Le due regole della prospettiua prattica
Le due regole della prospettiua prattica is a 1682 Bologna treatise on practical perspective, compiled from Vignola's and Ignazio Danti's rules by the printer Giuseppe Longhi and aimed at draughtsmen and architects learning to construct space. Its pictures are plain line diagrams of geometric figures, with labelled points, converging rays, and horizon lines drawn in black on a pale ground, showing how to project shapes onto a picture plane, useful to a designer for their clear construction logic and minimal linework.
