On 20/09/2016 10:04, John Greenwood wrote:
> scott <sco### [at] scottcom> wrote:
>>>>> If you're on to something then some working
>>>>> example code will go *far* further than just a text description.
>>>>
>>>> Totally agree, I am working on it.
>>>
>>> And here it is:
>>
>> A good start!
>>
>> How would you go about doing the union (or difference) of two rounded
>> cubes? I tried to modify the code to do this but couldn't get it to
>> work. If that works nicely then I think you're on to something...
>>
>> BTW you could always use a macro for each element, that depending on
>> some global switch, either used the standard POV non-rounded primitive
>> (for speed of setting up the scene) or the isosurface variant (for final
>> render).
>
> Excellent idea.
>
> And here are unions:

Looks good.

Just one small thing though, it looks like something odd is going on 
with the top (+y) face of the cube and also the join with that face and 
the sphere (maybe related). There is a "ridge" of some kind along the 
join, and the entire top face of the cube bends upwards way before the 
round should start (see attached).

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