i've been working on stadium design for my thesis and have just begun using grasshopper as a tool to easily adjust the leg room the seating rake angle and the number of seats per row.  I was wondering if you could give me some tips on how you created a boundary for the seating and how you oriented it toward a focal point on the field.

i uploaded what ive got so far but its very simple.  I dont know how to expand on what ive got into multiple rows which are a specified distance from the focal point.

thanks, matt