Op 06/03/2025 om 13:46 schreef Thomas de Groot:
> Strangely enough, My search did not show the relevant message(s) in 
> p.programming. I used "Ron Parker + kerning" In the Search bar of the 
> povray.org newsgroups...
> 

...but this seems to be the message:

https://news.povray.org/povray.programming/thread/%3C38B18153.72BE%40aol.com%3E/?ttop=445029&toff=800&mtop=84879&moff=20

Go to about the end of the thread.

-- 
Thomas

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Thomas de Groot <tho### [at] degrootorg> wrote:

>
> ...but this seems to be the message:
>
>
https://news.povray.org/povray.programming/thread/%3C38B18153.72BE%40aol.com%3E/?ttop=445029&toff=800&mtop=84879&moff
=20
>
> Go to about the end of the thread.

Thank you, it appears I hallucinated there to be more and Google hates me.
Couldn't find it searching several ways.

ingo

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"ingo" <nomail@nomail> wrote:

> Thank you, it appears I hallucinated there to be more and Google hates me.
> Couldn't find it searching several ways.

Me neither.
Google sucks the big suck.
I even tried searching specifically for "font metric function" and got nothing.

Useless is being generous.  Search engines today are worse than useless.

However, persistence wins the day!  :)


Welcome back, Thomas.

- BW

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hi,

"Bald Eagle" <cre### [at] netscapenet> wrote:
> "ingo" <nomail@nomail> wrote:
> > Thank you, it appears I hallucinated there to be more and Google hates me.
> > Couldn't find it searching several ways.
> Me neither.
> Google sucks the big suck.
> I even tried searching specifically for "font metric function" and got nothing.
>
> Useless is being generous.  Search engines today are worse than useless.

sort of agree, but perhaps your combined activity has caused Google "to wake up"
:-), typing "ron parker font" in the above 'Search' shows the relevant result,
top of list.

> Welcome back, Thomas.


regards, jr.

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"jr" <cre### [at] gmailcom> wrote:

> > Useless is being generous.  Search engines today are worse than useless.
>
> sort of agree, but perhaps your combined activity has caused Google "to wake up"
> :-), typing "ron parker font" in the above 'Search' shows the relevant result,
> top of list.

I just did exactly that, and that thread isn't on my list at all.
3 pages of results, and not one of them is the proper thread.

It has to do with cookies and all of this "tailored search results" BS
Wish I could use Yandex or some of the other ones from this computer.

We need a private search engine for the newsgroups!

- BW

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I did find these though, which may be of related interest.

https://news.povray.org/povray.text.scene-files/thread/%3C4004808c%241%40news.povray.org%3E/?ttop=441451&toff=350

https://news.povray.org/povray.beta-test/thread/%3C3bd48bf6%40news.povray.org%3E/?ttop=441402&toff=1900

https://news.povray.org/povray.programming/thread/%3C38B18153.72BE%40aol.com%3E/?ttop=445029&toff=800&mtop=84879&moff=2
0

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"Bald Eagle" <cre### [at] netscapenet> wrote

>
https://news.povray.org/povray.beta-test/thread/%3C3bd48bf6%40news.povray.org%3E/?ttop=441402&toff=1900

The explanation in the last post of this thread is the interesting bit. Last
post:
https://news.povray.org/povray.beta-test/message/%3Cslrn9tdjuv.32q.ron.parker%40fwi.com%3E/#%3Cslrn9tdjuv.32q.ron.parke
r%40fwi.com%3E

ingo

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"Leroy" <whe### [at] gmailcom> wrote:
> "Chris R" <car### [at] comcastnet> wrote:
> > William F Pokorny <ano### [at] anonymousorg> wrote:
> > >
> > > Only tricky part is figuring out the base character size and spacing.
> > > I've not found an easy and reliable way to do that as yet. I got to the
> > > above values by trial and error.
> > >
> > > Used box characters for the rectangular frame using the strings:
> > > "┌─────────┐",
"└───&#9
47
> 2;
> > ─────┘" and
"│││││││││&#9
47
> 4;
> > │││││",
> > >
> > > Bill P.
> >
> > If you are using a mono-type font, this worked for me:
> >
> > #local _t1 = text { ttf "fontname.ttf" "A" 1.0, 0 }
> > #local _t2 = text { ttf "fontname.ttf" "AA" 1.0, 0 }
> > #local _t1sz = max_extent(_t1) - min_extent(_t1);
> > #local _t2sz = max_extent(_t2) - min_extent(_t2);
> > #local _unit_width = (_t2sz - _t1sz).x;
> >
> > text { ttf "fontname.ttf" "What the heck?" 1.0, -2*unit_width*x }
> > text { ttf "fontname.ttf" "What the heck?" 1.0, <-unit_width, -1, 0> translate
> > <0, 14, 0> }
> >
> > -- Chris R
>
> I remember this little trick. But I didn't want to be limited to  mono-type
> fonts so I wrote a macro that cut a string into pieces and place each letter
> separately. And promptly forgot about it.

