Parallel lines not parallel

If you are a new Irrlicht Engine user, and have a newbie-question, this is the forum for you. You may also post general programming questions here.
Post Reply
Alexander.Popov
Posts: 2
Joined: Sat Mar 31, 2018 7:03 pm

Parallel lines not parallel

Post by Alexander.Popov »

If I choose the orthogonal projection, I see the vertical lines are vertical, but the horizontal lines do not look parallel to me.
Why is that so?

Image
CuteAlien
Admin
Posts: 9628
Joined: Mon Mar 06, 2006 2:25 pm
Location: Tübingen, Germany
Contact:

Re: Parallel lines not parallel

Post by CuteAlien »

I think that's an optical illusion. Do measure it with some ruler on top of the screen (or copy-past it to Gimp or some tool like that and measure in there). The height of the yellow blocks is exactly the same on the left and on the right of your image.
IRC: #irrlicht on irc.libera.chat
Code snippet repository: https://github.com/mzeilfelder/irr-playground-micha
Free racer made with Irrlicht: http://www.irrgheist.com/hcraftsource.htm
Alexander.Popov
Posts: 2
Joined: Sat Mar 31, 2018 7:03 pm

Re: Parallel lines not parallel

Post by Alexander.Popov »

CuteAlien wrote:I think that's an optical illusion.
I've measured and indeed it's an illusion. Thanks!
Mel
Competition winner
Posts: 2292
Joined: Wed May 07, 2008 11:40 am
Location: Granada, Spain

Re: Parallel lines not parallel

Post by Mel »

Illusions... those lovely bitc*es :)
(The blue and the black segments are always of the same length)
Image
"There is nothing truly useless, it always serves as a bad example". Arthur A. Schmitt
Post Reply