summaryrefslogtreecommitdiff
path: root/metapost
diff options
context:
space:
mode:
authorHans Hagen <pragma@wxs.nl>2000-10-22 00:00:00 +0200
committerHans Hagen <pragma@wxs.nl>2000-10-22 00:00:00 +0200
commite78478392e9717499b101d0fed642c945c104097 (patch)
tree7f3dbe64040cbcf413644cae6516872c0fb5cd2b /metapost
parent73000ea3b7c8225c980f40ef90b86e2d57fe4003 (diff)
downloadcontext-e78478392e9717499b101d0fed642c945c104097.tar.gz
stable 2000.10.22
Diffstat (limited to 'metapost')
-rw-r--r--metapost/context/metafun.mp41
-rw-r--r--metapost/context/mp-back.mp206
-rw-r--r--metapost/context/mp-butt.mp75
-rw-r--r--metapost/context/mp-char.mp968
-rw-r--r--metapost/context/mp-core.mp232
-rw-r--r--metapost/context/mp-page.mp218
-rw-r--r--metapost/context/mp-shap.mp261
-rw-r--r--metapost/context/mp-spec.mp147
-rw-r--r--metapost/context/mp-text.mp202
-rw-r--r--metapost/context/mp-tool.mp1216
10 files changed, 3566 insertions, 0 deletions
diff --git a/metapost/context/metafun.mp b/metapost/context/metafun.mp
new file mode 100644
index 000000000..802264351
--- /dev/null
+++ b/metapost/context/metafun.mp
@@ -0,0 +1,41 @@
+%D \module
+%D [ file=metafun.mp,
+%D version=2000.07.15,
+%D title=\CONTEXT\ \METAPOST\ graphics,
+%D subtitle=format generation file,
+%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 mreadme.pdf for
+%C details.
+
+%D When generating many graphics at runtime, it can save run
+%D time to use a format file. We could have named this file
+%D \type {context}, but this is error prone, because it forces
+%D to use the progname \type {mpost} or \type {context}
+%D explicitly, depending on the needs. When using the format,
+%D a mismatch in the memory specification of \type {mpost} or
+%D \type {context} (the \TEX\ one) could lead to lost strings
+%D (and as a result in buggy boundingbox and special
+%D handling). By using the name \type {metatex} we make sure
+%D %D that we use (unless overloaded) the settings of \type
+%D {mpost}.
+
+if unknown ahangle :
+ input plain.mp ; % John Hobby's file
+else :
+ let dump = relax ;
+fi ;
+
+input mp-tool.mp ;
+input mp-spec.mp ;
+input mp-core.mp ;
+input mp-page.mp ;
+input mp-text.mp ;
+input mp-shap.mp ;
+input mp-butt.mp ;
+input mp-char.mp ;
+
+dump ; endinput .
diff --git a/metapost/context/mp-back.mp b/metapost/context/mp-back.mp
new file mode 100644
index 000000000..99e88554b
--- /dev/null
+++ b/metapost/context/mp-back.mp
@@ -0,0 +1,206 @@
+%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 unknown context_tool : input mp-tool ; fi ;
+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 .
diff --git a/metapost/context/mp-butt.mp b/metapost/context/mp-butt.mp
new file mode 100644
index 000000000..cf580211e
--- /dev/null
+++ b/metapost/context/mp-butt.mp
@@ -0,0 +1,75 @@
+%D \module
+%D [ file=mp-butt.mp,
+%D version=2000.05.31,
+%D title=\CONTEXT\ \METAPOST\ graphics,
+%D subtitle=buttons,
+%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 unknown context_tool : input mp-tool ; fi ;
+if known context_butt : endinput ; fi ;
+
+boolean context_butt ; context_butt := true ;
+
+def some_button (expr button_type ,
+ button_size ,
+ button_linecolor ,
+ button_fillcolor ) =
+
+ numeric button_linewidth ; button_linewidth := button_size/10 ;
+
+ drawoptions (withpen pencircle scaled button_linewidth
+ withcolor button_linecolor) ;
+
+ path p ; p := unitsquare scaled button_size ;
+ numeric d ; d := button_size ;
+ numeric l ; l := button_linewidth ;
+
+ fill p withcolor button_fillcolor ; draw p ;
+
+ if button_type=101 :
+ draw (d-2l,2l)--(2l,.5d)--(d-2l,d-2l)--cycle ;
+ elseif button_type=102 :
+ draw (2l,2l)--(d-2l,.5d)--(2l,d-2l)--cycle ;
+ elseif button_type=103 :
+ for i=2l step 2l until d-2l :
+ draw (2l,i)--(2l ,i) ;
+ draw (4l,i)--(d-2l,i) ;
+ endfor ;
+ elseif button_type=104 :
+ for i=2l step 2l until d-2l :
+ draw (2l ,i)--(d/2-l,i) ;
+ draw (d/2+l,i)--(d-2l ,i) ;
+ endfor ;
+ elseif button_type=105 :
+ fill fullcircle scaled (.2d) shifted (.5d,.7d) ;
+ fill fullcircle xscaled (.6d) yscaled d shifted (.5d,0) ;
+ clip currentpicture to p ;
+ draw p ;
+ elseif button_type=106 :
+ draw (2l,2l)--(d-2l,d-2l) ;
+ draw (d-2l,2l)--(2l,d-2l) ;
+ elseif button_type=107 :
+ p := (3l,d-2l)--(d-3l,d-2l)--(.5d,4l)--cycle ;
+ fill p ; draw p ;
+ draw (.5d,2l) ;
+ elseif button_type=108 :
+ draw (.5d,2l)--(d-2l,d-2l)--(2l,d-2l)--cycle ;
+ elseif button_type=109 :
+ draw (.5d,d-2l)--(d-2l,2l)--(2l,2l)--cycle ;
+ elseif button_type=110 :
+ button_linewidth := button_linewidth/2 ;
+ draw p enlarged (-2l,-l) ;
+ for i=2l step l until d-2l :
+ draw (3l,i)--(d-3l,i) ;
+ endfor ;
+ fi ;
+
+enddef ;
+
+endinput ;
diff --git a/metapost/context/mp-char.mp b/metapost/context/mp-char.mp
new file mode 100644
index 000000000..8c0d53f75
--- /dev/null
+++ b/metapost/context/mp-char.mp
@@ -0,0 +1,968 @@
+%D \module
+%D [ file=mp-char.mp,
+%D version=1998.10.10,
+%D title=\CONTEXT\ \METAPOST\ graphics,
+%D subtitle=charts,
+%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 unknown context_tool : input mp-tool ; fi ;
+if unknown context_shap : input mp-shap ; fi ;
+if known context_char : endinput ; fi ;
+
+boolean context_char ; context_char := true ;
+
+vardef enlarged_path (expr p, w) = % NAAR mp-tool
+ (llcorner p shifted (-w,-w) --
+ lrcorner p shifted ( w,-w) --
+ urcorner p shifted ( w, w) --
+ ulcorner p shifted (-w, w) -- cycle)
+enddef;
+
+secondarydef p peepholed q =
+ begingroup ;
+ save start ; pair start ; start := point 0 of p ;
+ %drawdot start scaled_to_grid withpen pencircle scaled 2shape_line_width withcolor red ;
+ if xpart start >= xpart center p :
+ if ypart start >= ypart center p :
+ urcorner q -- ulcorner q -- llcorner q -- lrcorner q --
+ reverse p -- lrcorner q -- cycle
+ else :
+ lrcorner q -- urcorner q -- ulcorner q -- llcorner q --
+ reverse p -- llcorner q -- cycle
+ fi
+ else :
+ if ypart start > ypart center p :
+ ulcorner q -- llcorner q -- lrcorner q -- urcorner q --
+ reverse p -- urcorner q -- cycle
+ else :
+ llcorner q -- lrcorner q -- urcorner q -- ulcorner q --
+ reverse p -- ulcorner q -- cycle
+ fi
+ fi
+ endgroup
+enddef ;
+
+boolean intersection_found ;
+
+secondarydef p intersection_point q =
+ begingroup
+ save x_, y_ ;
+ (x_,y_) = p intersectiontimes q ;
+ if x_<0 :
+ intersection_found := false ;
+ center p % origin
+ else :
+ intersection_found := true ;
+ .5[point x_ of p, point y_ of q]
+ fi
+ endgroup
+enddef ;
+
+current_position := 0 ;
+
+def save_text_position (expr p) = % beware: clip shift needed
+ current_position := current_position + 1 ;
+ savedata
+ "\MPposition{" & decimal current_position & "}{"
+ & decimal xpart p & "}{"
+ & decimal ypart p & "}" ;
+enddef ;
+
+%D settings
+
+grid_width := 60pt ;
+grid_height := 40pt ;
+
+shape_width := 45pt ;
+shape_height := 30pt ;
+
+chart_offset := 2pt ;
+
+color chart_background_color ; chart_background_color := white ;
+
+%D test mode
+
+boolean show_mid_points ; show_mid_points := false ;
+boolean show_con_points ; show_con_points := false ;
+boolean show_all_points ; show_all_points := false ;
+
+%D shapes
+
+color shape_line_color, shape_fill_color ;
+
+shape_line_width := 2pt ;
+shape_line_color := .5white ;
+shape_fill_color := .9white ;
+
+shape_node := 0 ;
+shape_action := 24 ;
+shape_procedure := 5 ;
+shape_product := 12 ;
+shape_decision := 14 ;
+shape_archive := 19 ;
+shape_loop := 35 ;
+shape_wait := 6 ;
+shape_subprocedure := 20 ; shape_sub_procedure := 20 ;
+shape_singledocument := 32 ; shape_single_document := 32 ;
+shape_multidocument := 33 ; shape_multi_document := 33 ;
+shape_right := 66 ;
+shape_left := 67 ;
+shape_up := 68 ;
+shape_down := 69 ;
+
+% vardef some_shape_path (expr type) == imported from mp-shap
+
+def show_shapes (expr n) =
+
+ begin_chart(n,8,10) ;
+ show_con_points := true ;
+ for i=0 upto 7 :
+ for j=0 upto 9 :
+ new_shape(i+1,j+1,i*10+j);
+ endfor ;
+ endfor ;
+ end_chart ;
+
+enddef ;
+
+%D connections
+
+color connection_line_color ;
+
+connection_line_width := shape_line_width ;
+connection_line_color := .8white ;
+connection_smooth_size := 5pt ;
+connection_arrow_size := 4pt ;
+connection_dash_size := 3pt ;
+
+max_x := 6 ;
+max_y := 4 ;
+
+numeric xypoint ; xypoint := 0 ;
+
+pair xypoints [] ;
+
+boolean xyfree [][] ;
+path xypath [][] ;
+numeric xysx [][] ;
+numeric xysy [][] ;
+color xyfill [][] ;
+color xydraw [][] ;
+numeric xyline [][] ;
+boolean xypeep [][] ;
+
+numeric cpath ; cpath := 0 ;
+path cpaths [] ;
+numeric cline [] ;
+color ccolor [] ;
+boolean carrow [] ;
+boolean cdash [] ;
+boolean ccross [] ;
+
+boolean smooth ; smooth := true ;
+boolean peepshape ; peepshape := false ;
+boolean arrowtip ; arrowtip := true ;
+boolean dashline ; dashline := false ;
+boolean forcevalid ; forcevalid := false ;
+boolean touchshape ; touchshape := false ;
+boolean showcrossing ; showcrossing := false ;
+
+picture dash_pattern ;
+
+boolean reverse_y ; reverse_y := true ;
+
+def y_pos (expr y) =
+ if reverse_y : max_y + 1 - y else : y fi
+enddef ;
+
+def initialize_grid (expr maxx, maxy) =
+ begingroup ;
+ save i, j ;
+ max_x := maxx ;
+ max_y := maxy ;
+ for x=1 upto max_x :
+ for y=1 upto max_y :
+ xyfree [x][y] := true ;
+ xyfill [x][y] := shape_fill_color ;
+ xydraw [x][y] := shape_line_color ;
+ xyline [x][y] := shape_line_width ;
+ endfor ;
+ endfor ;
+ endgroup ;
+enddef ;
+
+def scaled_to_grid =
+ xscaled grid_width yscaled grid_height
+enddef ;
+
+def xy_offset (expr x, y) =
+ (x+.5,y+.5)
+enddef ;
+
+def draw_shape (expr x, yy, p, sx, sy) =
+ begingroup ;
+ save y ;
+ y := y_pos(yy) ;
+ xypath [x][y] := (p xscaled sx yscaled sy) shifted xy_offset(x,y) ;
+ xyfree [x][y] := false ;
+ xysx [x][y] := sx ;
+ xysy [x][y] := sy ;
+ xyfill [x][y] := shape_fill_color ;
+ xydraw [x][y] := shape_line_color ;
+ xyline [x][y] := shape_line_width ;
+ xypeep [x][y] := peepshape ;
+ endgroup ;
+enddef ;
+
+vardef i_point (expr x, y, p, t) =
+ begingroup ;
+ save q, ok ;
+ pair q ;
+ boolean ok ;
+ q := xypath[x][y] intersection_point ((p) shifted xy_offset(x,y)) ;
+ ok := true ;
+% if xpart q < -.5 : ok := false ; q := (-.45,ypart q) fi ;
+% if xpart q > .5 : ok := false ; q := ( .45,ypart q) fi ;
+% if ypart q < -.5 : ok := false ; q := (xpart q,-.45) fi ;
+% if ypart q > .5 : ok := false ; q := (xpart q, .45) fi ;
+ if not ok :
+ message (t & " of shape (" & decimal x & "," & decimal y & ") limited") ;
+ fi ;
+ q
+ endgroup
+enddef ;
+
+vardef trimmed (expr x, y, z, t) =
+ if touchshape and t : xyline[x][y]/z else : epsilon fi
+enddef ;
+
+zfactor := 1/3 ;
+
+vardef xy_bottom (expr x, y, z, t) =
+ i_point (x, y, ((0,0)--(0,-2)) shifted (zfactor*z*xysx[x][y],0), "bottom")
+ shifted(0,-trimmed(x,y,grid_height,t))
+enddef ;
+
+vardef xy_top (expr x, y, z, t) =
+ i_point (x, y, ((0,0)--(0,2)) shifted (zfactor*z*xysx[x][y],0), "top")
+ shifted(0,trimmed(x,y,grid_height,t))
+enddef ;
+
+vardef xy_left (expr x, y, z, t) =
+ i_point (x, y, ((0,0)--(-2,0)) shifted (0,zfactor*z*xysy[x][y]), "left")
+ shifted(-trimmed(x,y,grid_width,t),0)
+enddef ;
+
+vardef xy_right (expr x, y, z, t) =
+ i_point (x, y, ((0,0)--(2,0)) shifted (0,zfactor*z*xysy[x][y]), "right")
+ shifted(trimmed(x,y,grid_width,t),0)
+enddef ;
+
+def flush_shapes =
+ for x=1 upto max_x :
+ for y=1 upto max_y :
+ flush_shape (x, y) ;
+ endfor ;
+ endfor ;
+enddef ;
+
+def draw_connection_point (expr x, y, z) =
+ pickup pencircle scaled if (z=0): 2 fi xyline[x][y] ;
+ drawdot xy_bottom(x,y,z,false) scaled_to_grid withcolor (1,0,0) ;
+ drawdot xy_top (x,y,z,false) scaled_to_grid withcolor (0,1,0) ;
+ drawdot xy_left (x,y,z,false) scaled_to_grid withcolor (0,0,1) ;
+ drawdot xy_right (x,y,z,false) scaled_to_grid withcolor (1,1,0) ;
+enddef ;
+
+def flush_shape (expr x, yy) =
+ begingroup ;
+ save y ;
+ y := y_pos(yy) ;
+ if not xyfree[x][y] :
+ pickup pencircle scaled xyline[x][y] ;
+ if xypeep[x][y] :
+ fill (xypath[x][y] peepholed (unitsquare shifted (x,y)))
+ scaled_to_grid withpen pencircle scaled 0
+ withcolor chart_background_color ;
+ else :
+ fill xypath[x][y] scaled_to_grid withcolor xyfill[x][y] ;
+ fi ;
+ draw xypath[x][y] scaled_to_grid withcolor xydraw[x][y] ;
+ if show_con_points or show_all_points :
+ draw_connection_point (x, y, 0) ;
+ fi ;
+ if show_all_points :
+ for i=-1 upto 1 :
+ draw_connection_point (x, y, i) ;
+ endfor ;
+ fi ;
+ fi ;
+ endgroup ;
+enddef ;
+
+vardef points_initialized (expr xfrom, yfrom, xto, yto, n) =
+ if not xyfree[xfrom][yfrom] and not xyfree[xto][yto] :
+ xypoint := n ; true
+ else :
+ xypoint := 0 ; false
+ fi
+enddef ;
+
+def collapse_points =
+ % remove redundant points
+ n := 1 ;
+ for i=2 upto xypoint:
+ if not (xypoints[i]=xypoints[n]) :
+ n := n + 1 ;
+ xypoints[n] := xypoints[i]
+ fi ;
+ endfor ;
+ xypoint := n ;
+ % make straight lines
+ if xypoints[2]=xypoints[xypoint-1] :
+ xypoints[3] := xypoints[xypoint] ;
+ xypoint := 3 ;
+ fi ;
+enddef ;
+
+vardef smoothed (expr a,b) =
+ sx := connection_smooth_size/grid_width ;
+ sy := connection_smooth_size/grid_height ;
+ if ypart a = ypart b :
+ a shifted (if xpart a >= xpart b : - fi sx,0)
+ else :
+ a shifted (0,if ypart a >= ypart b : - fi sy)
+ fi
+enddef ;
+
+vardef trim_points =
+ begingroup
+ save p, a, b, d, i ; path p ; pair d ;
+ p := for i=1 upto xypoint-1 : xypoints[i]-- endfor xypoints[xypoint] ;
+ if touchshape :
+ a := shape_line_width/grid_width ;
+ b := shape_line_width/grid_height ;
+ else :
+ a := epsilon ;
+ b := epsilon ;
+ fi ;
+ d := direction infinity of p ;
+ xypoints[xypoint] := xypoints[xypoint] shifted
+ if xpart d < 0 : (+a,0) ;
+ elseif xpart d > 0 : (-a,0) ;
+ elseif ypart d < 0 : (0,+b) ;
+ elseif ypart d > 0 : (0,-b) ;
+ else : origin ;
+ fi ;
+ d := direction 0 of p ;
+ xypoints[1] := xypoints[1] shifted
+ if xpart d < 0 : (-a,0) ;
+ elseif xpart d > 0 : (+a,0) ;
+ elseif ypart d < 0 : (0,-b) ;
+ elseif ypart d > 0 : (0,+b) ;
+ else : origin ;
+ fi ;
+ endgroup
+enddef ;
+
+vardef trim_points = enddef ;
+
+vardef connection_path =
+ if reverse_connection : reverse fi (xypoints[1]--
+ for i=2 upto xypoint-1 :
+ if smooth :
+ smoothed(xypoints[i],xypoints[i-1]) ..
