(Courtesy of André Cotan.)Įach of the pictorial methods differs in the way points on the object are located on the 2D viewing plane (the piece of paper).Ī perspective sketch presents the most realistic looking view. Figure 3.31 shows pictorial sketches for backpack concepts.ģ.31 Pictorial sketching is used frequently to convey preliminary design ideas, as in these backpack concept sketches. Figure 3.30 shows perspective, isometric, and oblique sketches of a stapler. This chapter examines three common methods used to sketch pictorials: isometric sketching, which is a subtype of the general category of axonometric projection, oblique sketching, and perspective sketching. Later in the design process, pictorial drawings are often used to show how parts fit together in an assembly and, in part catalogs and manuals, to make it easy to identify the objects. Their similarity to how the object is viewed in the real world makes them useful for communicating engineering designs to nonengineers. Pictorial sketches are used frequently during the ideation phase of engineering design to record ideas quickly and communicate them to others. Modern Graphics Communication, 5th EditionĪ pictorial sketch represents a 3D object on a 2D sheet of paper by orienting the object so you can see its width, height, and depth in a single view. 3.25 Choice of Position in Oblique Drawings.3.18 Orienting Ellipses in Isometric Drawings.3.3 Sketching Circles, Arcs, and Ellipses.
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