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

2. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Oblique Pictorials
More realistic view because depth does not appear distorted
Object appears deeper than it actually is
A cavalier oblique [click] represents the object with full depth [click]. This tends to create the illusion that the object is deeper than it actually is. [click]
A cabinet oblique [click] represents the object with half depth [click]. The cabinet oblique, although actually drawn to half depth provides a more realistic view. [click]
Cavalier Oblique
Cabinet Oblique
Project Lead The Way, Inc.
Copyright 2012

3. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Oblique Pictorials
The following slides show the steps in creating oblique pictorials of the puzzle piece shown below.
Imagine a glass box that encloses the entire object.
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Copyright 2012 3

4. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Oblique Pictorials
Sketch a rectangle to represent the overall height and width of “the box” such that height lines are vertical and widths lines are horizontal. This will give a straight on view of the front of the object.
Overall Height
Overall Height
Overall Width
Overall Width
Project Lead The Way, Inc.
Copyright 2012

5. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Overall Depth
Complete “the box” by sketching depth lines to the overall depth of the object at a given angle (45 degrees here).
Cabinet is drawn half depth
Cavalier is drawn full depth
For the same object, the “front” (straight on) face is drawn the same for the cavalier and the cabinet oblique views.
For a cavalier oblique, the depth of the object is drawn to full scale.
For the cabinet oblique, the depth is drawn to a length of half of the actual depth measurement.
Full height
Full height
Full width
Full width
Cavalier Oblique
Cabinet Oblique
Project Lead The Way, Inc.
Copyright 2012

6. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Isometric Sketch
Project Lead The Way, Inc.
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7. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
The Box Method
Height- Vertical
Front View Width 30°
Side View Depth 30°
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8. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Step 1: Construct the Box
Layout the box that will contain the isometric view using points and construction lines
Stress the importance of light construction lines when constructing the box and connecting the points.
Height- Vertical
Front View Width 30°
Side View Depth 30°
Project Lead The Way, Inc.
Copyright 2012

9. Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Step 2: Outside Faces
Use points and construction lines to identify corners and edges of object faces that occur on box surface
Height- Vertical
Front View Width 30°
Side View Depth 30°
Project Lead The Way, Inc.
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10. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Step 2: Outside Faces (continued)
Trace visible edges of part with thick, dark object lines
Height- Vertical
Front View Width 30°
Side View Depth 30°
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11. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Isometric Sketch
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12. Step 1: Constructing The Box
Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Step 1: Constructing The Box
Determine the overall dimensions of the object:
3 units wide
2 units tall
2 units deep
Height- Vertical
Again light construction lines.
Front View Width 30°
Side View Depth 30°
Use points and construction lines to layout the box.
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Copyright 2012 12

13. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Step 2: Outside Faces
Use points and construction lines to identify corners and edges of object faces that occur on surface of the box
Height- Vertical
Front View Width 30°
Side View Depth 30°
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Copyright 2012 13

14. Step 2 – Outside Faces (continued)
Isometric Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
Step 2 – Outside Faces (continued)
Before sketch becomes too congested with construction lines, trace visible edges with object lines
Height- Vertical
Front View Width 30°
Side View Depth 30°
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Copyright 2012 14

15. Isometric and Oblique Pictorials
Introduction to Engineering Design
Unit 2 – Technical Sketching and Drawing
1-pt. Perspective Sketch
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Copyright 2012 15

16. METHOD 1 – The Box Method V.P.
1. Sketch a horizontal line across the upper portion of the paper to represent the horizon, and identify a vanishing point.
The vanishing point can be placed anywhere along the horizon line.

17. 2. Sketch the front face of a “box” representing the overall size of the object.
The front face is constructed with vertical height lines and horizontal width lines.
Overall Height- Vertical
Overall Width- Horizontal

18. ALL EXTERIOR AND INTERIOR HEIGHT AND WIDTH LINES ARE PARALELL
3. Sketch construction lines from the corners of the front face of the “box” back to the vanishing point.
Overall Height- Vertical
Depth to VP
Overall Width- Horizontal
ALL EXTERIOR AND INTERIOR HEIGHT AND WIDTH LINES ARE PARALELL

19. ALL EXTERIOR AND INTERIOR HEIGHT AND WIDTH LINES ARE PARALELL
Presentation Name
Course Name
Unit # – Lesson #.# – Lesson Name
ALL EXTERIOR AND INTERIOR HEIGHT AND WIDTH LINES ARE PARALELL
4. Sketch the visible back edges of the “box” to represent the overall size of the object.
Overall Height- Vertical
Estimate the depth of the object to create proportions that produce a realistic appearance.
Depth to VP
Overall Width- Horizontal
Note that you will have to estimate the depth of the object.

