The "How do I..." Thread

[Ravick]

Can I make a line activate its special from both sides? Here it only works from the front side.

[ChronoSeth]

Can I make a line activate its special from both sides? Here it only works from the front side.

There's a flag for that accessible in DoomBuilder.

[Ravick]

Thanks;
Edit:

I've always mapped on thr format Skulltag in Hexen, where there was a menu option with a lot of dinamic lights. Now I'm learning to map in UDMF, and there is no this menu. How can I put DL in UDMF maps?

[HeXaGoN]

How do I make an object orbit another object?

[Ryan Cordell]

How do I make an object orbit another object?

Use A_Warp?

[Sergeant_Mark_IV]

Is there any way to make a missile disappear when hitting water without triggering it's death animation without making use of bounce flag?

[Xtyfe]

Is there any way to make a missile disappear when hitting water without triggering it's death animation without making use of bounce flag?

-EXPLODEONWATER wouldn't this do that?

[bgraybr]

Can I use A_JumpIfTargetInLOS to stop a monster from firing if other monsters are in front of it?

[FDARI]

---

Not in any feasible way.
The function does not check the line for obstructing actors, and you can't / shouldn't make specific tests for any and all actors that could get in the way. (It's a bad thing to do, and there's no good way to do it in the first place.)

[bgraybr]

Hmm. Is it even possible?

I have marines, and I want them to:
-avoid firing at players and other marines (I might just put THRUSPECIES on the projectiles that they fire)
-fire projectiles that don't hurt other marines or players. I've already accomplished the former by using DONTHURTSPECIES but the species property doesn't seem to affect players
-not enter their pain state when hit by another marine (already done using custom damage types, but the pain sound still plays)
-become hostile when fired upon by a player. (I've already tried using custom damage types/pain states with thing_hate, but it messes up the marine's AI completely for some reason).

[NeuralStunner]

Can I use A_JumpIfTargetInLOS to stop a monster from firing if other monsters are in front of it?

This feature suggestion might interest you.

[devildemon]

quick question is it possible for when one person picks up a powerup everyone gets at the same time?

[FDARI]

Try a custom inventory:

Code: Select all

actor RealPowerup : Powerup // not spawned in map
{
 /* .... powerup stuff .... */
}

actor PowerupPickup : CustomInventory
{
    States
    {
        Spawn:
            POWR A -1
            stop

        Pickup:
            TNT1 A 0 A_GiveInventory("RealPowerup", 1, AAPTR_PLAYER1)
            TNT1 A 0 A_GiveInventory("RealPowerup", 1, AAPTR_PLAYER2)
            TNT1 A 0 A_GiveInventory("RealPowerup", 1, AAPTR_PLAYER3)
            TNT1 A 0 A_GiveInventory("RealPowerup", 1, AAPTR_PLAYER4)
            TNT1 A 0 A_GiveInventory("RealPowerup", 1, AAPTR_PLAYER5)
            TNT1 A 0 A_GiveInventory("RealPowerup", 1, AAPTR_PLAYER6)
            TNT1 A 0 A_GiveInventory("RealPowerup", 1, AAPTR_PLAYER7)
            TNT1 A 0 A_GiveInventory("RealPowerup", 1, AAPTR_PLAYER8)
            stop
    }
}

I haven't tested this, but it ought to work. One potential problem: I'm not sure if this inventory state chain is guaranteed/able to return success. If it does not, the item might not be removed from the map, which means you get to pick it up over and over. There may be more than one workaround for this. There are known ways to ensure a successful pickup of a custom inventory item. (I've never needed to figure out.)

EDIT: The complete set of features used is first available in zdoom r3222.

[HeXaGoN]

How do I make an object orbit another object?

Use A_Warp?

Uh, I'm not so sure if that would work... is A_Warp used for that even?

[Ryan Cordell]

A_Warp can be used for it. FDARI's demo has such an example with the circling imp ball. You should try it out.