How to have projectiles detect the linedef texture they hit?

DoomeDx · Post by **DoomeDx** » Thu Jan 16, 2020 9:13 pm

Hey all,

I have actors who function as tracers which triggers a special effect when it hits something. I was wondering if its possible for GZDoom to detect when it hits a certain texture. For example, when you shoot at a bunch of wood, woodchip particles spawn. If you hit a glass-like object, it will shoot shards of glass.

I know this is possible with ZScript but I am still a complete idiot with that (despite the fact that I am pretty well known with both Java and C++).

Could anyone point me into the right direction here? Can I make my hit puff's have different behavior depending on the texture it hits?

Matt · Post by **Matt** » Thu Jan 16, 2020 9:19 pm

Just be an idiot with ZS like the rest of us :V

To get a linedef near an actor I usually either:

1. kinda crude but does the collision work for you: call CheckMove in the direction of movement and then check the actor's BlockingLine pointer

or

2. use LineTrace (LineTracer also works but there's not much point if we're just getting a wall that a projectile has hit)

Then check out the mapdata structs to see what items are available to modify.

Tartlman · Post by **Tartlman** » Fri Jan 17, 2020 7:17 am

I'm fairly certain this is not possible without zscript, yes.

DoomeDx · Post by **DoomeDx** » Fri Jan 17, 2020 9:24 am

Tartlman wrote:I'm fairly certain this is not possible without zscript, yes.

Apologies, my post made it seem like I refused to use Zscript for it.

I'm open to use Zscript to get this done!

Apeirogon · Post by **Apeirogon** » Sat Jan 18, 2020 3:01 am

Matt wrote:call CheckMove in the direction of movement and then check the actor's BlockingLine pointer

But it didnt work like this, i.e. dont set blocking line pointer on actor.
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