support is added, then it'll be up to each mod to include the palettes they need.

[Graf Zahl]

In the context of ZDoom, a 'palette' could simply be implemented by allowing to load translations from some form of graphics file instead of defining them as ranges.

[Expect No Mercy]

I think this is doable...

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HealThing(Random(0,100))

Doh! Such simple.
Thanks!

[TheRailgunner]

How do I make a double-jump for a player?

[DoomKrakken]

I've seen examples in both Parkmore (which has a double jump) and Guncaster (which has 4-12 jumps). Maybe look in there?

If you're looking through Guncaster, I'd suggest looking through GUNCASTER.acs.

I think this is doable...

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HealThing(Random(0,100))

Doh! Such simple.
Thanks!

No problem.

[TheRailgunner]

I've seen examples in both Parkmore (which has a double jump) and Guncaster (which has 4-12 jumps). Maybe look in there?

If you're looking through Guncaster, I'd suggest looking through GUNCASTER.acs.

Honestly, no part of the Guncaster double jump code makes sense to me - I'm trying to get this to work, but I can't get it to detect the jump or trigger only when pressed, not held:

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script "DoubleJump" ENTER {	
	int input = GetPlayerInput(-1, INPUT_BUTTONS);
	int a_jumps = 0;
	//int input;
	While(1) {
		Delay(1);
		if ((input & BT_JUMP) & (GetActorVelZ((1000 + PlayerNumber())) != 0)) {
				a_jumps++;
				//SetAJumpVel();
				//SetActorProperty(0, APROP_Gravity, 0.94);
				//SetActorVelocity(0, 0, 0, 16.0, 0, 0);
				ThrustThingZ((1000 + PlayerNumber()),12,0,0);
				Delay(1);
		}
	}
}

[Zan]

Hey, everyone, I am working on the gorey structure of my game, and realised that rendering blood is not that simple. Moreover, I am unsure of what options I even have at my disposal.

In your opinion, what is the most satisfying form of rendering and implementing blood? I'm talking about both the graphical aspect and the implementation one.

From what I understand, Doom has 3 blood sprites which it just pops according to the amount of damage dealt. However, I read on wiki that Zdoom also allows for blood splats to stick to walls and stuff. How do you modify those? (For example, if I want to create an animated blood sprite and give it some X/Y/Z momentum, how do I tell the engine to use it when the monster is hit? Also, how to I change the graphic decals of wall splats?)

And generally, if someone knows anything important about this topic, I'd be grateful for some info before I dive into it.

[Matt]

detect the jump or trigger only when pressed, not held:

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int oldinput = GetPlayerInput(-1, MODINPUT_OLDBUTTONS);
...
if ((input & BT_JUMP) && (!(oldinput & BT_JUMP)))

I'd recommend using MODINPUT for the current input as well:

The MODINPUT_* series check the values after they have been processed by the game engine. These may be different if, for example, the player is fully or partially frozen (Movement inputs will be nulled) or is using a weapon such as the chainsaw which alters the player's input to include forward movement.

[Nevander]

How do you give an obituary to a projectile fired through ACS in a map? I have both Obituary and HitObituary defined on the projectile itself which I imagine should be working, but it always says that I "died" when they kill me.

[Namelessdeity]

Using the +WALLSPRITE variable, how can I make a stop sign and not have the back of the sprite being a reverse image of the main sprite?
Something like this

[ZZYZX]

Two wallsprites. One displays front, another back.
The problem here however is that we don't have a flag that makes wallsprites draw only the front side (unless we do).

The closest for road signs (i.e. wallsprites that are not aligned by pitch, only rotated at most) would be this: https://zdoom.org/wiki/Actor_properties#VisibleAngles

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        +MASKROTATION;
        VisibleAngles -90, 90;
        VisiblePitch -180, 180;

If you want it to work reliably with any actor pitch, you'd need to calculate it yourself with arcane vector maths and use this action.

Alternatively you can also use sprite rotations and make frame 1 (forward) the front side, and frame 5 (back) the back side. Not sure if ZDoom allows incomplete frame sets though (only 1 and 5), and that will also be buggy if you modify wallsprite's pitch/roll. Not sure if ZDoom allows sharp transition between front and back side either, because with regular 1-5 sprite frames the 90 degree angle would always be represented using '3'.

I personally like VisibleAngles/VisiblePitch approach more in this case.

[Nevander]

What I would do personally is to make the front and back side into a transparent mid-texture, and then in-map draw a 32 unit wide (or however wide) line where I want the sign to be and then give the right sides the front or back side of the sign, then make the line impassible.