On Thu, 05 Feb 2004 18:38:39 -0500, Christopher James Huff
<cja### [at] earthlinknet> wrote:

>> >Do you think you could add toroidal components? Or boxes and sharp-edged 
>> >cylinder and cone components? The latter two shouldn't be too hard if 
>> >you have planes working...

Oh, oh.

Given a plane (with some thickness as I used it as a BLOB_ELEMENT):

 - Intersection: you only have to check where the ray enters/exits the
   space of influence ~= distance to the plane's origin.
 - Normal: trivial
 - Inside: trivial

Now take an arbitrary object:

What is the reference point/plane/surface/... and/or metric in space
to compute the 'field value' which in the end defines the surface of
the element?

If we can provide a consistent solution for a special object type I
would agree, it is not hard to add it (to BLOB).

>Heh...well, a box is essentially six plane components with some 
>clipping. And sharp edged cones/cylinders would involve capping with 
>plane pieces rather than sphere pieces. The blob2 patch supports these 
>partially...still a few kinks to work out.
>
>Other ideas: rounded box, superellipsoid, a third kind of cone/cylinder 
>component with torus-rounded edges, meshes...

Let's talk about it, may be we can create some 'tools' for the artists
;)


-- 
Andreas

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