If I'm wrong, no harm no foul I guess but just to be safe: In perspective lessons the axis they're talking about is the minor axis. The axis being talked about in this video is the major (or long) axis which is perpendicular to the minor axis. If the lesson is telling you to do anything (like mirror across the axis) and you're using the long axis instead of the minor axis it's going to cause major issues. I did this when I first started and it mixed me all up. If you already knew this, my bad
the half of the disc closer to you appears larger, both in height, but also in width, so the real center of the disc is not in the middle of the ellipse, and sits further back. The line that goes across the center of the disc isn't the widest of the ellipse, it is compressed by perspective. Finally, a line accross the disc that is closer to us is inflated by perspective and is therefore the largest diameter of the ellipse.
Dude if I knew back then what I know now… it’s so weird that I was never able to hammer this down until now and right when I go to search it proko posted these videos. So basically whatever major axis you draw on an ellipse decides its perspective
Wow, that an answer to a question I've asked not so long ago! I genuinely thought perspective would distort an ellipse. It staying completely symmetrical is surprising to me. Thanks for the explanation.
One of the first few perspective drawings I did was a nocked over CD cover with CD's shown from all the different angles. I made the shading from how much or little I layered the outward lines of the disc
We recently got a round table with a circle in the middle and it bugged me that it felt like the circle wasn't centered no matter from what angle i saw it, this explains it.
when you get into product design sketching courses, they tell you that you don't draw ellipses by vertical and horizontal, you rather do it with diagonals ;)
Very helpful! Is there a method to drawing ellipses in perspective? I've been trying to draw circular tables in two point perspective and i can't seem to get the tilt right
from what i can tell, in perspective the points that appear to be at the ends of the widest line of the ellipse are actually closer than the actual ends of the axis line, so if you drew the axis on the record the ends of the line would appear to be higher than where you see the ends of the widest point. hope that made sense!
I think that part is the focus of the elipsis. You get 2 and iirc there is math behind it to make it so that the sum of it against the side plus to the x axis is constant Dont take my word i dont recall it correctly
Ok I intuitively get the axis thing because of foreshortening, but is the silhouette really a perfect ellipse from that angle? It should be subject to the same foreshortening, right?
I keep on re watching it but i still sont really get why the center line is there? I mean why? The center will still be at the same place if you drew them and you lay the disk....? I need help understanding
Think of foreshortening. How if you hold a paper up and rotate it towards you in the same way. The side closer to you would appear kind of like it's getting wider, and the far side thinner. Same principle at work! Perspective warps things.
A lot of people would imagine that middle point is still in the middle when you rotate the disc. But it really moves back in our perception for the same reason that if you rotated a piece of paper towards you in the same way, the front side appears larger than the back side. Because of foreshortening and diminution.
@@ProkoTV view can either be perspective or orthographic. Like cubes in math construction or in real world. Anyway, i was feeling that something is off, and if you do it on thin piece of paper it's much harder to reproduce. This effect might appear be more due to width of the disk
@@Oblivion4eg Seems you have all the answers you need here already. An orthographic perspective doesn't have diminution, the thing that creates this effect.
