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why we made drawings in 1st and 3rd angle projection not in
2nd and 4th angle?
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Answer Posted / yogendra j. rane (j.t.mahajan
Consider +Y as +VP
-Y as -VP
+X as +HP
-X as -HP
First up of all clear your concept of projection method.
In simple words:
We will unable to see projections from the horizontal plane
hence we need to rotate that plane to get projections
visible (which results as +VP or -VP plane).
I am talking abaout 1st angle methos. Let you are watching
object from your right side, then you will get F.V. in
front side of +VP plane so it will be visible to you.
But you will get T.V above HP plane and which is need to be
rotated by 90 deg.
Now consider if you rotate +HP plane to anticlockwise the
projection will go to back side of +VP plane and you will
not be able to see them, but if you rotate it clockwise it
will be in the front side of -VP plane which is in front of
viwer.
Try this basic logic/method to every quadrant/angle, you
will get ans to your question.
| Is This Answer Correct ? | 10 Yes | 2 No |
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