Perspective Drawings


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Perspective Drawings

  1. 1. Unit 2 Design & Measurement
  2. 2. <ul><li>General Learning Outcome: </li></ul><ul><li>Analyze objects, shapes, and processes to solve cost and design problems. </li></ul><ul><li>Specific Outcomes </li></ul><ul><li>2-1 Draw simple objects as oblique projections. </li></ul><ul><li>2-2 Sketch simple objects in “exploded” format. </li></ul><ul><li>2-3 Draw the constituent parts of a simple object to scale. </li></ul><ul><li>2-4 Describe the differences among oblique projections, “exploded” diagrams, and constituent parts diagrams for objects. </li></ul><ul><li>2-5 Solve problems involving estimation and costing for objects, shapes, or processes when a design is given. * </li></ul><ul><li>2-6 Plan the construction of an object within a specified budget. * </li></ul>Unit 2 – Design & Measurement
  3. 3. <ul><li>Oblique Projections </li></ul><ul><li>Paper is a two-dimensional medium. In order to represent a three-dimensional object on paper, the concept of perspective is used. </li></ul>Unit 2 – Design & Measurement
  4. 4. <ul><li>Perspective Representation </li></ul><ul><li>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. </li></ul><ul><li>When drawing using one point perspective all objects vanish to one common point somewhere on the horizon. </li></ul>Unit 2 – Design & Measurement
  5. 5. <ul><li>Perspective Representation </li></ul><ul><li>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. </li></ul>Unit 2 – Design & Measurement
  6. 6. <ul><li>Constructing a Box </li></ul><ul><li>Step 1 </li></ul><ul><li>Draw a horizon and place a vanishing point (VP) somewhere on this line. </li></ul>Unit 2 – Design & Measurement
  7. 7. <ul><li>Constructing a Box </li></ul><ul><li>Step 2 </li></ul><ul><li>Draw a square somewhere beneath the horizon. This will be the front of your box . </li></ul>Unit 2 – Design & Measurement
  8. 8. <ul><li>Constructing a Box </li></ul><ul><li>Step 3 </li></ul><ul><li>Draw four lines, one from each corner of the square which also pass through the vanishing point. </li></ul>Unit 2 – Design & Measurement
  9. 9. <ul><li>Constructing a Box </li></ul><ul><li>Step 4 </li></ul><ul><li>To complete the box, draw in the back vertical and an horizontal. </li></ul>Unit 2 – Design & Measurement
  10. 10. <ul><li>Constructing a Box </li></ul><ul><li>Step 5 </li></ul><ul><li>The final box in all its glory! </li></ul>Unit 2 – Design & Measurement
  11. 11. <ul><li>Perspective Representation </li></ul><ul><li>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. </li></ul><ul><li>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. </li></ul>Unit 2 – Design & Measurement
  12. 12. <ul><li>Perspective Representation </li></ul><ul><li>The illustration to the right demonstrates the how to draw a box in two point perspective. </li></ul><ul><li>Put two vanishing points at opposite ends of the horizontal line. </li></ul><ul><li>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. </li></ul><ul><li>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. </li></ul><ul><li>To complete both of the sides by drawing in the back verticals. </li></ul><ul><li>To draw the top of the box, draw lines from the back verticals to the opposite vanishing points. </li></ul>Unit 2 – Design & Measurement
  13. 13. <ul><li>Perspective Representation </li></ul><ul><li>The following is an example of the edge of a cube viewed straight on using a number of two-point perspective views. </li></ul>Unit 2 – Design & Measurement
  14. 14. <ul><li>Notebook Assignments </li></ul><ul><li>Page 77 – Q. 1 – 2 </li></ul><ul><li>Page 81 – Q. 1 - 3 </li></ul>Unit 2 – Design & Measurement