Perspective Drawing 16 - How To Rotate Objects In Perspective (Part 2)
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- čas přidán 2. 07. 2024
- In this episode of the perspective drawing series we take a look at some more methods for rotating objects in perspective which involve ellipses.
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Thank you so much for this man, been getting back into perspective recently and this is a godsend.
Glad you find it helpful :)
Very articulate and well explained especially using eliptic boxed method....this is a great tutorial video, well done !!!...thanks for sharing and very informative !!!!
ive been doing the rotating cubes at different heights exercise so wrong thanks for this video!
That was fantastic
Wow that's a very good resource. This is a great video^^
Very interesting tutorial again Dan. Thanks for sharing your skill.
Thanks Surin
You are a lifesaver, mate
Had to watch this a few times to get it thanks for this
I would love to see a video on how you are projecting the flat squares at the top and using their lines to create 3D rotating forms below. Thanks for the content really helpful in learning how to rotate cubes.
I'VE BEEN WATING :)
great drawing, good to know. Thanks
From 1:15 I don't get how to find the vanishing points, could someone explain it to me please ? :)
I've been studying Dan Beardshaw's perspective drawings and shapes. He's got it! I've always been interested in drawing shapes. I enjoy drawing faces and cartoonish-like figures. But I've always lacked perspective drawing talent. Dan Beardshaw is a savant when it comes to perspective drawings. Thank you for sharing your knowledge and talents with us.
dude, ur Awesome, thanks a lot
This is really helpful, thank you. If you don't mind, can you provide a scanned sheet for this in 3:21 ?
WOW! 😮🙏
And if you want to rotate a rectangle, you'd just use two boxes. And if you wanted to rotate a rectangle about its center, you could subdivide the perpendicular planes.
Are you using two different projection conventions at the same time? 1:15 I didn’t expect the apparent widths (of the rotated cubes) to be the same as the actual rotated widths in the usual linear perspective where we project onto our eye through the canvas.
Ótima explicação!👍🏽👍🏽👍🏽👍🏽👍🏽🇧🇷
brasileiros unidos tentando aprender perspectiva! haha 🇧🇷✍️
is there a way to use geometry to rotate an object at a specific angle? Because I've tried making up my own way to rotate, but it isn't accurate.
3:22 holy crap that bottom row really screws with my mind. 1, 4, and 5 I still cant see properly. 2 and 3 I couldnt see properly then my eyes adjusted and I did. Then I blinked it it couldnt see it properly again, some real funky stuff.
The part with the minor axis confused me a lot 😭 once the boxes were drawn they looked perpendicular to the "original" plane but before that they looked like random lines to me... how do you place these lines accurately? Is there a way to check if I placed them correctly? You can’t possibly eyeball it, right??? 😳
I'm 99% certain this part (5:28 onward) is simply incorrect. Without defining a station point, there's simply no way to tell if these quadrilaterals are actually squares in 3d, or simply rectangles, or if they actually share a common 3d perspective- if they're rectangles, then an ellipse drawn within one isn't a circle in 3d, it's still an ellipse. And then you can't do a rotation using it without distorting the proportions. Also, have no idea where he got the idea that the minor axis of an ellipse representing a 3d circle will always align a line drawn perpendicular to the plane of the circle it represents- that's not true, although it may often look close enough to work as an approximation.
@@caddywampa6602 do i have to purchase courses to learn perspective completely?
I dont own any credit cards or have any bank accounts.
@@floyd222 Are you joking? You can search youtube and google as well as I can, I assume. You've got the entirety of human knowledge at your fingertips, you've just got to look for it. Of course, paid courses (or books or video series) are generally the FASTEST way to acquire knowledge and skills, since they'll package it in the easiest to understand format, progressing step by step into more complex ideas. But if you've got more time than money, it's all out there if you look for it.
@@caddywampa6602 i just dont know how to learn effectively i guess. Too
many topics and it becomes kinda hard. But i will take it slow and easy.
Yeah this video made me question my knowledge on the minor axis when I saw that part. His minor axis isn't perpendicular to the long axis of the ellipse.
How do you find the vanishing points for the first examples 2nd cube. So I've been drawing the cube and I realized my vanishing points are so off that it looks like a rechtangle is there a trick? or just experience?
Please show a video on portrayal with colour pencils. Can we use canvas cloth material for colour pencil portrayal, please send reply.
how do you decide where to put the vanishing points?