+ controls xypoints[i] and xypoints[i] ..
+ smoothed(xypoints[i],xypoints[i+1]) --
+ else :
+ xypoints[i]--
+ fi
+ endfor
+ xypoints[xypoint])
+enddef ;
+
+def draw_connection =
+ if xypoint>0 :
+ collapse_points ;
+ trim_points ;
+ cpath := cpath + 1 ;
+ cpaths[cpath] := connection_path scaled_to_grid ;
+ cline[cpath] := connection_line_width ;
+ ccolor[cpath] := connection_line_color ;
+ carrow[cpath] := arrowtip ;
+ cdash[cpath] := dashline ;
+ ccross[cpath] := showcrossing ;
+ else :
+ message("no connection defined") ;
+ fi ;
+ reverse_connection := false ;
+enddef ;
+
+def flush_connections =
+ pair ip ;
+ boolean crossing ;
+ ahlength := connection_arrow_size ;
+ dash_pattern := dashpattern(on connection_dash_size off connection_dash_size ) ;
+ for i=1 upto cpath :
+ if ccross[i] :
+ crossing := false ;
+ for j=1 upto i :
+ %if not ((point infinity of cpaths[i] = point infinity of cpaths[j]) or
+ % (point 0 of cpaths[i] = point 0 of cpaths[j])) :
+ if not (point infinity of cpaths[i] = point infinity of cpaths[j]) :
+ ip := cpaths[i] intersection_point cpaths[j] ;
+ if intersection_found : crossing := true fi ;
+ fi ;
+ endfor ;
+ if crossing :
+ pickup pencircle scaled 2cline[i] ;
+% draw cpaths[i] withcolor chart_background_color ;
+path cp ; cp := cpaths[i] ;
+cp := cp cutbefore point .05 length cp of cp ;
+cp := cp cutafter point .95 length cp of cp ;
+draw cp withcolor chart_background_color ;
+ fi ;
+ fi ;
+ pickup pencircle scaled cline[i] ;
+ if carrow[i] :
+ if cdash[i] :
+ drawarrow cpaths[i] withcolor ccolor[i] dashed dash_pattern ;
+ else :
+ drawarrow cpaths[i] withcolor ccolor[i] ;
+ fi ;
+ else :
+ if cdash[i] :
+ draw cpaths[i] withcolor ccolor[i] dashed dash_pattern ;
+ else :
+ draw cpaths[i] withcolor ccolor[i] ;
+ fi ;
+ fi ;
+ draw_midpoint (i) ;
+ endfor ;
+enddef ;
+
+def draw_midpoint (expr n) =
+ begingroup
+ save p ;
+ pair p ;
+ p := point .5*length(cpaths[n]) of cpaths[n];
+ pickup pencircle scaled 2cline[n] ;
+ save_text_position (p) ;
+ if show_mid_points :
+ drawdot p withcolor .7white ;
+ fi ;
+ endgroup ;
+enddef ;
+
+boolean reverse_connection ; reverse_connection := false ;
+
+vardef up_on_grid (expr n) =
+ (xpart xypoints[n],(ypart xypoints[n]+1) div 1)
+enddef ;
+
+vardef down_on_grid (expr n) =
+ (xpart xypoints[n],(ypart xypoints[n]) div 1)
+enddef ;
+
+vardef left_on_grid (expr n) =
+ ((xpart xypoints[n]) div 1, ypart xypoints[n])
+enddef ;
+
+vardef right_on_grid (expr n) =
+ ((xpart xypoints[n]+1) div 1, ypart xypoints[n])
+enddef ;
+
+vardef x_on_grid (expr n, xfrom, xto, zfrom) =
+ if (xfrom=xto) and not (zfrom=0) :
+ if (zfrom=1) : right_on_grid(2) else : left_on_grid(2) fi
+ elseif xpart xypoints[1] < xpart xypoints[6] :
+ right_on_grid(n)
+ else :
+ left_on_grid(n)
+ fi
+enddef ;
+
+vardef y_on_grid (expr n, yfrom, yto, zfrom) =
+ if (yfrom=yto) and not (zfrom=0) :
+ if (zfrom=1) : up_on_grid(2) else : down_on_grid(2) fi
+ elseif ypart xypoints[1] < ypart xypoints[6] :
+ up_on_grid(n)
+ else :
+ down_on_grid(n)
+ fi
+enddef ;
+
+vardef xy_on_grid (expr n, m) =
+ (xpart xypoints[n], ypart xypoints[m])
+enddef ;
+
+vardef down_to_grid (expr a,b) =
+ (xpart xypoints[a],
+ ypart xypoints[if ypart xypoints[a]<ypart xypoints[b]:a else:b fi])
+enddef ;
+
+vardef up_to_grid (expr a,b) =
+ (xpart xypoints[a],
+ ypart xypoints[if ypart xypoints[a]>ypart xypoints[b]:a else:b fi])
+enddef ;
+
+vardef left_to_grid (expr a,b) =
+ (xpart xypoints[if xpart xypoints[a]<xpart xypoints[b]:a else:b fi],
+ ypart xypoints[a])
+enddef ;
+
+vardef right_to_grid (expr a,b) =
+ (xpart xypoints[if xpart xypoints[a]>xpart xypoints[b]:a else:b fi],
+ ypart xypoints[a])
+enddef ;
+
+vardef valid_connection (expr xfrom, yfrom, xto, yto) =
+ begingroup ;
+ save ok, vc, pp ;
+ boolean ok ;
+ % check for slanted lines
+ ok := true ;
+ for i=1 upto xypoint-1 :
+ if not ((xpart xypoints[i]=xpart xypoints[i+1]) or
+ (ypart xypoints[i]=ypart xypoints[i+1])) : ok := false ;
+ fi ;
+ endfor ;
+ if not ok :
+ %message("slanted");
+ false
+ elseif forcevalid :
+ %message("force");
+ true
+ elseif (xfrom=xto) and (yfrom=yto) :
+ %message("self");
+ false
+ else :
+ % check for crossing shapes
+ pair vc ;
+ path pp ;
+
+ pair xyfirst, xylast ;
+ xyfirst := xypoints[1] ;
+ xylast := xypoints[xypoint] ;
+ trim_points ;
+ pp := for i=1 upto xypoint-1 : xypoints[i]-- endfor xypoints[xypoint] ;
+ xypoints[1] := xyfirst ;
+ xypoints[xypoint] := xylast ;
+
+ for i=1 upto max_x :
+ for j=1 upto max_y :
+if not ( ( (i,j) = (xfrom,yfrom) ) or ( (i,j) = (yfrom,yto) ) ) :
+ if not xyfree[i][j] :
+ vc := pp intersection_point xypath[i][j] ;
+ if intersection_found : ok := false fi ;
+ fi ;
+fi ;
+ endfor ;
+ endfor ;
+ %if not ok: message("crossing") ; fi ;
+ ok
+ fi
+ endgroup
+enddef ;
+
+def connect_top_bottom (expr xfrom,yyfrom,zfrom) (expr xto,yyto,zto) =
+ yfrom := y_pos(yyfrom) ; yto := y_pos(yyto) ;
+ if points_initialized(xfrom,yfrom,xto,yto,6) :
+ xypoints[1] := xy_top(xfrom,yfrom,zfrom,true) ;
+ xypoints[6] := xy_bottom(xto,yto,zto,true) ;
+ xypoints[2] := up_on_grid(1) ;
+ xypoints[5] := down_on_grid(6) ;
+ xypoints[3] := up_to_grid(2,5) ;
+ xypoints[4] := up_to_grid(2,5) ;
+ if not valid_connection(xfrom,yfrom,xto,yto) :
+ xypoints[3] := x_on_grid(2,xfrom,xto,zfrom) ;
+ xypoints[4] := xy_on_grid(3,5) ;
+ fi ;
+ draw_connection ;
+ fi ;
+enddef ;
+
+def connect_left_right (expr xfrom,yyfrom,zfrom) (expr xto,yyto,zto) =
+ yfrom := y_pos(yyfrom) ; yto := y_pos(yyto) ;
+ if points_initialized(xfrom,yfrom,xto,yto,6) :
+ xypoints[1] := xy_left(xfrom,yfrom,zfrom,true) ;
+ xypoints[6] := xy_right(xto,yto,zto,true) ;
+ xypoints[2] := left_on_grid(1) ;
+ xypoints[5] := right_on_grid(6) ;
+ xypoints[3] := left_to_grid(2,5) ;
+ xypoints[4] := left_to_grid(2,5) ;
+ if not valid_connection(xfrom,yfrom,xto,yto) :
+ xypoints[3] := y_on_grid(2,yfrom,yto,zfrom) ;
+ xypoints[4] := xy_on_grid(5,3) ;
+ fi ;
+ draw_connection ;
+ fi ;
+enddef ;
+
+def connect_left_top (expr xfrom,yyfrom,zfrom) (expr xto,yyto,zto) =
+ yfrom := y_pos(yyfrom) ; yto := y_pos(yyto) ;
+ if points_initialized(xfrom,yfrom,xto,yto,5) :
+ xypoints[1] := xy_left(xfrom,yfrom,zfrom,true) ;
+ xypoints[5] := xy_top(xto,yto,zto,true) ;
+ xypoints[2] := left_on_grid(1) ;
+ xypoints[4] := up_on_grid(5) ;
+ xypoints[3] := left_to_grid(2,5) ;
+ if not valid_connection(xfrom,yfrom,xto,yto) :
+ xypoints[3] := xy_on_grid(2,4) ;
+ fi ;
+ draw_connection ;
+ fi ;
+enddef ;
+
+def connect_left_bottom (expr xfrom,yyfrom,zfrom) (expr xto,yyto,zto) =
+ yfrom := y_pos(yyfrom) ; yto := y_pos(yyto) ;
+ if points_initialized(xfrom,yfrom,xto,yto,5) :
+ xypoints[1] := xy_left(xfrom,yfrom,zfrom,true) ;
+ xypoints[5] := xy_bottom(xto,yto,zto,true) ;
+ xypoints[2] := left_on_grid(1) ;
+ xypoints[4] := down_on_grid(5) ;
+ xypoints[3] := left_to_grid(2,5) ;
+ if not valid_connection(xfrom,yfrom,xto,yto) :
+ xypoints[3] := xy_on_grid(2,4) ;
+ fi ;
+ draw_connection ;
+ fi ;
+enddef ;
+
+def connect_right_top (expr xfrom,yyfrom,zfrom) (expr xto,yyto,zto) =
+ yfrom := y_pos(yyfrom) ; yto := y_pos(yyto) ;
+ if points_initialized(xfrom,yfrom,xto,yto,5) :
+ xypoints[1] := xy_right(xfrom,yfrom,zfrom,true) ;
+ xypoints[5] := xy_top(xto,yto,zto,true) ;
+ xypoints[2] := right_on_grid(1) ;
+ xypoints[4] := up_on_grid(5) ;
+ xypoints[3] := right_to_grid(2,5) ;
+ if not valid_connection(xfrom,yfrom,xto,yto) :
+ xypoints[3] := xy_on_grid(2,4) ;
+ fi ;
+ draw_connection ;
+ fi ;
+enddef ;
+
+def connect_right_bottom (expr xfrom,yyfrom,zfrom) (expr xto,yyto,zto) =
+ yfrom := y_pos(yyfrom) ; yto := y_pos(yyto) ;
+ if points_initialized(xfrom,yfrom,xto,yto,5) :
+ xypoints[1] := xy_right(xfrom,yfrom,zfrom,true) ;
+ xypoints[5] := xy_bottom(xto,yto,zto,true) ;
+ xypoints[2] := right_on_grid(1) ;
+ xypoints[4] := down_on_grid(5) ;
+ xypoints[3] := right_to_grid(2,5) ;
+ if not valid_connection(xfrom,yfrom,xto,yto) :
+ xypoints[3] := xy_on_grid(2,4) ;
+ fi ;
+ draw_connection ;
+ fi ;
+enddef ;
+
+def connect_left_left (expr xfrom,yyfrom,zfrom) (expr xto,yyto,zto) =
+ yfrom := y_pos(yyfrom) ; yto := y_pos(yyto) ;
+ if points_initialized(xfrom,yfrom,xto,yto,6) :
+ xypoints[1] := xy_left(xfrom,yfrom,zfrom,true) ;
+ xypoints[6] := xy_left(xto,yto,zto,true) ;
+ xypoints[2] := left_on_grid(1) ;
+ xypoints[5] := left_on_grid(6) ;
+ xypoints[3] := left_to_grid(2,5) ;
+ xypoints[4] := left_to_grid(5,2) ;
+ if not valid_connection(xfrom,yfrom,xto,yto) :
+ xypoints[3] := y_on_grid(2,yfrom,yto,zfrom) ;
+ xypoints[4] := xy_on_grid(5,3) ;
+ fi ;
+ draw_connection ;
+ fi ;
+enddef ;
+
+def connect_right_right (expr xfrom,yyfrom,zfrom) (expr xto,yyto,zto) =
+ yfrom := y_pos(yyfrom) ; yto := y_pos(yyto) ;
+ if points_initialized(xfrom,yfrom,xto,yto,6) :
+ xypoints[1] := xy_right(xfrom,yfrom,zfrom,true) ;
+ xypoints[6] := xy_right(xto,yto,zto,true) ;
+ xypoints[2] := right_on_grid(1) ;
+ xypoints[5] := right_on_grid(6) ;
+ xypoints[3] := right_to_grid(2,5) ;
+ xypoints[4] := right_to_grid(5,2) ;
+ if not valid_connection(xfrom,yfrom,xto,yto) :
+ xypoints[3] := y_on_grid(2,yfrom,yto,zfrom) ;
+ xypoints[4] := xy_on_grid(5,3) ;
+ fi ;
+ draw_connection ;
+ fi ;
+enddef ;
+
+def connect_top_top (expr xfrom,yyfrom,zfrom) (expr xto,yyto,zto) =
+ yfrom := y_pos(yyfrom) ; yto := y_pos(yyto) ;
+ if points_initialized(xfrom,yfrom,xto,yto,6) :
+ xypoints[1] := xy_top(xfrom,yfrom,zfrom,true) ;
+ xypoints[6] := xy_top(xto,yto,zto,true) ;
+ xypoints[2] := up_on_grid(1) ;
+ xypoints[5] := up_on_grid(6) ;
+ xypoints[3] := up_to_grid(2,5) ;
+ xypoints[4] := up_to_grid(5,2) ;
+ if not valid_connection(xfrom,yfrom,xto,yto) :
+ xypoints[3] := x_on_grid(2,xfrom,xto,zfrom) ;
+ xypoints[4] := xy_on_grid(3,5) ;
+ fi ;
+ draw_connection ;
+ fi ;
+enddef ;
+
+def connect_bottom_bottom (expr xfrom,yyfrom,zfrom) (expr xto,yyto,zto) =
+ yfrom := y_pos(yyfrom) ; yto := y_pos(yyto) ;
+ if points_initialized(xfrom,yfrom,xto,yto,6) :
+ xypoints[1] := xy_bottom(xfrom,yfrom,zfrom,true) ;
+ xypoints[6] := xy_bottom(xto,yto,zto,true) ;
+ xypoints[2] := down_on_grid(1) ;
+ xypoints[5] := down_on_grid(6) ;
+ xypoints[3] := down_to_grid(2,5) ;
+ xypoints[4] := down_to_grid(5,2) ;
+ if not valid_connection(xfrom,yfrom,xto,yto) :
+ xypoints[3] := x_on_grid(2,xfrom,xto,zfrom) ;
+ xypoints[4] := xy_on_grid(3,5) ;
+ fi ;
+ draw_connection ;
+ fi ;
+enddef ;
+
+def connect_bottom_top (expr xfrom,yfrom,zfrom) (expr xto,yto,zto) =
+ reverse_connection := true ;
+ connect_top_bottom (xto,yto,zto) (xfrom,yfrom,zfrom) ;
+enddef ;
+
+def connect_right_left (expr xfrom,yfrom,zfrom) (expr xto,yto,zto) =
+ reverse_connection := true ;
+ connect_left_right (xto,yto,zto) (xfrom,yfrom,zfrom) ;
+enddef ;
+
+def connect_top_left (expr xfrom,yfrom,zfrom) (expr xto,yto,zto) =
+ reverse_connection := true ;
+ connect_left_top (xto,yto,zto) (xfrom,yfrom,zfrom) ;
+enddef ;
+
+def connect_bottom_left (expr xfrom,yfrom,zfrom) (expr xto,yto,zto) =
+ reverse_connection := true ;
+ connect_left_bottom (xto,yto,zto) (xfrom,yfrom,zfrom) ;
+enddef ;
+
+def connect_top_right (expr xfrom,yfrom,zfrom) (expr xto,yto,zto) =
+ reverse_connection := true ;
+ connect_right_top (xto,yto,zto) (xfrom,yfrom,zfrom) ;
+enddef ;
+
+def connect_bottom_right (expr xfrom,yfrom,zfrom) (expr xto,yto,zto) =
+ reverse_connection := true ;
+ connect_right_bottom (xto,yto,zto) (xfrom,yfrom,zfrom) ;
+enddef ;
+
+def draw_test_shape (expr x, y) =
+ draw_shape(x,y,fullcircle, .7, .7) ;
+enddef ;
+
+def draw_test_shapes =
+ for i=1 upto max_x :
+ for j=1 upto max_y :
+ draw_test_shape(i,j) ;
+ endfor ;
+ endfor ;
+enddef;
+
+def draw_test_area =
+ pickup pencircle scaled .5shape_line_width ;
+ draw (unitsquare xscaled max_x yscaled max_y shifted (1,1))
+ scaled_to_grid withcolor blue ;
+enddef ;
+
+def show_connection (expr n, m) =
+
