Extract line when it touches surface

[encephalon]

pls tag your topic with grasshopper. rhino itself has SelBox. so just bake out those lines/objects if you dont need it dynamically.

here is also a python script no idea if it works, but again not in grasshopper.

Select objects that intersect or are within another brep

ok i am familiar with the gh command but was curious if there were any in rhino. seems like after the split it should leave the option to select the split items on one side or the other. would be very convenient in complex models. thx!