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first hg version after svn
author wolffd
date Tue, 10 Feb 2015 15:05:51 +0000
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1 <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
2 <!--
3 This is a generated document. Do not edit.
4 -->
5 <HTML VERSION="2.0">
6 <HEAD>
7 <TITLE>Arrow Shapes</TITLE>
8 </HEAD>
9 <BODY BGCOLOR=white>
10 <A NAME="top"></A>
11 <H1 ALIGN=CENTER>Arrow Shapes</H1>
12 <HR>
13 Arrow shapes can be specified and named using the following simple
14 grammar.
15 Terminals are shown in bold font and nonterminals in italics.
16 Literal characters are given in single quotes.
17 Square brackets [ and ] enclose optional items.
18 Vertical bars | separate alternatives.
19 <TABLE>
20 <TR>
21 <TD ALIGN=RIGHT><I>arrowname</I></TD>
22 <TD ALIGN=LEFT>:</TD>
23 <TD ALIGN=LEFT><I>aname</I> [ <I>aname</I> [ <I>aname</I> [ <I>aname</I> ] ] ]</TD>
24 </TR>
25 <TR>
26 <TD ALIGN=RIGHT><I>aname</I></TD>
27 <TD ALIGN=LEFT>:</TD>
28 <TD ALIGN=LEFT>[ <I>modifiers</I> ] <I>shape</I></TD>
29 </TR>
30 <TR>
31 <TD ALIGN=RIGHT><I>modifiers</I></TD>
32 <TD ALIGN=LEFT>:</TD>
33 <TD ALIGN=LEFT>[ <B>'o'</B> ] [ <I>side</I> ]</TD>
34 </TR>
35 <TR>
36 <TD ALIGN=RIGHT><I>side</I></TD>
37 <TD ALIGN=LEFT>:</TD>
38 <TD ALIGN=LEFT><B>'l'</B></TD>
39 </TR>
40 <TR>
41 <TD ALIGN=RIGHT></TD>
42 <TD ALIGN=LEFT>|</TD>
43 <TD ALIGN=LEFT><B>'r'</B></TD>
44 </TR>
45 <TR>
46 <TD ALIGN=RIGHT><I>shape</I></TD>
47 <TD ALIGN=LEFT>:</TD>
48 <TD ALIGN=LEFT><B>box</B></TD>
49 </TR>
50 <TR>
51 <TD ALIGN=RIGHT></TD>
52 <TD ALIGN=LEFT>|</TD>
53 <TD ALIGN=LEFT><B>crow</B></TD>
54 </TR>
55 <TR>
56 <TD ALIGN=RIGHT></TD>
57 <TD ALIGN=LEFT>|</TD>
58 <TD ALIGN=LEFT><B>diamond</B></TD>
59 </TR>
60 <TR>
61 <TD ALIGN=RIGHT></TD>
62 <TD ALIGN=LEFT>|</TD>
63 <TD ALIGN=LEFT><B>dot</B></TD>
64 </TR>
65 <TR>
66 <TD ALIGN=RIGHT></TD>
67 <TD ALIGN=LEFT>|</TD>
68 <TD ALIGN=LEFT><B>inv</B></TD>
69 </TR>
70 <TR>
71 <TD ALIGN=RIGHT></TD>
72 <TD ALIGN=LEFT>|</TD>
73 <TD ALIGN=LEFT><B>none</B></TD>
74 </TR>
75 <TR>
76 <TD ALIGN=RIGHT></TD>
77 <TD ALIGN=LEFT>|</TD>
78 <TD ALIGN=LEFT><B>normal</B></TD>
79 </TR>
80 <TR>
81 <TD ALIGN=RIGHT></TD>
82 <TD ALIGN=LEFT>|</TD>
83 <TD ALIGN=LEFT><B>tee</B></TD>
84 </TR>
85 <TR>
86 <TD ALIGN=RIGHT></TD>
87 <TD ALIGN=LEFT>|</TD>
88 <TD ALIGN=LEFT><B>vee</B></TD>
89 </TR>
90 </TABLE>
91 <P>
92 The primitive shapes are:
93 <CENTER>