+ begin_chart(100+n,6,6) ;
+
+ draw_test_area ;
+
+ smooth := true ;
+ arrowtip := true ;
+ dashline := true ;
+
+ draw_test_shape(2,2) ; draw_test_shape(4,5) ;
+ draw_test_shape(3,3) ; draw_test_shape(5,1) ;
+ draw_test_shape(2,5) ; draw_test_shape(1,3) ;
+ draw_test_shape(6,2) ; draw_test_shape(4,6) ;
+
+ if (m=1) :
+ connect_top_bottom (2,2,0) (4,5,0) ;
+ connect_top_bottom (3,3,0) (5,1,0) ;
+ connect_top_bottom (2,5,0) (1,3,0) ;
+ connect_top_bottom (6,2,0) (4,6,0) ;
+ elseif (m=2) :
+ connect_top_top (2,2,0) (4,5,0) ;
+ connect_top_top (3,3,0) (5,1,0) ;
+ connect_top_top (2,5,0) (1,3,0) ;
+ connect_top_top (6,2,0) (4,6,0) ;
+ elseif (m=3) :
+ connect_bottom_bottom (2,2,0) (4,5,0) ;
+ connect_bottom_bottom (3,3,0) (5,1,0) ;
+ connect_bottom_bottom (2,5,0) (1,3,0) ;
+ connect_bottom_bottom (6,2,0) (4,6,0) ;
+ elseif (m=4) :
+ connect_left_right (2,2,0) (4,5,0) ;
+ connect_left_right (3,3,0) (5,1,0) ;
+ connect_left_right (2,5,0) (1,3,0) ;
+ connect_left_right (6,2,0) (4,6,0) ;
+ elseif (m=5) :
+ connect_left_left (2,2,0) (4,5,0) ;
+ connect_left_left (3,3,0) (5,1,0) ;
+ connect_left_left (2,5,0) (1,3,0) ;
+ connect_left_left (6,2,0) (4,6,0) ;
+ elseif (m=6) :
+ connect_right_right (2,2,0) (4,5,0) ;
+ connect_right_right (3,3,0) (5,1,0) ;
+ connect_right_right (2,5,0) (1,3,0) ;
+ connect_right_right (6,2,0) (4,6,0) ;
+ elseif (m=7) :
+ connect_left_top (2,2,0) (4,5,0) ;
+ connect_left_top (3,3,0) (5,1,0) ;
+ connect_left_top (2,5,0) (1,3,0) ;
+ connect_left_top (6,2,0) (4,6,0) ;
+ elseif (m=8) :
+ connect_left_bottom (2,2,0) (4,5,0) ;
+ connect_left_bottom (3,3,0) (5,1,0) ;
+ connect_left_bottom (2,5,0) (1,3,0) ;
+ connect_left_bottom (6,2,0) (4,6,0) ;
+ elseif (m=9) :
+ connect_right_top (2,2,0) (4,5,0) ;
+ connect_right_top (3,3,0) (5,1,0) ;
+ connect_right_top (2,5,0) (1,3,0) ;
+ connect_right_top (6,2,0) (4,6,0) ;
+ else :
+ connect_right_bottom (2,2,0) (4,5,0) ;
+ connect_right_bottom (3,3,0) (5,1,0) ;
+ connect_right_bottom (2,5,0) (1,3,0) ;
+ connect_right_bottom (6,2,0) (4,6,0) ;
+ fi ;
+
+ end_chart ;
+
+enddef ;
+
+def show_connections =
+ for f=1 upto 10 :
+ show_connection(f,f) ;
+ endfor ;
+enddef ;
+
+%D charts
+
+def clip_chart (expr minx, miny, maxx, maxy) =
+ cmin_x := minx ;
+ cmax_x := maxx ;
+ cmin_y := miny ;
+ cmax_y := maxy ;
+enddef ;
+
+def begin_chart (expr n, maxx, maxy) =
+ chart_figure := n ;
+ chart_scale := 1 ;
+ if chart_figure>0: beginfig(chart_figure) ; fi ;
+ initialize_grid (maxx, maxy) ;
+ bboxmargin := 0 ;
+ cmin_x := 1 ;
+ cmax_x := maxx ;
+ cmin_y := 1 ;
+ cmax_y := maxy ;
+enddef ;
+
+def end_chart =
+ flush_shapes ;
+ flush_connections ;
+ cmin_x := cmin_x ;
+ cmax_x := cmin_x+cmax_x ;
+ cmin_y := cmin_y-1 ;
+ cmax_y := cmin_y+cmax_y ;
+ if reverse_y :
+ cmin_y := y_pos(cmin_y) ;
+ cmax_y := y_pos(cmax_y) ;
+ fi ;
+ path p ;
+ p := (((cmin_x,cmin_y)--(cmax_x,cmin_y)--
+ (cmax_x,cmax_y)--(cmin_x,cmax_y)--cycle))
+ scaled_to_grid ;
+ %draw p withcolor red ;
+ p := enlarged_path (p,chart_offset) ;
+ clip currentpicture to p ;
+ setbounds currentpicture to p ;
+ savedata
+ "\MPclippath{" &
+ decimal xpart llcorner p & "}{" &
+ decimal ypart llcorner p & "}{" &
+ decimal xpart urcorner p & "}{" &
+ decimal ypart urcorner p & "}" ;
+ savedata
+ "\MPareapath{" &
+ decimal (xpart llcorner p + 2chart_offset) & "}{" &
+ decimal (ypart llcorner p + 2chart_offset) & "}{" &
+ decimal (xpart urcorner p - 2chart_offset) & "}{" &
+ decimal (ypart urcorner p - 2chart_offset) & "}" ;
+ currentpicture := currentpicture scaled chart_scale ;
+ if chart_figure>0: endfig ; fi ;
+enddef ;
+
+def new_shape (expr x, y, n) =
+ if known n :
+ if (x>0) and (x<=max_x) and (y>0) and (y<=max_y) :
+ sx := shape_width/grid_width ;
+ sy := shape_height/grid_height ;
+ draw_shape(x,y,some_shape_path(n), sx, sy) ;
+ else :
+ message ("shape outside grid ignored") ;
+ fi ;
+ else
+ message ("shape not known" ) ;
+ fi ;
+enddef ;
+
+def begin_sub_chart =
+ begingroup ;
+ save shape_line_width , connection_line_width ;
+ save shape_line_color, shape_fill_color, connection_line_color ;
+ color shape_line_color, shape_fill_color, connection_line_color ;
+ save smooth, arrowtip, dashline, peepshape ;
+ boolean smooth, arrowtip, dashline, peepshape ;
+enddef ;
+
+def end_sub_chart =
+ endgroup ;
+enddef ;
+
+%D done
+
+endinput ;
+
+%D testing
+
+show_shapes(100) ;
+
+end
+
+%D more testing
+
+show_connections ;
+
+begin_chart (1,4,5) ;
+ %clip_chart(1,1,1,2) ;
+ new_shape (1,1,31) ;
+ new_shape (1,2,3) ;
+ new_shape (4,4,5) ;
+ connect_top_left (1,1,0) (4,4,0) ;
+ connect_bottom_top (1,2,0) (4,4,0) ;
+ connect_left_right (1,2,0) (1,1,0) ;
+end_chart ;
+
+end
diff --git a/metapost/context/mp-core.mp b/metapost/context/mp-core.mp
new file mode 100644
index 000000000..d4045d3da
--- /dev/null
+++ b/metapost/context/mp-core.mp
@@ -0,0 +1,232 @@
+%D \module
+%D [ file=mp-core.mp,
+%D version=1999.08.12,
+%D title=\CONTEXT\ \METAPOST\ graphics,
+%D subtitle=core interfacing,
+%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 unknown context_tool : input mp-tool ; fi ;
+if known context_core : endinput ; fi ;
+
+boolean context_core ; context_core := true ;
+
+pair lxy[], rxy[], cxy[], llxy[], lrxy[], ulxy[], urxy[] ;
+path pxy[] ;
+numeric hxy[], wxy[], dxy[], nxy[] ;
+
+def box_found (expr n,x,y,w,h,d) =
+ not ((x=0) and (y=0) and (w=0) and (h=0) and (d=0))
+enddef ;
+
+def initialize_box_pos (expr pos,n,x,y,w,h,d) =
+ pair lxy, rxy, cxy, llxy, lrxy, ulxy, urxy ;
+ path pxy ; numeric hxy, wxy, dxy, nxy;
+ lxy := (x,y) ; lxy[pos] := lxy ;
+ llxy := (x,y-d) ; llxy[pos] := llxy ;
+ lrxy := (x+w,y-d) ; lrxy[pos] := lrxy ;
+ urxy := (x+w,y+h) ; urxy[pos] := urxy ;
+ ulxy := (x,y+h) ; ulxy[pos] := ulxy ;
+ wxy := w ; wxy[pos] := wxy ;
+ hxy := h ; hxy[pos] := hxy ;
+ dxy := d ; dxy[pos] := dxy ;
+ rxy := lxy shifted (wxy,0) ; rxy[pos] := rxy ;
+ pxy := llxy--lrxy--urxy--ulxy--cycle ; pxy[pos] := pxy ;
+ cxy := center pxy ; cxy[pos] := cxy ;
+ nxy := n ; nxy[pos] := nxy ;
+enddef ;
+
+def initialize_box (expr n,x,y,w,h,d) =
+
+ numeric bpos ; bpos := 0 ; initialize_box_pos(bpos,n,x,y,w,h,d) ;
+
+enddef ;
+
+def initialize_area (expr fn,fx,fy,fw,fh,fd,
+ tn,tx,ty,tw,th,td) =
+
+ numeric fpos ; fpos := 1 ; initialize_box_pos(fpos,fn,fx,fy,fw,fh,fd) ;
+ numeric tpos ; tpos := 2 ; initialize_box_pos(tpos,tn,tx,ty,tw,th,td) ;
+
+ do_initialize_area (fpos, tpos) ;
+
+enddef ;
+
+def do_initialize_area (expr fpos, tpos) =
+ lxy := lxy[fpos] ;
+ llxy := (xpart llxy[fpos], ypart llxy[tpos]) ;
+ lrxy := lrxy[tpos] ;
+ urxy := (xpart urxy[tpos], ypart urxy[fpos]) ;
+ ulxy := ulxy[fpos] ;
+ wxy := xpart lrxy - xpart llxy ;
+ hxy := hxy[fpos] ;
+ dxy := dxy[tpos] ;
+ rxy := lxy shifted (wxy,0) ;
+ pxy := llxy--lrxy--urxy--ulxy--cycle ;
+ cxy := center pxy ;
+enddef ;
+
+def initialize_par (expr fn,fx,fy,fw,fh,fd, ln,lx,ly,lw,lh,ld,
+ rn,rx,ry,rw,rh,rd, tn,tx,ty,tw,th,td) =
+
+ numeric fpos ; fpos := 1 ; initialize_box_pos(fpos,fn,fx,fy,fw,fh,fd) ;
+ numeric lpos ; lpos := 3 ; initialize_box_pos(lpos,ln,lx,ly,lw,lh,ld) ;
+ numeric rpos ; rpos := 4 ; initialize_box_pos(rpos,rn,rx,ry,rw,rh,rd) ;
+ numeric tpos ; tpos := 2 ; initialize_box_pos(tpos,tn,tx,ty,tw,th,td) ;
+
+ do_initialize_area (fpos, tpos) ;
+ do_initialize_par (fpos, lpos, rpos, tpos) ;
+
+enddef ;
+
+def do_initialize_par (expr fpos, lpos, rpos, tpos) =
+
+ pair leftxy, righxy ; path txy, mxy, bxy ; % top mid bot
+
+ leftxy := if xpart ulxy[fpos] > xpart ulxy[lpos] : ulxy[fpos] else : ulxy[lpos] fi ;
+ righxy := if xpart urxy[tpos] < xpart urxy[rpos] : urxy[tpos] else : urxy[rpos] fi ;
+
+ pxy := origin ;
+
+ if (round(ypart llxy[fpos]) = round(ypart ulxy[tpos])) and
+ (round(xpart lrxy[tpos]) < round(xpart llxy[fpos])) :
+
+ txy := llxy[fpos] -- (xpart lrxy[rpos], ypart lrxy[fpos]) --
+ (xpart urxy[rpos], ypart urxy[fpos]) -- ulxy[fpos] -- cycle ;
+ mxy := origin ;
+ bxy := (xpart llxy[lpos], ypart llxy[tpos]) -- lrxy[tpos] --
+ urxy[tpos] -- (xpart ulxy[lpos], ypart ulxy[tpos]) -- cycle ;
+
+ elseif ypart llxy[fpos] = ypart llxy[tpos] :
+
+ txy := llxy[fpos] -- lrxy[tpos] -- urxy[tpos] -- ulxy[fpos] --cycle ;
+ mxy := origin ;
+ bxy := origin ;
+
+ else :
+
+ txy := (xpart lrxy[rpos], ypart lrxy[fpos]) --
+ (xpart urxy[rpos], ypart urxy[fpos]) --
+ ulxy[fpos] -- llxy[fpos] -- cycle ;
+ mxy := (xpart llxy[lpos], ypart ulxy[tpos]) --
+ (xpart llxy[rpos], ypart ulxy[tpos]) --
+ (xpart lrxy[rpos], ypart lrxy[fpos]) --
+ (xpart llxy[lpos], ypart llxy[fpos]) -- cycle ;
+ bxy := (xpart llxy[lpos], ypart llxy[tpos]) --
+ (xpart righxy, ypart lrxy[tpos]) --
+ (xpart righxy, ypart urxy[tpos]) --
+ (xpart llxy[lpos], ypart ulxy[tpos]) -- cycle ;
+
+ if (round(point 0 of bxy) = round(point 1 of bxy)) or
+ (round(point 0 of bxy) = round(point 2 of bxy)) :
+ bxy := origin ;
+ fi ;
+
+ if (round(point 0 of mxy) = round(point 1 of mxy)) or
+ (round(point 0 of mxy) = round(point 2 of mxy)) :
+ mxy := origin ;
+ fi ;
+
+ if (round(point 0 of txy) = round(point 1 of txy)) or
+ (round(point 0 of txy) = round(point 2 of txy)) :
+ txy := origin ;
+ fi ;
+
+ if (round (length(mxy)) > 1) :
+ if (round (length(txy)) < 2) :
+ if (round (length(bxy)) < 2) :
+ pxy := mxy ;
+ else :
+ pxy := point 0 of bxy -- point 1 of bxy -- point 2 of bxy --
+ point 1 of mxy -- point 2 of mxy -- point 3 of mxy --
+ cycle ;
+ fi ;
+ else :
+ if (round (length(bxy)) < 2) :
+ pxy := point 1 of mxy --
+ point 1 of txy -- point 2 of txy -- point 3 of txy --
+ point 3 of mxy -- point 0 of mxy --
+ cycle ;
+ else :
+ pxy := point 1 of mxy --
+ point 1 of txy -- point 2 of txy -- point 3 of txy --
+ point 3 of mxy --
+ point 0 of bxy -- point 1 of bxy -- point 2 of bxy --
+ cycle ;
+ fi ;
+ fi ;
+ fi ;
+
+ fi ;
+
+enddef ;
+
+color boxfillcolor ; boxfillcolor := .8white ;
+color boxlinecolor ; boxlinecolor := .8blue ;
+
+def draw_box =
+ pickup pencircle scaled .5 ;
+ draw pxy withcolor boxlinecolor ;
+ draw lxy -- rxy withcolor boxlinecolor ;
+% pickup pencircle scaled 1.5 ;
+% draw llxy withcolor green ;
+% draw lrxy withcolor green ;
+% draw urxy withcolor green ;
+% draw ulxy withcolor green ;
+% draw cxy withcolor red ;
+% pickup pencircle scaled 1 ;
+% draw lxy withcolor red ;
+% draw rxy withcolor red ;
+enddef ;
+
+def draw_par =
+ pickup pencircle scaled .5 ;
+ if length pxy > 1 :
+ fill pxy withcolor boxfillcolor ; draw pxy withcolor boxlinecolor ;
+ else :
+ draw_par_top ; draw_par_mid ; draw_par_bot ;
+ fi ;
+% pickup pencircle scaled 1.5 ;
+% draw llxy[lpos] withcolor red ;
+% draw llxy[rpos] withcolor red ;
+% draw llxy[tpos] withcolor green ;
+% draw llxy[fpos] withcolor green ;
+enddef ;
+
+def draw_par_top =
+ pickup pencircle scaled .5 ;
+ if length txy > 1 :
+ fill txy withcolor boxfillcolor ; draw txy withcolor boxlinecolor ;
+ fi ;
+enddef ;
+
+def draw_par_mid =
+ pickup pencircle scaled .5 ;
+ if length mxy > 1 :
+ fill mxy withcolor boxfillcolor ; draw mxy withcolor boxlinecolor ;
+ fi ;
+enddef ;
+
+def draw_par_bot =
+ pickup pencircle scaled .5 ;
+ if length bxy > 1 :
+ fill bxy withcolor boxfillcolor ; draw bxy withcolor boxlinecolor ;
+ fi ;
+enddef ;
+
+def anchor_box (expr n,x,y,w,h,d) =
+% bboxmargin := 0 ;
+% setbounds currentpicture to unitsquare shifted (x,y) ;
+ currentpicture := currentpicture shifted (-x,-y) ;
+enddef ;
+
+let draw_area = draw_box ;
+let anchor_area = anchor_box ;
+let anchor_par = anchor_box ;
+
+endinput ;
diff --git a/metapost/context/mp-page.mp b/metapost/context/mp-page.mp
new file mode 100644
index 000000000..7133ae6ff
--- /dev/null
+++ b/metapost/context/mp-page.mp
@@ -0,0 +1,218 @@
+%D \module
+%D [ file=mp-page.mp,
+%D version=1999.03.10,
+%D title=\CONTEXT\ \METAPOST\ graphics,
+%D subtitle=page enhancements,
+%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 mreadme.pdf for
+%C details.