20. ALL EXTERIOR AND INTERIOR HEIGHT AND WIDTH LINES ARE PARALELL
5. Locate points and construction lines to identify corners and edges of the object on the surface of the “box”.
Overall Height- Vertical
Depth to VP
Overall Width- Horizontal
ALL EXTERIOR AND INTERIOR HEIGHT AND WIDTH LINES ARE PARALELL

21. ALL EXTERIOR AND INTERIOR HEIGHT AND WIDTH LINES ARE PARALELL
6. Use object lines to trace over the edges of the object on the visible surface of the “box”.
Overall Height- Vertical
Depth to VP
Overall Width- Horizontal
ALL EXTERIOR AND INTERIOR HEIGHT AND WIDTH LINES ARE PARALELL

22. Two-Point Perspective

23. Two-point Perspective
1. Sketch a horizontal line across the upper portion of the paper to represent the horizon, and identify two vanishing points.
The vanishing points should can be placed toward each end of the horizon line.

24. Two-point Perspective
2. Sketch a vertical construction line to represent the front edge of the object.
The construction line can be drawn below, above, or through the horizon line.
Front Edge

25. Two-point Perspective
An imaginary “box” encloses the entire object
3. Locate two points on the construction line to represent the top and bottom corners of the “box” within which the object will be sketched.
FRONT-SIDE EDGE

26. ALL EXTERIOR AND INTERIOR HEIGHT LINES ARE VERTICAL AND PARALELL
Two-point Perspective
ALL EXTERIOR AND INTERIOR HEIGHT LINES ARE VERTICAL AND PARALELL
4. Sketch a construction line from each point on the vertical line to each vanishing point.
Width to VP 1
Depth to VP 2

27. ALL EXTERIOR AND INTERIOR HEIGHT LINES ARE VERTICAL AND PARALELL
Two-point Perspective
ALL EXTERIOR AND INTERIOR HEIGHT LINES ARE VERTICAL AND PARALELL
Width to VP 1
5. Sketch points and vertical construction lines to represent the overall width and depth of the object.
You will need to estimate the location of these to make the box proportional.
Depth to VP 2

28. ALL EXTERIOR AND INTERIOR HEIGHT LINES ARE VERTICAL AND PARALELL
Two-point Perspective
ALL EXTERIOR AND INTERIOR HEIGHT LINES ARE VERTICAL AND PARALELL
Width to VP 1
Depth to VP 2
6. Sketch construction lines to represent the top back edges of the “box”.

29. ALL EXTERIOR AND INTERIOR HEIGHT LINES ARE VERTICAL AND PARALELL
Two-point Perspective
ALL EXTERIOR AND INTERIOR HEIGHT LINES ARE VERTICAL AND PARALELL
Width to VP 1
Depth to VP 2
7. Sketch points and construction lines to identify the edges of the object faces that occur on the visible surfaces of “the box.”

30. ALL EXTERIOR AND INTERIOR HEIGHT LINES ARE VERTICAL AND PARALELL
Two-point Perspective
ALL EXTERIOR AND INTERIOR HEIGHT LINES ARE VERTICAL AND PARALELL
Width to VP 1
Depth to VP 2
7. Sketch points and construction lines to identify the edges of the object faces that occur on the visible surfaces of “the box.”

31. ALL EXTERIOR AND INTERIOR HEIGHT LINES ARE VERTICAL AND PARALELL
Two-point Perspective
ALL EXTERIOR AND INTERIOR HEIGHT LINES ARE VERTICAL AND PARALELL
Width to VP 1
Depth to VP 2
7. Sketch points and construction lines to identify the edges of the object faces that occur on the visible surfaces of “the box.”

32. ALL EXTERIOR AND INTERIOR HEIGHT LINES ARE VERTICAL AND PARALELL
Two-point Perspective
ALL EXTERIOR AND INTERIOR HEIGHT LINES ARE VERTICAL AND PARALELL
Width to VP 1
Depth to VP 2
7. Sketch points and construction lines to identify the edges of the object faces that occur on the visible surfaces of “the box.”

33. ALL EXTERIOR AND INTERIOR HEIGHT LINES ARE VERTICAL AND PARALELL
Two-point Perspective
ALL EXTERIOR AND INTERIOR HEIGHT LINES ARE VERTICAL AND PARALELL
Width to VP 1
Depth to VP 2
8. Trace over the construction lines to delineate the edges of the object faces that occur on the visible surfaces of “the box.”

34. Multi-View, 3-View, Orthographic Projection.

35. Sketching a Multi-View Drawing
Multi-View Sketching
Introduction to Engineering Design
Unit 2 Technical Sketching and Drawing
Sketching a Multi-View Drawing
Step 1 - Layout the boxes within which the individual views will occur using points and construction lines.
TOP
FRONT
RIGHT SIDE
Project Lead The Way, Inc.
Copyright 2007

36. Box Dimensions front height + spacing + top depth= overall height
Multi-View Sketching
Introduction to Engineering Design
Unit 2 Technical Sketching and Drawing
Box Dimensions
FRONT
TOP
RIGHT SIDE
FRONT WIDTH
SPACE
SIDE DEPTH
FRONT HEIGHT
TOP DEPTH
front height + spacing + top depth=
overall height
front width + spacing + side depth=
overall width
Project Lead The Way, Inc.
Copyright 2007