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Is this effect possible with postscript

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  Is this effect possible with postscript Cecil Westerhof <Cecil@decebal.nl> - 2013-07-25 09:15 +0200
    Re: Is this effect possible with postscript Mark Carroll <mtbc@bcs.org> - 2013-07-25 09:13 +0100
      Re: Is this effect possible with postscript Mark Carroll <mtbc@bcs.org> - 2013-07-25 09:18 +0100
    Re: Is this effect possible with postscript ken <ken@spamcop.net> - 2013-07-25 09:49 +0100
      Re: Is this effect possible with postscript Cecil Westerhof <Cecil@decebal.nl> - 2013-07-25 12:14 +0200
        Re: Is this effect possible with postscript ken <ken@spamcop.net> - 2013-07-25 12:27 +0100
    Re: Is this effect possible with postscript ashley willis <"s/^.*/valid/&&print' address'"@hostscript.org> - 2013-07-26 02:28 +0000
      Re: Is this effect possible with postscript Herbert Voss <Herbert.Voss@alumni.tu-berlin.de> - 2013-07-26 19:42 +0200
        Re: Is this effect possible with postscript Cecil Westerhof <Cecil@decebal.nl> - 2013-07-28 16:32 +0200
      Re: Is this effect possible with postscript Cecil Westerhof <Cecil@decebal.nl> - 2013-07-28 16:30 +0200
      Re: Is this effect possible with postscript luser- -droog <mijoryx@yahoo.com> - 2013-07-31 01:40 -0700

#1503 — Is this effect possible with postscript

I like the effect of the red font on page 7 of:
    https://wiki.mozilla.org/images/9/93/LCA2012.pdf

Can this be done with postscript?

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

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#1504

Cecil Westerhof <Cecil@decebal.nl> writes:

> I like the effect of the red font on page 7 of:
>     https://wiki.mozilla.org/images/9/93/LCA2012.pdf
>
> Can this be done with postscript?

Not easily, I don't think. The saturation gradient is fairly easy, where
it's pinker at the top and redder at the bottom, and the outlining is
fairly easy too. The fuzzy edge of the drop shadows is probably harder,
though, I don't immediately see how I'd do blurring. And, the white
lines where the "light catches" aren't easy: given a font that permits
such analysis, I can imagine an algorithm that breaks the letter
outlines into many straight lines and processes those for angle, etc. to
add the white reflections (I do this kind of thing when I want to, say,
nestle letters perfectly right up against each other), but that takes a
fair few lines of non-trivial thought and coding to achieve.

Mark

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#1505

Mark Carroll <mtbc@bcs.org> writes:

> I don't immediately see how I'd do blurring

I suppose that for completeness I should mention that I can imagine some
scheme where a very pale version of the letter is drawn many times in a
larger circle, then a slightly darker one slightly further in, etc.,
ending with a grey one at the center of the shadow, but I have never
tried it: I don't know how it would look and how slowly it would go.
They may well be rather better ideas.

Mark

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#1506

In article <87ob9run40.fsf@Aspire.decebal.nl>, Cecil@decebal.nl says...
> 
> I like the effect of the red font on page 7 of:
>     https://wiki.mozilla.org/images/9/93/LCA2012.pdf
> 
> Can this be done with postscript?

Essentially yes, fairly easily.

The graphic you refer to is actually an image, so the font is a picture, 
not vector data.

The image is combined with a soft mask, which is transparency, and 
therefore not avilable in PostScript, but the mask appears to be 100% 
opaque (thus pointless, other than for slowing down processing and using 
more memory). Removing the SMask shows no visible differences.

So yes, you could embed that image in a PostScript program instead, and 
get the same result.


		Ken

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#1507

Op donderdag 25 jul 2013 10:49 CEST schreef ken@spamcop.net:

> In article <87ob9run40.fsf@Aspire.decebal.nl>, Cecil@decebal.nl
> says...
>>
>> I like the effect of the red font on page 7 of:
>> https://wiki.mozilla.org/images/9/93/LCA2012.pdf
>>
>> Can this be done with postscript?
>
> Essentially yes, fairly easily.
>
> The graphic you refer to is actually an image, so the font is a
> picture, not vector data.
>
> The image is combined with a soft mask, which is transparency, and
> therefore not avilable in PostScript, but the mask appears to be
> 100% opaque (thus pointless, other than for slowing down processing
> and using more memory). Removing the SMask shows no visible
> differences.
>
> So yes, you could embed that image in a PostScript program instead,
> and get the same result.

Well, I meant using a font, not using an image. I would like to use my
own words. ;-)

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

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#1508

In article <87hafjuesk.fsf@Aspire.decebal.nl>, Cecil@decebal.nl says...

