Isometric and Oblique Pictorials Introduction to Engineering Design Unit 2 – Technical Sketching and Drawing Language of Sketching Design and Modeling © 2011 Project Lead The Way, Inc. Project Lead The Way, Inc. Copyright 2012

Isometric and Oblique Pictorials Pictorial Drawing Isometric and Oblique Pictorials Introduction to Engineering Design Unit 2 – Technical Sketching and Drawing 2D illustration of a 3D object Shows three faces of an object in one view Provides a realistic view of an object Types of drawings Isometric Perspective Project Lead The Way, Inc. Copyright 2012 2

Isometric and Oblique Pictorials Introduction to Engineering Design Unit 2 – Technical Sketching and Drawing Isometric Pictorial Isometric means equal measure. Three adjacent faces on a cube will share a single point Edges converge at one point will appear as 120 degree angles or 30 degrees from the horizon line Project Lead The Way, Inc. Copyright 2012 3

Isometric and Oblique Pictorials Introduction to Engineering Design Unit 2 – Technical Sketching and Drawing Isometric Pictorial These three edges represent height, width, and depth depth width height Project Lead The Way, Inc. Copyright 2012 4

Isometric Sketch Example Isometric and Oblique Pictorials Introduction to Engineering Design Unit 2 – Technical Sketching and Drawing Isometric Sketch Example Project Lead The Way, Inc. Copyright 2012 5

Isometric Sketch Example Isometric and Oblique Pictorials Introduction to Engineering Design Unit 2 – Technical Sketching and Drawing Isometric Sketch Example Project Lead The Way, Inc. Copyright 2012 6

Isometric Sketch Historical Example Isometric and Oblique Pictorials Introduction to Engineering Design Unit 2 – Technical Sketching and Drawing Isometric Sketch Historical Example Earl Silas Tupper (1907 -1983) invented an air-tight Tupper Seal in 1947 Patent drawings of bowl and cover, 1957 (isometric pictorial) Courtesy Smithsonian Institute: http://sil.si.edu/exhibitions/doodles Project Lead The Way, Inc. Copyright 2012 7

Perspective Drawings A perspective drawing offers the most realistic three-dimensional view of all the pictorial methods, because it portrays the object in a manner that is most similar to how the human eye perceives the visual world.

Perspective Drawings Presentation Name Course Name Unit # – Lesson #.# – Lesson Name Perspective Drawings There are three different perspective representations (one-point, two-point, and three point). We will look at the 1-point and 2-point perspectives in this lesson. The number refers to the number of vanishing points used in the construction of the drawing, as you will learn.

One-Point Perspective The one-point perspective is relatively simple to make, but is somewhat awkward in appearance when compared to other types of pictorials. A horizontal line represents the horizon. One vanishing point is identified on the horizon line. A series of lines are drawn from distinctive points on the object to the vanishing point, outlining the object being constructed.

One-Point Perspective Example Presentation Name Course Name Unit # – Lesson #.# – Lesson Name One-Point Perspective Example Vanishing Point Horizon Line This is an example of a sketch of a tape dispenser in one-point perspective.

Two-Point Perspective The two-point perspective is the most common perspective drawing. A step-by-step procedure will be explained for the perspective.

Two-Point Perspective Example Horizon Line Vanishing Point 1 Vanishing Point 2

Multi-view (Orthographic) Drawing Multi-View Sketching Introduction to Engineering Design Unit 2 Technical Sketching and Drawing Multi-view (Orthographic) Drawing Shows two or more two-dimensional views of a three-dimensional object. Provides the shape description of an object. When combined with dimensions, serves as the main form of communication between designers and manufacturers. Project Lead The Way, Inc. Copyright 2007

Multi-view Drawing Isometric View Multi-View Sketching Introduction to Engineering Design Unit 2 Technical Sketching and Drawing Multi-view Drawing Isometric View Project Lead The Way, Inc. Copyright 2007

Example of Multi-view Sketch Multi-View Sketching Introduction to Engineering Design Unit 2 Technical Sketching and Drawing Example of Multi-view Sketch LEFT SIDE RIGHT SIDE FRONT Note that hidden lines are not shown for simplicity. Which view is represented by the image in the upper right labeled “Chair”? Dining Chair Project Lead The Way, Inc. Copyright 2007

Isometric and Oblique Pictorials Introduction to Engineering Design Unit 2 – Technical Sketching and Drawing References Tupper, Earl Silas. Patent drawings, 1957. Smithsonian Institute: http://sil.si.edu.exhibitions/doodles Project Lead The Way, Inc. Copyright 2012 17