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William F Pokorny <ano### [at] anonymous org> wrote:
> On 3/4/22 16:29, Chris R wrote:
> > One of the things I've noticed is how fast and clean isosurfaces based on built
> > in functions, like f_rounded_box are, and how bad any of my attempts at doing
> > extruded shapes end up being, so I thought about using an isosurface to extrude
> > f_rounded_box.
>
> Cool shape! :-)
>
> Yep, isosufaces are sometimes more flexible and faster than other
> shape/surface options! However, as with most things in POV-Ray, where
> they work best depends greatly on particulars.
>
> Note. IIRC, the f_rounded_box() function has a changing gradient outside
> everywhere and into the rounded box only to the rounding radius - after
> which the returned values become fixed 'inside.' This makes the function
> difficult / impossible to use in many more complex situations. In other
> words. it's a function which can be difficult to use other than as a
> stand alone shape(1).
>
> Bill P.
>
> (1) - Why the povr fork added an explicit f_box() inbuilt.
Yes, I have noticed that, especially when attempting to add a wood pigment
function to the exterior with the grain pushing into the box with a very small
rounding radius. It seems fine for a grain extending out of the box.
-- Chris R.
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