Resources
- Article on how to make a subclass of the spline component to have custom metadata for each spline point.
- You can also check the how the water plugin makes it owns subclass
https://github.com/EpicGames/UnrealEngine/blob/release/Engine/Plugins/Experimental/Water/Source/Editor/Private/WaterSplineMetadataDetails.cpp
Miscs
There isn’t any built in events that fires when the spline is updated.
You can use MarkRenderStateDirtyEvent located at the UActorComponent level, which is called when the spline is updated.