ABSTRACT
“Real” objects are three-dimensional, or 3D. So why should we consider 2D objects, such as the 2D lines in this chapter? Consider Figure 3.1. It shows North America’s most celebrated residential buildling: Falling-water, designed by Frank Lloyd Wright. Clearly the building, illustrated in Figure 3.2, is 3D; yet in order to describe it, we need 2D floor plans outlining the building’s structure. These floorplans consist almost entirely of 2D lines. Fallingwater. the floorplan of this building by Frank Lloyd Wright https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315275550/d5c06179-3b1b-40ef-b4b2-1cf703cc32a4/content/fig3_1_OB.tif"/> (Source: https://www.archinform.delprcjekle/974.htm.) Falllngwater: a picture of this building by Frank Lloyd Wright. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315275550/d5c06179-3b1b-40ef-b4b2-1cf703cc32a4/content/fig3_2_OB.jpg"/> (Source: https://www.archinform.de/projekte/974.htm.)
