3 # Reads the special comments in the subsegment encoding output from
4 # layout, determines the segment graph, and outputs a description of
9 # We read the segenco.ps and each time we find a `%L segmentpart'
10 # comment we add it to an annotated graph we construct. Each node in
11 # the annotated graph is a tuple consisting of a loc and range of
12 # layer levels. Each edge is a segment part from a %L comment. Each
13 # node has a `front' and a `back', and each edget attach either to
16 # Only segment parts with certain layer kinds are processed: by
17 # default, only the empty layer kind.
19 # When a loc is found in the input, as one end of a segmentpart, it
20 # is considered identical to a existing node (if its details are
21 # sufficiently similar) or creates a new node (if its details are
22 # sufficiently different). If the segmentpart's end is considered
23 # identical to an existing node then the existing node's layer level
24 # range is extended, but the existing node's X Y and A are not
27 # A loc and layer level are compared with a node as follows:
29 # The difference between each of the loc's details and the node's
30 # details is computed. If any of the differences is at least the
31 # min clearance, then the loc/layerb is a new node. Otherwise, all
32 # of the differences must be within the max tolerance and the
33 # loc/layer is the same as the node (coming out of the back if the
34 # 180deg was added to make the angle difference). Otherwise it is
37 # The detail differences are:
38 # Position difference: horizontal distance between loc and node
39 # Angle difference: difference betwen loc's and node's A, or
40 # difference minus 180deg between loc's and node's A, whichever
41 # is the smaller (both reduced mod 360deg to value with
42 # smallest magnitude).
43 # Level difference: 0 if layer level is within node's range
44 # or distance by which it is outside that range.
49 $conf{MinClearLayer}= 6;
50 $conf{MaxTolerLayer}= 4;
51 $conf{MinClearDist}= 0.5;
52 $conf{MaxTolerDist}= 0.05;
53 $conf{MinClearAngle}= 5.0;
54 $conf{MaxTolerAngle}= 0.5;
55 $conf{LayerKinds}= ','; # comma-separated list as for split /\,/, ..., -1;
58 @layerkinds= split /\,/, $conf{LayerKinds}, -1;
66 # $nodes[]{"Edges$back"}[] = [ \$edges[], $far ]
69 # $edges[]{"Node$far"}= [ \$nodes[], $back ]
71 # $edges[]{SubSegSpec}
74 print "/* $_[0] */\n";
77 sub sqr ($) { return $_[0]*$_[0]; }
80 my ($lni,$isdest,$l,$x,$y,$a) = @_;
81 my ($any_outside_toler, $any_outside_clear, $updlayer);
82 my ($ni, $node, %diff, $back, $d, $k);
84 $diff{Layer}= (($d = $l - $node->{LayerMin}) < 0 ? $d :
85 ($d = $l - $node->{LayerMax}) > 0 ? $d :
87 $diff{Dist}= sqrt(sqr($x - $node->{X}) +
88 sqr($y - $node->{Y}));
89 $diff{Angle}= $a - $node->{A}; # <-360,360>
90 if ($diff{Angle} < 0) { $diff{Angle} += 360; } # [0,360>
91 $back= $diff{Angle} >= 90 && $diff{Angle} < 270; # $back <=> [90,270>
92 $back= !!$isdest != !!$back; # logical xor
94 if ($back) { $diff{Angle} -= 180; } # [0,90> or [270,360>
95 if ($diff{Angle} > 180) { $diff{Angle} -= 360; } # [-90,90>
96 $any_outside_clear= 0;
97 $any_outside_toler= 0;
98 foreach $k (keys %diff) {
99 if (abs($diff{$k}) >= $conf{"MinClear$k"}) {
100 $any_outside_clear=1; last;
101 } elsif (abs($diff{$k}) <= $conf{"MaxToler$k"}) {
103 $any_outside_toler=1;
106 if ($any_outside_clear) {
107 } elsif ($any_outside_toler) {
108 die ("mismatch/clash:\n".
109 " $lni has L=$l XY=$x,$y A=$a\n".
110 " $node->{LineInfo} has ".
111 "L=$node->{LayerMin}..$node->{LayerMax}".
112 " XY=$node->{X},$node->{Y} A=$node->{A}\n ");
114 $updlayer= ($diff{Layer} < 0 ? "Min" :
115 $diff{Layer} > 0 ? "Max" :
118 $node->{"Layer$updlayer"}= $l;
119 $node->{LineInfo}.="($l<-$lni)";
121 trace("node $lni existing ".pnode($node)."/$back");
122 return ($node,$back);
125 $node= { X => $x, Y => $y, A => $a,
126 LayerMin => $l, LayerMax => $l, LineInfo => $lni };
129 trace("node $lni created ".pnode($node)."/$back");
130 return ($node,$back);
134 my ($layerkind, $level, $subsegspec, $numbers, @numbers, $dist);
137 next unless m/^\%L /;
138 die unless m/^\%L (\w+)\b/;
139 next unless $1 eq 'segmentpart';
140 die unless m/^\%L segmentpart ([A-Za-z_]*)(\d+) (\S+) ([-.eE0-9 ]+)$/;
141 ($layerkind, $level, $subsegspec, $numbers) = ($1,$2,$3,$4);
142 next unless grep { $layerkind eq $_ } @layerkinds;
143 @numbers = map { $_ + 0 } split / /, $numbers;
144 $dist= shift @numbers;
145 @numbers == 6 or die;
146 $edge= { Dist = $dist, SubSegSpec= $subsegspec };
147 for ($far=0; $far<2; $far++) {
148 @endnums= @numbers[($far*3)..($far*3+2)];
149 ($node,$back)= find_node("$.:$far",$far,$level,@endnums);
150 $edge{"Node$far"}= [ $node, $back ];
151 push @{ $node->{"Edges$back"} }, [ $edge, $far ];
165 # ($pts[0]{X}, $pts[0]{Y}, $pts[0]{A},
166 # $pts[1]{X}, $pts[1]{Y}, $pts[1]{A}) =
169 #(\w+(?:(?:\/([A-Za-z]+)(\d+))?)?)