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|
%D \module
%D [ file=mp-mlib.mpiv,
%D version=2008.03.21,
%D title=\CONTEXT\ \METAPOST\ graphics,
%D subtitle=plugins,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See licen-en.pdf for
%C details.
if unknown mplib : endinput ; fi ;
if known context_mlib : endinput ; fi ;
boolean context_mlib ; context_mlib := true ;
%D Color and transparency
%D
%D Separable:
newinternal normaltransparent ; normaltransparent := 1 ;
newinternal multiplytransparent ; multiplytransparent := 2 ;
newinternal screentransparent ; screentransparent := 3 ;
newinternal overlaytransparent ; overlaytransparent := 4 ;
newinternal softlighttransparent ; softlighttransparent := 5 ;
newinternal hardlighttransparent ; hardlighttransparent := 6 ;
newinternal colordodgetransparent ; colordodgetransparent := 7 ;
newinternal colorburntransparent ; colorburntransparent := 8 ;
newinternal darkentransparent ; darkentransparent := 9 ;
newinternal lightentransparent ; lightentransparent := 10 ;
newinternal differencetransparent ; differencetransparent := 11 ;
newinternal exclusiontransparent ; exclusiontransparent := 12 ;
%D Nonseparable:
newinternal huetransparent ; huetransparent := 13 ;
newinternal saturationtransparent ; saturationtransparent := 14 ;
newinternal colortransparent ; colortransparent := 15 ;
newinternal luminositytransparent ; luminositytransparent := 16 ;
vardef transparency_alternative_to_number(expr name) =
if string name :
if expandafter known scantokens(name & "transparent") :
scantokens(name & "transparent")
else :
0
fi
elseif name < 17 :
name
else :
0
fi
enddef ;
def namedcolor (expr n) =
1
withprescript "sp_type=named"
withprescript "sp_name=" & n
enddef ;
def spotcolor(expr n, v) =
1
withprescript "sp_type=spot"
withprescript "sp_name=" & n
withprescript "sp_value=" & v
enddef ;
def multitonecolor(expr name, fractions, components, value) =
1
withprescript "sp_type=multitone"
withprescript "sp_name=" & name
withprescript "sp_fractions=" & decimal fractions
withprescript "sp_components=" & components
withprescript "sp_value=" & value
enddef ;
def transparent(expr alternative, transparency)(text c) =
1 % this permits withcolor x intoshade y
withprescript "tr_alternative=" & decimal transparency_alternative_to_number(alternative)
withprescript "tr_transparency=" & decimal transparency
withcolor c
enddef ;
def withtransparency(expr alternative, transparency) =
withprescript "tr_alternative=" & decimal transparency_alternative_to_number(alternative)
withprescript "tr_transparency=" & decimal transparency
enddef ;
def cmyk(expr c, m, y, k) = % provided for downward compability
(c,m,y,k)
enddef ;
% Texts (todo: better strut ratio, now .7 hardcoded, should be passed)
newinternal textextoffset ; textextoffset := 0 ;
numeric mfun_tt_w[], mfun_tt_h[], mfun_tt_d[] ; % we can consider using colors (less hash space)
numeric mfun_tt_n ; mfun_tt_n := 0 ;
picture mfun_tt_p ; mfun_tt_p := nullpicture ;
if unknown mfun_trial_run :
boolean mfun_trial_run ;
mfun_trial_run := false ;
else :
% already defined before the format is loaded
fi ;
if unknown mfun_first_run :
boolean mfun_first_run ;
mfun_first_run := true ;
else :
% already defined before the format is loaded
fi ;
def mfun_reset_tex_texts =
mfun_tt_n := 0 ;
mfun_tt_p := nullpicture ;
enddef ;
def mfun_flush_tex_texts =
addto currentpicture also mfun_tt_p
enddef ;
extra_endfig := "mfun_flush_tex_texts ;" & extra_endfig ;
extra_beginfig := extra_beginfig & "mfun_reset_tex_texts ;" ;
% We collect and flush them all, as we can also have temporary textexts
% that gets never really flushed but are used for calculations. So, we
% flush twice: once in location in order to pick up e.g. color properties,
% and once at the end because we need to flush missing ones.
