Setting the doors position to the intersection point probably seems pretty confusing without context. Setting it to that position isn’t exactly the end goal of the issue, but finding that location is a step that’s (what I believe is) necessary to complete the sliding door.
I need to set a sliding door’s position at various points in the door frame. The prob is I can’t just use the frame’s origin and add x distance in a direction; there are two doors with slightly different offsets from frame so the frame’s origin won’t always work. I’m sure there’s a simpler method if I just want to hard code it in, but I’m not a huge fan of that method 
I’m gonna post the GetIntersectPoint function in the comment above and it may make more sense after that