Hi,

	I wanted to create an object (bottle, in this case) that has rotational 
symmetry about an axis. So an SOR or Lathe seemed like good choices.

	Consider a bottle. It's base is flat, but the edges of the base are 
rounded and then go up vertically. As I wanted the roundness, I chose 
not to use linear interpolation, and tried some of the other types.

	Getting it rounded was not much of a problem, but then I could not get 
the "line" to go up vertically. To give you an idea as to what I mean, I 
wanted the base to be of radius about 1. So I picked my base points at 
(0,0), (0.95,0).

	Then I had a few points to curve it upwards. Let's say I ended up at 
(1,0.05). Now I just want to go vertically up to about (1,4). How do I 
do it? If I just put one point, it curves. I thought I could put a 
number of intermediate points (1,1), (1,1.5), and so on, but that didn't 
achieve the desired effect.

	In the end, I used a superellipsoid, with some CSG (better solution). 
However, for future reference, is there any way I can get a vertically 
edge using anything other than linear interpolation?

	In general, are there any tricks to dealing with rounded edges or 
corners? A while ago I was trying to make a cube, but with rounded edges 
and corners. The edges can be done with CSG, but it was somewhat of a 
pain and the corners didn't work out...

Thanks,
-- 
Aim Low, Reach Your Goals, Avoid Disappointment.


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                                    anl

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