fairphone-case: make catch catchier

[reprap-play.git] / distort-stl

diff --git a/distort-stl b/distort-stl
index eb3a7a15deb92a6c393b45fd3db21f63426cab00..39e5a150512c339c38a7a635194194a95b886bce 100755 (executable)
--- a/distort-stl
+++ b/distort-stl
@@ -25,58 +25,81 @@
 use strict;
 use autodie;
 
-use File::Temp;
 use List::Util;
+use POSIX;
+use File::Temp ();
+use Data::Dumper;
+
+sub TAU () { M_PI * 2; }
 
 our $fa = 10;
 
-our @triangles;
+our $triangles;
+our $output;
 
 sub shift_arg () {
     die unless @ARGV;
     scalar shift @ARGV;
 }
 
+#no warnings qw(recursion);
+
 sub subdivide_triangle ($$) {
-    my ($it, $fn) = @_;
+    my ($t, $fn) = @_;
+
+    #print STDERR 'SUBDIV', Dumper($t, $fn);
+
     my @mids;
     foreach my $ix (0..2) {
        my $jx = ($ix+1) % 3;
        my @midp;
        foreach my $ci (0..2) {
-           push @midp, 0.5 * ($it->[$ix][$ci] + $it->[$jx][$ci]);
+           push @midp, 0.5 * ($t->[$ix][$ci] + $t->[$jx][$ci]);
        }
-       push @mids, @midp;
+       push @mids, \@midp;
     }
     foreach my $ix (0..2) {
+       #print STDERR 'SUBDIV IX ', $ix, "\n";
        my $kx = ($ix+2) % 3;
-       $fn->([ $it->[$ix], $mids[$ix], $it->[$kx] ]);
+       $fn->([ $t->[$ix], $mids[$ix], $mids[$kx] ]);
     }
+    #print STDERR 'SUBDIV MID\n';
     $fn->(\@mids);
 }
 
+sub append_triangle ($) {
+    my ($t) = @_;
+    push @$output, $t;
+}
+
 #---------- project-cylinder ----------
 
 our $project_cylinder_radius;
 our $project_cylinder_max_d_theta;
 
-sub project_cylinder_tri {
-    my ($it) = @_;
-
-    my $radius = project_cylinder_radius;
-
-    my @thetas = map { $_->[0] / $radius } @$it;
+sub project_cylinder_need_subdivide () {
+    foreach my $t (@$triangles) {
+       my @thetas = map { $_->[0] / $project_cylinder_radius } @$t;
 
-    foreach my $ix (0..2) {
-       if (abs($thetas[$ix] - $thetas[($ix+1)%3])
-           > $project_cylinder_max_d_theta) {
-           subdivide_triangle $it, \&project_cylinder_tri;
-           return;
+       foreach my $ix (0..2) {
+           if (abs($thetas[$ix] - $thetas[($ix+1)%3])
+               > $project_cylinder_max_d_theta) {
+               return 1;
+           }
        }
     }
+    return 0;
+}
+
+sub project_cylinder_tri {
+    my ($t) = @_;
+
+    #print STDERR 'PROJECT', Dumper($t);
+
+    my $radius = $project_cylinder_radius;
 
     my @ot;
-    foreach my $p (@it) {
+    foreach my $p (@$t) {
        my ($x,$y,$z) = @$p;
        my $r = $radius - $y;
        my $theta = $x / $radius;
@@ -84,50 +107,77 @@ sub project_cylinder_tri {
                    -$r * cos($theta),
                    $z ];
     }
-    push @triangles, \@ot;
+    append_triangle \@ot;
 }
 
 sub op__project_cylinder () {
     $project_cylinder_radius = shift_arg;
     $project_cylinder_max_d_theta = $fa * TAU/360;
 
-    my @input = (@triangles);
-    @triangles = ();
+    while (project_cylinder_need_subdivide()) {
+       $output = [];
+       foreach my $t (@$triangles) {
+           subdivide_triangle $t, \&append_triangle;
+       }
+       $triangles = $output;
+    }
 
-    project_cylinder_tri $_ foreach @input;
+    $output = [];
+    foreach my $t (@$triangles) {
+       project_cylinder_tri $t;
+    }
+    $triangles = $output;
 }
 
 #---------- main program ----------
 
-if (@ARGV && $ARGV[0] =~ m/^-/) {
-    die "no options supported\n";
-}
+our $raw;
 
-my $itmp = new File::Temp;
-my $otmp = new File::Temp;
+while (@ARGV && $ARGV[0] =~ m/^-/) {
+    $_ = shift @ARGV;
+    last if m/^--$/;
+    if (s/^--raw$//) {
+       $raw = 1;
+    } else {
+       die "$_ ?";
+    }
+}
 
-system "cat >$itmp";
+my $itmp;
+my $otmp;
 
 my $admesh_stdout = '--write-ascii-stl /dev/fd/3 3>&1 >/dev/null';
 
-open I, "admesh $admesh_stdout $itmp |";
+if ($raw) {
+    open I, "<& STDIN";
+    $otmp = *STDOUT;
+} else {
+    $itmp = new File::Temp;
+    $otmp = new File::Temp;
+
+    system "cat >$itmp";
+
+    open I, "admesh $admesh_stdout $itmp |";
+}
 
 my $triangle;
 
 while (<I>) {
-    if (m/^\s+outer\s+loop/) {
+    s/^\s*//;
+    if (m/^outer\s+loop/) {
        die if $triangle;
        $triangle = [];
-    } elsif (s/^\s+vertex\s+//) {
+    } elsif (s/^vertex\s+//) {
        my $lhs = $&;
        s/\s+$//;
        my @xyz = split /\s+/, $_;
        die unless $triangle;
-       push @$triangle, \@xya;
-    } elsif (m/^\s+endloop/) {
+       push @$triangle, \@xyz;
+    } elsif (m/^endloop/) {
        die unless @$triangle == 3;
-       push @triangles, $triangle;
-    } elsif (m/^\s+(?:solid|facet\s+normal|endfacet|endsolid)\s/) {
+       push @$triangles, $triangle;
+       undef $triangle;
+    } elsif (m/^(?:solid|facet\s+normal|endfacet|endsolid)\s/) {
     } else {
        die "$_ ?";
     }
@@ -146,12 +196,16 @@ select $otmp;
 
 print "solid distort-stl\n";
 
-foreach my $t (@triangles) {
+foreach my $t (@$triangles) {
     print "  facet normal 0 0 0\n";
     print "    outer loop\n";
-    print "      vertex";
-    printf " %.18g", $_ foreach @$t;
-    print "\n";
+    die unless @$t==3;
+    foreach my $p (@$t) {
+       die unless @$p==3;
+       print "      vertex";
+       printf " %.18g", $_ foreach @$p;
+       print "\n";
+    }
     print "    endloop\n";
     print "  endfacet\n";
 }
@@ -160,4 +214,6 @@ print "endsolid distort-stl\n";
 
 flush $otmp;
 
-system "admesh --normal-values $admesh_stdout $otmp";
+if (!$raw) {
+    system "admesh --normal-values $admesh_stdout $otmp";
+}