vardef rawtextext(expr str) =
if str = "" :
nullpicture
elseif mfun_trial_run :
mfun_tt_n := mfun_tt_n + 1 ;
addto mfun_tt_p doublepath unitsquare
withprescript "tx_number=" & decimal mfun_tt_n
withprescript "tx_stage=extra"
withpostscript str ;
image (
addto currentpicture doublepath unitsquare
withprescript "tx_number=" & decimal mfun_tt_n
withprescript "tx_stage=trial"
withpostscript str
)
else :
mfun_tt_n := mfun_tt_n + 1 ;
if known mfun_tt_d[mfun_tt_n] :
image (
addto currentpicture doublepath unitsquare
xscaled mfun_tt_w[mfun_tt_n]
yscaled (mfun_tt_h[mfun_tt_n] + mfun_tt_d[mfun_tt_n])
withprescript "tx_number=" & decimal mfun_tt_n
withprescript "tx_stage=final"
; % withpostscript str ;
) shifted (0,-mfun_tt_d[mfun_tt_n])
else :
image (
addto currentpicture doublepath unitsquare ;
)
fi
fi
enddef ;
% More text
defaultfont := "Mono" ; % was cmr10, could be lmmono10-regular, but is fed into context anyway
vardef fontsize expr name =
save size ; numeric size ;
size := bbwidth(textext("\MPfontsizehskip{" & name & "}")) ;
if size = 0 :
12pt
else :
size
fi
enddef ;
pair mfun_laboff ; mfun_laboff := (0,0) ;
pair mfun_laboff.lft ; mfun_laboff.lft := (-1,0) ;
pair mfun_laboff.rt ; mfun_laboff.rt := (1,0) ;
pair mfun_laboff.bot ; mfun_laboff.bot := (0,-1) ;
pair mfun_laboff.top ; mfun_laboff.top := (0,1) ;
pair mfun_laboff.ulft ; mfun_laboff.ulft := (-.7,.7) ;
pair mfun_laboff.urt ; mfun_laboff.urt := (.7,.7) ;
pair mfun_laboff.llft ; mfun_laboff.llft := -(.7,.7) ;
pair mfun_laboff.lrt ; mfun_laboff.lrt := (.7,-.7) ;
pair mfun_laboff.d ; mfun_laboff.d := mfun_laboff ;
pair mfun_laboff.dlft ; mfun_laboff.dlft := mfun_laboff.lft ;
pair mfun_laboff.drt ; mfun_laboff.drt := mfun_laboff.rt ;
pair mfun_laboff.origin ; mfun_laboff.origin := origin ;
pair mfun_laboff.raw ; mfun_laboff.raw := origin ;
pair mfun_laboff.l ; mfun_laboff.l := mfun_laboff.lft ;
pair mfun_laboff.r ; mfun_laboff.r := mfun_laboff.rt ;
pair mfun_laboff.b ; mfun_laboff.b := mfun_laboff.bot ;
pair mfun_laboff.t ; mfun_laboff.t := mfun_laboff.top ;
pair mfun_laboff.l_t ; mfun_laboff.l_t := mfun_laboff.ulft ;
pair mfun_laboff.r_t ; mfun_laboff.r_t := mfun_laboff.urt ;
pair mfun_laboff.l_b ; mfun_laboff.l_b := mfun_laboff.llft ;
pair mfun_laboff.r_b ; mfun_laboff.r_b := mfun_laboff.lrt ;
pair mfun_laboff.t_l ; mfun_laboff.t_l := mfun_laboff.ulft ;
pair mfun_laboff.t_r ; mfun_laboff.t_r := mfun_laboff.urt ;
pair mfun_laboff.b_l ; mfun_laboff.b_l := mfun_laboff.llft ;
pair mfun_laboff.b_r ; mfun_laboff.b_r := mfun_laboff.lrt ;
mfun_labxf := 0.5 ;
mfun_labxf.lft := mfun_labxf.l := 1 ;
mfun_labxf.rt := mfun_labxf.r := 0 ;
mfun_labxf.bot := mfun_labxf.b := 0.5 ;
mfun_labxf.top := mfun_labxf.t := 0.5 ;
mfun_labxf.ulft := mfun_labxf.l_t := mfun_labxf.t_l := 1 ;
mfun_labxf.urt := mfun_labxf.r_t := mfun_labxf.t_r := 0 ;
mfun_labxf.llft := mfun_labxf.l_b := mfun_labxf.b_l := 1 ;
mfun_labxf.lrt := mfun_labxf.r_b := mfun_labxf.b_r := 0 ;