+
+%D This module is rather preliminary and subjected to
+%D changes.
+
+if unknown context_tool : input mp-tool ; fi ;
+if known context_page : endinput ; fi ;
+
+boolean context_page ; context_page := true ;
+
+if unknown PageStateAvailable :
+ boolean PageStateAvailable ; PageStateAvailable := false ;
+fi ;
+
+if unknown OnRightPage :
+ boolean OnRightPage ; OnRightPage := true ;
+fi ;
+
+PageNumber := 0 ;
+PaperHeight := 845.04684pt ;
+PaperWidth := 597.50787pt ;
+PrintPaperHeight := 845.04684pt ;
+PrintPaperWidth := 597.50787pt ;
+TopSpace := 71.12546pt ;
+BackSpace := 71.13275pt ;
+MakeupHeight := 711.3191pt ;
+MakeupWidth := 426.78743pt ;
+TopHeight := 0.0pt ;
+TopDistance := 0.0pt ;
+HeaderHeight := 56.90294pt ;
+HeaderDistance := 0.0pt ;
+TextHeight := 597.51323pt ;
+FooterDistance := 0.0pt ;
+FooterHeight := 56.90294pt ;
+BottomDistance := 0.0pt ;
+BottomHeight := 0.0pt ;
+LeftEdgeWidth := 0.0pt ;
+LeftEdgeDistance := 0.0pt ;
+LeftMarginWidth := 75.58197pt ;
+LeftMarginDistance := 11.99829pt ;
+TextWidth := 426.78743pt ;
+RightMarginDistance := 11.99829pt ;
+RightMarginWidth := 75.58197pt ;
+RightEdgeDistance := 0.0pt ;
+RightEdgeWidth := 0.0pt ;
+
+PageOffset := 0.0pt ;
+PageDepth := 0.0pt ;
+
+LeftEdge := -4 ; Top := -40 ;
+LeftEdgeSeparator := -3 ; TopSeparator := -30 ;
+LeftMargin := -2 ; Header := -20 ;
+LeftMarginSeparator := -1 ; HeaderSeparator := -10 ;
+Text := 0 ; Text := 0 ;
+RightMarginSeparator := +1 ; FooterSeparator := +10 ;
+RightMargin := +2 ; Footer := +20 ;
+RightEdgeSeparator := +3 ; BottomSeparator := +30 ;
+RightEdge := +4 ; Bottom := +40 ;
+
+Margin := LeftMargin ;
+Edge := LeftEdge ;
+InnerMargin := RightMargin ;
+InnerEdge := RightEdge ;
+OuterMargin := LeftMargin ;
+OuterEdge := LeftEdge ;
+
+path Area [][] ; pair Location [][] ; path Field [][] ; path Page ;
+numeric HorPos ; numeric Hstep [] ; numeric Hsize [] ;
+numeric VerPos ; numeric Vstep [] ; numeric Vsize [] ;
+
+for VerPos=Top step 10 until Bottom:
+ for HorPos=LeftEdge step 1 until RightEdge:
+ Area[HorPos][VerPos] := origin--cycle ;
+ Area[VerPos][HorPos] := Area[HorPos][VerPos] ;
+ Location[HorPos][VerPos] := origin ;
+ Location[VerPos][HorPos] := Location[HorPos][VerPos] ;
+ Field[HorPos][VerPos] := origin--cycle ;
+ Field[VerPos][HorPos] := Field[HorPos][VerPos] ;
+ endfor ;
+endfor ;
+
+% def LoadPageState =
+% scantokens "input mp-state.tmp" ;
+% enddef ;
+
+def SwapPageState =
+ if not OnRightPage :
+ BackSpace := PaperWidth-MakeupWidth-BackSpace ;
+ i := LeftMarginWidth ;
+ LeftMarginWidth := RightMarginWidth ;
+ RightMarginWidth := i ;
+ i := LeftMarginDistance ;
+ LeftMarginDistance := RightMarginDistance ;
+ RightMarginDistance := i ;
+ i := LeftEdgeWidth ;
+ LeftEdgeWidth := RightEdgeWidth ;
+ RightEdgeWidth := i ;
+ i := LeftEdgeDistance ;
+ LeftEdgeDistance := RightEdgeDistance ;
+ RightEdgeDistance := i ;
+
+ Margin := LeftMargin ;
+ Edge := LeftEdge ;
+ InnerMargin := RightMargin ;
+ InnerEdge := RightEdge ;
+ OuterMargin := LeftMargin ;
+ OuterEdge := LeftEdge ;
+ else :
+ Margin := RightMargin ;
+ Edge := RightEdge ;
+ InnerMargin := LeftMargin ;
+ InnerEdge := LeftEdge ;
+ OuterMargin := RightMargin ;
+ OuterEdge := RightEdge ;
+ fi ;
+enddef ;
+
+def StartPage =
+
+ if PageStateAvailable :
+ LoadPageState ;
+ SwapPageState ;
+ fi ;
+
+ numeric Vsize[], Hsize[], Vstep[], Hstep[] ;
+
+ Vsize[Top] = TopHeight ;
+ Vsize[TopSeparator] = TopDistance ;
+ Vsize[Header] = HeaderHeight ;
+ Vsize[HeaderSeparator] = HeaderDistance ;
+ Vsize[Text] = TextHeight ;
+ Vsize[FooterSeparator] = FooterDistance ;
+ Vsize[Footer] = FooterHeight ;
+ Vsize[BottomSeparator] = BottomDistance ;
+ Vsize[Bottom] = BottomHeight ;
+
+ Vstep[Top] = Vstep[TopSeparator] +Vsize[TopSeparator] ;
+ Vstep[TopSeparator] = PaperHeight-TopSpace ;
+ Vstep[Header] = Vstep[TopSeparator] -Vsize[Header] ;
+ Vstep[HeaderSeparator] = Vstep[Header] -Vsize[HeaderSeparator] ;
+ Vstep[Text] = Vstep[HeaderSeparator]-Vsize[Text] ;
+ Vstep[FooterSeparator] = Vstep[Text] -Vsize[FooterSeparator] ;
+ Vstep[Footer] = Vstep[FooterSeparator]-Vsize[Footer] ;
+ Vstep[BottomSeparator] = Vstep[Footer] -Vsize[BottomSeparator] ;
+ Vstep[Bottom] = Vstep[BottomSeparator]-Vsize[Bottom] ;
+
+ Hsize[LeftEdge] = LeftEdgeWidth ;
+ Hsize[LeftEdgeSeparator] = LeftEdgeDistance ;
+ Hsize[LeftMargin] = LeftMarginWidth ;
+ Hsize[LeftMarginSeparator] = LeftMarginDistance ;
+ Hsize[Text] = MakeupWidth ;
+ Hsize[RightMarginSeparator] = RightMarginDistance ;
+ Hsize[RightMargin] = RightMarginWidth ;
+ Hsize[RightEdgeSeparator] = RightEdgeDistance ;
+ Hsize[RightEdge] = RightEdgeWidth ;
+
+ Hstep[LeftEdge] = Hstep[LeftEdgeSeparator] -Hsize[LeftEdge] ;
+ Hstep[LeftEdgeSeparator] = Hstep[LeftMargin] -Hsize[LeftEdgeSeparator] ;
+ Hstep[LeftMargin] = Hstep[LeftMarginSeparator] -Hsize[LeftMargin] ;
+ Hstep[LeftMarginSeparator] = Hstep[Text] -Hsize[LeftMarginSeparator] ;
+ Hstep[Text] = BackSpace ;
+ Hstep[RightMarginSeparator] = Hstep[Text] +Hsize[Text] ;
+ Hstep[RightMargin] = Hstep[RightMarginSeparator]+Hsize[RightMarginSeparator] ;
+ Hstep[RightEdgeSeparator] = Hstep[RightMargin] +Hsize[RightMargin] ;
+ Hstep[RightEdge] = Hstep[RightEdgeSeparator] +Hsize[RightEdgeSeparator] ;
+
+ for VerPos=Top step 10 until Bottom:
+ for HorPos=LeftEdge step 1 until RightEdge:
+ Area[HorPos][VerPos] := unitsquare xscaled Hsize[HorPos] yscaled Vsize[VerPos] ;
+ Area[VerPos][HorPos] := Area[HorPos][VerPos] ;
+ Location[HorPos][VerPos] := (Hstep[HorPos],Vstep[VerPos]) ;
+ Location[VerPos][HorPos] := Location[HorPos][VerPos] ;
+ Field[HorPos][VerPos] := Area[HorPos][VerPos] shifted Location[HorPos][VerPos] ;
+ Field[VerPos][HorPos] := Field[HorPos][VerPos] ;
+ endfor ;
+ endfor ;
+
+% pickup pencircle scaled 0pt ;
+
+ Page := unitsquare xscaled PaperWidth yscaled PaperHeight ;
+ bboxmargin := 0 ; setbounds currentpicture to Page ;
+
+enddef ;
+
+def StopPage =
+
+ %pickup pencircle scaled 0pt ;
+
+ bboxmargin := 0 ; setbounds currentpicture to Page ;
+
+enddef ;
+
+% obsolete
+
+def llEnlarged (expr p,d) = (llcorner p shifted (-d,-d)) enddef ;
+def lrEnlarged (expr p,d) = (lrcorner p shifted (+d,-d)) enddef ;
+def urEnlarged (expr p,d) = (urcorner p shifted (+d,+d)) enddef ;
+def ulEnlarged (expr p,d) = (ulcorner p shifted (-d,+d)) enddef ;
+
+def Enlarged (expr p, d) =
+ (llEnlarged (p,d) --
+ lrEnlarged (p,d) --
+ urEnlarged (p,d) --
+ ulEnlarged (p,d) -- cycle)
+enddef ;
+
+endinput ;
diff --git a/metapost/context/mp-shap.mp b/metapost/context/mp-shap.mp
new file mode 100644
index 000000000..5b95e71aa
--- /dev/null
+++ b/metapost/context/mp-shap.mp
@@ -0,0 +1,261 @@
+%D \module
+%D [ file=mp-shap.mp,
+%D version=2000.05.31,
+%D title=\CONTEXT\ \METAPOST\ graphics,
+%D subtitle=shapes,
+%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 unknown context_tool : input mp-tool ; fi ;
+if known context_shap : endinput ; fi ;
+
+boolean context_shap ; context_shap := true ;
+
+vardef some_shape_path (expr type) =
+
+ begingroup ;
+
+ save border, xradius, yradius,
+ normal, mirror, rotate,
+ lc, rc, tc, bc, ll, lr, ur, ul,
+ llx, lrx, urx, ulx, lly, lry, ury, uly ;
+
+ path border ;
+
+ xradius := .15 ; xxradius := .10 ;
+ yradius := .15 ; yyradius := .10 ;
+
+ pair ll ; ll := llcorner (unitsquare shifted (-.5,-.5)) ;
+ pair lr ; lr := lrcorner (unitsquare shifted (-.5,-.5)) ;
+ pair ur ; ur := urcorner (unitsquare shifted (-.5,-.5)) ;
+ pair ul ; ul := ulcorner (unitsquare shifted (-.5,-.5)) ;
+
+ pair llx ; llx := ll shifted (xradius,0) ;
+ pair lly ; lly := ll shifted (0,yradius) ;
+
+ pair lrx ; lrx := lr shifted (-xradius,0) ;
+ pair lry ; lry := lr shifted (0,yradius) ;
+
+ pair urx ; urx := ur shifted (-xradius,0) ;
+ pair ury ; ury := ur shifted (0,-yradius) ;
+
+ pair ulx ; ulx := ul shifted (xradius,0) ;
+ pair uly ; uly := ul shifted (0,-yradius) ;
+
+ pair llxx ; llxx := ll shifted (xxradius,0) ;
+ pair llyy ; llyy := ll shifted (0,yyradius) ;
+
+ pair lrxx ; lrxx := lr shifted (-xxradius,0) ;
+ pair lryy ; lryy := lr shifted (0,yyradius) ;
+
+ pair urxx ; urxx := ur shifted (-xxradius,0) ;
+ pair uryy ; uryy := ur shifted (0,-yyradius) ;
+
+ pair ulxx ; ulxx := ul shifted (xxradius,0) ;
+ pair ulyy ; ulyy := ul shifted (0,-yyradius) ;
+
+ pair lc ; lc := ll shifted (0,.5) ;
+ pair rc ; rc := lr shifted (0,.5) ;
+ pair tc ; tc := ul shifted (.5,0) ;
+ pair bc ; bc := ll shifted (.5,0) ;
+
+ def mirror (expr p) =
+ p rotatedaround(origin,180)
+ enddef ;
+
+ def normal (expr p ) =
+ p
+ enddef ;
+
+ def rotate (expr p) =
+ p rotated 45
+ enddef ;
+
+ if type= 0 :
+ border := normal (origin--cycle) ;
+
+ elseif type= 5 :
+ border := normal (llx--lrx{right}...rc...{left}urx--ulx{left}...lc...{right}cycle) ;
+ elseif type= 6 :
+ border := normal (ll--lrx{right}...rc...{left}urx--ul--cycle) ;
+ elseif type= 7 :
+ border := mirror (ll--lrx{right}...rc...{left}urx--ul--cycle) ;
+ elseif type= 8 :
+ border := normal (lr--ury{up}...tc...{down}uly--ll--cycle) ;
+ elseif type= 9 :
+ border := mirror (lr--ury{up}...tc...{down}uly--ll--cycle) ;
+ elseif type=10 :
+ border := normal (ll--lr--ur--ul--ll--ur--ul--ll--cycle) ;
+ elseif type=11 :
+ border := normal (ll--lr--ur--ul--ll--lr--ul--ll--cycle) ;
+ elseif type=12 :
+ border := normal (ll--lrx--ur--ulx--cycle) ;
+ elseif type=13 :
+ border := normal (llx--lr--urx--ul--cycle) ;
+ elseif type=14 :
+ border := normal (lly--bc--lry--ury--tc--uly--cycle) ;
