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Varying the radii works...
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Attachments:
Download 'blob.jpg' (31 KB)
Preview of image 'blob.jpg'
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Il 23/06/2022 23:27, Dave Blandston ha scritto:
> ingo <ing### [at] tag povrayorg> wrote:
>
>> Have you considered blob-sweeps? You could use the .z in the vector for
>> the strength of the blob.
>
>
> This looks like a solution. If the b_spline function could be
converted to SDL
> in such a manner that it would generate points and corresponding
diameters at
> specific intervals (the distance between points would have to remain
constant
> regardless of the curvature) then a blob element could be placed at
each point
> and the diameter could be converted to a blob strength.
>
Very nice!
Paolo
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in news:web.62b4d93618b1901cb80481b2607c1b34@news.povray.org Dave
Blandston wrote:
> If the b_spline function could be converted to SDL
Have a look at curve.zip https://ingoogni.nl/download/ it has cubic-bsline
and beta spline, amongst others.
--
https://ingoogni.nl
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ingo <ing### [at] tagpovrayorg> wrote:
> Have a look at curve.zip https://ingoogni.nl/download/ it has cubic-bsline
> and beta spline, amongst others.
Oh wow that's really amazing! Arrays of arrays! Also the book referenced in the
file appears to be very well written. Thanks for sharing this. I will see if I
can make use of this code. As is often the case with POV-Ray, the limitation
will be my own limited intellect.
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On 2022-06-23 17:27 (-4), Dave Blandston wrote:
> ingo <ing### [at] tagpovrayorg> wrote:
>
>> Have you considered blob-sweeps? You could use the .z in the vector for
>> the strength of the blob.
>
>
> This looks like a solution. If the b_spline function could be converted to SDL
> in such a manner that it would generate points and corresponding diameters at
> specific intervals (the distance between points would have to remain constant
> regardless of the curvature) then a blob element could be placed at each point
> and the diameter could be converted to a blob strength.
>
> This works perfectly when the two character strokes that are intersecting each
> other differ greatly in diameter but when their diameters are similar then a
> little bump results so some tweaking would be necessary.
>
> Thanks for the suggestion Ingo! Even if the b_spline math turns out to be beyond
> my capabilities, I think you have provided a solution. More testing would be
> necessary to make sure that tight turns don't cause blob elements to connect
> that shouldn't connect.
My SphereSweep module has two kinds of B-spline blob capability, so you
don't have to do any math. And for the purists out there, it's all SDL.
See if it's something you can use.
https://github.com/CousinRicky/POV-SphereSweep
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Cousin Ricky <ric### [at] yahoocom> wrote:
> My SphereSweep module has two kinds of B-spline blob capability, so you
> don't have to do any math. And for the purists out there, it's all SDL.
> See if it's something you can use.
>
> https://github.com/CousinRicky/POV-SphereSweep
This will work for my project with some slight modifications - is that OK?
Specifically, I'll add one more argument to the SphereSweep_Blob_field () macro,
which is the blob threshold setting, and I'll need to modify the
SphereSweep_Blob_field () macro to allow multiple data sets/arrays to be
processed as one blob.
I recall seeing your airplane demo image quite a while ago and now that I'm
looking at the entire project I do recall its purpose - I wish I had remembered
it when I started my project! Thanks for pointing it out. After looking at your
code I see that it's extremely well-done and the documentation is exceptional. I
appreciate your efforts greatly.
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On 2022-06-24 21:19 (-4), Dave Blandston wrote:
> Cousin Ricky <ric### [at] yahoocom> wrote:
>>
>> https://github.com/CousinRicky/POV-SphereSweep
>
>
> This will work for my project with some slight modifications - is that OK?
Of course, as long as you attach your name and the date that you made
the changes. The license text is included with the download.
> I recall seeing your airplane demo image quite a while ago and now that I'm
> looking at the entire project I do recall its purpose - I wish I had remembered
> it when I started my project! Thanks for pointing it out. After looking at your
> code I see that it's extremely well-done and the documentation is exceptional. I
> appreciate your efforts greatly.
You're welcome!
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Cousin Ricky <ric### [at] yahoocom> wrote:
> My SphereSweep module has two kinds of B-spline blob capability, so you
> don't have to do any math. And for the purists out there, it's all SDL.
> See if it's something you can use.
Success! I can't believe that what I needed already existed. Awesome Cousin
Ricky!
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Attachments:
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Preview of image 'untitled.jpg'
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Op 25/06/2022 om 23:07 schreef Dave Blandston:
> Cousin Ricky <ric### [at] yahoocom> wrote:
>> My SphereSweep module has two kinds of B-spline blob capability, so you
>> don't have to do any math. And for the purists out there, it's all SDL.
>> See if it's something you can use.
>
>
> Success! I can't believe that what I needed already existed. Awesome Cousin
> Ricky!
Wow! :-)
--
Thomas
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