mfun_labxf.d := mfun_labxf ;
mfun_labxf.dlft := mfun_labxf.lft ;
mfun_labxf.drt := mfun_labxf.rt ;
mfun_labxf.origin := 0 ;
mfun_labxf.raw := 0 ;
mfun_labyf := 0.5 ;
mfun_labyf.lft := mfun_labyf.l := 0.5 ;
mfun_labyf.rt := mfun_labyf.r := 0.5 ;
mfun_labyf.bot := mfun_labyf.b := 1 ;
mfun_labyf.top := mfun_labyf.t := 0 ;
mfun_labyf.ulft := mfun_labyf.l_t := mfun_labyf.t_l := 0 ;
mfun_labyf.urt := mfun_labyf.r_t := mfun_labyf.t_r := 0 ;
mfun_labyf.llft := mfun_labyf.l_b := mfun_labyf.b_l := 1 ;
mfun_labyf.lrt := mfun_labyf.r_b := mfun_labyf.b_r := 1 ;
mfun_labyf.d := mfun_labyf ;
mfun_labyf.dlft := mfun_labyf.lft ;
mfun_labyf.drt := mfun_labyf.rt ;
mfun_labyf.origin := 0 ;
mfun_labyf.raw := 0 ;
mfun_labtype := 0 ;
mfun_labtype.lft := mfun_labtype.l := 1 ;
mfun_labtype.rt := mfun_labtype.r := 2 ;
mfun_labtype.bot := mfun_labtype.b := 3 ;
mfun_labtype.top := mfun_labtype.t := 4 ;
mfun_labtype.ulft := mfun_labtype.l_t := mfun_labtype.t_l := 5 ;
mfun_labtype.urt := mfun_labtype.r_t := mfun_labtype.t_r := 6 ;
mfun_labtype.llft := mfun_labtype.l_b := mfun_labtype.b_l := 7 ;
mfun_labtype.lrt := mfun_labtype.r_b := mfun_labtype.b_r := 8 ;
mfun_labtype.d := 10 ;
mfun_labtype.dlft := 11 ;
mfun_labtype.drt := 12 ;
mfun_labtype.origin := 0 ;
mfun_labtype.raw := 0 ;
% installlabel.foo ( 0, 1, 1, (.5,-1) ) ;
vardef installlabel@# (expr type, x, y, offset) =
numeric labtype@# ; labtype@# := type ;
pair laboff @# ; laboff @# := offset ;
numeric labxf @# ; labxf @# := x ;
numeric labyf @# ; labyf @# := y ;
enddef ;
% we save the plain variant
vardef plain_thelabel@#(expr p,z) =
if string p :
plain_thelabel@#(rawtextext("\definedfont[" & defaultfont & "]" & p) scaled defaultscale,z)
else :
p shifted (z + labeloffset*laboff@# - (labxf@#*lrcorner p + labyf@#*ulcorner p + (1-labxf@#-labyf@#)*llcorner p))
fi
enddef;
def plain_label = % takes two arguments, contrary to textext that takes one
draw plain_thelabel
enddef ;
let mfun_label = label ;
let mfun_thelabel = thelabel ;
def useplainlabels =
let label = plain_label ;
let thelabel = plain_thelabel ;
enddef ;
def usemetafunlabels =
let label = mfun_label ;
let thelabel = mfun_thelabel ;
enddef ;
plain_compatibity_data := plain_compatibity_data & "save label, thelabel ;" & "useplainlabels ;" ;
% next comes own own:
vardef thetextext@#(expr p,z) =
% interim labeloffset := textextoffset ;
if string p :
thetextext@#(rawtextext(p),z)
else :
p
if (mfun_labtype@# >= 10) :
shifted (0,ypart center p)
fi
shifted (z + textextoffset*mfun_laboff@# - (mfun_labxf@#*lrcorner p + mfun_labyf@#*ulcorner p + (1-mfun_labxf@#-mfun_labyf@#)*llcorner p))
fi
enddef ;
vardef textext@#(expr p) = % no draw here
thetextext@#(p,origin)
enddef ;
vardef thelabel@#(expr p,z) =
if string p :
thelabel@#(rawtextext("\definedfont[" & defaultfont & "]" & p) scaled defaultscale,z)
else :
p shifted (z + labeloffset*mfun_laboff@# - (mfun_labxf@#*lrcorner p + mfun_labyf@#*ulcorner p + (1-mfun_labxf@#-mfun_labyf@#)*llcorner p))
