Converting from Geometry to Splines in a Node Modifier

[Hexbob]

Hi there! I'm attempting to build a procedural Edge-to-Spline Node Modifier (with slightly different functionality than the inbuilt "Edge to Line" capsule) but I can't figure out how to return the generated spline object in the viewport when the node modifier is a child of a polygon object.

I'm wondering if (but hoping not!) it's a limitation of the Node Modifier system and whether it's in-fact not possible to change domains between mesh->spline objects within a modifier? Interestingly enough though, copying the nodes into the scene nodes context works perfectly. Is anyone able to confirm whether this is a limitation or if I'm simply missing something?

 

Thanks in advance!  

 

(Screenshots of the scene node setup working/node modifier setup not working below)

[Hrvoje]

Modifier only modifies existing geometry, it can't change it's type. Think of it as a deformer. You need to use spline mesh or object group.

[Hexbob]

Thanks for the quick response @Hrvoje! So it's just a misunderstanding as to how the system works on my part - makes sense, thanks!

I've gone back through and reapplied the nodes to an object group generator, and that seems to do the job well! Currently I've set it up to only grab the geometry from the first child of the generator, allowing me to add subsequent node modifiers below it (catenary spline, trim spline, etc). Hopefully this isn't too out out scope for this question but I was hoping instead to use an "Object Link" node rather than using child objects to grab the geometry, but I can't for the life of me figure out how to get the actual geometry (orange diamond shape) out of the object link node (blue circle shape), or what node is needed to convert them - any ideas?

[Hrvoje]

I see, that is still a bit cryptic. Add a new input on left input column, right click on the port and locate geometry port in object bundle under nested port category. This will give your geometry but you have to designate the parent port as linlk. Right clich and edit port, under advanced designate the scene port mode to link