On 9/24/25 09:40, Bald Eagle wrote:
> So, I need to question the whole top row.
> I refer to the disc {} in its form with a hole using the mathematically accurate
> term "annulus".

I think the answer to most (all?) of your questions about the disc is 
the inside test is supposed to be equivalent to a plane{}'s inside test 
using the disc{}'s normal.

In yuqk I'm leaning heavily toward changing the disc{} to a patch object 
with an inside test that always returns false. To fix it, I suspect I'd 
have add internal dual cylinder bounding, but cost wise this will be not 
much different than a CSG difference with two cylinders...

FYI. You are correct the issue in v3.8 beta2 is bounding related. 
Attached an image rendered with yuqk using the '-b' flag to turn 
bounding off. The yuqk fork turns bounding 'completely' off with '-b' 
where v3.7 and v3.8 made code changes which pushed the last level of 
bounding for shapes outside the +-b flag's control(*). The yuqk fork has 
restored the v3.6 and prior behavior - and the restoration is certainly 
helpful here for debugging.

(*) - The change offered a performance optimization in some situations.

---

Ah, I see the cone is doing something weird where the two radii are 
negative. We should probably just not allow negative radii arguments in 
the parser - for any shape.

Bill P.

Aside 1: Long on my todo list is breaking apart the cylinder and cone 
code. Today it's all munged together making both slower and more complex 
than they need be.

Aside 2: clipka fixed something with the cone behavior (my memory 
otherwise fails) in v3.8. I expect v3.7 cone behavior is different in 
some aspect.

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