Skeudenn:Go .png - Wikipedia

# Skeudenn:Go .png

### Diwar Wikipedia, an holloueziadur digor

- Skeudenn
- Istor ar skeudenn
- Liammoù war-du ar skeudenn

Go_.png‎ (1Ko, seurt MIME: `image/png`)

This file is a shared upload and may be used by other projects.

A tile for constructing Go positions.

This tile is one of a set. An example Go board layout, using all of the images:

There are also versions with red circles, for pointing out particular spots on the board, and stones with numbers:

## [edit] Sourcecode

To reproduce these images, save the following Metapost program as Go_template.mp:

     scale=0.6in;   % scale is the diameter of a stone
     linethickness = scale/25;
     pickup pencircle scaled linethickness;
     num = 500;  % Levels of shading in each stone.

     lx = -0.35;
     ly = 0.35;
     lz = sqrt(1-lx*lx-ly*ly);
       % light source direction vector.
       % note that lz = cos(ltip).
     ltheta = angle(lx, ly);
     ltip = angle(lz, lx++ly);
       % the angle at which the light source is tipped.

     path ellipse;
     ellipse := fullcircle scaled scale xscaled lz;

     color boardcolor;
     boardcolor = (0.86,0.70,0.36);

     % Draw a black and a white stone:
     picture blackstone;
     blackstone = currentpicture;
     addto blackstone contour fullcircle scaled scale;

     picture whitestone;
     whitestone = currentpicture;
     basewhite = 0.7;
     addto whitestone contour fullcircle scaled scale
        withcolor (basewhite*white);

     for ratio = 1 step -1/num until 0 :
       path ourellipse;
       ourellipse = ellipse scaled ratio
         shifted (scale*(1+-+ratio)*sind(ltip)/2, 0)
         rotated ltheta;

       addto blackstone contour ourellipse withcolor (0.7*(1+-+ratio)**2*white);
       addto whitestone contour ourellipse withcolor
         (basewhite + (1-basewhite)*((1+-+ratio)**4))*white;
     endfor;

     def foo(expr fig) =
      beginfig(fig);
       pickup pencircle scaled linethickness;
       fill unitsquare scaled scale shifted (-0.5scale,-0.5scale)
         withcolor boardcolor;
       linecap := butt;
       bar;
      endfig;
      beginfig(fig+1);
       pickup pencircle scaled linethickness;
       fill unitsquare scaled scale shifted (-0.5scale,-0.5scale)
         withcolor boardcolor;
       linecap := butt;
       bar;
       pickup pencircle scaled (2*linethickness);
       draw fullcircle scaled (scale/2) withcolor red;
      endfig;
     enddef;

     def bar =
      draw (0,-0.5scale)--(0,0)--(0.5scale,0);
     enddef;
     foo(1);

     def bar =
       draw (-0.5scale,0)--(0.5scale,0);
       draw (0,-0.5scale)--(0,0);
     enddef;
     foo(3);

     def bar =
       draw (-0.5scale,0)--(0,0)--(0,-0.5scale);
     enddef;
     foo(5);

     def bar =
       draw (0,0.5scale)--(0,-0.5scale);
       draw (-0.5scale,0)--(0,0);
     enddef;
     foo(7);

     def bar =
       draw (0,0.5scale)--(0,0)--(-0.5scale,0);
     enddef;
     foo(9);

     def bar =
       draw (0.5scale,0)--(-0.5scale,0);
       draw (0,0.5scale)--(0,0);
     enddef;
     foo(11);

     def bar =
       draw (0.5scale,0)--(0,0)--(0,0.5scale);
     enddef;
     foo(13);

     def bar =
       draw (0,-0.5scale)--(0,0.5scale);
       draw (0.5scale,0)--(0,0);
     enddef;
     foo(15);

     def bar =
       draw (-0.5scale,0)--(0.5scale,0);
       draw (0,-0.5scale)--(0,0.5scale);
     enddef;
     foo(17);

     def bar =
       draw (-0.5scale,0)--(0.5scale,0);
       draw (0,-0.5scale)--(0,0.5scale);
       pickup pencircle scaled (2*linethickness);
       draw (0,0);
     enddef;
     foo(19);

     beginfig(21);
       fill unitsquare scaled scale shifted (-0.5scale,-0.5scale)
         withcolor boardcolor;
       draw blackstone;
     endfig;

     beginfig(22);
       fill unitsquare scaled scale shifted (-0.5scale,-0.5scale)
         withcolor boardcolor;
       draw whitestone;
     endfig;

     beginfig(23);
       fill unitsquare scaled scale shifted (-0.5scale,-0.5scale)
         withcolor boardcolor;
       draw blackstone;
       draw thelabel("1", (0,0)) scaled (0.75*scale/10pt)
         withcolor white;
     endfig;

     beginfig(24);
       fill unitsquare scaled scale shifted (-0.5scale,-0.5scale)
         withcolor boardcolor;
       draw whitestone;
       draw thelabel("2", (0,0)) scaled (0.75*scale/10pt)
         withcolor black;
     endfig;

    end;

and save the following as Go_template.tex:

    \documentclass[10pt]{article}
     \usepackage{graphicx}
     \pagestyle{empty}
    \begin{document}
     \includegraphics{\fig}
    \end{document}

Then run

    mpost Go_template
    for num in 23 24; do
      latex "\def\fig{Go_template.$num} \input Go_template";
      dvips -mode lwpro -D 800 Go_template.dvi -o Go_template.ps.$num;
      mv -f Go_template.ps.$num Go_template.$num;
    done
    for name in Go_template.{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24}; do
      convert -density 800 $name $name.pnm;
      pnmcrop $name.pnm | pnmtopng > $name.png.uncrush;
      pngcrush -reduce -brute -l 9 $name.png.uncrush $name.png;
      rm -f $name $name.{pnm,png.uncrush};
    done

David Benbennick made these images Friday, February 25, 2005.

I, the author of this work, hereby publish it under the following licenses:

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".

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## Liammoù war-du ar skeudenn

Ul liamm war-du ar skeudenn-mañ zo war ar pajennoù a-is :

- Go (c'hoari)
- Patrom:Goban

Adtapet diwar "http://br.wikipedia.org../../../g/o/_/Skeudenn%7EGo_.png_c942.html"

##### Views

- Skeudenn
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- Stumm a-vremañ pe stumm red

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