5.1.2. Orthographic Or Multi View Projection
Imagine that you have an object suspended by transparent
threads inside a glass box, as in figure 5.3.
Figure 5.3 Orthographic projection
Then draw the object on each of three faces as seen from that
direction. Unfold the box (figure 5.4) and you have the three
views. We call this an "orthographic" or "multi view" drawing.