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

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

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. Project Lead The Way, Inc. Copyright 2012 3

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

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

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

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° Project Lead The Way, Inc. Copyright 2012 7

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

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. Copyright 2012 9

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° Project Lead The Way, Inc. Copyright 2012 10

Isometric and Oblique Pictorials Introduction to Engineering Design Unit 2 – Technical Sketching and Drawing Isometric Sketch Project Lead The Way, Inc. Copyright 2012 11

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. Project Lead The Way, Inc. Copyright 2012 12

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° Project Lead The Way, Inc. Copyright 2012 13

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° Project Lead The Way, Inc. Copyright 2012 14

Isometric and Oblique Pictorials Introduction to Engineering Design Unit 2 – Technical Sketching and Drawing 1-pt. Perspective Sketch Project Lead The Way, Inc. Copyright 2012 15

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.

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

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

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.

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

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

Two-Point Perspective

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.

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

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

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

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

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”.

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.”

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.”

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.”

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.”

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.”

Multi-View, 3-View, Orthographic Projection.

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

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