Practical perspective; or, Perspective made easie. Teaching by the opticks, how to delineate all bodies, buildings, or landskips, &c. By the catoptricks, how to delineate confused appearances, so as when seen in a mirror or pollisht body of any intended shape, the reflection shall shew a designe. By the dioptircks [sic], how to draw parts of many figures into one, when seen through a glass or christal cut into many faces..
Practical perspective, a 1670 London treatise by Joseph Moxon, teaches drawing bodies, buildings and landscapes through optics, mirror reflections and anamorphic distortion for a practical audience of draughtsmen. The four plates show geometric construction: a radiating arch-and-column grid, a vaulted interior with converging lines, a row of cubic blocks receding to a central vanishing point, and a fan-shaped floor plan with a stepped structure. A designer could take from these the clean line systems of vanishing points and orthogonals as a model for architectural layouts and grids.
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