+ elseif type=15 :
+ border := normal (llx--lrx--rc--urx--ulx--lc--cycle) ;
+ elseif type=16 :
+ border := normal (ll--lrx--rc--urx--ul--cycle) ;
+ elseif type=17 :
+ border := mirror (ll--lrx--rc--urx--ul--cycle) ;
+ elseif type=18 :
+ border := normal (lr--ury--tc--uly--ll--cycle) ;
+ elseif type=19 :
+ border := mirror (lr--ury--tc--uly--ll--cycle) ;
+ elseif type=20 :
+ border := normal (ll--lr--ur--ul--ll--llxx--ulxx--ul--ll--
+ lr--ur--urxx--lrxx--cycle) ;
+ elseif type=21 :
+ border := normal (ul--ll--lr--ur--ul--ulyy--uryy--ur--ul--
+ ll--lr--lryy--llyy--cycle) ;
+ elseif type=22 :
+ border := normal (ll--lrx--lry--ur--ulx--uly--cycle) ;
+ elseif type=23 :
+ border := normal (llx--lr--ury--urx--ul--lly--cycle) ;
+ elseif type=24 :
+ border := normal (ll--lr--ur--ul--cycle) ;
+ elseif type=25 :
+ border := normal (llx--lrx--lry--ury--urx--ulx--uly--lly--cycle) ;
+ elseif type=26 :
+ border := normal (ll--lrx--lry--ur--ul--cycle) ;
+ elseif type=27 :
+ border := mirror (ll--lr--ury--urx--ul--cycle) ;
+ elseif type=28 :
+ border := normal (ll--lr--ury--urx--ul--cycle) ;
+ elseif type=29 :
+ border := mirror (ll--lrx--lry--ur--ul--cycle) ;
+ elseif type=30 :
+ border := rotate (bc{right}...{up}rc...tc{left}...{down}lc...{right}bc &
+ bc--tc & tc{left}..{down}lc & lc--rc &
+ rc{up}..tc{left}...{down}lc...{right}bc & cycle) ;
+ elseif type=31 :
+ border := normal (bc{right}...{up}rc...tc{left}...{down}lc...{right}bc &
+ bc--tc & tc{left}..{down}lc & lc--rc &
+ rc{up}..tc{left}...{down}lc...{right}bc & cycle) ;
+ elseif type=32 :
+ border := normal (ll{right}...{right}lry--ur--ul--ll--cycle) ;
+ elseif type=33 :
+ border := normal (ll{right}...{right}lry--ur--ul--ll--cycle
+ --ul--ulx--ulx shifted(0,yyradius)
+ --ur shifted(yyradius,yyradius)
+ --lry shifted(yyradius,yyradius)
+ --lry shifted(0,yyradius)
+ --ur--ul--cycle ) ;
+ elseif type=34 :
+ border := normal (uly..tc..ury &
+ ury..tc shifted (0,-2yradius)..uly &
+ uly--lly &
+ lly..bc..lry &
+ lry--ury &
+ ury..tc shifted (0,-2yradius)..uly & cycle ) ;
+ elseif type=35 :
+ border := normal (bc{right}...rc{up}...tc{left}...lc{down}...cycle) ;
+ elseif type=36 :
+ border := normal (ul--tc{right}..rc{down}..{left}bc--ll &
+ ll..(xpart llx, ypart lc)..ul & cycle) ;
+ elseif type=37 :
+ border := mirror (ul--tc{right}..rc{down}..{left}bc--ll &
+ ll..(xpart llx, ypart lc)..ul & cycle) ;
+ elseif type=38 :
+ border := normal (ll--lc{up}..tc{right}..{down}rc--lr &
+ lr..(xpart bc, ypart lly)..ll & cycle) ;
+ elseif type=39 :
+ border := mirror (ll--lc{up}..tc{right}..{down}rc--lr &
+ lr..(xpart bc, ypart lly)..ll & cycle) ;
+ elseif type=40 :
+ border := normal (ll--lr--ur--ul--ll--ur--ul--ll--lr--ul--ll--cycle) ;
+ elseif type=41 :
+ border := normal (ll--lr--ur--ul--ll--lr--rc--lc--ll--bc--tc--ul--ll & cycle) ;
+ elseif type=42 :
+ border := normal (ll--lr--origin shifted (+epsilon,0)--
+ ur--ul--origin shifted (-epsilon,0)--cycle) ;
+ elseif type=43 :
+ border := normal (ll--ul--origin shifted (0,+epsilon)--
+ ur--lr--origin shifted (0,-epsilon)--cycle) ;
+ elseif type=45 :
+ border := normal (bc--rc--tc--lc--cycle) ;
+ elseif type=46 :
+ border := normal (ll--ul--rc--cycle) ;
+ elseif type=47 :
+ border := mirror (ll--ul--rc--cycle) ;
+ elseif type=48 :
+ border := mirror (ul--ur--bc--cycle) ;
+ elseif type=49 :
+ border := normal (ul--ur--bc--cycle) ;
+
+ elseif type=56 :
+ border := normal (ll--lry--ury--ul--cycle) ;
+ elseif type=57 :
+ border := mirror (ll--lry--ury--ul--cycle) ;
+ elseif type=58 :
+ border := normal (ll--ulx--urx--lr--cycle) ;
+ elseif type=59 :
+ border := mirror (ll--ulx--urx--lr--cycle) ;
+
+ elseif type= 61 :
+ border := normal (fullcircle scaled (1.5*yradius) xscaled (grid_height/grid_width)) ;
+ elseif type= 62 :
+ border := normal (fullcircle scaled (2.0*yradius) xscaled (grid_height/grid_width)) ;
+
+ elseif type= 66 :
+ border := normal (rc--origin shifted ( epsilon,0) --cycle &
+ rc--origin --cycle ) ;
+ elseif type= 67 :
+ border := normal (lc--origin shifted (-epsilon,0) --cycle &
+ lc--origin --cycle ) ;
+ elseif type= 68 :
+ border := normal (tc--origin shifted (0, epsilon) --cycle &
+ tc--origin --cycle ) ;
+ elseif type= 69 :
+ border := normal (bc--origin shifted (0,-epsilon) --cycle &
+ bc--origin --cycle ) ;
+
+ elseif type= 75 :
+ border := mirror (lly--lry--ury--uly--cycle) ;
+ elseif type= 76 :
+ border := mirror (ll--lr--ur--uly--cycle) ;
+ elseif type= 77 :
+ border := mirror (ll--lr--ury--ul--cycle) ;
+ elseif type= 78 :
+ border := mirror (lly--lr--ur--ul--cycle) ;
+ elseif type= 79 :
+ border := mirror (ll--lry--ur--ul--cycle) ;
+
+ else :
+ border := normal (origin--cycle) ;
+ %border := normal (ll--lr--ur--ul--cycle) ;
+ fi ;
+
+ border
+
+ endgroup
+
+enddef;
+
+def some_shape ( expr shape_type ,
+ shape_width ,
+ shape_height ,
+ shape_linewidth ,
+ shape_linecolor ,
+ shape_fillcolor ) =
+
+ path p ; p :=
+ some_shape_path (shape_type)
+ xscaled shape_width
+ yscaled shape_height ;
+
+ pickup pencircle scaled shape_linewidth ;
+
+ fill p withcolor shape_fillcolor ;
+ draw p withcolor shape_linecolor ;
+
+enddef ;
+
+endinput ;
diff --git a/metapost/context/mp-spec.mp b/metapost/context/mp-spec.mp
new file mode 100644
index 000000000..7fa743cbc
--- /dev/null
+++ b/metapost/context/mp-spec.mp
@@ -0,0 +1,147 @@
+%D \module
+%D [ file=mp-spec.mp,
+%D version=1999.6.26,
+%D title=\CONTEXT\ \METAPOST\ graphics,
+%D subtitle=special extensions,
+%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.
+
+%D This module is rather preliminary and subjected to
+%D changes. Here we closely cooperates with the \METAPOST\
+%D to \PDF\ converter module built in \CONTEXT\ and provides
+%D for instance shading. More information can be found in
+%D type {supp-mpe.tex}.
+
+if unknown context_tool : input mp-tool ; fi ;
+if known context_spec : endinput ; fi ;
+
+boolean context_spec ; context_spec := true ;
+
+numeric _special_counter_ ; _special_counter_ := 0 ;
+numeric _color_counter_ ; _color_counter_ := 0 ;
+numeric _special_signal_ ; _special_signal_ := 123 ;
+
+%D When set to \type {true}, shading will be supported. Some
+%D day I will also write an additional directive.
+
+boolean _inline_specials_ ; _inline_specials_ := false ;
+
+%D Because we want to output only those specials that are
+%D actually used in a figure, we need a bit complicated
+%D bookkeeping and collection of specials. At the cost of some
+%D obscurity, we now have rather efficient resources.
+
+string _all_specials_ ; _all_specials_ := "" ;
+
+vardef add_special_signal =
+ if (length _all_specials_>0) :
+ special ("%%MetaPostSpecials: 1.0 " & decimal _special_signal_ ) ; % version
+ fi ;
+enddef ;
+
+vardef add_extra_specials =
+ scantokens _all_specials_ ;
+enddef ;
+
+vardef reset_extra_specials =
+ _all_specials_ := "" ;
+enddef ;
+
+extra_endfig :=
+ " add_special_signal ; " &
+ extra_endfig &
+ " add_extra_specials ; " &
+ " reset_extra_specials ; " ;
+
+def flush_special (expr typ, siz, dat) =
+ _special_counter_ := _special_counter_ + 1 ;
+ if _inline_specials_ :
+ _all_specials_ := _all_specials_
+ & "special "
+ & "(" & ditto
+ & dat & " "
+ & decimal _special_counter_ & " "
+ & decimal typ & " "
+ & decimal siz
+ & " special"
+ & ditto & ");" ;
+ else :
+ _all_specials_ := _all_specials_
+ & "special "
+ & "(" & ditto
+ & "%%MetaPostSpecial: "
+ & decimal siz & " "
+ & dat & " "
+ & decimal _special_counter_ & " "
+ & decimal typ
+ & ditto & ");" ;
+ fi ;
+enddef ;
+
+%D Shade allocation.
+
+vardef define_circular_shade (expr a, b, ra, rb, ca, cb) =
+ flush_special(3, 17, "0 1 1" &
+ dddecimal ca & ddecimal a & " " & decimal ra &
+ dddecimal cb & ddecimal b & " " & decimal rb ) ;
+ _special_counter_
+enddef ;
+
+vardef define_linear_shade (expr a, b, ca, cb) =
+ flush_special(2, 15, "0 1 1" &
+ dddecimal ca & ddecimal a &
+ dddecimal cb & ddecimal b ) ;
+ _special_counter_
+enddef ;
+
+%D A few predefined shading macros.
+
+boolean trace_shades ; trace_shades := false ;
+
+def linear_shade (expr p, n, ca, cb) =
+ begingroup ;
+ save a, b, sh ; pair a, b ;
+ if (n=1) : a := llcorner p ; b := urcorner p ;
+ elseif (n=2) : a := llcorner p ; b := ulcorner p ;
+ elseif (n=3) : a := lrcorner p ; b := ulcorner p ;
+ else : a := llcorner p ; b := lrcorner p ;
+ fi ;
+ fill p withshade define_linear_shade (a,b,ca,cb) ;
+ if trace_shades :
+ drawarrow a -- b withpen pencircle scaled 1pt ;
+ fi ;
+ endgroup ;
+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) ;
+ 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 ;
+ fill p withshade define_circular_shade(ab,ab,0,r,ca,cb) ;
+ if trace_shades :
+ drawarrow ab -- ab shifted (0,r) withpen pencircle scaled 1pt ;
+ fi ;
+ endgroup ;
+enddef ;
+
+%D Since a \type {fill p withshade s} syntax looks better
+%D than some macro, we implement a new primary.
+
+primarydef p withshade sc =
+ hide (_color_counter_ := _color_counter_ + 1)
+ p withcolor (_special_signal_/1000,_color_counter_/1000,sc/1000)
+enddef ;
+
+endinput ;
diff --git a/metapost/context/mp-text.mp b/metapost/context/mp-text.mp
new file mode 100644
index 000000000..c08bac5ff
--- /dev/null
+++ b/metapost/context/mp-text.mp
@@ -0,0 +1,202 @@
+%D \module
+%D [ file=mp-text.mp,
+%D version=2000.07.10,
+%D title=\CONTEXT\ \METAPOST\ graphics,
+%D subtitle=text support,
+%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.
+
+%D Under construction.
