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# Perspective Drawings

## by Bruce Coulter on Oct 02, 2010

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## Perspective DrawingsPresentation Transcript

• Unit 2 Design & Measurement
• General Learning Outcome:
• Analyze objects, shapes, and processes to solve cost and design problems.
• Specific Outcomes
• 2-1 Draw simple objects as oblique projections.
• 2-2 Sketch simple objects in “exploded” format.
• 2-3 Draw the constituent parts of a simple object to scale.
• 2-4 Describe the differences among oblique projections, “exploded” diagrams, and constituent parts diagrams for objects.
• 2-5 Solve problems involving estimation and costing for objects, shapes, or processes when a design is given. *
• 2-6 Plan the construction of an object within a specified budget. *
Unit 2 – Design & Measurement
• Oblique Projections
• Paper is a two-dimensional medium. In order to represent a three-dimensional object on paper, the concept of perspective is used.
Unit 2 – Design & Measurement
• Perspective Representation
• Using one perspective , parallel lines converge to one point somewhere in the distance. This point is called the vanishing point (VP). This gives objects an impression of depth.
• When drawing using one point perspective all objects vanish to one common point somewhere on the horizon.
Unit 2 – Design & Measurement
• Perspective Representation
• The sides of an object diminish towards the vanishing point. All vertical and horizontal lines though are drawn with no perspective. i.e. face on.
Unit 2 – Design & Measurement
• Constructing a Box
• Step 1
• Draw a horizon and place a vanishing point (VP) somewhere on this line.
Unit 2 – Design & Measurement
• Constructing a Box
• Step 2
• Draw a square somewhere beneath the horizon. This will be the front of your box .
Unit 2 – Design & Measurement
• Constructing a Box
• Step 3
• Draw four lines, one from each corner of the square which also pass through the vanishing point.
Unit 2 – Design & Measurement
• Constructing a Box
• Step 4
• To complete the box, draw in the back vertical and an horizontal.
Unit 2 – Design & Measurement
• Constructing a Box
• Step 5
• The final box in all its glory!
Unit 2 – Design & Measurement
• Perspective Representation
• Two Point Perspective is a much more useful drawing system than the more simple One Point Perspective. Objects drawn in two point perspective have a more natural look.
• In two point perspective the sides of the object vanish to one of two vanishing points on the horizon. Vertical lines in the object have no perspective applied to them.
Unit 2 – Design & Measurement
• Perspective Representation
• The illustration to the right demonstrates the how to draw a box in two point perspective.
• Put two vanishing points at opposite ends of the horizontal line.
• Draw in the front vertical of the box. Drawing the line below the horizontal will create a view which we are looking down on. To look at the object from below, draw the front vertical above the horizontal.
• Draw lines from the top of the vertical which disappear back to both of the vanishing points. Repeat the process for the bottom of the line.
• To complete both of the sides by drawing in the back verticals.
• To draw the top of the box, draw lines from the back verticals to the opposite vanishing points.
Unit 2 – Design & Measurement
• Perspective Representation
• The following is an example of the edge of a cube viewed straight on using a number of two-point perspective views.
Unit 2 – Design & Measurement
• Notebook Assignments
• Page 77 – Q. 1 – 2
• Page 81 – Q. 1 - 3
Unit 2 – Design & Measurement