Help Collision works buggy

[boulder]

Himm I tried everything on that side before and today as well.
I couldn't find a stable way to get if two different ropes are touching each other. I got a lot of same rope touching itself but not stably each other. I started to sort all simplices in scene and comparing distances but it needs huge processing power.
Could you please give me a simple pseudo code to get if ropes touching each other and which. So that I will know what to fiddle with?

Thanks