How do you change a blueprint spline in-game?

Development Programming & Scripting Blueprint
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1

I am trying to show the navigation path between an actor and mouse position using a spline. I can get the array of points just fine but I can’t find a way to make the spline/spline mesh components update properly as the mouse moves. All the tutorials I find on splines only cover changing the spline in the editor.

33764-spline1.png
33764-spline1.png1390×332 178 KB

Here is the event graph for making the spline. Find path, set a new spline to the path, and the same basic loop that every tutorial has for putting mesh components on a spline. If I tell it to print out the number of points or the points in the path it works so I guess there is something wrong with how I am making the spline. What should the spline blueprint have for this to work?

2

Mostly resolved by exposing a variable for the array of points from the construction script and doing the spline work there.

I am not sure if there is a better way to do this besides destroying and recreating a new spline every tick though.

3

This method worked in a test file but when implemented in another passing the array causes a crash on compile and opening the blueprint.

4

Are you trying to do something like this?

I’m drawing out the spline with my mouse but it didn’t show in the video.

5

Oh, I’d really like to do exactly this… do you have a tutorial or can you post the blueprint? Thanks!