ZScript Discussion

[Major Cooke]

How can I check if an actor is standing on floor or on another actor? I did not dig deep into the sources, but I see there are P_CheckOnmobj function and MF2_ONMOBJ flag, but can't find such things in zscript files.

Because they weren't exported. You can do a check for bONMOBJ though. A_CheckFloor, but know this, actors one is standing upon are also counted as the 'floor' sometime, I think. Easiest way to tell is if they have no Z velocity.

Also, I want to make projectiles transform into non-projectiles if they hit anything they cannot damage (floors, walls, solid decorations, actors of same species as the shooter). Is there a function I can override and do the checks?

No. But there is the HIT<TARGET/MASTER/TRACER> flags. I suggest just using HITTRACER though because 'target' keeps track of the owner (explosion damage comes to mind.)

Code: Select all

TNT1 A 0
{
    if (tracer)
    {
    }
    else
    {
        //Didn't hit anything.
    }
}

[ZZYZX]

Easiest way to tell is if they have no Z velocity.

Elevator. Slope.

[Major Cooke]

A_CheckFloor, but know this, actors one is standing upon are also counted as the 'floor' sometime, I think. Easiest way to tell is if they have no Z velocity.

[Cherepoc]

You can do a check for bONMOBJ though.

Can't find it, seems like it was not exported either. The z velocity check is how I was always making the check for actor standing on something, but it's complex and unreliable, thought zscript gives better options.
Thanks for the hittracer suggestion, will try it. Although. I think, virtual function will be a better option.
EDIT: Interestingly enough there's ExplodeMissile(line lin = null, Actor target = null) function, which seems to be exactly what I want, but it's not virtual.

[Graf Zahl]

Easiest way to tell is if they have no Z velocity.

Elevator. Slope.

Both apply no velocity to an actor.

[Graf Zahl]

You can do a check for bONMOBJ though.

Can't find it, seems like it was not exported either.

Have you tried? This flag is not exported to DECORATE because it has no use there, but it needs to exist as a scripted variable to check these things.

[Cherepoc]

Have you tried? This flag is not exported to DECORATE because it has no use there, but it needs to exist as a scripted variable to check these things.

I searched that in zscript txt files, but only now realized that flags are not declared there, sorry for trouble.

[ZZYZX]

Easiest way to tell is if they have no Z velocity.

Elevator. Slope.

Both apply no velocity to an actor.

Elevator moves vertically. This means the actor will have nonzero velz.
Player running on a slope results in nonzero velz as well.

[Gez]

Velocity and movement are two different things in Doom. A player has vertical velocity when they jump, fall, or are blown away by an arch-vile's explosion. Riding an elevator or climbing up a slope doesn't give you vertical velocity, it just moves you upward.

[Ed the Bat]

I am able to check how much of an item is in a pickup (to see if it's not full, thanks to being tossed by a monster, for example) thusly:

Code: Select all

inventory me=inventory(self);
amt=me.Amount;

But is there a way to check what the item's default full amount would be? For example, if we're looking at Clip, and it was dropped by a vanilla ZombieMan, Amount is 5, and the other value I want to find is 10. Can this be retrieved, or do I have to manually put in 10 for this?

[cambertian]

Did ZScript finally clear up the whole "Players can't have animations for both melee and ranged attacks" thing that bugged me so much back in the days of DECORATE? Like how Quake's Ranger switches to an axe in both first AND third person?

[Graf Zahl]

But is there a way to check what the item's default full amount would be? For example, if we're looking at Clip, and it was dropped by a vanilla ZombieMan, Amount is 5, and the other value I want to find is 10. Can this be retrieved, or do I have to manually put in 10 for this?

Those other properties only exist for Ammo so you will find them in the Ammo class, not Inventory.

[Ed the Bat]

The only properties I see in Ammo are BackpackAmount and BackpackMaxAmount. But I figured out what I needed.
What I wanted was something like:

Code: Select all

BaseAmt=GetDefaultByType("Clip").Amount

Problem was that I was pulling from an array of strings, so GetDefaultByType was casting them as Actor, when I needed to first cast them as Inventory.

[Kinsie]

Easiest way to tell is if they have no Z velocity.

In my past experiences with Reelism, actors can hit the point of having 0 Z velocity in mid-air for a frame or so when at the peak of their arc of upward momentum (ie. when thrusted into the air).

[Arctangent]

Did ZScript finally clear up the whole "Players can't have animations for both melee and ranged attacks" thing that bugged me so much back in the days of DECORATE? Like how Quake's Ranger switches to an axe in both first AND third person?

I mean, there were ways to do that in Decorate.

Mind, I'm talking about attacks. As far as changing the entire sprite set based on the used weapon, that was kinda finicky in Decorate iirc and I'm not sure if ZScript's done anything about it.