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version 1.9, 2002/08/13 07:44:06

version 1.14, 2003/04/20 08:01:26

Line 1

@comment $OpenXM: OpenXM/src/asir-doc/parts/process.texi,v 1.8 2002/07/10 09:33:52 noro Exp $

@comment $OpenXM: OpenXM/src/asir-doc/parts/process.texi,v 1.13 2003/04/19 15:44:56 noro Exp $

\BJP

@node $BJ,;67W;;(B,,, Top

@chapter $BJ,;67W;;(B

Line 28

@section OpenXM

\BJP

@b{Asir} $B$O(B, $BJ,;67W;;$K$*$1$kDL?.%W%m%H%3%k$H$7$F(B, @b{OpenXM}

@b{Asir} $B$O(B, $BJ,;67W;;$K$*$1$kDL?.%W%m%H%3%k$H$7$F(B,

@b{OpenXM}

(Open message eXchange for Mathematics) $B%W%m%H%3%k$r:NMQ$7$F$$$k(B.

@b{OpenXM} $B%W%m%8%'%/%H$K$D$$$F$O(B,

@ifhtml

@end ifhtml

@code{http://www.math.sci.kobe-u.ac.jp/OpenXM/}

@ifhtml

</A>

@end ifhtml

$B$r;2>H$7$F$[$7$$(B.

@b{OpenXM} $B%W%m%H%3%k$O(B, $B<g$H$7$F?t3X%*%V%8%'%/%H$r%W%m%;%94V$G$d$j$H$j$9$k(B

$B$?$a$N5,Ls$G$"$k(B. @b{OpenXM} $B$K$*$$$F$O(B

Line 38 On @b{Asir} distributed computations are done under @b

Line 49 On @b{Asir} distributed computations are done under @b

(Open message eXchange protocol for Mathematics), which

is a protocol for exchanging mainly mathematical objects

between processes.

See

@ifhtml

@end ifhtml

@code{http://www.math.sci.kobe-u.ac.jp/OpenXM/}

@ifhtml

</A>

@end ifhtml

for the details of @b{OpenXM}.

In @b{OpenXM} a distributed computation is done as follows:

Line 505 input @code{quit}.

Line 525 input @code{quit}.

* ox_flush::

* ox_get_serverinfo::

* generate_port try_bind_listen try_connect try_accept register_server::

* ifplot conplot plot plotover::

* ifplot conplot plot polarplot plotover::

* open_canvas clear_canvas draw_obj draw_string::

@end menu

Line 533 input @code{quit}.

Line 553 input @code{quit}.

@item host

\JP $BJ8;zNs$^$?$O(B 0

\EG string or 0

@item dir, command

@item dir command

\JP $BJ8;zNs(B

\EG string

@item id

Line 779 ox_xterm*saveLines:1000

Line 799 ox_xterm*saveLines:1000

\EG @item References

@fref{ox_rpc ox_cmo_rpc ox_execute_string},

@fref{ox_pop_cmo ox_pop_local},

@fref{ifplot conplot plot plotover}

@fref{ifplot conplot plot polarplot plotover}

@end table

\JP @node ox_launch_generic,,, $BJ,;67W;;$K4X$9$k4X?t(B

Line 800 ox_xterm*saveLines:1000

Line 820 ox_xterm*saveLines:1000

@item host

\JP $BJ8;zNs$^$?$O(B 0

\EG string or 0

@item launcher, server

@item launcher server

\JP $BJ8;zNs(B

\EG string

@item use_unix, use_ssh, use_x, conn_to_serv

@item use_unix use_ssh use_x conn_to_serv

\JP $B@0?t(B

\EG integer

@end table

Line 948 the client executes @code{connect}.

Line 968 the client executes @code{connect}.

@item host

\JP $BJ8;zNs(B

\EG string

@item port,control_port,server_port

@item port control_port server_port

\JP $B@0?t$^$?$OJ8;zNs(B

\EG integer or string

@item socket,control_socket,server_socket

@item socket control_socket server_socket

\JP $B@0?t(B

\EG integer

@end table

Line 1085 If X environment is not available or is not necessary,

Line 1105 If X environment is not available or is not necessary,

@end example

@example

[5] ox_launch_nox("127.0.0.1","/usr/local/lib/asir","/usr/local/lib/asir/ox_asir");

[5] ox_launch_nox("127.0.0.1","/usr/local/lib/asir",

"/usr/local/lib/asir/ox_asir");

