Flowlines Throughout A Field Around Boundary Areas

Greetings fellow Grasshopper users,

I am working on a uni project in which I am attempting to create a field of curves (on my project site) that displace around forms (buildings). A hand sketch of what I'm attempting is attached, as is my Grasshopper definition. The problem with it is twofold:

1. I want the curves to cease overlapping; ideally I would be able to input a minimum proximity for the whole field.

2. Get the curves to displace from other curves (building footprints), not their endpoints. I've tried inputting the curves but they don't work. Only the endpoints will give me something close to what I'm looking for. This will make it so that none of the curves flow inside of the buildings and I get an accurate flow diagram.

The end goal of this is to create a diagram similar to a wind analysis.

Rhino and Grasshopper are attached as well.

Thanks in advance!

cb