Spherical Perspective Tutorial 1: The Sliding Grid Method for Equirectangular Spherical Perspective
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- Опубліковано 22 сер 2024
- A neat "trick" I created for equirectangular perspective sketching:
-The usual fixed grid method allows you to draw horizontals and verticals going to the 4 cardinal points.
-The "sliding grid" method I show you here allows you to draw any line, given two points. I'll show you how to do it in this video. For why it works check out the paper where I introduced this method:
www.univ-ab.pt/...
note: this perspective is also sometimes called curvilinear perspective, 6-point perspective, or spherical perspective. In fact there are many spherical perspectives, and this is the "equirectangular spherical perspective", a specific type of spherical perspective. One of these days we will talks about the other types.
This is so insightful but I especially appreciate how you explain a high level reasoning behind the math involved here. Thank you so much for sharing!
Thank you so much for your kind comment.
This just blew my mind! I'm an engineer but we never learned hand drafting just CAD. I recently started to take some art classes including perspective drawing. I really want to try this now! Cheers! 🍻
Thank you Kate! Do let me know about the results. I always get a kick from knowing I am spreading the practice. About "just CAD": the urban sketchers group has a lot of architects that come there as refugees of "just CAD" or "just BIM", and engineers also feel this need. Computers are of course fine tools but schools forgot that handmade drawing is a mode of thinking, so you don't want to have the computer do it for you all the time, no matter how efficient it is, for the same reason you wouldn't want another person to think for you even if that person was smarter than you. We feel great when we draw because we are stretching a mental muscle we forgot we had. :)
@@antoniobandeiraaraujo yeh thats excellent im just getting introduced to the wonderful world of not having a comp around with me doing 3d, something i never thought of before much.
Learning about perspective is my favorite part about drawing right now this is so dope thank you man
Glad you enjoyed it! There's a bunch more to come, if only I can find the time!
Thank you so much for this video. Your explanation and instruction has helped me immensely.
My pleasure. :) There is much more coming soon.
Very helpful video..... Thank you very much for this..... been through many content to understand this perspective and everything went over my head. .... yours was the best.....
My pleasure, Doc. I'll be adding more as soon as my schedule allows. Meanwhile you can try my papers, but they are a bit heavy in maths. This video is a first attempt at spreading the kind of thing I've been doing in workshops since 2015 or so. The workshops can only reach so many people, of course; I think lots more will profit from the videos.
such a fantastic explanation. just perfect
Thank you!
I wish I had watched this video before the 360 sketch workshop this morning, lol...super helpful, thank you!
Glad you liked it. :) More coming soon.
I have been looking to learning this. THANK YOU
I had missed your comment. So glad you found what you were looking for. Check out the latest episode (tutorial 4) for a main trick of spherical perspective. It's the most important techique since the sliding grid.
@@antoniobandeiraaraujo -I will. Thank you
The Greatest explanation ever👌, can you make a perspective explanation series? It would be very amazing and helpful💪💪💪
Thank you! :) I have planned on making such a series since at least 2015, but I've been always too busy and frankly I feel I kind of suck at making videos, compared to live lecturing. It takes me a long time to make a video and I feel I still sound weird in the end. But the fact is that videos can reach so many people that can't come to my lectures, and messages like yours make me feel like trying it again. So I'll give it a shot as soon as I can. :) There's a lot I want to share that isn't written on my published papers.
@@antoniobandeiraaraujo a tip do not focus on editing the video at all, treat it like a regular lecture and it will be fine👌💪💪💪
@@maherco61 I considered that, but then it tends to get too long, without the engagement of looking people in the eye to keep them awake. Then again people seem to be patient enough to listen to podcasts that ramble for an hour or more (I certainly do). I might try that, it would certainly be a lot easier for me.
@@antoniobandeiraaraujo looking forward to see your vids man, best of luck💪💪💪
@@maherco61 Thanks! :)
Excellent!
Thank you, Nancy. :) By the way, the second part is already uploaded.
theres a little eye'in to do! i think i like it.
Euclid would be proud. This was glorious.
Just a pity that it could've been made in Portuguese as well. Just a suggestion, would you consider a dub?
"Euclid would be proud." That is a very perceptive comment, as it took me a while to realize that my work is in a sense a redux of Euclid. Not of his famous Elements, of course, but of his smaller and very misunderstood book, the Optics. And I do dare to hope that he would like it. :) So, thank you!
As for the dub, I thought of doing one, but first things first: I have a bunch of videos waiting to come out, and I have to gather wisely the little specks of free time that I manage to scrape from classes, family, and the endless academic bureaucracy...
MikeB
subscribing to learn more…
Thank you. :)
Thats similar to what I used to draw to make textures for toribash.
Equirectangular has many uses. :) And now I learned what toribash is, and I just have to try it! :)
@@antoniobandeiraaraujo totally deserves a chance. Super fun game and you can make cool custom skins using equirectangular perspective :D