Lance Birch wrote:

> Helix is in mine (as I mentioned in an earlier post).  But a helix by CAD
> and graphics terms is not 3D.  I can't remember the word for it, perhaps
> someone else knows.  What is the word for the point that draws a path?
> There is a special term for this, and a helix in the 2D sense is one of
> these, where the point is the end of the perimeter of an unwinding 2D shape.
> But, once again, a helix can be 3D.

If I understand the concept right, in 2D it would only produce a circle, thus of
little interest to the 2D world, that would be what one would call a degenerated
helix (mathematical expression, no bad thoughs there).

In 3D it makes , well a helix ...
Again, if I'm not mistaken, I think you call generally these type of functions
developpants, but a helix would be one case of them. But my maths are a thing of
the past, so there are not too reliable.

Cheers,
Al.

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