Cut PolyLine Frame using Surface

Grasshopper
1

So i created frames of polyline that i wish to cut it with a surface. How can i do that in GH?

image

Cut.gh (18.8 KB)

2

Use split with brep

3

can u show me? I tried and it didnt work.

4

45
45.JPG1549×615 81.8 KB

5

I am hoping the polylines cut diagonally at the points position. So, i will have left diagonal segments and right separate

6

If you want like this you need to use Pufferfish Point surface side

cur
cur1560×582 73.1 KB

Cut2.gh (26.6 KB)