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arctica · Joined: 10 Sep 2006 Posts: 146 Location: United Kingdom

Hello

I have tested the %eq option with a simplified test below:

PaulLaidler · Posted: Mon Feb 10, 2025 5:35 pm Post subject:

Lester

I don't think that you can do much to improve the outcome. %eq is somewhat limited and I get the impression that it is not often used.

There may be some improvement obtained by using a different font such as

PaulLaidler · Posted: Tue Feb 11, 2025 7:48 am Post subject:

Lester

I have done a preliminary investigation with two conclusions:

1) At the moment the font cannot be preset as I suggested above. We could fix this.

2) We could fix the position of the divide line in order to allow for the subscripts.

I will add this to the task list but I am doubtful about the result being what you would like.

Kenneth_Smith · Posted: Tue Feb 11, 2025 11:25 am Post subject:

Lester,

Here is my approach.

https://www.dropbox.com/scl/fi/j0jx471yw04u6ozv95e1c/Equation.zip?rlkey=qe2j2yodnm264yy002fgvddea&st=l69lb1x9&dl=0

arctica · Joined: 10 Sep 2006 Posts: 146 Location: United Kingdom

Thanks for the pointers.

Does Clearwin accept SVG files as input?

Lester

PaulLaidler · Posted: Tue Feb 11, 2025 1:02 pm Post subject:

SVG files can be opened and drawn to a "drawing surface" such as that generated via %gr.

See FTN95.chm and search for SVG.

It is under ClearWin+, then Graphics, then Scalable vector graphics.

arctica · Joined: 10 Sep 2006 Posts: 146 Location: United Kingdom

Thanks for the info Paul.

Shame Clearwin cannot read Inkscape SVG files directly; the structure is slightly different.

LitusSaxonicum · Posted: Wed Feb 12, 2025 5:30 pm Post subject:

I had a look at Ken�s example, and there isn�t a need to �print� to PDF, you can capture the screen image with shift-PrintScreen, the paste into Paint and select and cut the bits you want.

Pasting an image file, defined in the Resources section of a program is great if there�s a convenient area to paste it into, say for the legend of a graph axis. In that case you can keep the space for it clear. It isn�t so good if you overlay it on part of a drawing as the white space around the characters obscures what is beneath. In such a case it is a real pity that %eq isn�t better. If it is a regularly repeated display of an equation, you can use something more sophisticated than Paint to make it an icon or a GIF that has transparency. If it is a �one-off�, then the whole rigmarole of making an image file isn�t really appropriate, and similarly if the equation itself has to be scaled.

There is nothing to stop you creating your equation yourself with multiple �passes' for numerator, denominator, subscripts and superscripts etc, but again, a really nice%eq would make that a lot easier.

Incidentally, whatever happened to the Hershey fonts that FTN77 used to have as part of its graphics support?

PaulLaidler · Posted: Thu Feb 13, 2025 7:34 am Post subject:

It looks like DRAW_HERSHEY@ is exported by salflibc.dll for Win32 but I don't think that I have ever tested it. I presume that the font must be included in the DLL as a resource in order for it to work.

__win_draw_hershey is exported by Clearwin64.dll for x64 but this is just a place holder for possible future development.

If there is a real chance that these functions might be useful then I can investigate further.

LitusSaxonicum · Posted: Thu Feb 13, 2025 12:38 pm Post subject:

Hi Paul,

Probably not worth investigating, as it is my interest in archaeology!

Interesting though.

Eddie

PaulLaidler · Posted: Wed May 14, 2025 11:08 am Post subject:

A new option %eq[local_font] has been added and some improvements to the display for %eq have been made for the next release of ClearWin+.

%eq[local_font] will use the current %fn and %ts instead of the default "Times New Roman" with a text size of 2.0.

The improvements provide a reasonable layout of the symbols for this particular equation.

%eq continues to be of limited usefulness and alternatives such as %im are recommended.

DanRRight · Posted: Thu May 15, 2025 7:00 pm Post subject:

Before %eq was working but the results were looking like a disaster. No greek math symbols. Hopefully new local font option will handle that

PaulLaidler · Posted: Fri May 16, 2025 6:43 am Post subject:

Hopefully you will see some improvement but although you will be able to use Greek symbols, you will not be able to use both Greek and Roman symbols.

Maybe that could be fixed but I am not sure that it is worth spending much time on this.

PaulLaidler · Posted: Sat May 17, 2025 11:15 am Post subject:

It turns out that a number of Greek symbols are already provided as for example {alpha}, {beta}, {gamma}, {delta}, {epsilon}, {phi}, {pi}, {psi}, {zeta}, ... Please see the help file for details.

DanRRight · Posted: Tue May 20, 2025 1:04 am Post subject:

Of course this is not of a big concern from the users, but users will come and their priorities may change. Compared to making this compiler more competitive with other Fortran compilers this is minor issue. But if by some reason extending this functionality takes little time who knows may be it is worth to add more sophisticated equation writer.

Currently the HTML based equations on the web finally look good and all browsers support this extension. The FTN77/90/95/Clearwin was supporting some HTML (I even tried to use this for making Help file decades ago). The supported HTML commands were limited at that time and looks like no further development was done after that.

Is it possible to broaden HTML support by linking some open source HTML libraries to FTN95/Clearwin ? Same like 30 years ago was added to this compiler OpenGL and it works with not a single complaint. Or like some other computers added support for external WInAPI, MPI and OpenMP etc ?

If Clearwin ever planned to be rewritten based on HTML/Java so that its windows can be easily resized, posted on the web and controlled from it may be this equation writing would be just the part of this infrastructure, though all the above were probably my crazy dreams