94 <TABLE>
95 <TR>
96 <TD>"box"<TD><IMG SRC="a_box.gif">
97 <TD>"crow"<TD><IMG SRC="a_crow.gif">
98 <TD>"diamond"<TD><IMG SRC="a_diamond.gif">
99 </TR>
100 <TR>
101 <TD>"dot"<TD><IMG SRC="a_dot.gif">
102 <TD>"inv"<TD><IMG SRC="a_inv.gif">
103 <TD>"none"<TD><IMG SRC="a_none.gif">
104 </TR>
105 <TR>
106 <TD>"normal"<TD><IMG SRC="a_normal.gif">
107 <TD>"tee"<TD><IMG SRC="a_tee.gif">
108 <TD>"vee"<TD><IMG SRC="a_open.gif">
109 </TR>
110 </TABLE>
111 </CENTER>
112 <P>
113 As for the modifiers:
114 <DL>
115 <DT>'l'
116 <DD> Clip the shape, leaving only the part to the left of the edge.
117 <DT>'r'
118 <DD> Clip the shape, leaving only the part to the right of the edge.
119 <DT>'o'
120 <DD> Use an open (non-filled) version of the shape.
121 </DL>
122 Left and right are defined as those directions determined by looking
123 from the edge towards the point where the arrow "touches" the node.
124 <P>
125 As an example, the arrow shape <TT>lteeoldiamond</TT> is parsed as
126 <TT>'l' 'tee' 'o' 'l' 'diamond'</TT> and corresponds to the shape
127 <CENTER>
128 <IMG SRC="a_lteeoldiamond.gif">
129 </CENTER>
130 Note that the first arrow shape specified occurs closest to the node.
131 Subsequent arrow shapes, if specified, occur further from the node.
132 <P>
133 Not all syntactically legal combinations of modifiers are meaningful
134 or semantically valid.
135 For example, none of the modifiers make any sense with <TT>none</TT>.
136 The following table indicates which modifiers are allowed with which shapes.
137 <P>
138 <CENTER>
139 <TABLE BORDER=2>
140 <TR ALIGN=CENTER>
141 <TH>Modifier</TH>
142 <TH>box
143 <TH>crow
144 <TH>diamond
145 <TH>dot
146 <TH>inv
147 <TH>none
148 <TH>normal
149 <TH>tee
150 <TH>vee
151 </TR>
152 <TR ALIGN=CENTER><TD>'l'/'r'<TD>X<TD>X<TD>X<TD>&nbsp;<TD>X<TD>&nbsp;<TD>X<TD>X<TD>X</TR>
153 <TR ALIGN=CENTER><TD>'o' <TD>X<TD>&nbsp;<TD>X<TD>X<TD>X<TD>&nbsp;<TD>X<TD>&nbsp;<TD>&nbsp;</TR>
154 </TABLE>
155 </CENTER>
156 <P>
157 This yields 36 different arrow shapes. The optional second, third, fourth shapes
158 can independently be any of the 36, but since <TT>nonenone</TT>
159 is redundant, there are 35**4 + 35**3 + 35**2 + 35 + 1 = 1,544,761 different combinations.
160 <P>
161 The following display contains the 36 combinations possible with a single
162 arrow shape. The node attached to the arrow is not drawn but would appear
163 on the right side of the edge.