fi
enddef;
def label = % takes two arguments, contrary to textext that takes one
draw thelabel
enddef ;
vardef anchored@#(expr p, z) = % beware: no "+ mfun_laboff@#" here (never!)
p
if (mfun_labtype@# >= 10) :
shifted (0,ypart center p)
fi
shifted (z + (mfun_labxf@#*lrcorner p + mfun_labyf@#*ulcorner p + (1-mfun_labxf@#-mfun_labyf@#)*llcorner p))
enddef ;
let normalinfont = infont ;
primarydef str infont name = % nasty hack
if name = "" :
textext(str)
else :
textext("\definedfont[" & name & "]" & str)
fi
enddef ;
% Shades
newinternal shadefactor ; shadefactor := 1 ;
pair shadeoffset ; shadeoffset := origin ;
boolean trace_shades ; trace_shades := false ;
def set_linear_vector (suffix a,b)(expr p,n) =
if (n=1) : a := llcorner p ; b := urcorner p ;
elseif (n=2) : a := lrcorner p ; b := ulcorner p ;
elseif (n=3) : a := urcorner p ; b := llcorner p ;
elseif (n=4) : a := ulcorner p ; b := lrcorner p ;
elseif (n=5) : a := .5[ulcorner p,llcorner p] ; b := .5[urcorner p,lrcorner p] ;
elseif (n=6) : a := .5[llcorner p,lrcorner p] ; b := .5[ulcorner p,urcorner p] ;
elseif (n=7) : a := .5[lrcorner p,urcorner p] ; b := .5[llcorner p,ulcorner p] ;
elseif (n=8) : a := .5[urcorner p,ulcorner p] ; b := .5[lrcorner p,llcorner p] ;
else : a := .5[ulcorner p,llcorner p] ; b := .5[urcorner p,lrcorner p] ;
fi ;
enddef ;
def set_circular_vector (suffix ab, r)(expr p,n) =
if (n=1) : ab := llcorner p ;
elseif (n=2) : ab := lrcorner p ;
elseif (n=3) : ab := urcorner p ;
elseif (n=4) : ab := ulcorner p ;
else : ab := center p ; r := .5r ;
fi ;
enddef ;
def circular_shade (expr p, n, ca, cb) =
begingroup ;
save ab, r ; pair ab ; numeric r ;
r := (xpart lrcorner p - xpart llcorner p) ++ (ypart urcorner p - ypart lrcorner p) ;
set_circular_vector(ab,r)(p,n) ;
fill p withcircularshade(ab,ab,0,r,ca,cb) ;
if trace_shades :
drawarrow ab -- ab shifted (0,r) withpen pencircle scaled 1pt withcolor .5white ;
fi ;
endgroup ;
enddef ;
def linear_shade (expr p, n, ca, cb) =
begingroup ;
save a, b, sh ; pair a, b ;
set_linear_vector(a,b)(p,n) ;
fill p withlinearshade(a,b,ca,cb) ;
if trace_shades :
drawarrow a -- b withpen pencircle scaled 1pt withcolor .5white ;
fi ;
endgroup ;
enddef ;
def withcircularshade (expr a, b, ra, rb, ca, cb) =
withprescript "sh_type=circular"
withprescript "sh_domain=0 1"
withprescript "sh_factor=" & decimal shadefactor
withprescript "sh_color_a=" & colordecimals ca
withprescript "sh_color_b=" & colordecimals cb
withprescript "sh_center_a=" & ddecimal (a shifted shadeoffset)
withprescript "sh_center_b=" & ddecimal (b shifted shadeoffset)
withprescript "sh_radius_a=" & decimal ra
withprescript "sh_radius_b=" & decimal rb
enddef ;
def withlinearshade (expr a, b, ca, cb) =
withprescript "sh_type=linear"
withprescript "sh_domain=0 1"
withprescript "sh_factor=" & decimal shadefactor
withprescript "sh_color_a=" & colordecimals ca
