Spline Tools Quick Start

First introduced 25-Jan-2023.

NOTE in Unreal Engine 5.4 a possible engine change prevents the spline from updating after changes are made.
Walkaround: Click the tickbox "Input Spline Points to Construction Script" in the details panel to update the spline.

A new version will be available on FAB. This documentation will be updated soon.

Important:All the changes you make in the parent blueprint will travel to all child blueprints. Avoid making any changes to the parent blueprint!

The image shows the most simple blueprint setup. It creates metal fence meshes on the spline as you can see in the image below.

1. Construction script from parent blueprint
2. The Total Length spline node
3. Mesh On Spline definition node
4. Spline Placement A Auto placement node.

BP_MoSpline_Auto in Blueprints/V3/Basic does the same.

Video Playlist

1. Right click the blueprint BP_MeshesOnSpline_Parent in the Content Browser and create a Blueprint Child.
2. Give it a meaningful name and open it with a double click.
3. Open the Construction Script and start adding Spline Tool nodes. They need to be connected to the Parent: Construction Script.
4. You'll need Placement nodes, Segment nodes, and Mesh Definition nodes.

I recommend watching some basic tutorials if you haven't worked with Unreal Blueprints or another visual scripting system before. It's easy to understand and you do not need any programming knowledge.

Never make changes to the BP_MeshesOnSpline_Parent blueprint. Always work in a child blueprint.

Introduction to Blueprint Visual Scripting

• Placement placing the mesh along the spline
• Spline Segment divide the spline into segments
• Mesh On Spline define the static meshes

You'll also need a few other blueprint nodes like

• Variable to make changes easier in your blueprint
• Sequence to organize the flow of your nodes
• For Each Loop to divide segments and repeat spline placements

Click on the link below for a list of all nodes and what you can do with them.

Spline Segment Nodes Documentation