How to make shooting enemy walls? [SOLVED] [No ACS]

[Joven0culto]

Well, this method may not work for everyone, but it does the job, and in a very simple way too.

Here I attach a small PK3 with the example, it is quite easy to understand, if someone is interested I can add a small breakdown of the process later on.
The secret, in a nutshell, is to create walls that encapsulate the enemy by making the sides and the back wall impassable and the front wall only blocks the player while the enemy is totally passable.

https://drive.google.com/file/d/1zHYtSn ... -gqIlbvW_/

Original post:

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Hi, I've been researching for a while how to create enemy walls that fire and I can't get them to work properly. At the moment, thanks to the flag WALLSPRITE I have achieved something very close but I have problems like the "recoil" of these “walls” when they are shot (they should remain static in place, otherwise what sense would it make that they are walls? ) even with the -PUSHABLE flag (I know that is not its real purpose but I could not find anything more suitable) and also the problem that produces its collision radius which creates a cubic collider with the wall inside centered when being a wall should be only a flat collider in the x/z axes (where z would be the vertical, I'm not sure how the axes are handled in this engine).

The code of my enemy wall is this (btw I use DECORATE):

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ACTOR Megaskull 11006 { //$Category 8Bit Killer/Enemigos Health 1000 Painchance 256 Speed 0 radius 32 height 64 mass 1000 monster +WALLSPRITE -PUSHABLE +NOBLOOD +DONTCORPSE +NOGRAVITY states { spawn: MGSK ABCB 4 A_LOOKEX (lof_nosoundcheck) LOOP see: MGSK D 8 A_SpawnProjectile("DISPARO1",32) MGSK ABCB 4 GOTO MISSILE missile: MGSK ABCB 4 MGSK D 8 A_SpawnProjectile("DISPARO1",32) MGSK ABCB 4 LOOP pain: MGSK E 8 A_PLAYSOUND("BALA/BLINDAJE",0,1.0,FALSE,ATTN_NONE,FALSE) GOTO MISSILE death: MGSK F -1 STOP } }

Does anyone have any suggestions?

[ramon.dexter]

You completely misunderstood how gzdoom and sprites and objects work. Flags like WALLSPRITE only tells renderer to not make sprite billboarded and dispaly it statically. It has completely nothing with sprite's hitbox. Sprite's hitbox is ALWAYS square, no matter what you do. My advice is to create instead some kind of smaller turrets and place these turrets alongside the wall. Because what you want to make is impossible in gzdoom, at least from what I know. Technically, you cannot make a hitbox flat on Y axis and make only X and Z axis work. Hitbox is always a cube.
And shootable walls in the meaning of wall could be better achieved with some smart ACS script.

[Joven0culto]

You completely misunderstood how gzdoom and sprites and objects work. Flags like WALLSPRITE only tells renderer to not make sprite billboarded and dispaly it statically. It has completely nothing with sprite's hitbox. Sprite's hitbox is ALWAYS square, no matter what you do. My advice is to create instead some kind of smaller turrets and place these turrets alongside the wall. Because what you want to make is impossible in gzdoom, at least from what I know. Technically, you cannot make a hitbox flat on Y axis and make only X and Z axis work. Hitbox is always a cube.
And shootable walls in the meaning of wall could be better achieved with some smart ACS script.

That's not the nicest way to say that YOU don´t know how to do it, exactly as me.
If someone else have something actually useful to say is more than welcome.

[phantombeta]

No, he's correct, even if he said it in a pretty rude way. Unfortunately, you can't make "flat" hitboxes like that in GZDoom. Actor hitboxes are always square in the X/Y (horizontal) axes, and are always aligned with the world's 3 axes. (i.e., hitboxes can't rotate to align with a wall)
The only way to do what you want properly is with ACS and destructible geometry instead of actors. Here's some links to info on destructible geometry: Link 1, link 2. You'll have to track the enemy's health manually, and if you want to have it react to pain like normal enemies you'll also have to do it yourself too.

[ramon.dexter]

You completely misunderstood how gzdoom and sprites and objects work. Flags like WALLSPRITE only tells renderer to not make sprite billboarded and dispaly it statically. It has completely nothing with sprite's hitbox. Sprite's hitbox is ALWAYS square, no matter what you do. My advice is to create instead some kind of smaller turrets and place these turrets alongside the wall. Because what you want to make is impossible in gzdoom, at least from what I know. Technically, you cannot make a hitbox flat on Y axis and make only X and Z axis work. Hitbox is always a cube.
And shootable walls in the meaning of wall could be better achieved with some smart ACS script.

That's not the nicest way to say that YOU don´t know how to do it, exactly as me.
If someone else have something actually useful to say is more than welcome.

I'm not the nicest guy around, since english is not my native. But when I speak about something, I'm pretty sure what I speak about.

[Joven0culto]

I'm not the nicest guy around, since english is not my native. But when I speak about something, I'm pretty sure what I speak about.

I can understand that, after all I am in the same situation regarding the language.

No, he's correct, even if he said it in a pretty rude way. Unfortunately, you can't make "flat" hitboxes like that in GZDoom. Actor hitboxes are always square in the X/Y (horizontal) axes, and are always aligned with the world's 3 axes. (i.e., hitboxes can't rotate to align with a wall)
The only way to do what you want properly is with ACS and destructible geometry instead of actors. Here's some links to info on destructible geometry: Link 1, link 2. You'll have to track the enemy's health manually, and if you want to have it react to pain like normal enemies you'll also have to do it yourself too.

Actually I have already achieved this, without the need for ACS, with a combination of DECORATE and creative level design. The flat 2D hitbox was just an idea within the general framework of the design problem, I had already thought of other possible approaches, such as being able to change the position of the sprite within the hitbox margins (which now I think would have been an even more difficult method than the flat hitbox XD). The right approach is crucial.

With some small changes in the DECORATE of the enemy and a series of walls with different attributes the final result is almost perfect with respect to what I intended (the remaining 1% to achieve exactly the desired result depends only on time).

I am preparing a small sample PK3.