+
+if unknown context_tool : input mp-tool ; fi ;
+if known context_text : endinput ; fi ;
+
+boolean context_text ; context_text := true ;
+
+if unknown noftexpictures :
+ numeric noftexpictures ; noftexpictures := 0 ;
+fi ;
+
+if unknown texpictures[1] :
+ picture texpictures[] ;
+fi ;
+
+numeric textextoffset ; textextoffset := 0 ;
+
+vardef textext@#(expr txt) =
+ interim labeloffset := textextoffset ;
+ noftexpictures := noftexpictures + 1 ;
+ if string txt :
+ write "% figure " & decimal charcode & " : " &
+ "texpictures[" & decimal noftexpictures & "] := btex " &
+ txt & " etex ;" to jobname & ".mpt" ;
+ if unknown texpictures[noftexpictures] :
+ thelabel@#("unknown",origin)
+ else :
+ thelabel@#(texpictures[noftexpictures],origin)
+ fi
+ else :
+ thelabel@#(txt,origin)
+ fi
+enddef ;
+
+pair laboff.origin ; laboff.origin = (infinity,infinity) ;
+pair laboff.raw ; laboff.raw = (infinity,infinity) ;
+
+vardef thelabel@#(expr s, z) =
+ save p ; picture p ;
+ p = s if not picture s : infont defaultfont scaled defaultscale fi ;
+ if laboff@#<>laboff.origin :
+ (p shifted (z + labeloffset*laboff@# - (labxf@#*lrcorner p +
+ labyf@#*ulcorner p + (1-labxf@#-labyf@#)*llcorner p)))
+ else :
+ (p shifted z)
+ fi
+enddef;
+
+def build_parshape (expr p, offset_or_path, dx, dy,
+ baselineskip, strutheight, strutdepth, topskip) =
+
+ if unknown trace_parshape :
+ boolean trace_parshape ; trace_parshape := false ;
+ fi ;
+
+ begingroup ;
+
+ save q, l, r, line, tt, bb,
+ n, hsize, vsize, vvsize, voffset, hoffset, width, indent,
+ ll, lll, rr, rrr, cp, cq, t, b ;
+
+ path q, l, r, line, tt, bb ;
+ numeric n, hsize, vsize, vvsize, voffset, hoffset, width[], indent[] ;
+ pair ll, lll, rr, rrr, cp, cq, t, b ;
+
+ n := 0 ; cp := center p ;
+
+ if path offset_or_path :
+ q := offset_or_path ; cq := center q ;
+ voffset := dy ;
+ hoffset := dx ;
+ else :
+ q := p ; cq := center q ;
+ hoffset := offset_or_path + dx ;
+ voffset := offset_or_path + dy ;
+ fi ;
+
+ hsize := xpart lrcorner q - xpart llcorner q ;
+ vsize := ypart urcorner q - ypart lrcorner q ;
+
+ q := p shifted - cp ;
+
+ startsavingdata ;
+
+ savedata "\global\parvoffset " & decimal voffset&"bp " ;
+ savedata "\global\parhoffset " & decimal hoffset&"bp " ;
+ savedata "\global\parwidth " & decimal hsize&"bp " ;
+ savedata "\global\parheight " & decimal vsize&"bp " ;
+
+ if not path offset_or_path :
+ q := q xscaled ((hsize-2hoffset)/hsize)
+ yscaled ((vsize-2voffset)/vsize) ;
+ fi ;
+
+ hsize := xpart lrcorner q - xpart llcorner q ;
+ vsize := ypart urcorner q - ypart lrcorner q ;
+
+ t := (ulcorner q -- urcorner q) intersection_point q ;
+ b := (llcorner q -- lrcorner q) intersection_point q ;
+
+ if xpart directionpoint t of q < 0 :
+ q := reverse q ;
+ fi ;
+
+ l := q cutbefore t ;
+ l := l if xpart point 0 of q < 0 : & q fi cutafter b ;
+
+ r := q cutbefore b ;
+ r := r if xpart point 0 of q > 0 : & q fi cutafter t ;
+
+% tt := (ulcorner q -- urcorner q) shifted (0,-topskip) ;
+% bb := (llcorner q -- lrcorner q) shifted (0,strutdepth) ;
+%
+% l := l cutbefore (l intersection_point tt) ;
+% l := l cutafter (l intersection_point bb) ;
+% r := r cutbefore (r intersection_point bb) ;
+% r := r cutafter (r intersection_point tt) ;
+
+ if trace_parshape :
+ drawarrow p withpen pencircle scaled 2pt withcolor red ;
+ drawarrow l shifted cp withpen pencircle scaled 1pt withcolor green ;
+ drawarrow r shifted cp withpen pencircle scaled 1pt withcolor blue ;
+ fi ;
+
+ vardef found_point (expr lin, pat, sig) =
+ pair a, b ;
+ a := pat intersection_point (lin shifted (0,strutheight)) ;
+ if intersection_found :
+ a := a shifted (0,-strutheight) ;
+ else :
+ a := pat intersection_point lin ;
+ fi ;
+ b := pat intersection_point (lin shifted (0,-strutdepth)) ;
+ if intersection_found :
+ if sig :
+ if xpart b > xpart a : a := b shifted (0,strutdepth) fi ;
+ else :
+ if xpart b < xpart a : a := b shifted (0,strutdepth) fi ;
+ fi ;
+ fi ;
+ a
+ enddef ;
+
+ if (strutheight+strutdepth<baselineskip) :
+ vvsize := vsize ;
+ else :
+ vvsize := (vsize div baselineskip) * baselineskip ;
+ fi ;
+
+ for i=topskip step baselineskip until vvsize :
+
+ line := (ulcorner q -- urcorner q) shifted (0,-i-eps) ;
+
+ ll := found_point(line,l,true ) ;
+ rr := found_point(line,r,false) ;
+
+ if trace_parshape :
+ fill (ll--rr--rr shifted (0,strutheight)--ll
+ shifted (0,strutheight)--cycle) shifted cp withcolor .5white ;
+ fill (ll--rr--rr shifted (0,-strutdepth)--ll
+ shifted (0,-strutdepth)--cycle) shifted cp withcolor .7white ;
+ draw ll shifted cp withpen pencircle scaled 2pt ;
+ draw rr shifted cp withpen pencircle scaled 2pt ;
+ draw (ll--rr) shifted cp withpen pencircle scaled .5pt ;
+ fi ;
+
+ n := n + 1 ;
+ indent[n] := abs(xpart ll - xpart llcorner q) ;
+ width[n] := abs(xpart rr - xpart ll) ;
+
+ if (i=strutheight) and (width[n]<baselineskip) :
+ n := n - 1 ;
+ savedata "\global\chardef\parfirst=1 " ;
+ fi ;
+
+ endfor ;
+
+ savedata "\global\parlines " & decimal n ;
+ savedata "\global\partoks{ " ;
+ for i=1 upto n:
+ savedata decimal indent[i]&"bp " & decimal width[i]&"bp " ;
+ endfor ;
+ savedata "}" ;
+
+ stopsavingdata ;
+
+ endgroup ;
+
+enddef ;
diff --git a/metapost/context/mp-tool.mp b/metapost/context/mp-tool.mp
new file mode 100644
index 000000000..a3ad4927e
--- /dev/null
+++ b/metapost/context/mp-tool.mp
@@ -0,0 +1,1216 @@
+%D \module
+%D [ file=mp-tool.mp,
+%D version=1998.02.15,
+%D title=\CONTEXT\ \METAPOST\ graphics,
+%D subtitle=auxiliary macros,
+%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 mreadme.pdf for
+%C details.
+
+%D This module is rather preliminary and subjected to
+%D changes.
+
+if known context_tool : endinput ; fi ;
+
+boolean context_tool ; context_tool := true ;
+
+%D We always want \EPS\ conforming output, so we say:
+
+prologues := 2 ; % 1 = troff, 2 = tex
+warningcheck := 0 ;
+
+%D A semicolor to be used in specials:
+
+string semicolor ; semicolor := char 59 ;
+
+%D By including this module, \METAPOST\ automatically writes a
+%D high resolution boundingbox to the \POSTSCRIPT\ file. This
+%D hack is due to John Hobby himself.
+
+% somehow the first one gets no HiRes.
+
+vardef ddecimal primary p =
+ " " & decimal xpart p &
+ " " & decimal ypart p
+enddef ;
+
+extra_endfig := extra_endfig
+ & "special "
+ & "("
+ & ditto
+ & "%%HiResBoundingBox:"
+ & ditto
+ & "&ddecimal llcorner currentpicture"
+ & "&ddecimal urcorner currentpicture"
+ & ");";
+
+%D Also handy (when we flush colors):
+
+vardef dddecimal primary c =
+ " " & decimal redpart c &
+ " " & decimal greenpart c &
+ " " & decimal bluepart c
+enddef ;
+
+%D We have standardized data file names:
+
+if not known _data_prefix_ :
+
+ string _data_prefix_ ; _data_prefix_ = "mpd-" ;
+ string _data_suffix_ ; _data_suffix_ = ".tmp" ;
+
+fi ;
+
+def data_file =
+ _data_prefix_ & decimal charcode & _data_suffix_
+enddef ;
+
+%D Because \METAPOST\ has a hard coded limit of 4~datafiles,
+%D we need some trickery when we have multiple files.
+
+if unknown collapse_data :
+ boolean collapse_data ; collapse_data := false ;
+fi ;
+
+boolean savingdata ; savingdata := false ;
+
+def savedata expr txt =
+ if collapse_data :
+ write if savingdata : txt else :
+ "\MPdata{" & decimal charcode & "}{" & txt & "}"
+ fi
+ & "%" to jobname & _data_suffix_ ;
+ else :
+ write txt to data_file ;
+ fi ;
+enddef ;
+
+def startsavingdata =
+ savingdata := true ;
+ if collapse_data :
+ write
+ "\MPdata{" & decimal charcode & "}{%"
+ to
+ jobname & _data_suffix_ ;
+ fi ;
+enddef ;
+
+def stopsavingdata =
+ savingdata := false ;
+ if collapse_data :
+ write "}%" to jobname & _data_suffix_ ;
+ fi ;
+enddef ;
+
+%D Instead of a keystroke eating save and allocation
+%D sequence, you can use the \quote {new} alternatives to
+%D save and allocate in one command.
+
+def newcolor text v = forsuffixes i=v : save i ; color i ; endfor ; enddef ;
+def newnumeric text v = forsuffixes i=v : save i ; numeric i ; endfor ; enddef ;
+def newboolean text v = forsuffixes i=v : save i ; boolean i ; endfor ; enddef ;
+def newtransform text v = forsuffixes i=v : save i ; transform i ; endfor ; enddef ;
+def newpath text v = forsuffixes i=v : save i ; path i ; endfor ; enddef ;
+def newpicture text v = forsuffixes i=v : save i ; picture i ; endfor ; enddef ;
+def newstring text v = forsuffixes i=v : save i ; string i ; endfor ; enddef ;
+
+%D Sometimes we don't want parts of the graphics add to the
+%D bounding box. One way of doing this is to save the bounding
+%D box, draw the graphics that may not count, and restore the
+%D bounding box.
+%D
+%D \starttypen
+%D push_boundingbox currentpicture;
+%D pop_boundingbox currentpicture;
+%D \stoptypen
+%D
+%D The bounding box can be called with:
+%D
+%D \starttypen
+%D boundingbox currentpicture
+%D inner_boundingbox currentpicture
+%D outer_boundingbox currentpicture
+%D \stoptypen
+%D
+%D Especially the latter one can be of use when we include
+%D the graphic in a document that is clipped to the bounding
+%D box. In such occasions one can use:
+%D
+%D \starttypen
+%D set_outer_boundingbox currentpicture;
+%D \stoptypen
+%D
+%D Its counterpart is:
+%D
+%D \starttypen
+%D set_inner_boundingbox p
+%D \stoptypen
+
+path pushed_boundingbox;
+
+def push_boundingbox text p =
+ pushed_boundingbox := boundingbox p;
+enddef;
+
+def pop_boundingbox text p =
+ setbounds p to pushed_boundingbox;
+enddef;
+
+vardef boundingbox primary p =
+ llcorner p --
+ lrcorner p --
+ urcorner p --
+ ulcorner p -- cycle
+enddef;
+
+vardef inner_boundingbox primary p =
+ top rt llcorner p --
+ top lft lrcorner p --
+ bot lft urcorner p --
+ bot rt ulcorner p -- cycle
+enddef;
+
+vardef outer_boundingbox primary p =
+ bot lft llcorner p --
+ bot rt lrcorner p --
+ top rt urcorner p --
+ top lft ulcorner p -- cycle
+enddef;
+
+def innerboundingbox = inner_boundingbox enddef ;
+def outerboundingbox = outer_boundingbox enddef ;
+
+vardef set_inner_boundingbox text q =
+ setbounds q to inner_boundingbox q;
+enddef;
+
+vardef set_outer_boundingbox text q =
+ setbounds q to outer_boundingbox q;
+enddef;
+
+%D Some missing functions can be implemented rather
+%D straightforward:
+
+def tand (expr x) = (sind(x)/cosd(x)) enddef ;
+def sqr (expr x) = (x*x) enddef ;
+def log (expr x) = (if x=0: 0 else: mlog(x)/mlog(10) fi) enddef ;
+def ln (expr x) = (if x=0: 0 else: mlog(x)/256 fi) enddef ;
+def exp (expr x) = ((mexp 256)**x) enddef ;
+def pow (expr x) = (x**power) enddef ;
+def inv (expr x) = (if x=0: 0 else: x**-1 fi) enddef ;
+def asin (expr x) = (x+(x**3)/6+3(x**5)/40) enddef ;
+def acos (expr x) = (asin(-x)) enddef ;
+def atan (expr x) = (x-(x**3)/3+(x**5)/5-(x**7)/7) enddef ;
+
+numeric Pi ; Pi := 3.14159 ;
+
+%D We provide two macros for drawing stripes across a shape.
+%D The first method (with the n suffix) uses another method,
+%D slower in calculation, but more efficient when drawn. The
+%D first macro divides the sides into n equal parts. The
+%D first argument specifies the way the lines are drawn, while
+%D the second argument identifier the way the shape is to be
+%D drawn.
+%D
+%D \starttypen
+%D stripe_path_n
+%D (dashed evenly withcolor blue)
+%D (filldraw)
+%D fullcircle xscaled 100 yscaled 40 shifted (50,50) withpen pencircle scaled 4;
+%D \stoptypen
+%D
+%D The a (or angle) alternative supports arbitrary angles and
+%D is therefore more versatile.
+%D
+%D \starttypen
+%D stripe_path_a
+%D (withpen pencircle scaled 2 withcolor red)
+%D (draw)
+%D fullcircle xscaled 100 yscaled 40 withcolor blue;
+%D \stoptypen
+%D
+%D The first alternative obeys:
+
+stripe_n := 10;
+stripe_slot := 3;
+
+%D When no pen dimensions are passed, the slot determines
+%D the spacing.
+%D
+%D The angle alternative is influenced by:
+
+stripe_gap := 5;
+stripe_angle := 45;
+
+def stripe_path_n (text s_spec) (text s_draw) expr s_path =
+ do_stripe_path_n (s_spec) (s_draw) (s_path)
+enddef;
+
+def do_stripe_path_n (text s_spec) (text s_draw) (expr s_path) text s_text =
+ begingroup
+ save curpic, newpic, bb, pp, ww;
+ picture curpic, newpic;
+ path bb, pp;
+ pp := s_path;
+ curpic := currentpicture;
+ currentpicture := nullpicture;
+ s_draw pp s_text;
+ bb := boundingbox currentpicture;
+ newpic := currentpicture;
+ currentpicture := nullpicture;
+ ww := min(ypart urcorner newpic - ypart llcorner newpic,
+ xpart urcorner newpic - xpart llcorner newpic);
+ ww := ww/(stripe_slot*stripe_n);
+ for i=1/stripe_n step 1/stripe_n until 1:
+ draw point (1+i) of bb -- point (3-i) of bb
+ withpen pencircle scaled ww s_spec ;
+ endfor;
+ for i=0 step 1/stripe_n until 1:
+ draw point (3+i) of bb -- point (1-i) of bb
+ withpen pencircle scaled ww s_spec;
+ endfor;
+ clip currentpicture to pp;
+ addto newpic also currentpicture;
+ currentpicture := curpic;
+ addto currentpicture also newpic;
+ endgroup
+enddef;
+
+def stripe_path_a (text s_spec) (text s_draw) expr s_path =
+ do_stripe_path_a (s_spec) (s_draw) (s_path)
+enddef;
+
+def do_stripe_path_a (text s_spec) (text s_draw) (expr s_path) text s_text =
+ begingroup
+ save curpic, newpic, pp; picture curpic, newpic; path pp ;
+ pp := s_path ;
+ curpic := currentpicture;
+ currentpicture := nullpicture;
+ s_draw pp s_text ;
+ def do_stripe_rotation (expr p) =
+ (currentpicture rotatedaround(center p,stripe_angle))
+ enddef ;
+ s_max := max
+ (xpart llcorner do_stripe_rotation(currentpicture),
+ xpart urcorner do_stripe_rotation(currentpicture),
+ ypart llcorner do_stripe_rotation(currentpicture),
+ ypart urcorner do_stripe_rotation(currentpicture));
+ newpic := currentpicture;
+ currentpicture := nullpicture;
+ for i=-s_max-.5stripe_gap step stripe_gap until s_max:
+ draw (-s_max,i)--(s_max,i) s_spec;
+ endfor;
+ currentpicture := do_stripe_rotation(newpic);
+ clip currentpicture to pp ;
+ addto newpic also currentpicture;
+ currentpicture := curpic;
+ addto currentpicture also newpic;
+ endgroup
+enddef;
+
+%D A few normalizing macros:
+%D
+%D \starttypen
+%D xscale_currentpicture ( width )
+%D yscale_currentpicture ( height )
+%D xyscale_currentpicture ( width, height )
+%D scale_currentpicture ( width, height )
+%D \stoptypen
+
+% def xscale_currentpicture(expr the_width) =
+% natural_width := xpart urcorner currentpicture - xpart llcorner currentpicture;
+% currentpicture := currentpicture scaled (the_width/natural_width) ;
+% enddef;
+%
+% def yscale_currentpicture(expr the_height ) =
+% natural_height := ypart urcorner currentpicture - ypart llcorner currentpicture;
+% currentpicture := currentpicture scaled (the_height/natural_height) ;
+% enddef;
+%
+% def xyscale_currentpicture(expr the_width, the_height) =
+% natural_width := xpart urcorner currentpicture - xpart llcorner currentpicture;
+% natural_height := ypart urcorner currentpicture - ypart llcorner currentpicture;
+% currentpicture := currentpicture
+% xscaled (the_width/natural_width)
+% yscaled (the_height/natural_height) ;
+% enddef;
+%
+% def scale_currentpicture(expr the_width, the_height) =
+% xscale_currentpicture(the_width) ;
+% yscale_currentpicture(the_height) ;
+% enddef;
+
+% nog eens uitbreiden zodat path en pic worden afgehandeld.
