How to edit a blocking volume in blueprint?

[PerCat]

Hey all I have levels that are randomly generated, I don’t know what size they will be before they generate, I need a blocking volume so the player can only leave at the designated exits, it’s all setup good and well.

Except, I can’t get a reference to the blocking volume within a blueprint. I can get a variable that is a blocking volume but I can’t seem to edit it’s collisions when I spawn one in?

I need to edit the one I created’s bounds and location on level creation but If I can’t get a reference I can’t. Basically just scaling it up by the levels size and setting it’s location to the levels origin.

I can create a new one by spawning it in when needed but I can’t make it hollow or set it’s collision responses.

So, how do I reference a blocking volume that is already created and in level through a blueprint? or How do I edit a new blocking volume’s collision responses and make it hollow?

Edit: I realize you can’t even edit any settings of a blocking volume in bp, what the hell? Are dynamic blocking volumes just not possible? My game is completely random gen so it’s literally impossible for me to set this up before play.

Thanks.

[PerCat]

@ClavosTech

Did you try leaving Scale alone (1,1,1 etc) and instead using the Set Extent node?

It doesn’t exist? Pulling off a blocking volume variable and there are no settings I can edit in the bp.

[PerCat]

@ClavosTech

True, doesn’t work… My bad!

Someone else will have to explain why it doesn’t work, but it appears the normal object hierarchy is different for BlockingVolumes / Trigger Boxes in Levels, versus the equivalent in Blueprints. It doesn’t come up often, as working in the Level Blueprint is less desirable (as code has to be copied manually to all levels).

Anyway, you could just add a Box Collision to a new Blueprint (Set the collision) and then drag or spawn that dynamically in the level. Then use the Set Extent node… To access all your blocking blueprints use Get all Actors of Class (Blocking Blueprint) or Get All Actors With Tag and set a default Tag unique string.

okay is there a way to make the box hollow though? Or would I have to do one for every level edge cause that makes this massively more difficult.

[PerCat]

@ClavosTech

By ‘hollow’, you mean no collision at all, or partial collision??? Either way, same advice as before…
Create a Blueprint with Box collision… Drop the BP into the level… Then you have total control etc…

No blocking volumes have the option of being hollow cubes and you can directly control it’s extent. That way you can just encase your level within a hollow cube you can’t leave instead of potentially needing 6 cubes.

[PerCat]

Alright, I know the rough size of the levels before gen so I could just do a hollow cube I guess, thanks.