The vanish points are based on the different points of the squares on the first row and their vertical counterparts. I think? After that, the vanishing points are based off the minor axis
First 2 VP's are located by the radius markings of the plane's ellipse, which must be perpendicular. Converge the radii to the horizon line.
The 3rd VP is located through converging the ellipse's minor axis towards the horizon line. this is also how the 2D plane extrudes to form a 3D shape.
Note 2nd and 3rd VP only applies if the axis aren't parallel, otherwise they would be infinite.
dan at 0:45 where did you learn this method of rotating? is it from a book? can you tell what book please. thank you.
How do you know the depth of the cube on 1:13?
I still do not understand how he finds the minor axis of the ellipse. I understand that it is the "straight up" of the box he will draw, but I do not undnerstand how he finds it.
Like a square, the ellipse has two axis/lines that divide it in quarters... the shorter one( the one that always goes in the direction of the horizon line/ meets the horizon) is the "MINOR" one, and the long one is the "MAJOR" one.
method to find convergence point in rotating boxes?
this video is like an anime music video.
im really struggling to find a good way to find the minor axis. Any advice? I bet its just the shortest bisector of the shape youre working with, but its kind of hard to see that offhand. Is there any method relating the angle of the minor axis to the other components of the base plane?
The angle of the minor axis depends on the position of the plane in regards to where the vanishing points are whether that’s left of right of the plane. But if you’re just free drawing a plane with an ellipse it’s the shortest distance between two points on the ellipse and major axis is the largest distance between two points in an ellipse. If you’re familiar with trigonometry just go see a definition of major and minor axis you’ll understand quickly. Here’s an exercise for you, draw at least 10 different ellipses on paper in different orientations then just point out the minor axis by marking it the shortest distance of the ellipse by either measuring with a ruler if you want to be exact of just eye ball it. Don’t overthink it, if you look at the two point perspective cubes the minor axis goes to the vanishing points depending on the orientation of the plane.
How are the VPs established?
Within the 1st 10 comments. By the way great video👍🏽
👏👏👏👏👏👏👏👏👏👏
My head hurts 🤕🤕🤕
how to define minor axis
6:14 Actually that's not always true
Teaching method is great but too fast explanations because that reason hard to understand!
How does he know how tall you should make a cube from an ellipse in perspective, when he say he's "using the length of the radius" as a measure? In perspective, each of the radius (radiuses?) that divide the ellipse look different from each other because of vanishing points, and none of those lines depicts the actual radius of a (flat) circle, which would be used to construct our cube. Does he mentally draw a square and a circle without perspective so he can get the actual radius measured? Kinda like reverse engineering the plane+ellipse that are already in perspective? Because I'm not seeing any on-screen step that's giving me the actual length of such radius.
I prefer to learn the first technique u showed , but you just zoom past it very fast without explaining somethings, anyway nice video ill try to study the technique visually and follow what you do step by step :)
Hi
Sides leading to horizon are too long. Very common to do. I do it all the time. For me, seems like when picking where to end the plane it is right but looking later it's too long. IMHO. I didn't measure anything. Just from the way it looks.
Hello Dan, just wanted to let you know you did the top one wrong. Since the arrow is on the vertex of the box at the top, both the side and the top plane should be equally the same size, but instead of a view angle from 45 degrees, what you showed was more of a 20 degree view angle, both the top and the side should be represented equally; same again with the bottom.
PS: You also shouldn't draw your elipsis in a fashion of fuzzy lines, use your shoulder and arm with clear concise lines!
thanks
i love it but i think you cut it out too much sped it yp too fast that i find it hard to follow fully understand it, what a pity.
am i the only one who hears "harassing line" ?
I need chinise subtitile plz:(
I am not understood anything! Oh god, help me
It’s kinda confusing tbh... :-/
I like how you never actually explain how to perfectly draw a square plane in perspective lol, effectively making this entire video useless
Wierd method of rotating objects, it would be much easier to just use the whole circle to construct the rotation of the cube
how do you decide where to put the vanishing points?
The less we see of the face, the closer the vanishing point. The distance/magnitude depends on the focal length. Really close points that converge quickly will indicate a wide angle view. Far points will be far away and zoomed in.
@@0ia This is determined in drawing (to my knowledge) by a station point that defines the cone of vision and 45 degree vanishing points
But it looks like he just freehanded them with a guess
@@ajregalia1334 I wonder if the station point analogy still works with curvilinear perspective, or if it only applies to the linear simplification
@@0ia I'm actually not sure! I need to look into that
@@ajregalia1334 let me know what you find :)