Add arrow option (for directed graphs)

[bwlewis]

a bit tricky...

[kgellatl]

Has there been any update on this??

[icejean]

There's a project supports arrow on edge here:
https://github.com/vasturiano/3d-force-graph
https://vasturiano.github.io/3d-force-graph/example/directional-links-arrows/
But it doesn't support Shiny, so it'll be great if rthreejs would add this feature.

[bwlewis]

That's a great reference, thanks! I was unaware of it. My quick take on this is that the cones used to represent arrows will only work well for small graphs (the rendering performance will be poor for graphs with many vertices). But I will experiment with that...

[icejean]

Well, I'm studying Neo4j these days, and get to know with Vasturiano's project recently. I'd rather research a big graph with Neo4j Browser and Cypher, then export the target graph with little vertices, within 100 for example, to a Shiny APP, then explore the little graph with 3D visualization, what I need are: Shiny support, 3D force graph, label of vertice and edge, arrow of edge. So I'm searching for a proper project this week, and find that threejs is lacking of arrow, and Vasturiano's project is lacking of Shiny support, and visNetwork is lacking of 3D.
It seems that Vasturiano's project is used by Neo4j: https://awesomeopensource.com/project/jexp/neo4j-3d-force-graph ,
I get the message from this link: https://awesomeopensource.com/projects/graph-visualization .
I don't think visualizing a big graph in browser is a good idea, we only need to handle a little target graph instead, I think this is the common scene.
So it'll be great that if your project will support edge arrow and label. Cheers!