How to Add Spline point between to other points in a spline?

Development World Creation
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1

When I try to add point at index, it only accepts an integer?? I want to add several points to an existing spline inbetween other existing points. Is this possible?

2

Think of the spline points as if it was an array. The Add Spline Point at Index node will actually insert them:

309517-before.jpg

Above: before; below: after:

309518-after.jpg

309519-graph.jpg
309519-graph.jpg1147Ă—356 76.2 KB

In the above example, original points [2,3,4] became [5,6,7] making space for the new ones inserted by the loop.

3

@Everynone

Thanks, great explanation and images, I figured it was like an array, I should have looked up how UE handles adding indexes to an array. Although, I think I am going to have a headache trying to do what I want…

I am trying to create a spine mesh using a spline, but say my original spline only has 3 points, I calculated the number of spline meshes I want along the 3 point spline by:

If (SplineLength / MeshLength) < (MeshLength*1.5) then SplineMeshCount = truncate(SplineLength / MeshLength)
else
SplineMeshCount = truncate(SplineLength / MeshLength) + 1

SplineMeshLength = (SplineLength / SplineMeshCount)

I then, want to add points at every position along the original 3 point spline according to SplineMeshLength (I copied the original spline to create a “working spline” to add the points to so I could keep original spline in tact) and then remove any original points if they do not happen to fall at a correct position.

The problem I run into now, is that every time I add a point, the index of the original points is going to change. And I cannot remove the points until the end of adding all the points in order to keep the original shape of the spline (I’m hoping this would work anyways)

I realize I could, and will probably have to, write some convoluted script to track my original points ad increase each points index if they come after the point being added, Then add 1 to the index of each point being added for each original point passed? Is my thinking on track here?

Thanks again for your great answer.

This is all in Blueprints and C++ is not an option, this is a blueprint only project.