+
+% natural_width := xpart urcorner currentpicture - xpart llcorner currentpicture;
+% currentpicture := currentpicture scaled (the_width/natural_width) ;
+
+% TODO TODO TODO TODO, not yet ok
+
+primarydef p xsized w =
+ (p scaled (w/(xpart urcorner p - xpart llcorner p)))
+enddef ;
+
+primarydef p ysized h =
+ (p scaled (h/(ypart urcorner p - ypart llcorner p)))
+enddef ;
+
+primarydef p sized wh =
+ (p xscaled (xpart wh/(xpart urcorner p - xpart llcorner p))
+ yscaled (ypart wh/(ypart urcorner p - ypart llcorner p)))
+enddef ;
+
+primarydef p xysized wh =
+ (p xscaled (xpart wh/(xpart urcorner p - xpart llcorner p))
+ yscaled (ypart wh/(ypart urcorner p - ypart llcorner p)))
+enddef ;
+
+def xscale_currentpicture(expr w) =
+ currentpicture := currentpicture xsized w ;
+enddef;
+
+def yscale_currentpicture(expr h) =
+ currentpicture := currentpicture ysized h ;
+enddef;
+
+def xyscale_currentpicture(expr w, h) =
+ currentpicture := currentpicture xysized (w,h) ;
+enddef;
+
+def scale_currentpicture(expr w, h) =
+ currentpicture := currentpicture xsized w ;
+ currentpicture := currentpicture ysized h ;
+enddef;
+
+%D A full circle is centered at the origin, while a unitsquare
+%D is located in the first quadrant. Now guess what kind of
+%D path fullsquare and unitcircle do return.
+
+path fullsquare, unitcircle ;
+
+fullsquare := unitsquare shifted - center unitsquare ;
+unitcircle := fullcircle shifted urcorner fullcircle ;
+
+%D Some more paths:
+
+path urcircle, ulcircle, llcircle, lrcircle ;
+
+urcircle := origin--(+.5,0)&(+.5,0){up} ..(0,+.5)&(0,+.5)--cycle ;
+ulcircle := origin--(0,+.5)&(0,+.5){left} ..(-.5,0)&(-.5,0)--cycle ;
+llcircle := origin--(-.5,0)&(-.5,0){down} ..(0,-.5)&(0,-.5)--cycle ;
+lrcircle := origin--(0,-.5)&(0,-.5){right}..(+.5,0)&(+.5,0)--cycle ;
+
+path tcircle, bcircle, lcircle, rcircle ;
+
+tcircle = origin--(+.5,0)&(+.5,0){up} ..(0,+.5)..{down} (-.5,0)--cycle ;
+bcircle = origin--(-.5,0)&(-.5,0){down} ..(0,-.5)..{up} (+.5,0)--cycle ;
+lcircle = origin--(0,+.5)&(0,+.5){left} ..(-.5,0)..{right}(0,-.5)--cycle ;
+rcircle = origin--(0,-.5)&(0,-.5){right}..(+.5,0)..{left} (0,+.5)--cycle ;
+
+path urtriangle, ultriangle, lltriangle, lrtriangle ;
+
+urtriangle := origin--(+.5,0)--(0,+.5)--cycle ;
+ultriangle := origin--(0,+.5)--(-.5,0)--cycle ;
+lltriangle := origin--(-.5,0)--(0,-.5)--cycle ;
+lrtriangle := origin--(0,-.5)--(+.5,0)--cycle ;
+
+path unitdiamond, fulldiamond ;
+
+unitdiamond := (.5,0)--(1,.5)--(.5,1)--(0,.5)--cycle ;
+fulldiamond := unitdiamond shifted - center unitdiamond ;
+
+%D shorter
+
+primarydef p xyscaled q =
+ p xscaled (xpart paired(q)) yscaled (ypart paired(q))
+enddef ;
+
+%D Experimenteel, zie folder-3.tex.
+
+def set_grid(expr w, h, nx, ny) =
+ boolean grid[][] ; boolean grid_full ;
+ grid_w := w ;
+ grid_h := h ;
+ grid_nx := nx ;
+ grid_ny := ny ;
+ grid_x := round(w/grid_nx) ; % +.5) ;
+ grid_y := round(h/grid_ny) ; % +.5) ;
+ grid_left := (1+grid_x)*(1+grid_y) ;
+ grid_full := false ;
+ for i=0 upto grid_x:
+ for j=0 upto grid_y:
+ grid[i][j] := false ;
+ endfor ;
+ endfor ;
+enddef ;
+
+vardef new_on_grid(expr _dx_, _dy_) =
+ dx := _dx_ ;
+ dy := _dy_ ;
+ ddx := min(round(dx/grid_nx),grid_x) ; % +.5),grid_x) ;
+ ddy := min(round(dy/grid_ny),grid_y) ; % +.5),grid_y) ;
+ if not grid_full and not grid[ddx][ddy]:
+ grid[ddx][ddy] := true ;
+ grid_left := grid_left-1 ;
+ grid_full := (grid_left=0) ;
+ true
+ else:
+ false
+ fi
+enddef ;
+
+%D usage: \type{innerpath peepholed outerpath}.
+%D
+%D beginfig(1);
+%D def fullsquare = (unitsquare shifted -center unitsquare) enddef ;
+%D fill (fullsquare scaled 200) withcolor red ;
+%D path p ; p := (fullcircle scaled 100) ; bboxmargin := 0 ;
+%D fill p peepholed bbox p ;
+%D endfig;
+
+secondarydef p peepholed q =
+ begingroup ;
+ save start ; pair start ; start := point 0 of p ;
+ if xpart start >= xpart center p :
+ if ypart start >= ypart center p :
+ urcorner q -- ulcorner q -- llcorner q -- lrcorner q --
+ reverse p -- lrcorner q -- cycle
+ else :
+ lrcorner q -- urcorner q -- ulcorner q -- llcorner q --
+ reverse p -- llcorner q -- cycle
+ fi
+ else :
+ if ypart start > ypart center p :
+ ulcorner q -- llcorner q -- lrcorner q -- urcorner q --
+ reverse p -- urcorner q -- cycle
+ else :
+ llcorner q -- lrcorner q -- urcorner q -- ulcorner q --
+ reverse p -- ulcorner q -- cycle
+ fi
+ fi
+ endgroup
+enddef ;
+
+boolean intersection_found ;
+
+secondarydef p intersection_point q =
+ begingroup
+ save x_, y_ ;
+ (x_,y_) = p intersectiontimes q ;
+ if x_<0 :
+ intersection_found := false ;
+ center p % origin
+ else :
+ intersection_found := true ;
+ .5[point x_ of p, point y_ of q]
+ fi
+ endgroup
+enddef ;
+
+%D New, undocumented, experimental:
+
+vardef tensecircle (expr width, height, offset) =
+ ((-width/2,-height/2) ... (0,-height/2-offset) ...
+ (+width/2,-height/2) ... (+width/2+offset,0) ...
+ (+width/2,+height/2) ... (0,+height/2+offset) ...
+ (-width/2,+height/2) ... (-width/2-offset,0) ... cycle)
+enddef ;
+
+%vardef tensecircle (expr width, height, offset) =
+% ((-width/2,-height/2)..(0,-height/2-offset)..(+width/2,-height/2) &
+% (+width/2,-height/2)..(+width/2+offset,0)..(+width/2,+height/2) &
+% (+width/2,+height/2)..(0,+height/2+offset)..(-width/2,+height/2) &
+% (-width/2,+height/2)..(-width/2-offset,0)..(-width/2,-height/2)..cycle)
+%enddef ;
+
+%D Some colors.
+
+color cyan ; cyan = (0,1,1) ;
+color magenta ; magenta = (1,0,1) ;
+color yellow ; yellow = (1,1,0) ;
+
+%D Well, this is the dangerous and naive version:
+
+def drawfill text t =
+ fill t ;
+ draw t ;
+enddef;
+
+%D This two step approach saves the path first, since it can
+%D be a function. Attributes must not be randomized.
+
+def drawfill expr c =
+ path _c_ ; _c_ := c ;
+ do_drawfill
+enddef ;
+
+def do_drawfill text t =
+ draw _c_ t ;
+ fill _c_ t ;
+enddef;
+
+def undrawfill expr c =
+ drawfill c withcolor background
+enddef ;
+
+%D Moved from mp-char.mp
+
+vardef paired (expr d) =
+ if pair d : d else : (d,d) fi
+enddef ;
+
+%primarydef p enlarged d =
+% begingroup ; save dd ; pair dd ;
+% dd := if pair d : d else : (d,d) fi ;
+% (llcorner p shifted (-xpart dd,-ypart dd) --
+% lrcorner p shifted (+xpart dd,-ypart dd) --
+% urcorner p shifted (+xpart dd,+ypart dd) --
+% ulcorner p shifted (-xpart dd,+ypart dd) --
+% cycle)
+% endgroup
+%enddef;
+
+primarydef p enlarged d =
+ (p llmoved d -- p lrmoved d -- p urmoved d -- p ulmoved d -- cycle)
+enddef;
+
+primarydef p llenlarged d =
+ (p llmoved d -- lrcorner p -- urcorner p -- ulcorner p -- cycle)
+enddef ;
+
+primarydef p lrenlarged d =
+ (llcorner p -- p lrmoved d -- urcorner p -- ulcorner p -- cycle)
+enddef ;
+
+primarydef p urenlarged d =
+ (llcorner p -- lrcorner p -- p urmoved d -- ulcorner p -- cycle)
+enddef ;
+
+primarydef p ulenlarged d =
+ (llcorner p -- lrcorner p -- urcorner p -- p ulmoved d -- cycle)
+enddef ;
+
+primarydef p llmoved d =
+ ((llcorner p) shifted (-xpart paired(d),-ypart paired(d)))
+enddef ;
+
+primarydef p lrmoved d =
+ ((lrcorner p) shifted (+xpart paired(d),-ypart paired(d)))
+enddef ;
+
+primarydef p urmoved d =
+ ((urcorner p) shifted (+xpart paired(d),+ypart paired(d)))
+enddef ;
+
+primarydef p ulmoved d =
+ ((ulcorner p) shifted (-xpart paired(d),+ypart paired(d)))
+enddef ;
+
+%D Nice too:
+
+primarydef p superellipsed s =
+ superellipse
+ (.5[lrcorner p,urcorner p],
+ .5[urcorner p,ulcorner p],
+ .5[ulcorner p,llcorner p],
+ .5[llcorner p,lrcorner p],
+ s)
+enddef ;
+
+primarydef p squeezed s =
+ ((llcorner p .. .5[llcorner p,lrcorner p] shifted ( 0, ypart paired(s)) .. lrcorner p) &
+ (lrcorner p .. .5[lrcorner p,urcorner p] shifted (-xpart paired(s), 0) .. urcorner p) &
+ (urcorner p .. .5[urcorner p,ulcorner p] shifted ( 0,-ypart paired(s)) .. ulcorner p) &
+ (ulcorner p .. .5[ulcorner p,llcorner p] shifted ( xpart paired(s), 0) .. llcorner p) & cycle)
+enddef ;
+
+primarydef p randomshifted s =
+ begingroup ; save ss ; pair ss ; ss := paired(s) ;
+ p shifted (-.5xpart ss + uniformdeviate xpart ss,
+ -.5ypart ss + uniformdeviate ypart ss)
+ endgroup
+enddef ;
+
+primarydef p randomized s =
+ for i=0 upto length(p)-1 :
+ ((point i of p) randomshifted s) .. controls
+ ((postcontrol i of p) randomshifted s) and
+ ((precontrol (i+1) of p) randomshifted s) ..
+ endfor cycle
+enddef ;
+
+%D Rather fundamental.
+
+% vardef rightpath expr p =
+% save q, t, b ; path q ; pair t, b ;
+% t := (ulcorner p -- urcorner p) intersection_point p ;
+% b := (llcorner p -- lrcorner p) intersection_point p ;
+% if xpart directionpoint t of p < 0 : p := reverse p ; fi ;
+% q := p cutbefore b ;
+% q := q if xpart point 0 of p > 0 : & p fi cutafter t ;
+% q
+% enddef ;
+%
+% vardef leftpath expr p =
+% save q, t, b ; path q ; pair t, b ;
+% t := (ulcorner p -- urcorner p) intersection_point p ;
+% b := (llcorner p -- lrcorner p) intersection_point p ;
+% if xpart directionpoint t of p < 0 : p := reverse p ; fi ;
+% q := p cutbefore t ;
+% q := q if xpart point 0 of p > 0 : & p fi cutafter b ;
+% q
+% enddef ;
+
+def leftrightpath(expr p, l) =
+ save q, t, b ; path q ; pair t, b ;
+ t := (ulcorner p -- urcorner p) intersection_point p ;
+ b := (llcorner p -- lrcorner p) intersection_point p ;
+ if xpart directionpoint t of p < 0 : p := reverse p ; fi ;
+ q := p cutbefore if l: t else: b fi ;
+ q := q if xpart point 0 of p > 0 : &
+ p fi cutafter if l: b else: t fi ;
+ q
+enddef ;
+
+vardef leftpath expr p = leftrightpath(p,true ) enddef ;
+vardef rightpath expr p = leftrightpath(p,false) enddef ;
+
+%D Tracing.
+
+let normaldraw = draw ;
+let normalfill = fill ;
+
+def drawlineoptions (text t) = def _lin_opt_ = t enddef ; enddef ;
+def drawpointoptions (text t) = def _pnt_opt_ = t enddef ; enddef ;
+def drawcontroloptions(text t) = def _ctr_opt_ = t enddef ; enddef ;
+def drawlabeloptions (text t) = def _lab_opt_ = t enddef ; enddef ;
+def draworiginoptions (text t) = def _ori_opt_ = t enddef ; enddef ;
+def drawboundoptions (text t) = def _bnd_opt_ = t enddef ; enddef ;
+def drawpathoptions (text t) = def _pth_opt_ = t enddef ; enddef ;
+
+drawlineoptions (withpen pencircle scaled 1 withcolor .5white) ;
+drawpointoptions (withpen pencircle scaled 4 withcolor black) ;
+drawcontroloptions(withpen pencircle scaled 2.5 withcolor black) ;
+drawlabeloptions () ;
+draworiginoptions (withpen pencircle scaled 1 withcolor .5white) ;
+drawboundoptions (dashed evenly _ori_opt_) ;
+drawpathoptions (withpen pencircle scaled 5 withcolor .8white) ;
+
+%D Path.
+
+def drawpath expr p =
+ normaldraw p _pth_opt_
+enddef;
+
+%D Arrow.
+
+vardef drawarrowpath expr p =
+ save autoarrows ; boolean autoarrows ; autoarrows := true ;
+ drawarrow p _pth_opt_
+enddef ;
+
+%D Points.
+
+def drawpoint expr c =
+ if string c :
+ string _c_ ; _c_ := "(" & c & ")" ;
+ dotlabel.urt(_c_, scantokens _c_) ;
+ drawdot scantokens _c_
+ else :
+ dotlabel.urt("(" & decimal xpart c & "," & decimal ypart c & ")", c) ;
+ drawdot c
+ fi _pnt_opt_
+enddef ;
+
+%D PathPoints.
+
+def drawpoints expr c = path _c_ ; _c_ := c ; do_drawpoints enddef ;
+def drawcontrolpoints expr c = path _c_ ; _c_ := c ; do_drawcontrolpoints enddef ;
+def drawcontrollines expr c = path _c_ ; _c_ := c ; do_drawcontrollines enddef ;
+def drawpointlabels expr c = path _c_ ; _c_ := c ; do_drawpointlabels enddef ;
+
+def do_drawpoints text t =
+ for _i_=0 upto length(_c_) :
+ normaldraw point _i_ of _c_ _pnt_opt_ t ;
+ endfor ;
+enddef;
+
+def do_drawcontrolpoints text t =
+ for _i_=0 upto length(_c_) :
+ normaldraw precontrol _i_ of _c_ _ctr_opt_ t ;
+ normaldraw postcontrol _i_ of _c_ _ctr_opt_ t ;
+ endfor ;
+enddef;
+
+def do_drawcontrollines text t =
+ for _i_=0 upto length(_c_) :
+ normaldraw point _i_ of _c_ -- precontrol _i_ of _c_ _lin_opt_ t ;
+ normaldraw point _i_ of _c_ -- postcontrol _i_ of _c_ _lin_opt_ t ;
+ endfor ;
+enddef;
+
+boolean swappointlabels ; swappointlabels := false ;
+
+def do_drawpointlabels text t =
+ for _i_=0 upto length(_c_) :
+ pair _u_ ; _u_ := unitvector(direction _i_ of _c_)
+ rotated if swappointlabels : - fi 90 ;
+ pair _p_ ; _p_ := (point _i_ of _c_) ;
+ _u_ := 12 * defaultscale * _u_ ;
+ normaldraw thelabel ( decimal _i_,
+ _p_ shifted if cycle _c_ and (_i_=0) : - fi _u_ ) _lab_opt_ t ;
+ endfor ;
+enddef;
+
+%D Bounding box.
