The "How do I..." Thread

[NeuralStunner]

How do I make a non-automatic weapon or fire mode? As in, you can't simply hold down the button to keep firing, but must press it each time you want to shoot.

Put the NOAUTOFIRE flag on the weapon, then don't provide A_Refire at the end of the Fire sequence.

[NickPerrin]

Put the NOAUTOFIRE flag on the weapon, then don't provide A_Refire at the end of the Fire sequence.

I tried NOAUTOFIRE already , but it returns this:
"weapon.noautofire" is an unknown actor property

EDIT: Wait, figured it out. I checked gzdoom.pk3 and found the noautofire flag on the rocket launcher. What I couldn't figure out was that you need a '+' in front of it. Fixed.

[Project_Hellbane]

How would I make a sprite rotate using decorate? Like pick random between 360 degrees?

[amv2k9]

How would I make a sprite rotate using decorate? Like pick random between 360 degrees?

1. Name the sprite's different angles something like AGUYA0, B0, C0, etc.
2. Code up something like this:

Code: Select all • Expand view

States
{
Spawn:
 TNT1 A 0
 TNT1 A 0 A_Jump(256,"A","B","C","D","E","F","G","H")
 Wait
A:
 AGUY A 1
 Loop
B:
 AGUY B 1
 Loop
...

[NickPerrin]

I'm using A_FireCustomMissile and it's working just fine. However, It seems that every projectile the player fires with this spawns right inside the player. I'm wondering if there's a way to spawn a projectile using this action further away from the firing actor than default? (Useful for smoke, casings, rockets coming out of the tip of a barrel etc.)

I have tried some solutions. One can use TNT1 for the first few frames to make this invisible until it's in the right place and "pops in", but then your angle and pitch are not really where you want them by the time they get to the desired "pop-in" spot, and the speed may be wrong too. Alternatively, you can spawn a superfast invisible projectile that in turn spawns the slower, visible projectile, getting closer to the desired effect.

But is there a simpler way? Something that makes the projectile spawn a certain distance forward from the outset?

[Zombieguy]

How come this barrel won't play its "pain" sound? Well, it plays after its death state, but that's it. It also doesn't spawn the specified objects in its pain/wound state.

Spoiler:

Code: Select all • Expand view

ACTOR TechBarrel : ExplosiveBarrel replaces ExplosiveBarrel
{
   Health 20
   Radius 10
   Height 34
   +SOLID
   +SHOOTABLE
   +FLOORCLIP
   -DONTSPLASH
   //+PAINLESS
   +NOBLOOD
   +ACTIVATEMCROSS
   //+DONTGIB
   +NOICEDEATH
   +PUSHABLE
    +WINDTHRUST
   PainSound "world/barrelpain"
   Deathsound "world/barrelx"
   Scale 0.8
   States
   {
   Spawn:
      BAR1 A 0 A_Jump(20,14)
        BAR1 A 0 A_Jump(20,14)
        BAR1 A 0 A_Jump(20,14)
        BAR1 A 0 A_Jump(20,14)
        BAR1 A 0 A_Jump(20,14)
        BAR1 A 0 A_Jump(20,14)
        BAR1 A 0 A_Jump(20,14)
        BAR1 A 0 A_Jump(20,14)
        BAR1 A 0 A_Jump(20,14)
        BAR1 A 0 A_Jump(20,14)
        BAR1 A 0 A_Jump(20,14)
        BAR1 A 0 A_Jump(20,14)
          BAR1 ABCDEFGHIJKLM 2 Light("BarrelLight") A_SpawnItemEx("BarrelSpawners", 0, 0, 0, 0, 0, 0, 0, 0)
          Goto Spawn+14
      //Wait
      //
      Pain:
      //NULL A 0
      NULL A 0 A_Pain
      //NULL A 0 A_SpawnItemEx("BarrelJunky", Random(-2, 2), Random(-2, 2), Random(32, 36), (0.001)*Random(-200, 200), (0.001)*Random(-200, 200), (0.01)*Random(-200, 200), 0, 0, 8)
      BEXP ABBA 0 A_SpawnItem("SmokeSpawner11",0,30)
      BEXP ABBA 2 Light("BarrelLight") //A_SpawnItemEx("BarrelSpawners", 0, 0, 0, 0, 0, 0, 0, 0)
      Goto Spawn
   Wound:
      BAR1 A 0
      NULL A 0 A_Pain
      //NULL A 0 A_SpawnItemEx("BarrelJunky", Random(-2, 2), Random(-2, 2), Random(32, 36), (0.001)*Random(-200, 200), (0.001)*Random(-200, 200), (0.01)*Random(-200, 200), 0, 0, 8)
        BAR1 A 0 A_Jump(20,13)
        BAR1 A 0 A_Jump(20,13)
        BAR1 A 0 A_Jump(20,13)
        BAR1 A 0 A_Jump(20,13)
        BAR1 A 0 A_Jump(20,13)
        BAR1 A 0 A_Jump(20,13)
        BAR1 A 0 A_Jump(20,13)
        BAR1 A 0 A_Jump(20,13)
        BAR1 A 0 A_Jump(20,13)
        BAR1 A 0 A_Jump(20,13)
        BAR1 A 0 A_Jump(20,13)
        BAR1 A 0 A_Jump(20,13)
          BAR1 ABCDEFGHIJKLM 2 Light("BarrelWoundLight") A_SpawnItemEx("BarrelSpawnersWound", 0, 0, 0, 0, 0, 0, 0, 0)
          Goto Wound+15
      //
   Death:
      NULL A 0 A_Pain
        BEXP ABA 3 Light("BarrelLight") A_SpawnItemEx("BarrelSpawners", 0, 0, 0, 0, 0, 0, 0, 0)
      BEXP C 6 BRIGHT
        BEXP D 0 BRIGHT A_NoBlocking
        BEXP D 0 BRIGHT A_Explode
      //NULL A 0 A_StopSound(7)
      //NULL A 0 A_SpawnItem("ExploFogSpawner")
        BEXP D 0 BRIGHT A_SpawnItem("ExploFXSpawner",0,16)
      TNT1 A 0 A_Explode(180,160)
      TNT1 A 0 Radius_Quake(3,15,0,5,0)
      TNT1 A 0 A_SpawnItemEx("TechBarrelExplo",0,0,35,0,0,0,0,32)
      TNT1 A 0 A_SpawnItemEx("PBExplosionSpawnerHalf",0,0,35,0,0,0,0,32)
        //BEXP D 0 BRIGHT A_SpawnItem("BigSlowSmoke")
        //BEXP DDD 0 BRIGHT A_SpawnItemEx("AltSmokeXXL",0,0,8,0.03*Random(-50,50),0.03*Random(-50,50),0.01*Random(40,100),0,0,0)
        //BEXP DDD 0 BRIGHT A_SpawnDebris("Sparky")
      BEXP DDD 0 BRIGHT A_SpawnDebris("BarrelJunky")
      //NULL A 0 A_SpawnItem("BoomGreen")
      BEXP DD 0 BRIGHT A_SpawnDebris("ShootingFlameJunk")
        BEXP C 1 BRIGHT A_Scream
      //NULL A 0 A_SpawnItem("Boom")
      //NULL A 0 A_SpawnItem("BoomGreen")
      //TNT1 RSTRSTRSTRSTRSTRSTRSTRSTRSTRSTRSTRSTRSTRSTRSTRSTRSTRSTRSTRSTRSTRSTRSTRST 5 bright Light("BarrelDeadLight") A_SpawnItemEx("SlowSmoke",0,0,8,0.01*Random(-50,50),0.01*Random(-50,50),0.01*Random(40,100),0,0,136)
      TNT1 U -1 A_SpawnItem("BarrelRemains",1)
      TNT1 U 690 BRIGHT A_BarrelDestroy
       TNT1 U 5 A_Respawn
      //TNT1 AAAAAAAAAAAA 0 A_SpawnItemEx("FlmThrwrSmoke5",random(-20,20),random(20,-20),random(10,20),frandom(2,-2),0,frandom(0.3,1.5),random(1,360),32)
      TNT1 A 1 A_Scream
      Stop
   }
}