withprescript "sh_color_b=" & colordecimals cb
withprescript "sh_center_a=" & ddecimal (a shifted shadeoffset)
withprescript "sh_center_b=" & ddecimal (b shifted shadeoffset)
enddef ;
string mfun_defined_cs_pre[] ; numeric mfun_defined_cs ; mfun_defined_cs := 0 ;
string mfun_prescript_separator ; mfun_prescript_separator := char(13) ;
vardef define_circular_shade (expr a, b, ra, rb, ca, cb) =
mfun_defined_cs := mfun_defined_cs + 1 ;
mfun_defined_cs_pre[mfun_defined_cs] := "sh_type=circular"
& mfun_prescript_separator & "sh_domain=0 1"
& mfun_prescript_separator & "sh_factor=" & decimal shadefactor
& mfun_prescript_separator & "sh_color_a=" & colordecimals ca
& mfun_prescript_separator & "sh_color_b=" & colordecimals cb
& mfun_prescript_separator & "sh_center_a=" & ddecimal (a shifted shadeoffset)
& mfun_prescript_separator & "sh_center_b=" & ddecimal (b shifted shadeoffset)
& mfun_prescript_separator & "sh_radius_a=" & decimal ra
& mfun_prescript_separator & "sh_radius_b=" & decimal rb
;
mfun_defined_cs
enddef ;
vardef define_linear_shade (expr a, b, ca, cb) =
mfun_defined_cs := mfun_defined_cs + 1 ;
mfun_defined_cs_pre[mfun_defined_cs] := "sh_type=linear"
& mfun_prescript_separator & "sh_domain=0 1"
& mfun_prescript_separator & "sh_factor=" & decimal shadefactor
& mfun_prescript_separator & "sh_color_a=" & colordecimals ca
& mfun_prescript_separator & "sh_color_b=" & colordecimals cb
& mfun_prescript_separator & "sh_center_a=" & ddecimal (a shifted shadeoffset)
& mfun_prescript_separator & "sh_center_b=" & ddecimal (b shifted shadeoffset)
;
mfun_defined_cs
enddef ;
primarydef p withshade sc =
p withprescript mfun_defined_cs_pre[sc]
enddef ;
vardef define_sampled_linear_shade(expr a,b,n)(text t) =
mfun_defined_cs := mfun_defined_cs + 1 ;
mfun_defined_cs_pre[mfun_defined_cs] := "ssh_type=linear"
& mfun_prescript_separator & "ssh_center_a=" & ddecimal (a shifted shadeoffset)
& mfun_prescript_separator & "ssh_center_b=" & ddecimal (b shifted shadeoffset)
& mfun_prescript_separator & "ssh_nofcolors=" & decimal n
& mfun_prescript_separator & "ssh_domain=" & domstr
& mfun_prescript_separator & "ssh_extend=" & extstr
& mfun_prescript_separator & "ssh_colors=" & colstr
& mfun_prescript_separator & "ssh_bounds=" & bndstr
& mfun_prescript_separator & "ssh_ranges=" & ranstr
;
mfun_defined_cs
enddef ;
vardef define_sampled_circular_shade(expr a,b,ra,rb,n)(text t) =
mfun_defined_cs := mfun_defined_cs + 1 ;
mfun_defined_cs_pre[mfun_defined_cs] := "ssh_type=circular"
& mfun_prescript_separator & "ssh_center_a=" & ddecimal (a shifted shadeoffset)
& mfun_prescript_separator & "ssh_radius_a=" & decimal ra
& mfun_prescript_separator & "ssh_center_b=" & ddecimal (b shifted shadeoffset)
& mfun_prescript_separator & "ssh_radius_b=" & decimal rb
& mfun_prescript_separator & "ssh_nofcolors=" & decimal n
& mfun_prescript_separator & "ssh_domain=" & domstr
& mfun_prescript_separator & "ssh_extend=" & extstr
