Long shot. But I have to ask. I typically paint or draw on larger sizes, and since starting to get into understanding perspective more. I've begun wondering, what tools to use to measure out the degrees and creating the cone of vision with? Like my standard equipment for these types of measurements, and compass/divider are just way way too small. Their suited for calculus geometry haha. So tiny! Are there large ones? The 30, 60, 90 degree ruler, yeah sure. Seen those around for woodworking stuff and such. But the compass?
Yes, they actually do have larger triangles and compasses. I have a large triangle that’s about 12” on either side of the right angle and they do make large drawing compasses as well. However, before you invest in new gear, instead of inscribing a circle for the cone of vision, you can you can find the point of the cone from the center of vision and draw a square instead. It will be close enough to give you a clear idea of where you need to stay inside to avoid distortion.
@@DrawshStudio thank you so much for your reply! I did take to google after I wrote my comment, and did not find much in ways of bigger compasses. I'm sure they're there, but probably geared towards construction work, or similar. Being fairly expensive. But I like your advice about constructing a larger square, and get a cone out of that one. It's solid.
My pleasure :) The square works fine but here are two options if you want a large circle. www.amazon.com/Alumicolor-18-Inch-Beam-Compass-4110-1/dp/B0015AQLS4/ref=asc_df_B0015AQLS4/?tag=hyprod-20&linkCode=df0&hvadid=198104760853&hvpos=&hvnetw=g&hvrand=12495876275397819806&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9031211&hvtargid=pla-323865210643&psc=1 www.amazon.com/gp/aw/d/B086RV9W72/ref=sspa_mb_hqp_detail_mobile_aax_0?ie=UTF8&psc=1&sp_csd=d2lkZ2V0TmFtZT1zcF9ocXBfcGhvbmVfc2hhcmVk
Hi man, i'm trying to understand the station point and cone of vision and it seems i probably having a hard time understanding the picture plane too. I would love if you could enlight me on those 3. My understanding is that if you drew on a physical viewfinder whats behind, you'll get a perfect representation of the image behind it so that mean that if you just place the viewfinder flat on a table in front of you the viewfinder is then the equivalent of the drawing you would have made on a piece of paper so my questions are: -1. Is the picture plane a mental/imaginary ( in your head ) equivalent or same thing as a physical viewfinder ? -2. And if so does it mean that to be able to draw you should have the viewfinder built in your head "picture plane " and frame your image into it ? -3. And if so how do you feet your image into it ? Example: a 160cm tv on a 21 by 29 piece of paper ? Sighting ?
What is the difference from expanding a 60* CoV to 90* CoV, as compared to moving the station point down from the horizon line? In both cases the circle gets bigger, but im not grasping why this matters (i'm sure it does, im just not understanding it right now). Could someone help me understand? Since this is 2 point perspective, we do not use SP as a third point, right, so? I'll watch it again a few times and try to draw it myself too..
That’s a great question :) by moving the station point down, the viewer is moving away from the picture plane which will change how flat or “normal” the perspective looks. If you simply change to a 60 degree cone of vision, there is more space but it will begin to look more distorted like a wide angle lens on a camera.
is the cone of vision independent of where I put the 2 vanishing points (assuming 2 point perspective)? what if my vanishing points are pretty close to the edge of the cone of vision, or inside the cone of vision? I guess what I'm asking is, is there a rule for where my vanishing points should be, in relation to the cone of vision? or do you just place the vanishing points anywhere outside the cone of vision, as long as it doesn't seem to be causing too much distortion?
The cone of vision is dependent on the station point. The vanishing points are also dependent on the station point. So they must be in sync to make the work correct.
Glad you like the video, thanks for letting me know :) That far left box is so close to the vanishing point that the distortion is extreme making it look almost bent, but those Y axis lines should be vertical.
@@DrawshStudio Wow you're right. I quickly checked in MSPaint and the lines are indeed all vertical. The same kind of optical distortion happens on the right side of the green box for me. How peculiar.
Good question :). The field of view is the maximum area a device can capture (in degrees), which is usually heard in photography but also perspective. The cone of vision would essentially be the same thing as it’s the cone (circle in degrees ) the viewer would be able to view subjects without distortion. Of course, we can draw outside of the cone of vision and it would be technically correct it would just look wonky.
@@DrawshStudio thats what I thought because when I saw those Canon or Nikon field of view chart, you can see at the left table it says focal length. Example 28mm is equivalent to 60 degrees field of view. You mentioned 60 degrees cone of vision maybe they are the same.
