The "How do I make a weapon do that?" thread

[TheDoc]

How would I make a projectile die after it stops moving across the x-axis? I'm making a projectile that slows to a stop in the same manner of Quick Boomerang, then dies (I had to time A_Countdown perfectly), but the problem is if I shoot it upwards, it goes backwards before stopping. So I tried saying

Code: [Select]

A_JumpIf(momx==0,"Death")but it just skipped past it completely and flew backwards into the wall. Shouldn't momx have worked?

[tsukiyomaru0]

How would I make a projectile die after it stops moving across the x-axis? I'm making a projectile that slows to a stop in the same manner of Quick Boomerang, then dies (I had to time A_Countdown perfectly), but the problem is if I shoot it upwards, it goes backwards before stopping. So I tried saying

Code: [Select]

A_JumpIf(momx==0,"Death")but it just skipped past it completely and flew backwards into the wall. Shouldn't momx have worked?

Use A_ScaleVelocity to gradually cause it so slow, then use A_JumpIf(1>momx>-1 && 1>momy>-1 && 1>momz>-1, "death") after or before every frame that scales velocity. Not sure if the jumpif example here works, I'll test later

EDIT: Didn't work. But this one did:

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ATBU A 1 A_ScaleVelocity(0.90)
ATBU A 0 A_JumpIf(5>momx && 5>momy && 5>momz,"Death")
ATBU A 0 A_JumpIf(momx>-5 && momy>-5 && momz>-5,"Death")

EDIT2: This one ALSO worked:

Code: [Select]

ATBU A 1 A_ScaleVelocity(0.90)
ATBU A 0 A_JumpIf(momx*momx<1 && momy*momy<1 && momz*momz<1,"Death")


[TheDoc]

EDIT2: This one ALSO worked:

Code: [Select]

ATBU A 1 A_ScaleVelocity(0.90)
ATBU A 0 A_JumpIf(momx*momx<1 && momy*momy<1 && momz*momz<1,"Death")

So I did this one (bcuz it looked like the same thing you put earlier except shorter) except I took out the momy and momz parts bcuz it should be allowed to be fired in the air (and it's not gonna go sideways, so...). For the most part, it works; it slows to a stop and then dies, so thank you for that . However, sometimes it just stops dead in its tracks and dies. I'm not completely sure why. :?

[tsukiyomaru0]

EDIT2: This one ALSO worked:

Code: [Select]

ATBU A 1 A_ScaleVelocity(0.90)
ATBU A 0 A_JumpIf(momx*momx<1 && momy*momy<1 && momz*momz<1,"Death")

So I did this one (bcuz it looked like the same thing you put earlier except shorter) except I took out the momy and momz parts bcuz it should be allowed to be fired in the air (and it's not gonna go sideways, so...). For the most part, it works; it slows to a stop and then dies, so thank you for that . However, sometimes it just stops dead in its tracks and dies. I'm not completely sure why. :?

Change that "<1" to a higher value if you want it to die before it comes to a dead stop. But, well, close enough

[TheDoc]

Nononononono what I'm saying is that merely seconds after spawning, it will just stop and die.
Here's the code for reference:

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Spawn:
FLB2 A 5 //This just helps me with the timing
FLB2 A 1 A_ScaleVelocity(0.8)
FLB2 A 0 A_JumpIf(momx*momx<1,"NearDeath")
Goto Spawn+1
NearDeath:
FLB2 A 1 A_ChangeVelocity(0,0,0,CVF_REPLACE)
FLB2 A 5
Death:
TNT1 A 0
TNT1 A 0 A_SpawnItemEx("OilPitIgnite",0,0,8)
stop
}
}I want it to slow to a stop, float in mid-air for a brief moment, then die, and it works perfectly 85% of the time, but sometimes it will spawn, go at full speed like normal, but then after a half-second go straight to NearDeath.

[tsukiyomaru0]

Nononononono what I'm saying is that merely seconds after spawning, it will just stop and die.
Here's the code for reference:

Code: [Select]

Spawn:
FLB2 A 5 //This just helps me with the timing
FLB2 A 1 A_ScaleVelocity(0.8)
FLB2 A 0 A_JumpIf(momx*momx<1,"NearDeath")
Goto Spawn+1
NearDeath:
FLB2 A 1 A_ChangeVelocity(0,0,0,CVF_REPLACE)
FLB2 A 5
Death:
TNT1 A 0
TNT1 A 0 A_SpawnItemEx("OilPitIgnite",0,0,8)
stop
}
}I want it to slow to a stop, float in mid-air for a brief moment, then die, and it works perfectly 85% of the time, but sometimes it will spawn, go at full speed like normal, but then after a half-second go straight to NearDeath.

You forgot part of the code I showed you. The "momx*momx*momx<1 && momy*momy<1 && momz*momz<1", means it checks that X², Y² AND Z² speed are lower than 1. If you want it to ignore Z speed, just remove the "&& momz*momz<1" part

[TheDoc]

But why would you need momy? Oh wait,

momx — Actor's velocity along the absolute X axis

Ah, makes sense now.

Anyway, it works, so thank you again!

[BombHornet]

I have a few questions. How do I make the Z-Saber for the HUD? And how do I make it slash three times?

[Russel]

The answer to this is to learn DECORATE.
My apologies for the very ambiguous answer, but animation is one of the most basic yet complex things in DECORATE and it is very hard to explain properly.

I suggest you look at the weapon template.

Also, you would need to play the animation three times and fire a projectile three times.
Hope this helped...not sure how it would if you don't want to put in the time to learn...

[Senkle]

Is there a way to make it where an actor/player gets an item/attack/weapon depending on the type of terrain?

[Gummywormz]

If it's for when you are in water, just check for whatever the underwater flag is. If you want specific things like sand / grass, you can try an ACS script that's based on checkactorfloortexture. Though if it's animated like lava you may have to check for every individual subtexture rather than the one in animdefs / the animated one.

[Davregis]

How do I make a projectile give the class a flag on crash?

class as in the playerclass

[tsukiyomaru0]

How do I make a projectile give the class a flag on crash?

class as in the playerclass

Pain state in the class and damage type in the projectile.
Example: if DamageType of the projectile is "GravityBreaker", the playerclass will need a pain state defined "Pain.GravityBreaker", with an A_ChangeFlag action function in said pain state.

[Davregis]

How do I make a projectile give the class a flag on crash?

class as in the playerclass

Pain state in the class and damage type in the projectile.
Example: if DamageType of the projectile is "GravityBreaker", the playerclass will need a pain state defined "Pain.GravityBreaker", with an A_ChangeFlag action function in said pain state.

I referred to the calling playerclass, yet this was part of the solution that resulted. and didn't actually work
An exploding projectile with the painstate as you describe works perfectly. Thanks!

[tsukiyomaru0]

How do I make a projectile give the class a flag on crash?

class as in the playerclass

Pain state in the class and damage type in the projectile.
Example: if DamageType of the projectile is "GravityBreaker", the playerclass will need a pain state defined "Pain.GravityBreaker", with an A_ChangeFlag action function in said pain state.

I referred to the calling playerclass, yet this was part of the solution that resulted.

An exploding projectile with the painstate as you describe works perfectly. Thanks!

Oh, so you meant give a flag to their master? You need CustomInventory instead. Make a CustomInventory that changes the flag on pickup and have the projectile use A_GiveToTarget said item.