@end example

Line 1093 If X environment is not available or is not necessary,

Line 1114 If X environment is not available or is not necessary,

[7] RemoteLibDir = "/usr/local/lib/asir/"$

[8] Machines = ["sumire","rokkaku","genkotsu","shinpuku"];

[sumire,rokkaku,genkotsu,shinpuku]

[9] Servers = map(ox_launch,Machines,RemoteLibDir,RemoteLibDir+"ox_asir");

[9] Servers = map(ox_launch,Machines,RemoteLibDir,

RemoteLibDir+"ox_asir");

[0,1,2,3]

@end example

Line 1130 If X environment is not available or is not necessary,

Line 1152 If X environment is not available or is not necessary,

@item command

\JP $BJ8;zNs(B

\EG string

@item arg0, arg1, ...

@item arg0 ...

\JP $BG$0U(B ($B0z?t(B)

\EG arbitrary (arguments)

@end table

Line 1260 The result is pushed to the stack.

Line 1282 The result is pushed to the stack.

@item

@code{register_handler()} $B$O(B, @kbd{C-c} $B$J$I$K$h$k3d$j9~$_$N:]$K(B,

@kbd{u} $B$r;XDj$9$k$3$H$G(B, $BL50z?t%f!<%6Dj5A4X?t(B @var{func()} $B$,8F$S=P$5$l$k(B

@kbd{u} $B$r;XDj$9$k$3$H$G(B, $BL50z?t%f!<%6Dj5A4X?t(B @var{func}() $B$,8F$S=P$5$l$k(B

$B$h$&$K@_Dj$9$k(B. $B$3$N4X?t$K(B, @code{ox_reset()} $B$r8F$S=P$5$;$k$3$H$G(B,

$B3d$j9~$_$N:]$K<+F0E*$K(B @b{OpenXM} server $B$N%j%;%C%H$r9T$&$3$H$,$G$-$k(B.

Line 1291 specified in @b{OpenXM}. @samp{ox_asir} immediately en

Line 1313 specified in @b{OpenXM}. @samp{ox_asir} immediately en

mode and pops up an window to input debug commands on X window system.

@item

@code{register_handler()} registers a function @var{func()}.

@code{register_handler()} registers a function @var{func}().

If @kbd{u} is specified on a keybord interrupt, @var{func()}

If @kbd{u} is specified on a keybord interrupt, @var{func}()

is executed before returning the toplevel.

If @code{ox_reset()} calls are included in @var{func()},

If @code{ox_reset()} calls are included in @var{func}(),

one can automatically reset @b{OpenXM} servers on a keyboard interrupt.

@item

Line 1594 is realized as combinations of @code{ox_push_cmd} and

Line 1616 is realized as combinations of @code{ox_push_cmd} and

@findex ox_pops

@table @t

@item ox_pops(@var{number}[,@var{nitem})

@item ox_pops(@var{number}[,@var{nitem}])

\JP :: $B%W%m%;%9<1JL;R(B @var{number} $B$N%W%m%;%9$N%9%?%C%/$+$i%G!<%?$r<h$j=|$/(B.

\EG :: Removes data form the stack of a process whose identifier is @var{number}.

@end table

Line 1839 Mathcap $B$r%j%9%H$H$7$FJV$9(B.

Line 1861 Mathcap $B$r%j%9%H$H$7$FJV$9(B.

\BEG

@item If @var{id} is specified, the mathcap of the process whose

identifier is @var{id} is returned.

@item If @var{id} is not specified, the list of @var{[id,Mathcap]}

@item If @var{id} is not specified, the list of [@var{id},@var{Mathcap}]

is returned, where @var{id} is the identifier of a currently active process,

and @var{Mathcap} is the mathcap of the process.

identifier @var{id} is returned.

Line 1850 identifier @var{id} is returned.

Line 1872 identifier @var{id} is returned.

