I selected the Cappellini wood chair (1988) by Marc Newson to use for my parametric extensions.
Original Chair:
I began by drawing my end curves in Rhino and then by 2 rail sweeping the top and bottom curves to the side curves. I added 3 support curves in the seat, true to Newson’s design. I also drew 4 additional curves in the center of the seat to reference for when I extend the seat curvature in grasshopper.
Rhino Model:
Next, I defined my design drivers and proceeded to grasshopper where I used sliders to manipulate the rib count and width, the length of the seat, and the curvature of seat.
Define Design Drivers:
I got all of the drivers to run to the best of my ability at this point. The main thing I am still trying to figure out is how to attach driver 1 (Rib count and width) to the drivers 2 and 3. This is probably something very simple….
Driver 1 Rib Count:
Driver 2: Rib Width
Driver 3: Seat Length
Driver 4: Seat Curvature
Parametrics 