Multiview Drawing A multiview drawing is one that shows two or more two-dimensional views of a threedimensional object. Multiview drawings provide the shape description of an object. When combined with dimensions, multiview drawings serve as the main form of communication between designers and manufacturers.
Width, Depth, and Height All three-dimensional objects have width, height, and depth. Width is associated with an object’s sideto-side dimension. Height is the measure of an object from top-to-bottom. Depth is associated with front-to-back distance.
Orthographic Projection Orthographic projection is a technique that is used to create multiview drawings. Orthographic projection is any projection of the features of an object onto an imaginary plane of projection. The projection of the features of the object is made by lines of sight that are perpendicular to the plane of projection.
Projection Plane A projection plane, also referred to as a plane of projection or picture plane, is an imaginary surface that exists between the viewer and the object. The projection plane is the surface onto which a two-dimensional view of a threedimensional object is projected and created.
Orthographic Projection Start by focusing only on the front projection plane. A person standing in front of the object would see only the five corners identified in black. 2 3 1 ht g i f s ngle o e lin 90° a ction at proje to ne pla 4 5
Sketching a Multiview Drawing Given the overall dimensions of the object, a pencil, and a sheet of graph paper, a sketching multiview drawing can be easily done using points, construction lines, and object lines.
Sketching a Multiview Drawing Step #1: Calculate the amount of space that the views will take up. Step #2: Layout the boxes within which the individual views will occur using points and construction lines.
Sketching a Multiview Drawing Step #1: Calculate the amount of space that the views will take up. Step #2: Layout the boxes within which the individual views will occur using points and construction lines. Step #3: Identify the visible edges by drawing object lines on top of the construction lines.