Garden Spline

Silly little parametric gridshell configurator. The shape starts from a coarse grid of control points, n by m spans with a spacing in x and y, of which every point can be moved, by default only up and down. That grid is smoothed with Catmull-Clark subdivision into a reference surface.

On top of it a planar pattern - triangular, quad, hex or octagonal - is drawn in the uv space of the surface and lifted onto it. Every edge of the pattern becomes a beam, either inline or stacked in a number of layers, the way the laths of a timber gridshell are. Though nothing is relaxed or checked structurally yet, the laths simply follow the surface.

Entire state stored in the url, packed with densing! The PDF export has a top, front and left view, the number of beams, the overall size and a QR code back to the configuration.