1. Chapter 3 Orthographic Projection

2. TOPICS Object representation Glass box concept Line convention Orthographic projection of point, line, plane, surface and object. Multiview projection

3. OBJECT REPRESENTATION Axonometric projection Multiview projection

4. MULTIVIEW PROJECTION Three principle dimensions of an object … Width Depth Height Width Height Depth … can be presented only two in each view. Adjacent view(s) is needed to fulfill the size description.

5. 1. Revolve the object with respect to observer. TO OBTAIN MULTIVIEW REPRESENTATION OF AN OBJECT 2. The observer move around the object.

6. REVOLVE THE OBJECT Front view Right side view Top view

7. OBSERVER MOVE AROUND Front view Right side view Top view

8. THE GLASS BOX CONCEPT Bottom view Left side view Rear view

9. Height Width Depth History

10. MULTIVIEW PROJECTION Click on the picture to play video

11. MULTIVIEW PROJECTION Click on the picture to play video

12. MULTIVIEW PROJECTION Click on the picture to play video

13. MULTIVIEW PROJECTION Click on the picture to play video