From an hexagonal prism and with a series of control points we have been changing the configuration of that series until a sequence of shapes have been modelled to be used in architecture and civil engineering. The process that provides the point nets allows us to generate some models where we can choose the desired length. expansion and torsion of the original prismatic shape. By using convenient modelling parameters we can emulate all these geometric operations. The examples shown in this presentation have been generated by using the Lagrange interpolation, and the algorithms have been written with Mathematica.