A basic introductory class to Theory of Projection with a specific focus on Anna University first year students handling Engineering Graphics

1. THEORY
OF
PROJECTION

2. WHO HAS THE EYE?

3. SOMETHING MAJESTIC

4. SOMETHING MESMERISING

5. SOMETHING SURPRISING

6. SOMETHING SHOCKING

7. SOMETHING TRANQUILLING

8. SOMETHING TERRIFYING

9. SOMETHING ELSE

10. SOMETHING ELSE

11. SOMETHING ELSE

12. SOMETHING ELSE

13. SOMETHING ELSE

14. UNDERSTANDING OBJECT & IMAGE

15. UNDERSTANDING OBJECT & IMAGE

16. DIFFERENCE BTW OBJECT AND IMAGE
PARAMETER OBJECT IMAGE
INFORMATION MULTI SINGLE
VIEWPOINT CHANGED CANNOT CHANGE
CHANGE WITH
TIME
YES NO
DIMENSIONS 3D 2D
OWNERSHIP NO YES

17. SIZE DOES MATTER

18. DIFFERENTIATE

19. DIFFERENTIATE

20. DIFFERENTIATE

21. THE 2D – 3D PROBLEM
2D – Engineers
3D - Customers

22. THE 2D – 3D PROBLEM
2D – Engineers
3D - Customers

23. THE 2D – 3D PROBLEM
2D – Engineers
3D - Customers

24. THE 2D – 3D PROBLEM
2D – Engineers
3D - Customers

25. THE 2D – 3D PROBLEM
2D – Engineers
3D - Customers

26. EXPLAINING PROJECTION
OBJECT IMAGE
PROJECTION
OBSERVER

27. EXPLAINING PROJECTION
PROJECTION
IS THE PROCESS OF OBTAINING
_______ __________________________
FROM
_______ __________________________

28. Common Elements of a Projection System
• Center /Direction of Projection/
Station Point/Observers Eye
• Projection Plane/Picture Plane
• Object(s) to be projected
• Projectors/Visual Rays/Lines of Sight

29. Classification of Projection

30. TYPES OF PROJECTION
STATION POINT
OBJECT
PLANE OF PROJECTION
PROJECTORS
TYPE DISTANCE BTW SP & PP PROJECTORS
PERSPECTIVE FINITE RADIATING FROM STATION POINT
& INCLINED TO PROJECTION PLANE
PARALLEL INFINITE PARALLEL TO EACH OTHER &
PERPENDICULAR TO THE PLANE OF
PROJECTION

31. TYPES OF PROJECTION

32. TYPES OF PROJECTION

33. WHAT PROJECTION IS THIS?

34. ISOMETRIC & ORTHOGRAPHIC PROJECTION
ORTHOGRAPHIC ISOMETRIC
MULTI VIEW SINGLE VIEW
SHOWS THE OBJECT AS 3
DIFFERENT IMAGES AS VIEWED
FROM FRONT,TOP & BACK
SHOWS THE OBJECT AS ONE
IMAGE WITH ALL THREE SIDES
WITH ALL AXIS EQUALLY
INCLINED
CAN SHOW 2DIMENSIONS ONLY CAN SHOW 3DIMENSIONS ONLY

35. WHAT SHALL WE DO?
ISOMETRIC TO ORTHOGRAPHIC
ORTHOGRAPHIC TO ISOMETRIC

36. PRACTICE ISO TO ORTHO #1 FRONT VIEW
SIDE VIEW
TOP VIEW

37. PRACTICE ISO TO ORTHO #2

38. PRACTICE ISO TO ORTHO #3