164 <P>
165 <CENTER>
166 <TABLE>
167 <TR ALIGN=CENTER>
168 <TD><IMG SRC="aa_box.gif">
169 <TD><IMG SRC="aa_lbox.gif">
170 <TD><IMG SRC="aa_rbox.gif">
171 <TD><IMG SRC="aa_obox.gif">
172 <TD><IMG SRC="aa_olbox.gif">
173 <TD><IMG SRC="aa_orbox.gif">
174 </TR>
175 <TR ALIGN=CENTER>
176 <TD>box
177 <TD>lbox
178 <TD>rbox
179 <TD>obox
180 <TD>olbox
181 <TD>orbox
182 </TR>
183 <TR ALIGN=CENTER>
184 <TD><IMG SRC="aa_crow.gif">
185 <TD><IMG SRC="aa_lcrow.gif">
186 <TD><IMG SRC="aa_rcrow.gif">
187 </TR>
188 <TR ALIGN=CENTER>
189 <TD>crow
190 <TD>lcrow
191 <TD>rcrow
192 </TR>
193 <TR ALIGN=CENTER>
194 <TD><IMG SRC="aa_diamond.gif">
195 <TD><IMG SRC="aa_ldiamond.gif">
196 <TD><IMG SRC="aa_rdiamond.gif">
197 <TD><IMG SRC="aa_odiamond.gif">
198 <TD><IMG SRC="aa_oldiamond.gif">
199 <TD><IMG SRC="aa_ordiamond.gif">
200 </TR>
201 <TR ALIGN=CENTER>
202 <TD>diamond
203 <TD>ldiamond
204 <TD>rdiamond
205 <TD>odiamond
206 <TD>oldiamond
207 <TD>ordiamond
208 </TR>
209 <TR ALIGN=CENTER>
210 <TD><IMG SRC="aa_dot.gif">
211 <TD><IMG SRC="aa_odot.gif">
212 </TR>
213 <TR ALIGN=CENTER>
214 <TD>dot
215 <TD>odot
216 </TR>
217 <TR ALIGN=CENTER>
218 <TD><IMG SRC="aa_inv.gif">
219 <TD><IMG SRC="aa_linv.gif">
220 <TD><IMG SRC="aa_rinv.gif">
221 <TD><IMG SRC="aa_oinv.gif">
222 <TD><IMG SRC="aa_olinv.gif">
223 <TD><IMG SRC="aa_orinv.gif">
224 </TR>
225 <TR ALIGN=CENTER>
226 <TD>inv
227 <TD>linv
228 <TD>rinv
229 <TD>oinv
230 <TD>olinv
231 <TD>orinv
232 </TR>
233 <TR ALIGN=CENTER>
234 <TD><IMG SRC="aa_none.gif">
235 </TR>
236 <TR ALIGN=CENTER>
237 <TD>none
238 </TR>
239 <TR ALIGN=CENTER>
240 <TD><IMG SRC="aa_normal.gif">
241 <TD><IMG SRC="aa_lnormal.gif">
242 <TD><IMG SRC="aa_rnormal.gif">
243 <TD><IMG SRC="aa_onormal.gif">
244 <TD><IMG SRC="aa_olnormal.gif">
245 <TD><IMG SRC="aa_ornormal.gif">
246 </TR>
247 <TR ALIGN=CENTER>
248 <TD>normal
249 <TD>lnormal
250 <TD>rnormal
251 <TD>onormal
252 <TD>olnormal
253 <TD>ornormal
254 </TR>
255 <TR ALIGN=CENTER>
256 <TD><IMG SRC="aa_tee.gif">
257 <TD><IMG SRC="aa_ltee.gif">
258 <TD><IMG SRC="aa_rtee.gif">
259 </TR>
260 <TR ALIGN=CENTER>
261 <TD>tee
262 <TD>ltee
263 <TD>rtee
264 </TR>
265 <TR ALIGN=CENTER>
266 <TD><IMG SRC="aa_vee.gif">
267 <TD><IMG SRC="aa_lvee.gif">
268 <TD><IMG SRC="aa_rvee.gif">
269 </TR>
270 <TR ALIGN=CENTER>
271 <TD>vee
272 <TD>lvee
273 <TD>rvee
274 </TR>
275 </TABLE>
276 </CENTER>
277 </BODY>
278 </HTML>