[343] ox_get_serverinfo(0);

[[199909080,Ox_system=ox_sm1.plain,Version=2.991118,HOSTTYPE=FreeBSD],

[262,263,264,265,266,268,269,272,273,275,276],

[[514],[2130706434,1,2,4,5,17,19,20,22,23,24,25,26,30,31,60,61,27,33,40,16,34]]]

[[514],[2130706434,1,2,4,5,17,19,20,22,23,24,25,26,30,31,60,61,27,

33,40,16,34]]]

[344] ox_get_serverinfo();

[[0,[[199909080,Ox_system=ox_sm1.plain,Version=2.991118,HOSTTYPE=FreeBSD],

[[0,[[199909080,Ox_system=ox_sm1.plain,Version=2.991118,

HOSTTYPE=FreeBSD],

[262,263,264,265,266,268,269,272,273,275,276],

[[514],[2130706434,1,2,4,5,17,19,20,22,23,24,25,26,30,31,60,61,27,33,40,16,34]]]],

[[514],[2130706434,1,2,4,5,17,19,20,22,23,24,25,26,30,31,60,61,27,33,

40,16,34]]]],

[1,[[199901160,ox_asir],

[276,275,258,262,263,266,267,268,274,269,272,265,264,273,300,270,271],

[[514,2144202544],

[1,2,3,4,5,2130706433,2130706434,17,19,20,21,22,24,25,26,31,27,33,60],[0,1]]]]]

[1,2,3,4,5,2130706433,2130706434,17,19,20,21,22,24,25,26,31,27,33,60],

[0,1]]]]]

@end example

@table @t

Line 1867 identifier @var{id} is returned.

Line 1893 identifier @var{id} is returned.

@fref{Mathcap}.

@end table

\JP @node ifplot conplot plot plotover,,, $BJ,;67W;;$K4X$9$k4X?t(B

\JP @node ifplot conplot plot polarplot plotover,,, $BJ,;67W;;$K4X$9$k4X?t(B

\EG @node ifplot conplot plot plotover,,, Functions for distributed computation

\EG @node ifplot conplot plot polarplot plotover,,, Functions for distributed computation

@subsection @code{ifplot}, @code{conplot}, @code{plot}, @code{plotover}

@subsection @code{ifplot}, @code{conplot}, @code{plot}, @code{polarplot}, @code{plotover}

@findex ifplot

@findex conplot

@findex polarplot

@findex plot

@findex plotover

Line 1885 identifier @var{id} is returned.

Line 1912 identifier @var{id} is returned.

@item plot(@var{func} [,@var{geometry}] [,@var{xrange}] [,@var{id}] [,@var{name}])

\JP :: 1 $BJQ?t4X?t$N%0%i%U$rI=<($9$k(B.

\EG :: Displays the graph of a univariate function.

@item polarplot(@var{func} [,@var{geometry}] [,@var{thetarange}] [,@var{id}] [,@var{name}])

\JP :: $B6K7A<0$GM?$($i$l$?6J@~$rI=<($9$k(B.

\EG :: Displays the graph of a curve given in polar form.

@item plotover(@var{func},@var{id},@var{number})

\JP :: $B$9$G$KB8:_$7$F$$$k%&%#%s%I%&$XIA2h$9$k(B.

\EG Plots on the existing window real zeros of a bivariate function.

Line 1897 identifier @var{id} is returned.

Line 1927 identifier @var{id} is returned.

@item func

\JP $BB?9`<0(B

\EG polynomial

@item geometry, xrange, yrange, zrange

@item geometry xrange yrange zrange

\JP $B%j%9%H(B

\EG list

@item id, number

@item id number

\JP $B@0?t(B

\EG integer

@item name

Line 1913 identifier @var{id} is returned.

Line 1943 identifier @var{id} is returned.

@item

@code{ifplot()} $B$O(B, 2 $BJQ?t4X?t(B @var{func} $B$N<B?t>e$G$NNmE@$N(B

$B%0%i%U$NI=<($r9T$&(B. @code{conplot()} $B$O(B, $BF1MM$N0z?t$KBP$7(B,

$BEy9b@~$NI=<($r9T$&(B. @code{plot()} $B$O(B 1 $BJQ?t4X?t$N(B

$BEy9b@~$NI=<($r9T$&(B.

$B%0%i%U$NI=<($r9T$&(B.

@code{plot()} $B$O(B 1 $BJQ?t4X?t$N%0%i%U$NI=<($r9T$&(B.

@code{polarplot()} $B$O(B $B6K7A<0(B @var{r}=@var{f}(@var{theta}) $B$GI=$5$l$?6J@~$N%0%i%U$NI=<($r9T$&(B.

@item

$B$3$l$i$O(B OpenXM $B%5!<%P$H$7$F<B8=$5$l$F$$$k(B. UNIX $B>e$G$O(B

@samp{ox_plot} $B$,(B, Windows $B>e$G$O(B @samp{engine} $B$,$3$l$i$N5!G=(B

$B$rDs6!$7$F$*$j(B, $B$3$l$i$O(B @b{Asir} $B$NI8=`%i%$%V%i%j%G%#%l%/%H%j$K$"$k(B.

