To LUGNET HomepageTo LUGNET News HomepageTo LUGNET Guide Homepage
 Help on Searching
 
Post new message to lugnet.cad.rayOpen lugnet.cad.ray in your NNTP NewsreaderTo LUGNET News Traffic PageSign In (Members)
 CAD / Ray-Tracing / 2069
2068  |  2070
Subject: 
Re: Simple POV-Ray Question - Perspective
Newsgroups: 
lugnet.cad.ray
Date: 
Fri, 23 Jan 2004 17:59:19 GMT
Viewed: 
1957 times
  
In lugnet.cad.ray, Larry Pieniazek wrote:
In lugnet.cad.ray, Kevin L. Clague wrote:
In lugnet.cad.ray, Shaun Sullivan wrote:
Hi All,

I should know this ... what's the trick for turning off "perspective", if you
will, so that you can do a straight-on side view?  That is, to remove the
"vanishing into the horizon" effect?

ISO views, is that what it's called?  Ugh ...

Using orthographic does not always work.  You can get the same effect by seeing
the camera angle to 0.1

Don't you then have to move the camera a ways back to get all your objects in
the image compared to larger camera angles?

I've run into this problem, and my caveman-sophistication led me simply to
translate the object a little to put it back in line with the look_at
coordinates.  Even so, I often have to change the "PCT" value to 5 or 10 to
accommodate all of my supercool renderings in the image window.

But now that I think about it, I guess that would work best if your whole scene
is a single object, so it's hardly a panacea.

This is what I tend to do, long ways away, small canera angle (anaogous to
"telephoto" in real photogs, the images there have very little perspective
compared to normal which in turn has less than "wide angle").

The downside of this is that if you are using fog or mist, your primary scene
objects may tend to grayout a bit.

That sounds nifty.  I'll have to check it out (and I'd like to experiment with
more extensive atmospheric effects (more liberal media, perhaps.))

     Dave!



Message has 1 Reply:
  Re: Simple POV-Ray Question - Perspective
 
(...) As long as you let L3P calculate the camera distance, the whole model should be visible, and (mostly) fill the frame. I just copied the L3P auto-camera algorithm into LDView, and it works consistently for me with camera angles ranging from 0.1 (...) (21 years ago, 23-Jan-04, to lugnet.cad.ray)

Message is in Reply To:
  Re: Simple POV-Ray Question - Perspective
 
(...) Don't you then have to move the camera a ways back to get all your objects in the image compared to larger camera angles? This is what I tend to do, long ways away, small canera angle (anaogous to "telephoto" in real photogs, the images there (...) (21 years ago, 23-Jan-04, to lugnet.cad.ray)

10 Messages in This Thread:





Entire Thread on One Page:
Nested:  All | Brief | Compact | Dots
Linear:  All | Brief | Compact

This Message and its Replies on One Page:
Nested:  All | Brief | Compact | Dots
Linear:  All | Brief | Compact
    

Custom Search

©2005 LUGNET. All rights reserved. - hosted by steinbruch.info GbR