How to draw thousands of lines?

[Newbie]

For a network visualization algorithm, I need to draw thousands of lines in 3D space, each in different color and width. Currently I'm using gl.GLLinePlotItem create these lines and add them within a for-loop. As expected, it's extremely slow. Any suggestions to improve the performances?
(I checked another topic on the similar problem, but unable to adapt that solution to my problem.)

Also, I need to draw curved lines in 3D space? Do I have to use small segments of straight lines that are created using gl.GLLinePlotItem? Is there any other technique?

[David Palmer]

Can you draw one continuous line with many points, and a different pen for each segment?  So instead of having n pairs of points you have 2n points, and have the pen be alternatingly the color/width you want (between endpoints of a segment) and None (going to the next segment).

I know that pg.PlotDataItem() takes a connect= argument.  If you can get by with a smaller number of line widths and colors (because 2.3 pixels wide in color #f37492 is visually indistinguishable from 2.1 pixels wide #f76f93) you can group the line segments into a few dozen classes and draw each group separately.

[Preston Hinkle]

I had a similar question earlier and posted this thread:

https://groups.google.com/forum/#!searchin/pyqtgraph/preston$20hinkle%7Csort:relevance/pyqtgraph/V2FCUDrGJ9U/RCpXSZ5tEAAJ

I haven't implemented it yet, but it may work for you.

[Edmon Silva]

Thanks for your reply, but I couldn't get it running.