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%D \module
%D [ file=simpleslides-s-Automata,
%D version=2010-08-10-15:28:22+0200,
%D title=\CONTEXT\ Style File,
%D subtitle=Presentation Module --- Automaton Style,
%D author=Philipp Gesang,
%D date=\currentdate,
%D copyright={Philipp Gesang}]
%C
%C Copyright 2007 Aditya Mahajan and Thomas A. Schmitz
%C This file may be distributed under the GNU General Public License v. 2.0.
%C Modified 2010 by Philipp Gesang
%D Providing presentation Backgrounds according to Conway's Game of Life.
%D Initially based on the BigNumber theme by A. Mahajan and Th. Schmitz. (Many,
%D many thanks!)
%M \usemodule[simpleslides,style=Automata]
%M \loadsetups[t-simpleslides-automata.xml]
\writestatus{simpleslides}{loading Theme Automata}
\startmodule[simpleslides-s-Automata]
\setupmodule[
mode=,
file=,
rule=,
extendxy=,
clip=,
] % using defaults from lua config
% \ctxlua{environment.loadluafile( "automata-main" )}
\ctxloadluafile{automata-main}
\ctxlua{mplife.slides = true}
\unprotect
%D First, we change the page layout to have more space all around.
\setuplayout [ width=fit,
margin=2cm,
height=fit,
leftmargindistance=.8cm,
rightmargindistance=.0cm,
header=18mm,
%headerdistance=.3cm,
footer=0cm,
%footerdistance=0mm,
%topspace=.5cm,
topspace=.8cm,
backspace=1.9cm,
location=singlesided]
\setuplayout [simpleslides:layout:horizontal][header=18mm]
\setuplayout [simpleslides:layout:vertical] [header=0mm]
\setuplayout [simpleslides:layout:title]
\setuplayer[simpleslides:layer:slidetitle]
[width=\paperwidth,
height=\paperheight,x=20mm]
%D Next we define generic frames, which will be used by other macros to
%D get a consistent look and feel.
\defineframed[simpleslides:framed:small]
[ frame=off,
offset=0pt,
width=1.7cm,
align=middle]
\setupcombinations[distance=2.5em]
%D These macros are used for placing figures/pictures:
\define\NormalHeight {\textheight}
\define\NormalWidth {.46\textwidth}
\define\PictureFrameHeight {\textheight}
\define\PictureFrameWidth {.46\textwidth}
%D This module has two color schemes, a blue one and a red one.
%D “backgroundoutside” and “backgroundscreen” -- obvioulsly -- determine how
%D the background will look like, whereas “contrastcolor” is used to draw the
%D automaton {\em onto} the background. Transparancy of the automaton is
%D adjusted via the “opacity” factor in your automatarc.
\startsetups simpleslides:setups:blue
\definecolor [simpleslides:contrastcolor] [r=0.7,g=0.7,b=0.9]
\definecolor [simpleslides:backgroundoutside] [r=0.9,g=0.9,b=0.95]
\definecolor [simpleslides:backgroundscreen] [s=.975]
\definecolor [simpleslides:textcolor] [s=0]
\stopsetups
\startsetups simpleslides:setups:red
\definecolor [simpleslides:contrastcolor] [r=0.4]
\definecolor [simpleslides:backgroundoutside] [r=0.5,g=0.2,b=0.2]
\definecolor [simpleslides:backgroundscreen] [s=.4]
\definecolor [simpleslides:textcolor] [s=1]
\stopsetups
%D Now we choose the scheme that the user asked for.
\doifsetupselse
{simpleslides:setups:\moduleparameter{simpleslides}{color}}
{\setups{simpleslides:setups:\moduleparameter{simpleslides}{color}}}
{\setups{simpleslides:setups:blue}}
\setupcolors[textcolor={simpleslides:textcolor}]
%D Setting up the automata part. Note that the precedence of settings is:
%D \type{kpse:automatarc-global.lua} < \type{./automatrc.lua} < \type{setupmodule},
%D but some options (such as the color scheme) can only be specified via
%D \type{setupmodule[…]}.
%D First, we check for the automaton type.
\doifsomethingelse{\moduleparameter{simpleslides}{mode}}{\ctxlua{
mplife.setup.current.mode = "\luaescapestring{\moduleparameter{simpleslides}{mode}}"
if mplife.setup.current.mode == "life" then
mplife.successive = mplife.gol_successive
else
environment.loadluafile("automata-eca")
mplife.successive = mplife.eca_successive
end}}
{\ctxlua{mplife.successive = mplife.gol_successive}}
%D The number of dead cells to add left and right / before and after
%D the initial frame. (Makes sense only for Game of Life.)
\doifsomething{\moduleparameter{simpleslides}{extendxy}}{\ctxlua
{mplife.setup.current.extendx = tonumber("\luaescapestring{\moduleparameter{simpleslides}{extendxy}}")
mplife.setup.current.extendy = tonumber("\luaescapestring{\moduleparameter{simpleslides}{extendxy}}") }}
\doifsomething{\moduleparameter{simpleslides}{extendx}}{\ctxlua
{mplife.setup.current.extendx = tonumber("\luaescapestring{\moduleparameter{simpleslides}{extendx}}") }}
\doifsomething{\moduleparameter{simpleslides}{extendy}}{\ctxlua
{mplife.setup.current.extendy = tonumber("\luaescapestring{\moduleparameter{simpleslides}{extendy}}") }}
%D Initial “tape”, i.e. the first frame with respect to Game of Life automata
%D and the first line for Elementary automata. Filenames without suffix expand
%D to \type{file .. ".gol"}.
