Selected Bibliography Architectural Graphics | Page 203

BUILDING A DRAWING ·--- ~ We begin by drawing the perceived shape of a vertical plane that we face.This plane may be the wall of a room. the facade of a building, or an implied plane defined by two vertical elements, such as the corners of two buildings. ------·-+--·· We need to establish our eye level relative to the vertical __-- plane we have chosen. We focus on a specific point and draw - a horizontal. or horizon line. through that point. • Notice that horizontal elements situated above our eye level slope downward toward the horizon. whereas horizontal elements that are belowrise upward. • We can establish human figures in the foreground, middleground, and background to establish avertical scale. If the vanishing points for a set of horizontal lines lie off the sheet of the drawing. we can draw the front and rear vertica l edges of a receding face and judge what proportion of the vertica l leading edge lies above the horizon line and wh lies at below. We can then reproduce the sam proportions for the e rear vertical edge. • W use theestablished points toguide the drawing of the e inclined lines in perspective. These receding lines along with the horizon line then serve as visual guides for any other lines that converge at the same point. FREEHAND DRAWING / 197