- my $kx = ($ix+2) % 3;
- if ($edge_need_subdivide_fn->($t->[$ix], $t->[$jx])) {
- printf STDERR
- " S i=%d j=%d k=%d ",
- $ix, $jx, $kx
- if $debug;
- my @midp;
- foreach my $ci (0..2) {
- push @midp, 0.5 * ($t->[$ix][$ci] + $t->[$jx][$ci]);
- }
-
- printf STDERR
- " midp %11.6f,%11.6f,%11.6f\n",
- @midp
- if $debug;
-
- # triangle i-j-k, splitting edge i-m
- # gives i-m-k, k-m-j
- my $gensplit = sub {
- my ($ixjx, $xwhat) = @_;
- my $n = [ @$t ];
- $n->[$ixjx] = \@midp;
- $n->[3] = "$t->[3]$xwhat";
- printf STDERR "%s\n", sprintf_triangle $n if $debug;
- unshift @$changed, $n;
- };
- $gensplit->($ix, "a$ix$jx");
- $gensplit->($jx, "b$ix$jx");
- return;
+ next unless $edge_need_subdivide_fn->($t->[$ix], $t->[$jx]);
+ my $l2 = 0;
+ foreach my $ci (0..2) {
+ my $d = $t->[$ix][$ci] - $t->[$jx][$ci];
+ $l2 += $d*$d;