geom:nscale

(geom:nscale solid factor)

The destructive geom:scale: multiplies the solid's own model coordinates by factor in place, drops the cached mesh, wireframe and geom:user-data, and answers the same solid. The one vertex mutation the package offers, and therefore the only place that has to invalidate. factor takes the same shapes as geom:scale -- a number, or a 3-vector or list for a non-uniform scale, with a mirroring factor flipping the facets and a zero component refused. See the solid modeling guide.