> Well, I meant using a font, not using an image. I would like to use my
> own words. ;-)

Then, the answer is no, not really, for a numebr of reasons, one of 
which is transparency. But then I don't tbink you could easily achieve 
the effect in PDF either.


		Ken

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#1510

On Thu, 25 Jul 2013, Cecil Westerhof wrote:

> I like the effect of the red font on page 7 of:
>    https://wiki.mozilla.org/images/9/93/LCA2012.pdf
>
> Can this be done with postscript?

i am going to say yes, but it would not be easy. this looks like a font 
that has been bumped up to 3d with rounded edges and then a lighting 
effect applied. i've done some 3d stuff in postscript, even a basic 
lighting effect, which can be seen in the below video, but doing to a font 
what i describe would be a lot more work still.

http://www.youtube.com/watch?v=cL9RXpC7MUY

-ashley

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#1511

Am 26.07.2013 04:28, schrieb ashley willis:
>
> On Thu, 25 Jul 2013, Cecil Westerhof wrote:
>
>> I like the effect of the red font on page 7 of:
>>    https://wiki.mozilla.org/images/9/93/LCA2012.pdf
>>
>> Can this be done with postscript?
>
> i am going to say yes, but it would not be easy. this looks like a font
> that has been bumped up to 3d with rounded edges and then a lighting
> effect applied. i've done some 3d stuff in postscript, even a basic
> lighting effect, which can be seen in the below video, but doing to a
> font what i describe would be a lot more work still.

see 
http://mirrors.ctan.org/graphics/pstricks/contrib/pst-light3d/pst-light3d-doc.pdf

The PS code is also available.

Herbert

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#1514

Op vrijdag 26 jul 2013 19:42 CEST schreef Herbert Voss:

> Am 26.07.2013 04:28, schrieb ashley willis:
>>
>> On Thu, 25 Jul 2013, Cecil Westerhof wrote:
>>
>>> I like the effect of the red font on page 7 of:
>>> https://wiki.mozilla.org/images/9/93/LCA2012.pdf
>>>
>>> Can this be done with postscript?
>>
>> i am going to say yes, but it would not be easy. this looks like a
>> font that has been bumped up to 3d with rounded edges and then a
>> lighting effect applied. i've done some 3d stuff in postscript,
>> even a basic lighting effect, which can be seen in the below video,
>> but doing to a font what i describe would be a lot more work still.
>
> see
> http://mirrors.ctan.org/graphics/pstricks/contrib/pst-light3d/pst-light3d-doc.pdf

Looks very usable. I am going to study that. Thanks.

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

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#1515

Op vrijdag 26 jul 2013 04:28 CEST schreef ashley willis:

>
> On Thu, 25 Jul 2013, Cecil Westerhof wrote:
>
>> I like the effect of the red font on page 7 of:
>> https://wiki.mozilla.org/images/9/93/LCA2012.pdf
>>
>> Can this be done with postscript?
>
> i am going to say yes, but it would not be easy. this looks like a
> font that has been bumped up to 3d with rounded edges and then a
> lighting effect applied. i've done some 3d stuff in postscript, even
> a basic lighting effect, which can be seen in the below video, but
> doing to a font what i describe would be a lot more work still.
>
> http://www.youtube.com/watch?v=cL9RXpC7MUY

I find that very interesting. How did you do that?

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

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#1536

On Thursday, July 25, 2013 9:28:52 PM UTC-5, ashley willis wrote:
> On Thu, 25 Jul 2013, Cecil Westerhof wrote:
> 
> 
> 
> > I like the effect of the red font on page 7 of:
> 
> >    https://wiki.mozilla.org/images/9/93/LCA2012.pdf
> 
> >
> 
> > Can this be done with postscript?
> 
> 
> 
> i am going to say yes, but it would not be easy. this looks like a font 
> 
> that has been bumped up to 3d with rounded edges and then a lighting 
> 
> effect applied. i've done some 3d stuff in postscript, even a basic 
> 
> lighting effect, which can be seen in the below video, but doing to a font 
> 
> what i describe would be a lot more work still.
> 
> 
> 
> http://www.youtube.com/watch?v=cL9RXpC7MUY
> 
> 
> 
> -ashley

Yes. I agree it would be possible, but possibly very
difficult.

I'd start by taking the charpath.
If it's a stroked font (rare) do a strokepath.

Then I'd dump the path back into postscript and do a
triangulation of the polygons (Wikipedia). 

Then you add a third dimension to the coordinates and 
raise the Z on interior points. That would give you a 
3d-mesh to which you can apply lighting effects.

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