[FDARI]

It wasn't what I had in mind when I wrote it, but some kinds of placement are really hard to do with custom missile codes might actually be achieved with A_Warp. You can use A_Warp to jump forward and then jump back. Something like this:

Code: Select all • Expand view

fire: // version a) does not fire if player cannot move forward
  PLAY X 6 A_Warp(AAPTR_DEFAULT, 45,0,0,  0,  WARPF_INTERPOLATE, "InPositionToFire")
  // if you get here, the desired position was unavailable
  goto ready
inpositiontofire:
  PLAY X 0 A_FireCustomMissile("missile")
  PLAY X 4 A_Warp(AAPTR_DEFAULT, -45,0,0, 0, WARPF_INTERPOLATE | WARPF_NOCHECKPOSITION)
  // Nocheckposition means that you'll go back even if an obstruction has magically come along
  // You MAY want to avoid nocheckposition, and accept that the player was warped ahead instead, but I think not
  // ...

Code: Select all • Expand view

fire: // version b) warps, fires and returns
  PLAY X 0 A_Warp(AAPTR_DEFAULT, 45,0,0, 0, WARPF_INTERPOLATE | WARPF_NOCHECKPOSITION)
  PLAY X 0 A_FireCustomMissile("missile")
  PLAY X 4 A_Warp(AAPTR_DEFAULT, -45,0,0, 0, WARPF_INTERPOLATE | WARPF_NOCHECKPOSITION)
  // ...

AAPTR_DEFAULT means "self" in this instance, making the player jump to a position 45 units ahead of itself, and then from its new position to a position 45 units behind itself (or right back whence it came). WARPF_INTERPOLATE is used to preserve original interpolation info.

[Apothem]

How come this barrel won't play its "pain" sound? Well, it plays after its death state, but that's it. It also doesn't spawn the specified objects in its pain/wound state.

A wild guess would say that your pain chance isnt set on the actor. Or at least I dont see one, and I know that the barrel by default doesnt have one.

[Zombieguy]

Thanks a ton! Silly me, again.

[insightguy]

How do I make a block actor (For, ya know, blocking) that:

Can't deflect hit scans
Completely blocks any melee attacks and projectiles OR
(Preferably, but non necessarily due to possible limitations on the zdoom engine)
lessens the damage of melee attacks and projectiles

[cypherphage]

I want to make a weapon that weakens enemies with each hit, but its seems like powerprotection doesn't stack on monsters. It seems like I can 1 or 100 compies, and only the first has any effect.

Spoiler:

Code: Select all • Expand view

actor CurseDamage : PowerProtection   // and yes, the damage from the weapon is curse, I have gotten that part working
{Inventory.MaxAmount 100
damagefactor "curse", 1.5}

actor CurseUp : PowerupGiver
{inventory.maxamount 0
 powerup.type CurseDamage
 powerup.duration -7
 +AUTOACTIVATE
}

[oODemonologistOo]

How can I make a projectile go out for a few tics normally, then change its direction to the opposite of it's current ? I tried using thrustthing with angle paramater taken from decorate and put as "-angle" in the ACS, but that didn't work.

[cypherphage]

I don't think there is any need for acs, try "A_SetAngle(angel+180)".

[Snarboo]

I'm trying to think of a sane way to have ammo pickups that only give the player what they need so as to avoid situations where the player wastes an ammo pickup because they are nearly at full ammo. User variables and arguments seem like the best solution, but I can't remember if CustomInventory items support that feature. I'd really like to avoid using ACS if possible.

[Project_Hellbane]

How do you make translations?