+
+def drawboundingbox expr p =
+ normaldraw boundingbox p _bnd_opt_
+enddef ;
+
+%D Origin.
+
+numeric originlength ; originlength := .5cm ;
+
+def draworigin text t =
+ normaldraw (origin shifted (0, originlength) --
+ origin shifted (0,-originlength)) _ori_opt_ t ;
+ normaldraw (origin shifted ( originlength,0) --
+ origin shifted (-originlength,0)) _ori_opt_ t ;
+enddef;
+
+%D Axis.
+
+numeric tickstep ; tickstep := 5mm ;
+numeric ticklength ; ticklength := 2mm ;
+
+def drawxticks expr c = path _c_ ; _c_ := c ; do_drawxticks enddef ;
+def drawyticks expr c = path _c_ ; _c_ := c ; do_drawyticks enddef ;
+def drawticks expr c = path _c_ ; _c_ := c ; do_drawticks enddef ;
+
+% Adding eps prevents disappearance due to rounding errors.
+
+def do_drawxticks text t =
+ for i=0 step -tickstep until xpart llcorner _c_ - eps :
+ if (i<=xpart lrcorner _c_) :
+ normaldraw (i,-ticklength)--(i,ticklength) _ori_opt_ t ;
+ fi ;
+ endfor ;
+ for i=0 step tickstep until xpart lrcorner _c_ + eps :
+ if (i>=xpart llcorner _c_) :
+ normaldraw (i,-ticklength)--(i,ticklength) _ori_opt_ t ;
+ fi ;
+ endfor ;
+ normaldraw (llcorner _c_ -- ulcorner _c_)
+ shifted (-xpart llcorner _c_,0) _ori_opt_ t ;
+enddef ;
+
+def do_drawyticks text t =
+ for i=0 step -tickstep until ypart llcorner _c_ - eps :
+ if (i<=ypart ulcorner _c_) :
+ normaldraw (-ticklength,i)--(ticklength,i) _ori_opt_ t ;
+ fi ;
+ endfor ;
+ for i=0 step tickstep until ypart ulcorner _c_ + eps :
+ if (i>=ypart llcorner _c_) :
+ normaldraw (-ticklength,i)--(ticklength,i) _ori_opt_ t ;
+ fi ;
+ endfor ;
+ normaldraw (llcorner _c_ -- lrcorner _c_)
+ shifted (0,-ypart llcorner _c_) _ori_opt_ t ;
+enddef ;
+
+def do_drawticks text t =
+ drawxticks _c_ t ;
+ drawyticks _c_ t ;
+enddef ;
+
+%D All of it except axis.
+
+def drawwholepath expr p =
+ draworigin ;
+ drawpath p ;
+ drawcontrollines p ;
+ drawcontrolpoints p ;
+ drawpoints p ;
+ drawboundingbox p ;
+ drawpointlabels p ;
+enddef ;
+
+%D Tracing.
+
+def visualizeddraw expr c =
+ if picture c : normaldraw c else : path _c_ ; _c_ := c ; do_visualizeddraw fi
+enddef ;
+
+def visualizedfill expr c =
+ if picture c : normalfill c else : path _c_ ; _c_ := c ; do_visualizedfill fi
+enddef ;
+
+def do_visualizeddraw text t =
+ draworigin ;
+ drawpath _c_ t ;
+ drawcontrollines _c_ ;
+ drawcontrolpoints _c_ ;
+ drawpoints _c_ ;
+ drawboundingbox _c_ ;
+ drawpointlabels _c_ ;
+enddef ;
+
+def do_visualizedfill text t =
+ if cycle _c_ : normalfill _c_ t fi ;
+ draworigin ;
+ drawcontrollines _c_ ;
+ drawcontrolpoints _c_ ;
+ drawpoints _c_ ;
+ drawboundingbox _c_ ;
+ drawpointlabels _c_ ;
+enddef ;
+
+def visualizepaths =
+ let fill = visualizedfill ;
+ let draw = visualizeddraw ;
+enddef ;
+
+def naturalizepaths =
+ let fill = normalfill ;
+ let draw = normaldraw ;
+enddef ;
+
+extra_endfig := extra_endfig & " naturalizepaths ; " ;
+
+%D Normally, arrowheads don't scale well. So we provide a
+%D hack.
+
+boolean autoarrows ; autoarrows := false ;
+numeric ahfactor ; ahfactor := 2.5 ;
+
+def set_ahlength (text t) =
+ ahlength := (ahfactor*pen_size(t)) ;
+enddef ;
+
+vardef pen_size (text t) =
+ save p ; picture p ; p := nullpicture ;
+ addto p doublepath (top origin -- bot origin) t ;
+ (ypart urcorner p - ypart lrcorner p)
+enddef ;
+
+%D The next two macros are adapted versions of plain
+%D \METAPOST\ definitions.
+
+def _finarr text t =
+ if autoarrows : set_ahlength (t) fi ;
+ draw _apth t ;
+ filldraw arrowhead _apth t ;
+enddef;
+
+def _findarr text t =
+ if autoarrows : set_ahlength (t) fi ;
+ draw _apth t ;
+ fill arrowhead _apth withpen currentpen t ;
+ fill arrowhead reverse _apth withpen currentpen t ;
+enddef ;
+
+%D Handy too ......
+
+vardef pointarrow (expr pat, loc, len, off) =
+ save l, r, s, t ; path l, r ; numeric s ; pair t ;
+ t := if pair loc : loc else : point loc along pat fi ;
+% draw t withpen pencircle scaled 10 withcolor .5white ;
+ s := len/2 - off ; if s<=0 : s := 0 elseif s>len : s := len fi ;
+ r := pat cutbefore t ;
+ r := (r cutafter point (arctime s of r) of r) ;
+ s := len/2 + off ; if s<=0 : s := 0 elseif s>len : s := len fi ;
+ l := reverse (pat cutafter t) ;
+ l := (reverse (l cutafter point (arctime s of l) of l)) ;
+ (l..r)
+enddef ;
+
+def rightarrow (expr pat,tim,len) = pointarrow(pat,tim,len,-len) enddef ;
+def leftarrow (expr pat,tim,len) = pointarrow(pat,tim,len,+len) enddef ;
+def centerarrow (expr pat,tim,len) = pointarrow(pat,tim,len, 0) enddef ;
+
+%D The \type {along} and \type {on} operators can be used
+%D as follows:
+%D
+%D \starttypen
+%D drawdot point .5 along somepath ;
+%D drawdot point 3cm on somepath ;
+%D \stoptypen
+%D
+%D The number denotes a percentage (fraction).
+
+primarydef pct along pat = % also negative
+ (arctime (pct * (arclength pat)) of pat) of pat
+enddef ;
+
+% primarydef len on pat =
+% (arctime len of pat) of pat
+% enddef ;
+
+primarydef len on pat =
+ (arctime if len>0 : len else : (arclength(pat)+len) fi of pat) of pat
+enddef ;
+
+% this cuts of a piece from both ends
+
+tertiarydef pat cutends len =
+ begingroup ; save tap ; path tap ;
+ tap := pat cutbefore (point len on pat) ;
+ (tap cutafter (point -len on tap))
+ endgroup
+enddef ;
+
+%D To be documented.
+
+path freesquare ;
+
+freesquare := ((-1,0)--(-1,-1)--(0,-1)--(+1,-1)--
+ (+1,0)--(+1,+1)--(0,+1)--(-1,+1)--cycle) scaled .5 ;
+
+numeric freelabeloffset ; freelabeloffset := 3pt ;
+numeric freedotlabelsize ; freedotlabelsize := 3pt ;
+
+vardef thefreelabel (expr str, loc, ori) =
+ save s, p, q, l ; picture s ; path p, q ; pair l ;
+ interim labeloffset := freelabeloffset ;
+ s := if string str : thelabel(str,loc) else : str shifted -center str shifted loc fi ;
+ setbounds s to boundingbox s enlarged freelabeloffset ;
+ p := fullcircle scaled (2*length(loc-ori)) shifted ori ;
+ q := freesquare xyscaled (urcorner s - llcorner s) ;
+ l := point (xpart (p intersectiontimes (ori--loc))) of q ;
+setbounds s to boundingbox s enlarged -freelabeloffset ; % new
+ %draw boundingbox s shifted -l withpen pencircle scaled .5pt withcolor red ;
+ (s shifted -l)
+enddef ;
+
+vardef freelabel (expr str, loc, ori) =
+ draw thefreelabel(str,loc,ori) ;
+enddef ;
+
+vardef freedotlabel (expr str, loc, ori) =
+ interim linecap:=rounded ;
+ draw loc withpen pencircle scaled freedotlabelsize ;
+ freelabel(str,loc,ori) ;
+enddef ;
+
+%D \starttypen
+%D drawarrow anglebetween(line_a,line_b,somelabel) ;
+%D \stoptypen
+
+% angleoffset ; angleoffset := 0pt ;
+numeric anglelength ; anglelength := 20pt ;
+numeric anglemethod ; anglemethod := 1 ;
+
+vardef anglebetween (expr a, b, str) = % path path string
+ save pointa, pointb, common, middle, offset ;
+ pair pointa, pointb, common, middle, offset ;
+ save curve ; path curve ;
+ save where ; numeric where ;
+ if round point 0 of a = round point 0 of b :
+ common := point 0 of a ;
+ else :
+ common := a intersectionpoint b ;
+ fi ;
+ pointa := point anglelength on a ;
+ pointb := point anglelength on b ;
+ where := turningnumber (common--pointa--pointb--cycle) ;
+ if anglemethod = 1 :
+ curve := pointa{pointa rotated (where*90)} .. pointb ;
+ middle := point .5 along curve ;
+ elseif anglemethod = 2 :
+ middle := common rotatedaround(.5[pointa,pointb],180) ;
+ curve := pointa--middle--pointb ;
+ elseif anglemethod = 3 :
+ middle := ((common--pointa) rotatedaround (pointa,-where*90))
+ intersectionpoint
+ ((common--pointb) rotatedaround (pointb, where*90)) ;
+ curve := pointa--middle--pointb ;
+ fi ;
+ draw thefreelabel(str, middle, common) withcolor black ;
+ curve
+enddef ;
+
+% Stack
+
+picture currentpicturestack[] ;
+numeric currentpicturedepth ; currentpicturedepth := 0 ;
+
+def pushcurrentpicture =
+ currentpicturedepth := currentpicturedepth + 1 ;
+ currentpicturestack[currentpicturedepth] := currentpicture ;
+ currentpicture := nullpicture ;
+enddef ;
+
+def popcurrentpicture =
+ if currentpicturedepth > 0 :
+ addto currentpicturestack[currentpicturedepth] also currentpicture ;
+ currentpicture := currentpicturestack[currentpicturedepth] ;
+ currentpicturedepth := currentpicturedepth - 1 ;
+ fi ;
+enddef ;
+
+%D colorcircle(size, red, green, blue) ;
+
+% vardef colorcircle (expr size, red, green, blue) =
+% save r, g, b, rr, gg, bb, cc, mm, yy ; save radius ;
+% path r, g, b, rr, bb, gg, cc, mm, yy ; numeric radius ;
+%
+% radius := 5cm ; pickup pencircle scaled (radius/25) ;
+%
+% r := g := b := fullcircle scaled radius shifted (0,radius/4) ;
+%
+% r := r rotatedaround (origin, 15) ;
+% g := g rotatedaround (origin,135) ;
+% b := b rotatedaround (origin,255) ;
+%
+% r := r rotatedaround(center r,-90) ;
+% g := g rotatedaround(center g, 90) ;
+%
+% gg := buildcycle(buildcycle(reverse r,b),g) ;
+% cc := buildcycle(buildcycle(b,reverse g),r) ;
+%
+% rr := gg rotatedaround(origin,120) ;
+% bb := gg rotatedaround(origin,240) ;
+%
+% yy := cc rotatedaround(origin,120) ;
+% mm := cc rotatedaround(origin,240) ;
+%
+% pushcurrentpicture ;
+%
+% fill fullcircle scaled radius withcolor white ;
+%
+% fill rr withcolor red ; fill cc withcolor white-red ;
+% fill gg withcolor green ; fill mm withcolor white-green ;
+% fill bb withcolor blue ; fill yy withcolor white-blue ;
+%
+% for i = rr,gg,bb,cc,mm,yy : draw i withcolor .5white ; endfor ;
+%
+% currentpicture := currentpicture xsized size ;
+%
+% popcurrentpicture ;
+% enddef ;
+
+% vardef colorcircle (expr size, red, green, blue) =
+% save r, g, b, rr, gg, bb, cc, mm, yy ; save radius ;
+% path r, g, b, rr, bb, gg, cc, mm, yy ; numeric radius ;
+%
+% radius := 5cm ; pickup pencircle scaled (radius/25) ;
+%
+% transform t ; t := identity rotatedaround(origin,120) ;
+%
+% r := fullcircle scaled radius
+% shifted (0,radius/4) rotatedaround(origin,15) ;
+%
+% g := r transformed t ; b := g transformed t ;
+%
+% r := r rotatedaround(center r,-90) ;
+% g := g rotatedaround(center g, 90) ;
+%
+% gg := buildcycle(buildcycle(reverse r,b),g) ;
+% cc := buildcycle(buildcycle(b,reverse g),r) ;
+%
+% rr := gg transformed t ; bb := rr transformed t ;
+% yy := cc transformed t ; mm := yy transformed t ;
+%
+% pushcurrentpicture ;
+%
+% fill fullcircle scaled radius withcolor white ;
+%
+% fill rr withcolor red ; fill cc withcolor white-red ;
+% fill gg withcolor green ; fill mm withcolor white-green ;
+% fill bb withcolor blue ; fill yy withcolor white-blue ;
+%
+% for i = rr,gg,bb,cc,mm,yy : draw i withcolor .5white ; endfor ;
+%
+% currentpicture := currentpicture xsized size ;
+%
+% popcurrentpicture ;
+% enddef ;
+
+vardef colorcircle (expr size, red, green, blue) =
+ save r, g, b, c, m, y, w ; save radius ;
+ path r, g, b, c, m, y, w ; numeric radius ;
+
+ radius := 5cm ; pickup pencircle scaled (radius/25) ;
+
+ transform t ; t := identity rotatedaround(origin,120) ;
+
+ r := fullcircle rotated 90 scaled radius
+ shifted (0,radius/4) rotatedaround(origin,135) ;
+
+ b := r transformed t ; g := b transformed t ;
+
+ c := buildcycle(subpath(1,7) of g,subpath(1,7) of b) ;
+ y := c transformed t ; m := y transformed t ;
+
+ w := buildcycle(subpath(3,5) of r, subpath(3,5) of g,subpath(3,5) of b) ;
+
+ pushcurrentpicture ;
+
+ fill r withcolor red ;
+ fill g withcolor green ;
+ fill b withcolor blue ;
+ fill c withcolor white-red ;
+ fill m withcolor white-green ;
+ fill y withcolor white-blue ;
+ fill w withcolor white ;
+
+ for i = r,g,b,c,m,y : draw i withcolor .5white ; endfor ;
+
+ currentpicture := currentpicture xsized size ;
+
+ popcurrentpicture ;
+enddef ;
+
+% penpoint (i,2) of somepath -> inner / outer point
+
+vardef penpoint expr pnt of p =
+ save n, d ; numeric n, d ;
+ (n,d) = if pair pnt : pnt else : (pnt,1) fi ;
+ (point n of p shifted ((penoffset direction n of p of currentpen) scaled d))
+enddef ;
+
+% nice: currentpicture := inverted currentpicture ;
+
+vardef inverted expr p =
+ save pp ; picture pp ; pp := nullpicture ;
+ for i within p :
+ addto pp
+ if stroked i or filled i :
+ if filled i : contour else : doublepath fi pathpart i
+ dashed dashpart i withpen penpart i
+ else :
+ also i
+ fi
+ withcolor white-(redpart i, greenpart i, bluepart i) ;
+ endfor ;
+ pp
+enddef ;
+
+% yes or no: "text" infont "cmr12" at 24pt ;
+
+% let normalinfont = infont ;
+%
+% numeric lastfontsize ; lastfontsize = fontsize defaultfont ;
+%
+% def infont primary name = % no vardef, no expr
+% hide(lastfontsize := fontsize name) % no ;
+% normalinfont name
+% enddef ;
+%
+% def scaledat expr size =
+% scaled (size/lastfontsize)
+% enddef ;
+%
+% let at = scaledat ;
+
+% like decimal
+
+def condition primary b = if b : "true" else : "false" fi enddef ;
+
+endinput ;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-24 01:06:23 +0000