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+%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 ;
+
+vardef drawshape (expr t, p, lw, lc, fc) =
+ save pp ;
+ if t>1 : % normal shape
+ path pp ;
+ pp := some_shape_path(t) xyscaled(bbwidth(p), bbheight(p)) shifted center p ;
+ fill pp withcolor fc ;
+ draw pp withpen pencircle scaled lw withcolor lc ;
+ elseif t=1 : % background only
+ path pp ;
+ pp := fullsquare xyscaled(bbwidth(p), bbheight(p)) shifted center p ;
+ fill pp withcolor fc ;
+ else : % dimensions only
+ picture pp ; pp := nullpicture ;
+ setbounds pp to fullsquare xyscaled(bbwidth(p), bbheight(p)) shifted center p ;
+ draw pp ;
+ fi ;
+enddef ;
+
+vardef drawline (expr t, p, lw, lc) =
+ if (t>0) and (length(p)>1) :
+ saveoptions ;
+ drawoptions(withpen pencircle scaled lw withcolor lc) ;
+ draw p ;
+ if t = 1 :
+ draw arrowheadonpath(p,1) ;
+ elseif t = 2 :
+ draw arrowheadonpath(reverse p,1) ;
+ elseif t = 3 :
+ for $ = p,reverse p : draw arrowheadonpath($,1) ; endfor ;
+ elseif t = 11 :
+ draw arrowheadonpath(p,1/2) ;
+ elseif t = 12 :
+ draw arrowheadonpath(reverse p,1/2) ;
+ elseif t = 13 :
+ for $=p,reverse p : draw arrowheadonpath($,1) ; endfor ;
+ for $=p,reverse p : draw arrowheadonpath($,3/4) ; endfor ;
+ elseif t = 21 :
+ for $=1/5,1/2,4/5 : draw arrowheadonpath(p,$) ; endfor ;
+ elseif t = 22 :
+ for $=1/5,1/2,4/5 : draw arrowheadonpath(reverse p,$) ; endfor ;
+ elseif t = 23 :
+ for $=p,reverse p : draw arrowheadonpath($,1/4) ; endfor ;
+ fi ;
+ fi ;
+enddef ;
+
+endinput ;