Perspective, with the Reason of Shadows and Mirrors

A complex geometrical and architectural perspective diagram illustrates the principles of projection using three distinct views: Scenografie (perspective), Ortografie (elevation), and Icnografie (ground plan). On the right, a large rectangle labeled Icnografie represents the ground plan, with lines converging toward a poinct d'esloingnement (distance point) labeled O at the bottom right. In the center, a vertical axis labeled Ortografie shows lines of sight converging toward a central vertical line. On the left, a trapezoidal figure labeled Scenografie shows the perspective projection, with lines converging toward a poinct de haulture (height point, or vanishing point) labeled M at the bottom left. A horizontal line across the middle is labeled ligne taillee (cut line, or ground line). Various points are marked with letters (A, B, C, D, E, F, G, H) and numbers (1, 2, 3, 4, 5, 6). Vertical lines are labeled ligne de terre (ground line).

cut line

ground line

ground line

height point M

distance point O