& mfun_prescript_separator & "ssh_colors=" & colstr
& mfun_prescript_separator & "ssh_bounds=" & bndstr
& mfun_prescript_separator & "ssh_ranges=" & ranstr
;
mfun_defined_cs
enddef ;
% vardef predefined_linear_shade (expr p, n, ca, cb) =
% save a, b, sh ; pair a, b ;
% set_linear_vector(a,b)(p,n) ;
% define_linear_shade (a,b,ca,cb)
% enddef ;
%
% vardef predefined_circular_shade (expr p, n, ca, cb) =
% save ab, r ; pair ab ; numeric r ;
% r := (xpart lrcorner p - xpart llcorner p) ++ (ypart urcorner p - ypart lrcorner p) ;
% set_circular_vector(ab,r)(p,n) ;
% define_circular_shade(ab,ab,0,r,ca,cb)
% enddef ;
% NEW EXPERIMENTAL CODE
def withlinearshading (expr a, b) =
withprescript "sh_type=linear"
withprescript "sh_domain=0 1"
withprescript "sh_factor=" & decimal shadefactor
withprescript "sh_center_a=" & ddecimal (a shifted shadeoffset)
withprescript "sh_center_b=" & ddecimal (b shifted shadeoffset)
enddef ;
def withcircularshading (expr a, b, ra, rb) =
withprescript "sh_type=circular"
withprescript "sh_domain=0 1"
withprescript "sh_factor=" & decimal shadefactor
withprescript "sh_center_a=" & ddecimal (a shifted shadeoffset)
withprescript "sh_center_b=" & ddecimal (b shifted shadeoffset)
withprescript "sh_radius_a=" & decimal ra
withprescript "sh_radius_b=" & decimal rb
enddef ;
def withfromshadecolor expr t =
withprescript "sh_color=into"
withprescript "sh_color_a=" & colordecimals t
enddef ;
def withtoshadecolor expr t =
withprescript "sh_color=into"
withprescript "sh_color_b=" & colordecimals t
enddef ;
def withshading (expr how)(text rest) =
if how = "linear" :
withlinearshading(rest)
elseif how = "circular" :
withcircularshading(rest)
else :
% nothing
fi
enddef ;
primarydef a shadedinto b =
1 % does not work with transparency
withprescript "sh_color=into"
withprescript "sh_color_a=" & colordecimals a
withprescript "sh_color_b=" & colordecimals b
enddef ;
% Layers
def onlayer primary name =
withprescript "la_name=" & name
enddef ;
% Figures
% def externalfigure primary filename =
% doexternalfigure (filename)
% enddef ;
%
% def doexternalfigure (expr filename) text transformation =
% if true : % a bit incompatible esp scaled 1cm now scaled the natural size
% draw rawtextext("\externalfigure[" & filename & "]") transformation ;
% else :
% draw unitsquare transformation withprescript "fg_name=" & filename ;
% fi ;
% enddef ;
def withmask primary filename =
withprescript "fg_mask=" & filename
enddef ;
def externalfigure primary filename =
if false :
rawtextext("\externalfigure[" & filename & "]")
else :
image (
addto currentpicture doublepath unitsquare
withprescript "fg_name=" & filename ;
)
% unitsquare
% withpen pencircle scaled 0
% withprescript "fg_name=" & filename
fi
enddef ;
def figure primary filename =
rawtextext("\externalfigure[" & filename & "]")
enddef ;
% Positions
def register (expr label, width, height, offset) =
% draw image (
