distort-stl: debugging, fix a perl warning

[reprap-play.git] / distort-stl

diff --git a/distort-stl b/distort-stl
index 844344cdb0c1a1f09a80e3ea9fe61fa168507c36..a470ae39c68a34965ea9fd5f5a3c0e66ddcf6a71 100755 (executable)
--- a/distort-stl
+++ b/distort-stl
@@ -32,6 +32,12 @@ use Data::Dumper;
 
 sub TAU () { M_PI * 2; }
 
+my $ps = $ENV{DISTORT_PS};
+if ($ps) {
+    open PS, "> $ps" or die $!;
+    print PS "%!\n";
+}
+
 our $fa = 10;
 
 our $triangles;
@@ -44,10 +50,24 @@ sub shift_arg () {
 
 #no warnings qw(recursion);
 
-sub maybe_subdivide_triangle ($$$$) {
-    my ($t, $ok, $changed, $edge_need_subdivide_fn) = @_;
+sub sprintf_triangle ($) {
+    my ($t) = @_;
 
-    printf STDERR
+    if ($ps && $t->[3] =~ m/$ENV{DISTORT_PS_RE}/) {
+       printf PS <<'END',
+ %20.16g %20.16g %20.16g moveto
+ %20.16g %20.16g %20.16g lineto
+ %20.16g %20.16g %20.16g lineto
+ closepath stroke
+END
+               $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],
+               or die $!;
+       flush PS or die $!;
+    }
+
+    sprintf
        "%11.6f,%11.6f,%11.6f / ".
        "%11.6f,%11.6f,%11.6f / ".
        "%11.6f,%11.6f,%11.6f  %-40s ",
@@ -55,6 +75,12 @@ sub maybe_subdivide_triangle ($$$$) {
                $t->[1][0], $t->[1][1], $t->[1][2],
                $t->[2][0], $t->[2][1], $t->[2][2],
                $t->[3];
+}
+
+sub maybe_subdivide_triangle ($$$$) {
+    my ($t, $ok, $changed, $edge_need_subdivide_fn) = @_;
+
+    print STDERR sprintf_triangle $t;
     
     foreach my $ix (0..2) {
        my $jx = ($ix+1) % 3;
@@ -67,16 +93,23 @@ sub maybe_subdivide_triangle ($$$$) {
            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;
+
            # triangle i-j-k, splitting edge i-m
            # gives    i-m-k, k-m-j
            my $n = [ @$t ]; $n->[$ix] = \@midp;  $n->[3] = "$t->[3]a$ix$jx";
            unshift @$changed, $n;
 
+           printf STDERR "%s\n", sprintf_triangle $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;
+
+           printf STDERR "%s\n", sprintf_triangle $n;
+
            return;
        }
     }