On Fri, 22 Sep 2000 13:59:28 +0200, "Marc-Hendrik Bremer"
<Mar### [at] t-onlinede> wrote:

>I wonder if this could be implemented for objects quite easily too, so if a
>ray "asks" for the first intersection with an object, it is altered first.

>That would be useful IMO. You could bend any object quite easily (by just
>bending the "co-ordinate-system"). More "natural" looking objects could be
>possible.

Well, since a ray is defined as a starting point (which is fixed) and
a direction, you'll only be able to perturbate the direction vector
(not to be confused with the camera direction vector). That's what the
camera normal is there for.

What you're looking after is adding turbulence to the intersection
point. But, in order to do that, you'll first have to find it first,
and then it already has to be perturbed. The only way you can achieve
that is to have the turbulence biult into the object equation, in
qhich case you'll have to resort to using isosurfaces, which are
currently available in MegaPOV and will be available in POV 3.5


Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] usanet
TAG      e-mail : pet### [at] tagpovrayorg

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