qwtplot3d-interest

Qwtplot3d and Gl2ps

[Gudjon I. G. <gu...@mc...>]

Hi
   My name is Gudjon and I have made a Debian package out of QwtPlot3d that=
 is=20
already in the distribution.
   It is great that the work on the library will resume, I look forward to=
=20
that but I have a question.
   I dislike having 3dparty libraries within packages since Debian has the=
=20
dependency framework that lets one package install another. Gl2ps in=20
QwtPlot3d is also an old version of the library. I tried to compile QwtPlot=
3d=20
against the new version and got the following result:
src/qwt3d_io_gl2ps.cpp:377: error: cannot convert =E2=80=98GLfloat*=E2=80=
=99 to =E2=80=98GLfloat=E2=80=99 for=20
argument =E2=80=985=E2=80=99 to =E2=80=98GLint gl2psTextOpt(const char*, co=
nst char*, GLshort, GLint,=20
GLfloat)=E2=80=99
The last argument has changed to angle in the gl2ps library. So with this u=
gly=20
change the new library works.
diff src/qwt3d_io_gl2ps.cpp.org src/qwt3d_io_gl2ps.cpp
377c377,378
<       ret =3D gl2psTextOpt(str, fontname, (int)fontsize, a, 0);
=2D--
>       //ret =3D gl2psTextOpt(str, fontname, (int)fontsize, a, rgba2);
>       ret =3D gl2psTextOpt(str, fontname, (int)fontsize, a, 0);//rgba2);

Has anyone fixed this in a more beautiful way?

Regards
Gudjon

Re: Qwtplot3d and Gl2ps

[Micha B. <kri...@us...>]

Monday, May 7, 2007, 10:03:27, Gudjon I. Gudjonsson wrote:

>    I dislike having 3dparty libraries within packages since Debian has the
> dependency framework that lets one package install another.

One of the policies of qwt3d was/is self-containment. I always liked
the idea of dropping in source code into my projects instantly, so the
library was designed with a single dependency (Qt) in mind. Even gl2ps
himself follows this strategy and so it became part of the qwt3d source
tree (the gl2ps license (http://www.geuz.org/gl2ps/COPYING.GL2PS)
allows static linking).

> Gl2ps in QwtPlot3d is also an old version of the library.
[...]
> Has anyone fixed this in a more beautiful way?

My proposal for the moment is a patch release 0.2.6.1 (or 0.2.7),
updating the included gl2ps to the recent release (I used this rather
ad-hoc procedure during the past a few times).

Would this be helpful?

Micha  
-- 

Re: Qwtplot3d and Gl2ps

[Gerard V. <ger...@gr...>]

On Mon, 7 May 2007 11:38:35 +0200
Micha Bieber <kri...@us...> wrote:

> Monday, May 7, 2007, 10:03:27, Gudjon I. Gudjonsson wrote:
> 
> >    I dislike having 3dparty libraries within packages since Debian
> > has the dependency framework that lets one package install another.
> 
> One of the policies of qwt3d was/is self-containment. I always liked
> the idea of dropping in source code into my projects instantly, so the
> library was designed with a single dependency (Qt) in mind. Even gl2ps
> himself follows this strategy and so it became part of the qwt3d
> source tree (the gl2ps license
> (http://www.geuz.org/gl2ps/COPYING.GL2PS) allows static linking).
> 
> > Gl2ps in QwtPlot3d is also an old version of the library.
> [...]
> > Has anyone fixed this in a more beautiful way?
> 
> My proposal for the moment is a patch release 0.2.6.1 (or 0.2.7),
> updating the included gl2ps to the recent release (I used this rather
> ad-hoc procedure during the past a few times).
>
Micha,

I have 2 problems with respect to pdf output:

1. it looks as if the pdf output is mirrored with respect to the
    computer screen (depth?). See the attached files: the png file
    looks fine contrary to the pdf file.

2. the above files have been generated with Qt-3.  I am getting
    crashes and X-server messages when using Qt-4.

Note: the problems occur at least on several Linux systems with
QwtPlot3D wrapped by PyQwt3D.  This may be the reason for the second
problem, but IMO not for the first.

Gerard

Re: Qwtplot3d and Gl2ps

[Micha B. <kri...@us...>]

Monday, May 7, 2007, 12:18:00, Gerard Vermeulen wrote:

> I have 2 problems with respect to pdf output:

> 1. it looks as if the pdf output is mirrored with respect to the
>     computer screen (depth?). See the attached files: the png file
>     looks fine contrary to the pdf file.

It's of course a feature :-). The VectorWriter classes 'AUTO' mode
(default) rotates the output for aspect ratio's with width > height.
This can be turned off with VectorWriter::setLandscape(OFF). The idea
behind the default behavior should select the IMO most probable case for
printed output.

> 2. the above files have been generated with Qt-3.  I am getting
>     crashes and X-server messages when using Qt-4.

Have still to test it on Linux, but todays snapshot of QtWin 4.3 (commercial
- no X-Server of course) works well here.

Micha  
-- 

Re: Qwtplot3d and Gl2ps

[Micha B. <kri...@us...>]

> <       ret = gl2psTextOpt(str, fontname, (int)fontsize, a, 0);

gl2ps 1.3.2 has been included and fixed the problem. Note however, that
the current order schemes of gl2ps (all of them - btree and normal) seem
to slow down the rendering speed horribly. I'll check this.

Micha  
-- 

Re: Qwtplot3d and Gl2ps

[Gerard V. <ger...@gr...>]

On Sun, 20 May 2007 01:09:56 +0200
Micha Bieber <kri...@us...> wrote:

> > <       ret = gl2psTextOpt(str, fontname, (int)fontsize, a, 0);
> 
> gl2ps 1.3.2 has been included and fixed the problem. Note however,
> that the current order schemes of gl2ps (all of them - btree and
> normal) seem to slow down the rendering speed horribly. I'll check
> this.

I noticed that gl2ps compiled with MinGW is much much (it feels
like a factor 10) slower on Windows than on Linux or Mac OS X.
In fact, I see no reason not to choose highest quality on Linux or
Mac OS X.

Gerard