$B$3$l$i$O(B @code{ox_launch()} $B$^$?$O(B @code{ox_launch_nox()}

$B%"%/%F%#%V$J(B @samp{ox_plot} $B$N(B id $B$,(B @var{id} $B$H$7$F;XDj$5$l$?>l9g(B,

$B$K$h$j5/F0$7$F$*$/I,MW$,$"$k(B.

$B$=$N%5!<%P$,MQ$$$i$l$k(B. id $B$N;XDj$,$J$$>l9g$K$O(B, $B5/F0$5$l$F(B

$B$$$k%5!<%P$N$&$A(B, @samp{ox_plot} $B$,$"$l$P$=$N%5!<%P$,MQ$$$i$l$k(B.

@samp{ox_plot} $B$,5/F0$5$l$F$$$J$$>l9g$K$O(B,

@code{ox_launch_nox()} $B$,<+F0E*$K<B9T$5$l$F(B, @samp{ox_plot} $B$,(B

$BN)$A>e$,$j(B, $B$=$l$,MQ$$$i$l$k(B.

@item

$B0z?t$NFb(B, @var{func} $B$OI,?\$G$"$k(B. $B$=$NB>$N0z?t$O%*%W%7%g%s$G$"$k(B.

Line 1929 identifier @var{id} is returned.

Line 1964 identifier @var{id} is returned.

@table @var

@item geometry

$B%&%#%s%I%&$N%5%$%:$r%I%C%HC10L$G(B @var{[x,y]} $B$G;XDj$9$k(B.

$B%&%#%s%I%&$N%5%$%:$r%I%C%HC10L$G(B [@var{x},@var{y}] $B$G;XDj$9$k(B.

(@var{[}@code{300},@code{300}@var{]}. )

([@code{300},@code{300}]. )

@item xrange, yrange

@item xrange yrange

$BJQ?t$NHO0O$N;XDj$G(B, @var{[v,vmin,vmax]} $B$G;XDj$9$k(B.

$BJQ?t$NHO0O$N;XDj$G(B, [@var{v},@var{vmin},@var{vmax}] $B$G;XDj$9$k(B.

($B$$$:$l$NJQ?t$b(B @var{[v},@code{-2},@code{2}@var{]}.)

($B$$$:$l$NJQ?t$b(B [@var{v},@code{-2},@code{2}].)

$B$3$N;XDj$,$J$$>l9g(B, @var{func} $B$K4^$^$l$kJQ?t$NFbJQ?t=g=x$N>e$NJQ?t(B

$B$,(B @samp{x}, $B2<$NJQ?t$,(B @samp{y} $B$H$7$F07$o$l$k(B. $B$3$l$rHr$1$k$?$a$K$O(B

@var{xrange}, @var{yrange} $B$r;XDj$9$k(B. $B$^$?(B, @var{func} $B$,(B 1 $BJQ?t$N(B

Line 1942 identifier @var{id} is returned.

Line 1977 identifier @var{id} is returned.

@item zrange

@code{conplot()} $B$N>l9g$N$_;XDj$G$-$k(B. $B7A<0$O(B

@var{[v,vmin,vmax} @code{[},@var{step} @code{]}@var{]} $B$G(B, @var{step} $B$,;XDj$5$l(B

[@var{v},@var{vmin},@var{vmax} @code{[},@var{step} @code{]}] $B$G(B, @var{step} $B$,;XDj$5$l(B

$B$?>l9g$K$O(B, $BEy9b@~$N4V3V$,(B @var{(vmax-vmin)/step} $B$H$J$k(B.

$B$?>l9g$K$O(B, $BEy9b@~$N4V3V$,(B (@var{vmax}-@var{vmin})/@var{step} $B$H$J$k(B.

(@var{[z},@code{-2},@code{2},@code{16}@var{]}.)

([@var{z},@code{-2},@code{2},@code{16}].)

@item id

$B1s3V%W%m%;%9$NHV9f(B, $B$9$J$o$A(B @code{ox_launch()} $B$,JV$7$?HV9f$r;XDj$9$k(B.

Line 2029 Function @code{ifplot()} draws a graph of real zeros o

Line 2064 Function @code{ifplot()} draws a graph of real zeros o

function.

