Use LineTraceByChannel on difernt Actors?

[Ncgi88]

Is it possible to use lineTraceByChannel on diferent actors?

i am doing an Archviz project an i want to slide doors only when i look at them inside a colision box, my problem is i only can do this with a single actor.

when i add diferent actors linebytrace stops working

Any solution??

[Everynone]

Is it possible to use lineTraceByChannel on diferent actors?

The answer is yes, it’s possible. It’s somewhat hard to understand what is not working for you. Care to share more details?

an i want to slide doors only when i look at them inside a colision box

How does this bit work? Each door has its own overlapping collision volume; while the player is inside of it and is looking at the door, the door opens?

Any reason why you cannot simply reduce the length of the trace?

[Ncgi88]

Thank you very much for helping me, i will share in detail my problem.

I created a sliding window actor that can only be activated when i am inside his colision box and at the same time i am looking at it.

The bluprint is this one:

My problem is when i create another actor i cant make it to work because i dont know how to cast linetraceByChannel to multiple actors.

Just need to know how to cast linetrace to diferent actors, i am using a frist person caracter.

Have a nice day

[Everynone]

My problem is when i create another actor i cant make it to work because i dont know how to cast linetraceByChannel to multiple actors.

You have options:

• use Inheritance:
  – implement functionality in the parent class, you will only need to cast to the parent class and all children will understand the function call.
• use an Interface - this way you do not need to cast at all:
  – send a generic message target actors can interpret. Especially useful when actors that do not share functionality - like a Tree and a Door - they have little in common. An interface would allow you to send the same message to both.

[Ncgi88]

ok so insted of casting to a specific actor if i use an interface all actors will understand even if they do diferent things like sliding door and a opening rotating one?

[Everynone]

Precisely. Each actor can decide for themselves what that generic message means to them.

• if you look at a tree, it will shake
• if you look at the door, it will open
• if you look at the bucket, you kick it

shake / open / kick functionality would be implemented in the actor itself.

---

• create the interface in the content browser:

• open it and add a function:

• in the Door / Window actor (any actor that needs it), add the Interface:

And then implement desired functionality.

• when you line trace:

[Ncgi88]

Thank you very much, i will study this subject further and test it.

You have been very helpful, thank you for sharing your knowledge.

Have i nice day