Tips for Projection of Straight Lines-II(Inclined to both planes)

Line inclined to both Planes

  1. The simplest position a straight line occupies in a space is, it is parallel to both V.P and H.P.
  2. The above position resulting in straight line as a top view and front view.
  3. For any other position first assume the given line parallel to both the planes.
  4. Then decide the view which will give us the true length of the line and true inclination. Draw locus line in both the points(ends)
  5. Rotate this view to the given angle to get the final view.
  6. Project from it to get the other final view (foreshortened view).
  7. Then ratate this foreshortened view to the locus of other point(end), to get the final views.

For example:

  • If a line is inclined to H.P, the front view will have the true length and true inclination.
  • Therefore rotate the front view to the given angle (θ -theta) and project this line to get foreshortened top view.
  • Rotate the foreshortened top view to the locus of other point, to get the final top view.
  • If a line is inclined to V.P, the top view will have the true length and true inclination.
  • Therefore rotate the top view to the given angle ( φ-phi) and project this line to get foreshortened front view.
  • then rotate the foreshortened front view to the locus of other point, to get the final front view.
Click the following link to download the power point show file for illustration of Projection of Lines
Power point on Projection of Lines – IIProjection of Lines – II

(Picture Coutesy:http://www.georgehart.com/cccg/Image71.jpg)

21 responses to “Tips for Projection of Straight Lines-II(Inclined to both planes)

  1. sir,pl revise projection of solids pl.by ece……

  2. I want more

    • sir … ‘m a stdn of JNTU anantpur…
      ‘m fac’n problm rgd’n projc’n of l9z inclined 2 both d plnz..
      plz gv me yr gmail id (or any other id so tht i cn gt hlp of u..!)
      i need 2 b in regular contact wid u..!
      cn’t expln u all ovr here…!
      plz snd me 1 mail on either of rajeev16godara@gmail /yahoo/rediffmail.com….
      thnq

  3. sir pls explain proj of line inclined to both planes using drawings

  4. sir ,
    i am rotating the two foreshorteend froent view and top view tolocus of the point i got two different length,which length is correct projected length?

  5. pls explain proj of line inclined to both planes using drawings

  6. aaniye pudunga vendam

  7. Thank u Sir for PROJECTION OF LINES Inclined to Both The Refrence planes

    Your tips are very useful.

    Yours Obediently

  8. sir how to draw ellipse

  9. nice site
    very useful

  10. Thank you Sir, It was really explanatory!

  11. sir … ‘m a stdn of JNTU anantpur…
    ‘m fac’n problm rgd’n projc’n of l9z inclined 2 both d plnz..
    plz gv me yr gmail id (or any other id so tht i cn gt hlp of u..!)
    i need 2 b in regular contact wid u..!
    cn’t expln u all ovr here…!
    plz snd me 1 mail on either of rajeev16godara@gmail /yahoo/rediffmail.com….
    thnq

  12. Nithin.a.varghese

    Please explain projectiön of lines inclined to both planes.

  13. it would be better learning for us if we have drawing…..

  14. I interest this programm becuse it improve my knowleg.think you

  15. sir pls explain projection of solids……….

  16. sir please give me information about projection of planes and also about the projection of lines inclined to both the planes

  17. how to draw the projection of line in first quadrant

  18. sir, thanks… ! its very useful tips .
    bt i have guidence abt engg graphics

  19. sir how to draw projection of lines when true length, inclined angles are given

  20. sir i want so many tips for projections of straight lines

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