Projection of lines

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Projection of lines

  1. 1. ASSIGNMENT (to be submitted on 22nd Oct 2010, Friday) 1. Page 2 – Problem 4 (pentagon) – TYPE 1a 2. Page 2 – Problem 5 (square) – TYPE 1a 3. Page 3 – Problem 7 (rectangle) – TYPE 2a (find angle of inclination with V.P.) 4. University questions – No. 7 (circle) – TYPE 1b2 (find angle of inclination with H.P.) 5. University questions – No. 9 (hexagon) – TYPE 2a
  2. 2. PROJECTION OF LINES Engineering Graphics I Year - CSE
  3. 3. Line parallel to HP and VP True length VP HP Distance above HP Distance in front of VP a’ b1’ b1 a True length
  4. 4. Locus of a’ Locus of a True length Top view length VP HP Distance above HP Distance in front of VP True inclination with HP a’ b1’ b1 a Line inclined to HP and parallel to VP
  5. 5. Locus of a’ Locus of a Truelength VP HP Distance above HP Distance in front of VP True inclination with HP a’ b1’ a Line perpendicular to HP , b1
  6. 6. Locus of a’ Locus of a VP HP Distance above HP Distance in front of VP a’ True length True inclination with VP b1 a Front view length b1’ Line inclined to VP and parallel to HP
  7. 7. TYPE - I Locus of one end point True length True inclinations with VP and HP Line inclined to both VP and HP
  8. 8. Apparent inclination with HP Locus of a’ Locus of b’ Locus of a Locus of b True length True length Front view length VP HP Distance above HP Apparent inclination with VP True inclination with VP True inclination with HP a’ b1’ b1 aDistance in front of VP Top view length Frontview length b2’ Topviewlength b2 Distance between end projectors
  9. 9. TYPE - II Locus of two end points True length Line inclined to both VP and HP
  10. 10. Apparent inclination with HP Locus of a’ Locus of b’ Locus of a Locus of b True length True length Front view length VP HP Apparent inclination with VP True inclination with VP a’ b1’ b1 a Top view length Frontview length b2’ Topviewlength b2 Distance between end projectors Distances above HP Distances in front of VP True inclination with HP
  11. 11. Apparent inclination with HP Locus of b’ Locus of a’ Locus of a Locus of b True length True length Front view length VP HP Apparent inclination with VP True inclination with VP a’ b1’ b1 a Top view length Frontview lengthTopviewlength b2 Distance between end projectors Distances above HP Distances in front of VP True inclination with HP b2’
  12. 12. TYPE - III True length Top and front view of ONE end point Top/front view of OTHER end point Length of Top/front view Line inclined to both VP and HP
  13. 13. Apparent inclination with HP Locus of a’ Locus of b’ Locus of b Locus of a True length True length Front view length VP HP Apparent inclination with VP True inclination with VP a’ b1’ b1 a Top view length Frontview length b2’ Topviewlength b2 Distance between end projectors Distance above HP Distances in front of VP True inclination with HP
  14. 14. TYPE - IV True length Top and front view of ONE end point Length of top AND front views Line inclined to both VP and HP
  15. 15. Apparent inclination with HP Locus of a’ Locus of b’ Locus of a Locus of b True length Front view length VP HP Distance above HP Apparent inclination with VP True inclination with VP True inclination with HP a’ b1’ b1 aDistance in front of VP Top view length Frontview length b2’ Topviewlength b2 Distance between end projectors True length
  16. 16. TYPE - V Distance between end projectors Line inclined to both VP and HP
  17. 17. Apparent inclination with HP Locus of a’ Locus of b’ Locus of a Locus of b True length Front view length VP HP Distances above HP Apparent inclination with VP True inclination with VP True inclination with HP a’ b1’ b1 aDistance in front of VP Top view length Frontview length b2’ Topviewlength b2 Distance between end projectors True length
  18. 18. TYPE - VI One end point in H.P. and the other in V.P. Line inclined to both VP and HP
  19. 19. Apparent inclination with HP Locus of b’ Locus of a True length True length Front view length VP HP Apparent inclination with VP True inclination with VP a1 Top view length Frontview length b2’ Topviewlength True inclination with HP a2 b1’ Locus of a’ Locus of b
  20. 20. Locus of a’ Locus of b’ Locus of b Locus of a VP HPa1’ Frontview length b2’ Topviewlength a2 b Distance between end projectors
  21. 21. TYPE - VII Mid-point problem Line inclined to both VP and HP
  22. 22. Apparent inclination with HP Locus of a’ Locus of b’ Locus of a Locus of b TL/2 Front view length VP HP Distance above HP Apparent inclination with VP True inclination with VP True inclination with HP a1’ b1’ b1 a1 Distance in front of VP Top view length Frontview length b2’ Topviewlength b2 Locus of m’ Locus of m TL/2 TL/2 TL/2 a2 m m’ a2’ Distance between end projectors
  23. 23. THE END

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