On 10/11/2016 09:35 PM, StephenS wrote:
> ...
>> First image: my work so far on an isosurface rounded_cylinder_section.
> ...
> I will probably switch to
> f_rounded_box(x,y,z, P0, P1, P2, P3)
> from functions.inc.
> I can rotate and place this, but I would still like to know how to do it
> with a cylinder.
>
> My use of min()/max() in the isosurface causes some artifacts at close
> inspection.
>
> Comments welcome;
>
> Stephen S
>
With min, max I think these sorts of artifacts are always more or less 
there at the threshold-seam between functions. They might or might not 
be seen due AA, application or not of noise/displacement to the 
component functions into max/min, ray direction, etc.

Increasing accuracy (smaller value) in your isosurface sometimes helps.

Using a blobbing function instead of - or in addition to min/max - will 
fix the issue in my experience at the expense of the blobbing.

Bill P.

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