Sijun Forums :: View topic - Determining right angles and other such angles in perspectiv

aquamire · Posted: Thu Dec 13, 2001 10:39 am

How can you determine a right angle in a perspective drawing when you have multiple vps? I know you can do it with a plan (http://www.teamgt.com/forum/cubes01.htm), but is there a method of doing it without a plan or do most designers just eyeball it? It would seem to me that doing a plan, although acurate, is not always the quickest and easiest way of determining angles when it comes to complex forms and scenes.

Silverwolf · Posted: Thu Dec 13, 2001 3:20 pm

Not as far as I know.

The plan, (topview method), is about the best that I know of.

It's kinda hard, especially in the beginning of a piece to draw a right ange in perspective as any angle can be a right angle what determines the "sharpness" of the angle in the perpective is how far away from the object the viewer is and how much, (how wide an angle), they can percieve. The first angle that you put on to the paper determines the perspective for the whole piece. I personally use the top view thing whenever I have room and just have a good guess at the rest, or determine the orientation of the object I'm drawing, (objects that line up, that's edges are parrellel, have the sam vanishing points regardless of where they are on the page), so determining the vanishing points of a box in the middle of the page that's edges are parrellel to, (ie pointing in the same direction in the top view), the object that I want draw way off in the distance on the side of the page, (very hard to put in the plan because you end up needing a huge piece of paper), gives me the appropriate vanishing points and heights, allowing me to draw it reasonably accurately without having to go to all that much trouble.

Get all that? Upon re-reading I'm not sure I did, I think I could have put that a little better but oh well. Email me if you have any questions...and I'll try to be a little less confusing...

Catchya.

Derek · member Member # Joined: 23 Apr 2001 Posts: 139

It's actually not all that difficult, but I'm not sure if I can explain it without diagrams. Check any previous topics for discussions on perspective, I believe someone posted exactly what you are looking for...

[ December 13, 2001: Message edited by: Derek Smith ]

aquamire · Posted: Fri Dec 14, 2001 5:08 pm

Thanks very much, both of you. Did some searching and found a lot of good info from you Derek. You've got a lot of good and insightfull things to say.

Derek · member Member # Joined: 23 Apr 2001 Posts: 139

Aww... umm... err... well, gee.
In other words, thanks, aquamire, I really appreciate that.
Please post back here and let us know if you found the info, if not I'll get a couple of things scanned this weekend and send them off.