S = resize (S, SZ) scales the shape evenly so that its bounding box is as large as it can be within the sizes SZ = [x, y, z] in millimetres; a size of 0 leaves that direction free. resize (S, [30, 0, 0]) makes the shape 30 long in x and keeps its proportions. The corner of the box at the least x, y and z stays where it is, and every face keeps its type: a cylinder stays a cylinder.

With 'Uniform' set to false each direction given is scaled to its size on its own and a direction left at 0 keeps its size, as OpenSCAD’s resize does. Flat faces stay planes, but a curved face stretched so is no longer a cylinder, a cone or a sphere: Open CASCADE carries it as the exact B-spline surface it becomes, so solid.Shape.faces finds a stretched cylinder among the faces of type 'bspline', not 'cylinder'.

 ## A sphere of diameter 10 stretched into an ellipsoid 40 by 20 by 10
 E = resize (solid.sphere (5), [40, 20, 0], 'Uniform', false);

See also: solid.Shape.scale, solid.ellipsoid, geom.Region.resize

Source Code: solid.Shape