algorithmic modeling for Rhino
Watch it from Here
In this Rhino Grasshopper stair tutorial we will use a simple loft surface to model a series of parametric stairs. First we will model the base curves in Rhino and use the loft command in Grasshopper to make the surface. Then we will use the "Contour" command to make the stairs curves and use an offset component combined with extrusion to finish the model.