Lines on dcc.Graph with arrows

[felipeboffnunes]

I created a network 3d graph using one of the examples from the documentation. There is no current way of creating an arrow on the line element from dcc.Graph. There is two workarounds, both either difficult or not as practical: Create annotations instead of lines (The annotations don't really maintain a good aspect on the graph, not really suitable for the problem). Create two extra lines for each line, representing the left and right parts of the arrow (completely difficult to do since you got to calculate for all lines two new lines).

If someone has a snippet which can create those two new lines from the original lines, I'm fine with it, but I really am not able to do it at the moment.

Arrows in the line element would be a really good feature, I have seen several forum questions about this.

This feature is really important for my work, and if I don't have it then I'll need to rework inside of dash with a new graph library, which would be awful since dcc.Graph does almost all the job perfectly.