On 16.10.2026 2:49, Bald Eagle wrote:
> We had a visit from some Youtubers today,
> 
> (I'm right at the beginning, don't blink, or you'll miss me  :D )
> https://www.youtube.com/shorts/u-b6RyFht3s
> 
> During the little pow-wow that they had inside our store, Tiger Stacker was
> telling alittle story about how he learned to mint his own coined silver rounds,
> and at first his weight was off because he neglected to account for the fact
> that the coined round wasn't a perfect cylinder, because the designs on the
> obverse and reverse are recessed relative to the rim.
> 
> Trigger warning:  this may be a shock to some of you.
> 
> My mind immediate went to POV-Ray.
> 
> There ought to be a neat way to do this using a mesh or heightfield of the
> design and a cylinder.
> 
> I'm thinking that there should be a way to take a design from a 3D printing
> file, or a depth map, or a heightfield, and subtract it from a cylinder and
> calculate the volume.
> 
> Or just subdivide the regions between the obverse and reverse, and sum the
> volumes of the ... whatever shape those "parallelpipeds" are called.
> 
> No one needs to implement this - just issuing a call for ideas and different
> approaches.
> Obviously, I might be able to brute-force it with trace (), but I was wondering
> if there was something more efficient and ... elegant.
> 
> - BE
> 

Sure there is: open an image you were going to use as a height filed and 
sum all the pixel values together - that will be the "volume" in some 
arbitrary units :-)

Surely I can write a simple thingy in Python for this, but what is it 
good for?

-- 
Ilyich the Toad
https://dnyarri.github.io/

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