Traité de perspective théorique et pratique
Traité de perspective théorique et pratique is an 18th-century French treatise on perspective and shadow theory by Deidier, published in 1744 by Charles-Antoine Jombert, aimed at students of geometric drawing and draughtsmen. Its pages are dense engraved plates of lettered construction diagrams, showing orthogonal and perspective projections of boxes, steps and wedge-shaped solids with dotted sight lines converging on a vanishing point and light-ray shadow lines, which a designer could use as a rigorous reference for spatial layout, technical line work and isometric-style construction.