\doifsomething{\moduleparameter{simpleslides}{file}}{\ctxlua
{mplife.setup.current.file = "\luaescapestring{\moduleparameter{simpleslides}{file}}" }}
%D Clipping is essential to cope with left/right propagation of
%D patterns. E.g. with rule 158 the total propagation at iteration
%D n is itself n to the left and n to the right. Whereas rule 102
%D (a Sierpiński fractal generator) protrudes only to the left at
%D a rate of n.
%D Frames cannot be simply cut off at the borders with adjacient
%D cells treated as “dead” because it would distort the pattern.
%D Therefore, frames are generated as complete sections which are
%D clipped to the desired size, as specified by the initial row.
%D To determine whether to clip your pattern to the left, right,
%D or in both directions, check the propagation at
%D \type{string.format("http://mathworld.wolfram.com/Rule%s.html", rule)}
%D or consult Wolfram's “A New Kind of Science” but beware not to
%D buy everything he claims…
%D
%D Accepts values: \type{left}, \type{right} and \type{both}.
\doifsomething{\moduleparameter{simpleslides}{clip}}{\ctxlua
{mplife.setup.current.clip = "\luaescapestring{\moduleparameter{simpleslides}{clip}}" }}
\startluacode
do
local c = mplife.setup.current
if c.mode == "life" then
c.init = gol.parse_file(c.file)
c.last = c.init
else
c.init = eca.parse_file(c.file)
c.framesize = math.floor(c.aspect * c.init:len())
c.pages = structures.counters.record("realpage")["last"]
if c.clip then
c.xneeded = c.pages * c.framesize
if c.clip == "both" then -- Assume initial pattern is centered.
c.diff = c.xneeded - math.ceil(c.init:len()/2)
else
c.diff = c.xneeded - c.init:len()
end
if c.diff > 0 then
local affix = ""
for i=1, c.diff, 1 do
affix = affix .. "0"
end
if c.clip == "left" or c.clip == "both" then
c.init = affix .. c.init
end
if c.clip == "right" or c.clip == "both" then
c.init = c.init .. affix
end
end
end
end
mplife.setup.current = c
end
\stopluacode
%D Rules determine the transformation from one iteration to the next.
%D {\em Life} rules take the form \type{B3/S23}, the separator being any of \type{/},
%D \type{.} and \type{-}.
%D Rules for elementary cellular automata are given in decimal: \type{1}--\type{255}.
\doifsomething{\moduleparameter{simpleslides}{rule}}{\ctxlua
{if mplife.setup.current.mode == "life" then
mplife.setup.current.rule = gol.parse_rule("\luaescapestring{\moduleparameter{simpleslides}{rule}}")
else
mplife.setup.current.rule = eca.gen_rule(tonumber("\luaescapestring{\moduleparameter{simpleslides}{rule}}"))
end}}
%D We also use \METAPOST\ to draw the horizontal and vertical page backgrounds.
%D Backgrounds will be of solid color, the ornament gets the transparency.
\startuniqueMPgraphic{simpleslides:MP:horizontal}
StartPage ;
fill Page withcolor \MPcolor{simpleslides:backgroundoutside} ;
fill Field[Text][Text] enlarged 0.2cm
withcolor \MPcolor{simpleslides:backgroundscreen} ;
StopPage ;
\stopuniqueMPgraphic
\startuniqueMPgraphic{simpleslides:MP:vertical}
StartPage ;
fill Page withcolor \MPcolor{simpleslides:backgroundoutside} ;
z1 = urcorner Field[Text][Text] shifted (.2cm,0) ;
z2 = lrcorner Field[Text][Text] shifted (.2cm,-.2cm) ;
z3 = z1 shifted (-8.05cm,0) ;
z4 = (x3,y2) ;
save Main ;
path Main ;
Main := z1 -- z2 -- z4 -- z3 --cycle ;
fill Main withcolor \MPcolor{simpleslides:backgroundscreen} ;
StopPage ;
\stopuniqueMPgraphic
%D We define these backgrounds as overlays:
\defineoverlay
[simpleslides:background:horizontal]
[\useMPgraphic{simpleslides:MP:horizontal}]
\defineoverlay
[simpleslides:background:vertical]
[\useMPgraphic{simpleslides:MP:vertical}]
\defineoverlay
[simpleslides:background:title]
[\useMPgraphic{simpleslides:MP:horizontal}]
\defineoverlay
[simpleslides:background:ornament]
[\ctxlua{mplife.successive()}]
%D The slide title is placed on the top of the text area. The layer takes care
%D of the positioning.
\setupSlideTitle
[\c!after=,
\c!alternative=layer,
\c!width=\textwidth,
\c!height=2.5cm,
\c!command=\doSlideTitle]
%D Squares are used as the first level of itemizations
\definesymbol[1][$\square$]
\setupitemize[1][inmargin]
%\setupitemize[each][joinedup,unpacked]
\protect
\stopmodule
\endinput
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