In article <POzfOBclcGzgXuL4XVuaeAuoKOY6@4ax.com>, pet### [at] usanet 
says...

<snip>

> If you could turn those (really useful!) utilities into povray macros,
> I am sure many people will be thankful for making their lives a tad
> easier. About your question, I would usually use a macro for such
> tasks because it spares some trouble with switching consoles, copying
> & pasting etc.

This could be very interesting to do at some time. One of my problems 
though is that modelling in POV has turned out to be so fun that I've 
found it a little difficult to give myself time to finish reading the 
manual ;-). Despite this I knew a little about macros but since I had 
lots of code related to 2D/3D geometry lying around on my machine it was 
straightforward to 'tweak' it for this use.

I have also wondered that having lots of macros as opposed to numercial 
'constants' and coordinates might mess up the POV file since what I'm 
doing is not 'dynamic' - the objects don't change shape, not even in an 
animation. But I'm probably still a POV-beginner and don't have a good 
'feel' for how to do some things although it's improving - I have already 
partially rewritten the oldest (a few weeks) parts of my Cassini 
spacecraft POV file.

An example of what I have used my utilities for is creating a prism-like 
(as seen from a distance) object which has round corners when seen close-
up. I didn't achieve results I was satisfied with by using quadratic or 
cubic spline prisms (which is what I tried at first).

Bjorn Jonsson
bjj### [at] zzzmmediais - http://www.mmedia.is/~bjj
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