Line inclined to both Planes
- The simplest position a straight line occupies in a space is, it is parallel to both V.P and H.P.
- The above position resulting in straight line as a top view and front view.
- For any other position first assume the given line parallel to both the planes.
- 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)
- Rotate this view to the given angle to get the final view.
- Project from it to get the other final view (foreshortened view).
- Then ratate this foreshortened view to the locus of other point(end), to get the final views.
- 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