"Bald Eagle" <cre### [at] netscapenet> wrote:
> "jr" <cre### [at] gmailcom> wrote:
> adding it seems to make no discernable difference to what I now get.
> I don't think he was suggesting it would - he was just commenting on my "ex post
> facto" differencing comment. That's a whole different story.
</blush> misread. apologies.
> > however, _the_ problem is the "pathological" case of parallel-to-camera, as Bill
> > P identified when he asked "what happens with a box". I'm currently wondering
> > whether using a perspective camera for "difficult" shapes mightn't be better.
> > and for shapes like spheres + tori I may get milage our of lowering the vertical
> > resolution (ie thicker slices).
> This almost makes me wonder if you can do some sort of weird wide-angle /
> panoramic render and then re-map it with --- for lack of a better understanding
> and proper vocabulary - an anamorphic camera
I can see what you mean but that's way beyond my .. pay grade.
ideally there'd be a simple way of, say, using a (slightly) offset perspective
camera, and relating that angle to some compensating factor to approximate the
orthographic equivalent (a bit like an effect using a matrix to slant/skew an
object, then reversing that).
> > the Lohmueller tip is confusing. haven't tried yet but the documentation is
> > quite clear that the direction vector is not used with prthographic cameras.
> > have you come across working code which utilises the "trick"?
> I believe you can just make a simple animation of a camera getting closer and
> closer to a shape with a gradient pigment along the object-camera axis. Maybe
> slightly off-axis, so that you can see the effect better.
> The camera will start to exclude all of the parts of the object "behind" it, and
> you'll effectively get a slicing effect.
> I've done this plenty of times by accident when setting up scenes with the
> orthographic camera.
:-) yes, I too have found myself .. inside, unexpectedly. anyway, the
"remainder" would still need to be cut/sliced, so it looks like using a box to
intersect seems unavoidable.
Post a reply to this message