Function @code{conplot()} plots the contour lines for a same argument.

Function @code{plot()} draws the graph of a uninivariate function.

Function @code{polarplot()} draws the graph of a curve given in polar form

@var{r}=@var{f}(@var{theta}).

@item

The plotting functions are realized by an OpenXM server.

On UNIX it is @samp{ox_plot} in @b{Asir} root directory.

On Windows @samp{engine} acts as @samp{ox_plot}.

Of course, it must be activated by @code{ox_launch()} @code{ox_launch_nox()}.

If the identifier of an active @samp{ox_plot} is specified as @var{id},

the server is used for drawing pictures.

If @var{id} is not specified, an available @samp{ox_plot} server

is used if it exists. If no @samp{ox_plot} server is available,

then @code{ox_launch_nox()} is automatically executed to

invoke @samp{ox_plot}.

@item

Argument @var{func} is indispensable. Other arguments are optional.

Line 2043 are listed below.

Line 2086 are listed below.

@table @var

@item geometry

Window size is specified by @var{[x,y]} in unit `dot.'

Window size is specified by [@var{x},@var{y}] in unit `dot.'

(@var{[}@code{300},@code{300}@var{]} for UNIX version;

[@code{300},@code{300}] for UNIX version;

@item xrange, yrange

@item xrange yrange

Value ranges of the variables are specified by @var{[v,vmin,vmax]}.

Value ranges of the variables are specified by [@var{v},@var{vmin},@var{vmax}].

(@var{[v},@code{-2},@code{2}@var{]} for each variable.)

([@var{v},@code{-2},@code{2}] for each variable.)

If this specification is omitted, the indeterminate having the higher

order in @var{func} is taken for @samp{x} and the one with lower order

is taken for @samp{y}. To change this selection, specify explicitly

Line 2057 For an uni-variate function, the specification is mand

Line 2100 For an uni-variate function, the specification is mand

@item zrange

This specification applies only to @code{conplot()}. The format is

@var{[v,vmin,vmax} @code{[},@var{step} @code{]}@var{]}.

[@var{v},@var{vmin},@var{vmax} @code{[},@var{step} @code{]}].

If @var{step} is specified, the height difference of contours is set to

@var{(vmax-vmin)/step}.

(@var{vmax}-@var{vmin})/@var{step}.

(@var{[z},@code{-2},@code{2},@code{16}@var{]}.)

([@var{z},@code{-2},@code{2},@code{16}].)

@item id

This specifies the number of the remote process by which you wish

Line 2206 plot*form*ydone*background:white

Line 2249 plot*form*ydone*background:white

@item draw_obj(@var{id},@var{index},@var{pointorsegment} [,@var{color}])

\JP :: $B%-%c%s%P%9>e$KE@$^$?$O@~J,$rIA2h$9$k(B.

\EG :: Draws a point or a line segment on a canvas.

@item draw_string(@var{id},@var{index},@var{[x,y]},@var{string} [,@var{color}])

@item draw_string(@var{id},@var{index},[@var{x},@var{y}],@var{string} [,@var{color}])

\JP :: $B%-%c%s%P%9>e$KJ8;zNs$rIA2h$9$k(B.

\EG :: Draws a character string on a canvas.

@end table

Line 2214 plot*form*ydone*background:white

Line 2257 plot*form*ydone*background:white

@table @var

@item return

@item id, index, color, x, y

@item id index color x y

\JP $B@0?t(B

\EG integer

@item pointorsegment

Line 2238 These functions are supplied by the OpenXM server @sam

Line 2281 These functions are supplied by the OpenXM server @sam

@item

\BJP

@code{open_canvas} $B$O(B, $BIA2hMQ$N%&%#%s%I%&(B($B%-%c%s%P%9(B)$B$r@8@.$9$k(B.

@var{geometry} $B$K$h$j%&%#%s%I%&$N%5%$%:$r(B pixel $BC10L$G(B @var{[x,y]} $B$G;XDj$9$k(B.

@var{geometry} $B$K$h$j%&%#%s%I%&$N%5%$%:$r(B pixel $BC10L$G(B [@var{x},@var{y}] $B$G;XDj$9$k(B.

default size $B$O(B @var{[}@code{300},@code{300}@var{]}.

default size $B$O(B [@code{300},@code{300}].

$B%-%c%s%P%9$N<1JL;R$H$7$F(B, $B@0?tCM$r(B OpenXM $B%5!<%P$N%9%?%C%/$K(B push $B$9$k(B.

