Projection of Lines | Engineering Drawing | #2 | PCE | Prof. Sonali Parida
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- Опубликовано: 21 янв 2025
- An easy approach towards understanding projection of lines.
The projection of a line can be obtained by projecting its end points on planes of projections and then connecting the points of projections. The projected length and inclination of a line, can be different compared to its true length and inclination.
Case 1. Line parallel to a plane
Case 2. Line inclined to a plane
VP:The plane in front of observer is the vertical plane. (VP)or it is also called a Frontal plane.
Front View (FV):The projection on the VP is called the Front View (FV)or Vertical Projection or front elevation or Elevation.
HP:The plane which is Horizontal and perpendicular to VP is Horizontal Plane.
Top View (TV):The projection on the HP is called the Top View (TV)or Horizontal Projection or Plan.
Note:The planes HP and VP are called Principal Planes.
Reference Line:The line of intersection of HP and VP is called reference line, which is denoted by X-Y.
if you have any doubts related to the topic, please put your comments down in the comment section. We will surely get back to you.
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She is writing in mirror manner
Hats off to you Ma'am
Well she is writing normally. The video is then flipped while editing 😂😂
Mam,ive come across lots of videos in these 2days but none of them explained like the way you did!!! Thank you so much mam🙏
An excellent presentation, thank-you so much. To clarify for some viewers who are confused, I would like to look at this from a different starting perspective:
A line which is parallel to a projection plane shows itself as its TRUE LENGTH (TL) on that plane, therefore:
A line parallel to HP is seen in its TL on HP
A line parallel to VP is seen in its TL on VP
Therefore, given the TL of a line, ab, (lets say the front view,FV, but it could equally be the top view, TV) if we draw this TL on either projection plane, we know that it will be a parallel line on the principle plane that is perpendicular to it (I am only referring at the moment to the two principle planes that we are calling HP and VP)
Therefore, by "dropping" the end point of a line, in our case b, assuming the other end point, a, is fixed, to the locus of all points at a distance, a, from the reference line (RL), we are satisfying our condition that this parallel line is seen in TL on other perpendicular principle projection plane.
All we need to now do is to rotate this point to the locus of all the points that b could lie on and we have the Top View (TV) of the line. Similarly, this process is repeated for the other projection plane and the result will be the required Front view and Top view of the line.
Your presentation in this video is actually a very useful and thought provoking way of looking at the projection of line, thank-you. I particularly like the way that you introduce the concept of the locus of points to solve this problem.
She is explaining so good. She is so clear and perfect. But Can u bring us all the explanations for engineering drawing all the topics? It will help me a lot. I have exams in one month can you bring it for us? It will be lot helpful. Thanks for the videos anyway!!
Armyyyyy 💜💜💜💜
no one could explain this topic better than you . Thank you 🙏
just cleared all my doubts.It was a wonderful session.Thank you
wow my every doubt is cleared. goddess of mathematics
Very nice explanation . Thank you
Beautiful presentation mam,Thank you so much
Maam, how can there be an inclined image on the planes if the line(in your case that pen). if it is kept the way you demonstrate. if it was so, we would see 2 lines one of length l cos theta and the other of l sin theta
Ur explanation is very good 😊
Very good explained
Thank you mam
Thanks alot 🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻
The explanation was very smooth and precise.
Nice explantion but still
I have this doubt
Frm the sentence
"line inclined to hp inclination is projected on vp"
Fine
But the inclination is on horizontal plane vertically
Then it will b line on both the planes!?
**Like the way u confused in xplaning with the inclined position on hp**!??
thank up so much mam i am trying hard so understand before this video
Awesome😊 explanation
Excellent work
excellent demonstration
Mam plz do vedio on orthographic projection of planes also mam
Plane figures in space are not represented by
a. three points not on straight line
b. three points on straight line
c. a point and a line
d. two parallel line
Super ma’am
The lecture was so good!
Really very nice explainTion ma'am 🙏👍
Very nice
Thanks
Good explanation 😃
please make the videos of projection of points .your other 8 videos on projection of lines are too good. thanks
Love you maam, bless you..so clear teaching..hats off maam
superb explanation.
Its really useful ❤️tqsm mam
Tqsm mam
awesome 💯💯
Projection of solids
Thank you mam
Very helpful.
Thanks a lot
At around 16:45 u said if we observ object from top we get plane of that object but at 17:00 u were taking fv as plan,why?
U r awesooooome Mam
Thank you
Tnk u ma'am it was so helpful.
part3 ?.
Tq mam
Comfused totaly
You teaching only in English. Great
I WISH PLS DO VIDEOS ON PROJECTION OF SOLIDS PLSSSSSSSS
Thank you mam
Thanks ma'am