Exposing Perception functions to Blueprints

Development Programming & Scripting Blueprint
1

Hi,

is it now possible to use


IAISightTargetInterface

,


CanBeSeenFrom

and


GetActorEyesViewPoint

in Blueprint ?
I found tutorials where the latter can easily be overwritten with C++, but in my case I can’t even add a C++ class inside my project. Everytime when I try to add a C++ class I can’t open my project anymore. Making the players head visible can also be done in BPs, but it would be probably a faster and more elegant way to just expose this function to BPs…

So it would be pretty cool if these functions were exposed to BP…(or are they and I am just completely blind…?)

2 

GetActorEyesViewPoint

Is already exposed on any Actor.


CanBeSeenFrom

is not exposed probably because it is called on update.

3

GetActorEyesViewpoint just returns the actor origin unless you override it in a c++ base class. There is a really great tutorial about this on YouTube. But no matter what you do, you really can’t get more than basic functionality from the perception system without some c++.

4

unfortunately (and as I mentioned it in the init post) I can’t add any c++ classes without breaking my project. I should have created a c++ project instead of a blueprint project back then. I would need to start all over again and create a c++ project…
That’s why I would highly appreciate if these basic functions would be exposed to BPs, to shift the AI’s perception and make him react to the player’s head easily and directly.

5

Nothing should prevent you from adding source code to a Blueprint Project and making it into a C++ Project. There is no need to start over.

6

Every time I add a C++ class and then try to reopen the project, I get the message “…could not be compiled. Try rebuilding from source manually…” . (I updated Visual Studio 2019 Community few days ago) Also can’t convert my BP project to C++ project…

Btw: Would I still get access to all the C++ functions even inside a BP project ?

7

You need to generate the solution files and open the solution in Visual Studio and have VS compile your project.

Yes.