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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
+