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%D \module
%D [ file=mp-back.mp,
%D version=2000.05.31,
%D title=\CONTEXT\ \METAPOST\ graphics,
%D subtitle=backgrounds,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA / Hans Hagen \& Ton Otten}]
%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 known context_back : endinput ; fi ;
boolean context_back ; context_back := true ;
def some_hash ( expr hash_width ,
hash_height ,
hash_linewidth ,
hash_linecolor ,
hash_angle ,
hash_gap ) =
stripe_gap := hash_gap ;
stripe_angle := hash_angle ;
drawoptions (withpen pencircle scaled hash_linewidth
withcolor hash_linecolor) ;
path p ; p := unitsquare xscaled hash_width yscaled hash_height ;
stripe_path_a () (draw) p ; % next we move it all to quadrant 1
currentpicture := currentpicture shifted urcorner currentpicture ;
enddef ;
def some_double_back (expr back_type ,
back_width ,
back_height ,
back_delta ,
back_linewidth ,
back_linecolor ,
back_fillcolor ,
back_topcolor ,
back_bottomcolor ,
back_leftcolor ,
back_rightcolor ) =
numeric ww ; ww := back_width ;
numeric hh ; hh := back_height ;
numeric dd ; dd := back_delta ;
color back_nillcolor ; back_nillcolor := back_topcolor ;
path p ; p := fullsquare xscaled ww yscaled hh ;
path q ; q := fullsquare xscaled (ww-2dd) yscaled (hh-2dd) ;
path r ; r := llcorner p --
lrcorner p shifted (-3dd,0) .. controls lrcorner p ..
lrcorner p shifted (0, 3dd) --
urcorner p shifted (0,-3dd) .. controls urcorner p ..
urcorner p shifted (-3dd,0) --
ulcorner p -- cycle ;
path s ; s := r xscaled ((ww-2dd)/ww) yscaled ((hh-2dd)/hh) ;
path t ; t := llcorner p --
lrcorner p --
urcorner p shifted (0,-3dd) .. controls urcorner p ..
urcorner p shifted (-3dd,0) --
ulcorner p shifted ( 3dd,0) .. controls ulcorner p ..
ulcorner p shifted (0,-3dd) --
llcorner p -- cycle ;
path u ; u := t xscaled ((ww-2dd)/ww) yscaled ((hh-2dd)/hh) ;
path v ; v := llcorner p shifted ( 3dd,0) --
lrcorner p shifted (-3dd,0) .. controls lrcorner p ..
lrcorner p shifted (0, 3dd) --
urcorner p shifted (0,-3dd) .. controls urcorner p ..
urcorner p shifted (-3dd,0) --
ulcorner p shifted ( 3dd,0) .. controls ulcorner p ..
ulcorner p shifted (0,-3dd) ..
llcorner p shifted (0, 3dd) .. controls llcorner p .. cycle ; % {down} .. cycle ;
path w ; w := t xscaled ((ww-2dd)/ww) yscaled ((hh-2dd)/hh) ;
path a ; a := llcorner p -- ulcorner p --
ulcorner q -- llcorner q -- cycle ;
path b ; b := llcorner p -- lrcorner p --
lrcorner q -- llcorner q -- cycle ;
path c ; c := lrcorner p -- urcorner p --
urcorner q -- lrcorner q -- cycle ;
path d ; d := ulcorner p -- urcorner p --
urcorner q -- ulcorner q -- cycle ;
path e ; e := llcorner p -- lrcorner p --
urcorner p -- urcorner q --
lrcorner q -- llcorner q -- cycle ;
path f ; f := llcorner p -- ulcorner p --
urcorner p -- urcorner q --
ulcorner q -- llcorner q -- cycle ;
linecap := butt ; pickup pencircle scaled back_linewidth ;
if back_type=1 :
fill p withcolor back_fillcolor ;
fill a withcolor back_leftcolor ;
fill b withcolor back_bottomcolor ;
fill c withcolor back_rightcolor ;
fill d withcolor back_topcolor ;
draw a withcolor back_linecolor ;
draw d withcolor back_linecolor ;
draw b withcolor back_linecolor ;
draw c withcolor back_linecolor ;
elseif back_type=2 :
fill p withcolor back_fillcolor ;
fill e withcolor back_bottomcolor ;
fill f withcolor back_topcolor ;
draw e withcolor back_linecolor ;
draw f withcolor back_linecolor ;
elseif back_type=3 :
fill v withcolor back_nillcolor ;
fill w withcolor back_fillcolor ;
draw v withcolor back_linecolor ;
draw w withcolor back_linecolor ;
elseif back_type=4 :
fill t withcolor back_nillcolor ;
fill u withcolor back_fillcolor ;
draw t withcolor back_linecolor ;
draw u withcolor back_linecolor ;
elseif back_type=5 :
t := t rotatedaround(center t,180) ;
u := u rotatedaround(center u,180) ;
fill t withcolor back_nillcolor ;
fill u withcolor back_fillcolor ;
draw t withcolor back_linecolor ;
draw u withcolor back_linecolor ;
elseif back_type=6 :
r := r rotatedaround(center r,180) ;
s := s rotatedaround(center s,180) ;
fill r withcolor back_nillcolor ;
fill s withcolor back_fillcolor ;
draw r withcolor back_linecolor ;
draw s withcolor back_linecolor ;
elseif back_type=7 :
fill r withcolor back_nillcolor ;
fill s withcolor back_fillcolor ;
draw r withcolor back_linecolor ;
draw s withcolor back_linecolor ;
fi ;
enddef ;
endinput ;
beginfig (1) ;
some_double_back (1, 4.5cm, 1.5cm, .25cm, 1mm,
.5white, .8white, .7white, .6white, .7white, .6white)
currentpicture := currentpicture shifted (0,-3cm) ;
some_double_back (2, 4.5cm, 1.5cm, .25cm, 1mm,
.5white, .8white, .7white, .6white, white, white)
currentpicture := currentpicture shifted (0,-3cm) ;
some_double_back (3, 4.5cm, 1.5cm, .25cm, 1mm,
.5white, .8white, .7white, white, white, white)
currentpicture := currentpicture shifted (0,-3cm) ;
some_double_back (4, 4.5cm, 1.5cm, .25cm, 1mm,
.5white, .8white, .7white, white, white, white)
currentpicture := currentpicture shifted (0,-3cm) ;
some_double_back (5, 4.5cm, 1.5cm, .25cm, 1mm,
.5white, .8white, .7white, white, white, white)
currentpicture := currentpicture shifted (0,-3cm) ;
some_double_back (6, 4.5cm, 1.5cm, .25cm, 1mm,
.5white, .8white, .7white, white, white, white)
currentpicture := currentpicture shifted (0,-3cm) ;
some_double_back (7, 4.5cm, 1.5cm, .25cm, 1mm,
.5white, .8white, .7white, white, white, white)
currentpicture := currentpicture shifted (0,-3cm) ;
some_double_back (8, 4.5cm, 1.5cm, .25cm, 1mm,
.5white, .8white, .7white, white, white, white)
endfig ;
end .
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