Ring Thickness bug?

[Frank Noschese]

Hi everyone,

I noticed that the thickness of a ring is not defaulting to be 1/10 of the ring’s  radius. Is this a issue for others?

Thanks,

Frank

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Frank Noschese
Physics Teacher
John Jay High School
Cross River, NY 10518
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[Frank Noschese]

I just noticed that the default ring thickness works correctly for GlowScript VPython 2.9, but not for 3.0 and 3.1.

[Bruce Sherwood]

Yeah, this is very strange. A quick look at the code implies that there shouldn't be a problem. I'll look deeper. Thanks for the report!

Bruce

[Bruce Sherwood]

Fixed, though as usual you might have to clear your browser's cache to get the correction. Thanks again for the report!

Bruce

[Frank Noschese]

Hi Bruce,

Sorry for the late reply, but the problem still persists on my end. I cleared my cache and tried different browsers. For example, the code:

GlowScript 3.2 VPython
ring(radius=0.2)

produces

Is this just a problem on my end? Can anyone else replicate this?

Thanks,

Frank

On Thu, Oct 14, 2021 at 7:55 PM Bruce Sherwood <bruce.s...@gmail.com> wrote:

Fixed, though as usual you might have to clear your browser's cache to get the correction. Thanks again for the report!

Bruce

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[Bruce Sherwood]

It's the documentation that's wrong when it says that by default the thickness is 0.1*radius. What I find is actually the case for all but version 3.0 is that the default thickness is 0.1, no matter what the radius is (and in version 3.0 the default thickness is 0.5, independent of the radius).

Surely the rule should be what the documentation claims, namely thickness = 0.1*radius. Shall I change 3.2, which is brand new, to follow the documentation, namely that the default thickness is 0.1*radius?

I misread your original report and fixed in 3.1 a related error.

Bruce

[Frank Noschese]

I am in favor of having the default thickness of a ring be 0.1*radius, which makes it looks like a nice ring. (If I recall correctly, this is similar to how helix behaves, right?)

Thanks again, Bruce!

- Frank