addto currentpicture doublepath unitsquare xscaled width yscaled height shifted offset
withprescript "ps_label=" & label ;
% ) ; % no transformations
enddef ;
% Housekeeping
extra_beginfig := extra_beginfig & "currentgraphictext := 0 ; " ;
extra_endfig := extra_endfig & "finishsavingdata ; " ;
extra_endfig := extra_endfig & "mfun_reset_tex_texts ; " ;
% Bonus
vardef verbatim(expr str) =
ditto & "\detokenize{" & str & "}" & ditto
enddef ;
% New
def bitmapimage(expr xresolution, yresolution, data) =
image (
addto currentpicture doublepath unitsquare
withprescript "bm_xresolution=" & decimal xresolution
withprescript "bm_yresolution=" & decimal yresolution
withpostscript data ;
)
enddef ;
% Experimental:
%
% property p ; p = properties(withcolor (1,1,0,0)) ;
% fill fullcircle scaled 20cm withproperties p ;
let property = picture ;
vardef properties(text t) =
image(draw unitcircle t)
enddef ;
if metapostversion < 1.770 :
def withproperties expr p =
if colormodel p = 3 :
withcolor greypart p
elseif colormodel p = 5 :
withcolor (redpart p,greenpart p,bluepart p)
elseif colormodel p = 7 :
withcolor (cyanpart p,magentapart p,yellowpart p,blackpart p)
fi
enddef ;
else :
def withproperties expr p =
if colormodel p = 3 :
withcolor greypart p
elseif colormodel p = 5 :
withcolor (redpart p,greenpart p,bluepart p)
elseif colormodel p = 7 :
withcolor (cyanpart p,magentapart p,yellowpart p,blackpart p)
fi
withprescript prescript p
withpostscript postscript p
enddef ;
fi ;
% Experimental:
primarydef t asgroup s = % s = isolated|knockout
begingroup
save grouppicture, wrappedpicture, groupbounds ;
picture grouppicture, wrappedpicture ; path groupbounds ;
grouppicture := if picture t : t else : image(draw t) fi ;
groupbounds := boundingbox grouppicture ;
wrappedpicture:= nullpicture ;
addto wrappedpicture contour groupbounds
withprescript "gr_state=start"
withprescript "gr_type=" & s
withprescript "gr_llx=" & decimal xpart llcorner groupbounds
withprescript "gr_lly=" & decimal ypart llcorner groupbounds
withprescript "gr_urx=" & decimal xpart urcorner groupbounds
withprescript "gr_ury=" & decimal ypart urcorner groupbounds ;
addto wrappedpicture also grouppicture ;
addto wrappedpicture contour groupbounds
withprescript "gr_state=stop" ;
wrappedpicture
endgroup
enddef ;
% Also experimental
string mfun_auto_align[] ;
mfun_auto_align[0] := "rt" ;
mfun_auto_align[1] := "urt" ;
mfun_auto_align[2] := "top" ;
mfun_auto_align[3] := "ulft" ;
mfun_auto_align[4] := "lft" ;
mfun_auto_align[5] := "llft" ;
mfun_auto_align[6] := "bot" ;
mfun_auto_align[7] := "lrt" ;
mfun_auto_align[8] := "rt" ;
def autoalign(expr n) =
scantokens mfun_auto_align[round((n mod 360)/45)]
enddef ;
% draw textext.autoalign(60) ("\strut oeps 1") ;
% draw textext.autoalign(160)("\strut oeps 2") ;
% draw textext.autoalign(260)("\strut oeps 3") ;
% draw textext.autoalign(360)("\strut oeps 4") ;
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