In article <38e9e4ed$1@news.povray.org>, "Chris Spencer" 
<chr### [at] bluelectrodecom> wrote:

> Thanks for the reply, but you lost me.  I searched the POV help file but  
> I couldn't find a good description or implementation of an 
> orthographic camera.

Section 4.4.2 "Types of Projection", in the manual. Not a real great 
explanation, though. Also look at section 2.4.4.1 "Understanding The 
Concept of Splines". That part of the tutorial has a short "spline 
workshop" scene that includes an example of the orthographic camera.
And check out this demo scene:
POV-Ray:Scenes:camera:camera1b.pov


> How would this help placing an image map?

It doesn't really help in placing one, just in designing one and placing 
the details. Well, it might help get the alignment right...
The idea is you render an image with the orthographic camera, and then 
use that image to place the details on the image map. The image map is 
projected like the orthographic camera by default, so you just have to 
scale/translate it to the same position and size as the camera was.

To make a decal, take a view along one axis with the orthographic 
camera, "paint" on the rendered image, making the overlay, and then 
apply that image as the decal using an image_map.

-- 
Christopher James Huff - Personal e-mail: chr### [at] yahoocom
TAG(Technical Assistance Group) e-mail: chr### [at] tagpovrayorg
Web page: http://chrishuff.dhs.org/

Post a reply to this message