distort-stl: debugging

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/distort-stl b/distort-stl
index 6dcd23ce3d79c72e02892efece297be2a8bd43b4..844344cdb0c1a1f09a80e3ea9fe61fa168507c36 100755 (executable)
--- a/distort-stl
+++ b/distort-stl
@@ -50,17 +50,18 @@ sub maybe_subdivide_triangle ($$$$) {
     printf STDERR
        "%11.6f,%11.6f,%11.6f / ".
        "%11.6f,%11.6f,%11.6f / ".
-       "%11.6f,%11.6f,%11.6f ",
+       "%11.6f,%11.6f,%11.6f  %-40s ",
                $t->[0][0], $t->[0][1], $t->[0][2],
                $t->[1][0], $t->[1][1], $t->[1][2],
-               $t->[2][0], $t->[2][1], $t->[2][2];
+               $t->[2][0], $t->[2][1], $t->[2][2],
+               $t->[3];
     
     foreach my $ix (0..2) {
        my $jx = ($ix+1) % 3;
        my $kx = ($ix+2) % 3;
        if ($edge_need_subdivide_fn->($t->[$ix], $t->[$jx])) {
            printf STDERR
-               " S i=%d j=%d k=%d \n",
+               " S i=%d j=%d k=%d ",
                $ix, $jx, $kx;
            my @midp;
            foreach my $ci (0..2) {
@@ -68,8 +69,14 @@ sub maybe_subdivide_triangle ($$$$) {
            }
            # triangle i-j-k, splitting edge i-m
            # gives    i-m-k, k-m-j
-           my $n = [ @$t ]; $n->[$ix] = \@midp; unshift @$changed, $n;
-           my $n = [ @$t ]; $n->[$jx] = \@midp; unshift @$changed, $n;
+           my $n = [ @$t ]; $n->[$ix] = \@midp;  $n->[3] = "$t->[3]a$ix$jx";
+           unshift @$changed, $n;
+
+           my $n = [ @$t ]; $n->[$jx] = \@midp;  $n->[3] = "$t->[3]b$ix$jx";
+           unshift @$changed, $n;
+           printf STDERR
+               " midp %11.6f,%11.6f,%11.6f\n",
+               @midp;
            return;
        }
     }
@@ -189,6 +196,7 @@ while (<I>) {
        push @$triangle, \@xyz;
     } elsif (m/^endloop/) {
        die unless @$triangle == 3;
+       push @$triangle, $.;
        push @$triangles, $triangle;
        undef $triangle;
     } elsif (m/^(?:solid|facet\s+normal|endfacet|endsolid)\s/) {