View Full Version : Perspective question - please help!

10-03-2006, 07:41 PM

http://www.coldfusiongames.com/James Images/perspective.jpg

Can you see the light lines heading toward the horizon (there is an "x" next to the bottom one). How do you draw line "x" to the correct length in perspective on doors like this one? Thanks!

James Smith

10-05-2006, 12:30 PM
i have no idea what you mean. :blink:
What does X have to do with the door? Which direction is the line going (typically a line has 2 points, not one).

10-05-2006, 12:40 PM
i know exactly what your talking bout' james...unfortunately thats a tricky one that I can't seem to answer..i'm sure one of the Guru's will assist you shortly :)

MadCow Menu
10-05-2006, 04:50 PM
There are a whole bunch of links for perspective in the Penciler Links (http://digitalwebbing.com/forums/showthread.php?t=82758) thread.

Perspective Links

Perspective Tutorials:

Learn the basics of perspective - what it is, who invented it, and how to draw it, with this short introduction. Learn to do simple 3-D boxes in one-point and two point perspective.

One-Point Perspective

Two-Point Perspective

Three-Point Perspective

A short rundown of the basics of One to Six point perspective

This website explains pretty much everything that has to do with measuring points when constructing a two-point perspective grid:

Measurement and Perspective in anatomy.
Check it out!
Has a bunch of pop-ups. Only check it out if you don't mind them or have a decent pop-up blocker.

Lessons on how to draw buildings in perspective.

One of these will have it.

10-06-2006, 03:28 AM
Eyeball it. The rest of us do. :laugh:

10-06-2006, 10:14 AM
Actually, you're asking the same thing as last time !

A square with the same dimensions as the door-width, gives the depth of the door when open.

Choose a VP to the right or left to find the depth of the square (in 1-point perspective). It doesn't really matter where you put that point: too close (to the central VP) gives distortion, too wide makes the image flat (just like in 2-point perspective). It must be on the horizonline though.

Right now, your door is way too long (your diagonal VP is way too close, it's within your picture ... can you find it ?).

Drawing this from life will give you a much better understanding about perspective than all these rules do, so I'd recommend to do just that !

Hope this helps, if not, let me know what's not clear !

10-06-2006, 01:34 PM

Make a 4x4 grid (red) with the center being at the door hinge. Draw lines (blue) from the corner of the square that will be the closest to the door when it is open, to the points that are 4 squares away and 1 square towards the opposite corner of the grid. Mark points where the line (blue) cross the grid closest to the corner they meet at. Also mark points at the mid-way between corners on the grid. Connect these points and you have the "arc" (yellow) the door will travel when opened.

Pick any point on the arc and draw a line from it to the door hinge. Extend this line to the horizon and you have the vanishing point for the door.

I hope this makes sense and helps you.

- Steve

10-06-2006, 09:19 PM
Wow! Thanks a ton, Steve, and thanks to everyone else, too! I understand, now!


10-06-2006, 09:24 PM
great links