block by veltman 1b43f61887e89c371f1c8c73341540a3

Canvas scatterplot with quadtree

Full Screen

Canvas scatterplot w/ quadtree for point picking on hover, per:

If you don’t want the full Voronoi effect because your chart has some big dead zones, you could add a distance threshold and only trigger the highlighting when the nearest point is within that distance.

If you need behavior that more closely mimics mouse/touch because your shapes have significant dimensions or their layer order matters, you could try colorpicking instead.