Cannot place spline point on actor

[Jbl86]

Hello,

I’m trying to learn how to use splines and this is very weird to me. I have this missile actor that detects a target via line trace. And I want to make a spline that goes from the missile to the target. But for some reason the last spline point is completely offset.

Here’s how I place the two spline points:

And here is the result (the debug boxes show the missile and the target’s location):

My expectation would be that the spline goes from one actor to the other.

I’ve tried changing the coordinate space to Local, I’ve removed all the tangent calculations, nothing has changed. I have also tried to calculate the last point’s location by subtracting the target location from the missile’s location (and vice versa), that didn’t change either.

I really don’t understand why that doesn’t work since it seems to me that my setup is pretty standard, is there something I don’t know about spline points that would prevent me from doing this?

I should specify that the target actor is static.

Thank you

[Everynone]

@Jbl86

is there something I don’t know about spline points that would prevent me from doing this

A spline component starts off with 2 spline points already - 0 & 1. If you add 2 more, as in your pic, there will be 4 in total. Could this be the issue?

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In case you do Clear spline points before adding new ones, double check this part:

How do you reference the target, is it valid? If it’s not, the point will still be added but at 0,0,0.

[Jbl86]

I do clear the spline points before adding new ones.

I checked the validity of the Target Actor and it is valid. I also tried with using its capsule collision as target instead of the entire actor and go the same result.

I get the target actor from a ray trace and store the hit actor in that variable.

Just to add more precisions, the spline mesh shown on my screenshot is accurate. When I ask the missile to move along the spline, its path matches the spline mesh exactly.

[Everynone]

Debug it. Draw some debug spheres, see where you’re actually placing it. Count points manually. Run this on Begin Play:

You’ll be able to see the spline run-time.

[Jbl86]

That node doesn’t seem to work, but detaching from the player controller and selecting the missile, this is what it looks like:

I can also confirm that the spline only has 2 points.

I’ve tried storing the raytrace’s hit location and using that instead of the actor/component’s location, and the result is the same, only… the offset is on the other side.

Correction: the ShowSplines node seems to work, it’s just that the spline is hidden by the spline mesh

[Jbl86]

Looks like this has actually nothing to do with feeding a raytraced location into the spline. I have the offset even when using the code that doesn’t raytrace. I’ll investigate this more carefully.

[Jbl86]

Nevermind, there was some old code that I forgot about, that also grabbed a target on its own and changed the actor’s rotation.

Thank you (again) @Everynone for the help and sorry for the waste of time.