Aah!  In the meantime, I went down a rabbit hole and essentially did the same
thing...

See: https://github.com/carath63/povlibrary
library/libtext.inc
Examples/text_test.pov

Here is an example of using that technique to lay out text around a cylinder, up
a helix, and following a spline.  The spline relies on how close your the
distance between letters lines up with the distance between spline points.  As
you can see, it didn't work very well once the letters moved around the front
curve of the spline.  Still trying to figure out how to fix that.

-- Chris R

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Attachments:
Download 'text_test.png' (98 KB)

Preview of image 'text_test.png'

"Chris R" <car### [at] comcastnet> wrote:
> "Leroy" <whe### [at] gmailcom> wrote:
> > "Chris R" <car### [at] comcastnet> wrote:
> > > William F Pokorny <ano### [at] anonymousorg> wrote:
> > > >
> > > > Only tricky part is figuring out the base character size and spacing.
> > > > I've not found an easy and reliable way to do that as yet. I got to the
> > > > above values by trial and error.
> > > >
> > > > Used box characters for the rectangular frame using the strings:
> > > >
"┌─────────┐",
"└───&
#9
> 47
> > 2;
> > > ─────┘" and
"│││││││││&
#9
> 47
> > 4;
> > > │││││",
> > > >
> > > > Bill P.
> > >
> > > If you are using a mono-type font, this worked for me:
> > >
> > > #local _t1 = text { ttf "fontname.ttf" "A" 1.0, 0 }
> > > #local _t2 = text { ttf "fontname.ttf" "AA" 1.0, 0 }
> > > #local _t1sz = max_extent(_t1) - min_extent(_t1);
> > > #local _t2sz = max_extent(_t2) - min_extent(_t2);
> > > #local _unit_width = (_t2sz - _t1sz).x;
> > >
> > > text { ttf "fontname.ttf" "What the heck?" 1.0, -2*unit_width*x }
> > > text { ttf "fontname.ttf" "What the heck?" 1.0, <-unit_width, -1, 0> translate
> > > <0, 14, 0> }
> > >
> > > -- Chris R
> >
> > I remember this little trick. But I didn't want to be limited to  mono-type
> > fonts so I wrote a macro that cut a string into pieces and place each letter
> > separately. And promptly forgot about it.
>
> Aah!  In the meantime, I went down a rabbit hole and essentially did the same
> thing...
>
> See: https://github.com/carath63/povlibrary
> library/libtext.inc
> Examples/text_test.pov
>
> Here is an example of using that technique to lay out text around a cylinder, up
> a helix, and following a spline.  The spline relies on how close your the
> distance between letters lines up with the distance between spline points.  As
> you can see, it didn't work very well once the letters moved around the front
> curve of the spline.  Still trying to figure out how to fix that.
>
> -- Chris R

To prove my spline layout code is correct, I created some tools for converting a
spline whose values have an arbitrary range into a spline whose values go from
0.0 to the computed length of the spline over the given range of values.  Using
a spline that has been tuned this way gave a much better result in laying out
the text.

-- Chris R

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Attachments:
Download 'text_test.png' (85 KB)

Preview of image 'text_test.png'

"Chris R" <car### [at] comcastnet> wrote:

> To prove my spline layout code is correct, I created some tools for converting a
> spline whose values have an arbitrary range into a spline whose values go from
> 0.0 to the computed length of the spline over the given range of values.  Using
> a spline that has been tuned this way gave a much better result in laying out
> the text.

are you aware that there are spline macros to do this sort of thing?
IIRC, they are in transforms.inc

- BW

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