$B$3$N<1JL;R$O(B @code{draw_obj} $B$N8F$S=P$7$KI,MW$G$"$j(B, @code{ox_pop_cmo} $B$K(B

$B$h$j<h$j=P$7$FJ];}$9$kI,MW$,$"$k(B.

Line 2247 default size $B$O(B @var{[}@code{300},@code{300}@var

Line 2290 default size $B$O(B @var{[}@code{300},@code{300}@var

\BEG

@code{open_canvas} opens a canvas, which is a window for drawing objecgts.

One can specifies the size of a canvas in pixel by

supplying @var{geometry} option @var{[x,y]}. The default size is

supplying @var{geometry} option [@var{x},@var{y}]. The default size is

@var{[}@code{300},@code{300}@var{]}.

[@code{300},@code{300}].

This function pushes an integer value onto the stack of the OpenXM server.

The value is used to distiguish the opened canvas and one has to pop

and maintain the value by @code{ox_pop_cmo} for subsequent calls of

Line 2267 and a canvas id @var{index}.

Line 2310 and a canvas id @var{index}.

\BJP

@code{draw_obj} $B$O(B, $B%5!<%P(B id @var{id}, $B%-%c%s%P%9(B id @var{index}

$B$G;XDj$5$l$k%-%c%s%P%9$KE@$^$?$O@~J,$rIA2h$9$k(B. @var{pointorsegment}

$B$,(B @var{[x,y]} $B$N>l9gE@$N:BI8(B, @var{[x,y,u,v]} $B$N>l9g(B @var{[x,y]},

$B$,(B [@var{x},@var{y}] $B$N>l9gE@$N:BI8(B, [@var{x},@var{y},@var{u},@var{v}] $B$N>l9g(B [@var{x},@var{y}],

@var{[u,v]} $B$r7k$V@~J,$rI=$9$H8+$J$5$l$k(B.

[@var{u},@var{v}] $B$r7k$V@~J,$rI=$9$H8+$J$5$l$k(B.

$B%-%c%s%P%9$N:BI8$O(B, $B:8>e6y$r86E@$H$7$F2#J}8~$K(B

$BBh0l:BI8(B, $B=DJ}8~$KBhFs:BI8$r$H$k(B. $BCM$O(B pixel $BC10L$G;XDj$9$k(B.

@var{color} $B$N;XDj$,$"$k>l9g(B, @var{color/65536} mod 256,

Line 2278 and a canvas id @var{index}.

Line 2321 and a canvas id @var{index}.

\BEG

@code{draw_obj} draws a point or a line segment on

a canvas specified by a server id @var{id} and a canvas id @var{index}.

If @var{pointorsegment} is @var{[x,y]}, it is regarded as a point.

If @var{pointorsegment} is [@var{x},@var{y}], it is regarded as a point.

If @var{pointorsegment} is @var{[x,y,u,v]}, it is regarded

If @var{pointorsegment} is [@var{x},@var{y},@var{u},@var{v}], it is regarded

as a line segment which connects @var{[x,y]} and @var{[u,v]}.

as a line segment which connects [@var{x},@var{y}] and [@var{u},@var{v}].

If @var{color} is specified, @var{color/65536} mod 256,

@var{color/256} mod 256, @var{color} mod 256 are regarded as the vaules

of Red, Green, Blue (Max. 255) respectively.

Line 2288 of Red, Green, Blue (Max. 255) respectively.

Line 2331 of Red, Green, Blue (Max. 255) respectively.

@item

\BJP

@code{draw_string} $B$O(B, $B%5!<%P(B id @var{id}, $B%-%c%s%P%9(B id @var{index}

$B$G;XDj$5$l$k%-%c%s%P%9$KJ8;zNs$rIA2h$9$k(B. $B0LCV$O(B @var{[x,y]} $B$K$h$j;XDj$9$k(B.

$B$G;XDj$5$l$k%-%c%s%P%9$KJ8;zNs$rIA2h$9$k(B. $B0LCV$O(B [@var{x},@var{y}] $B$K$h$j;XDj$9$k(B.

\BEG

@code{draw_string} draws a character string @var{string} on

a canvas specified by a server id @var{id} and a canvas id @var{index}.

The position of the string is specified by @var{[x,y]}.

The position of the string is specified by [@var{x},@var{y}].

@end itemize

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