okay, so i'm trying to get these 3d jumble of lines into igeo and have them react to gravity, which i figured out, and also attract to each other like shown in this tutorial:

http://igeo.jp/tutorial/51.html

the problem is that in this tutorial each line is divided and the parts of the line are what attract, whereas in my current version it is more like this tutorial:

http://igeo.jp/tutorial/48.html#0

where each line is actually a segment of a larger polyline. now, i want the end points of each segment of the polyline to become the nodes that attract to each other like how it does in the first tutorial. however, the issue is that the first tutorial uses IBoids and the second uses IVec/IParticles.

I'm pretty new to igeo so i'm really confused as to how to translate this. please help!!