1. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Language of Sketching
Design and Modeling
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Copyright 2012

2. 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
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3. 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
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4. 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
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5. Isometric Sketch Example
Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Isometric Sketch Example
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6. Isometric Sketch Example
Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Isometric Sketch Example
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7. 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 ( ) invented an air-tight Tupper Seal in 1947
Patent drawings of bowl and cover, 1957 (isometric pictorial)
Courtesy Smithsonian Institute:
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8. 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.

9. 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.

10. 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.

11. 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.

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

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

14. 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.
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Copyright 2007

15. Multi-view Drawing Isometric View Multi-View Sketching
Introduction to Engineering Design
Unit 2 Technical Sketching and Drawing
Multi-view Drawing
Isometric View
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16. 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
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17. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
References
Tupper, Earl Silas. Patent drawings, Smithsonian Institute:
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