# We generate a physical indication of which commit was used.
#
-# We provide for a scaling factor
-#
-# $Commitid_pixelsz = 0.4;
-# $Commitid_depth = 1.5; // in pixels
+# We provide for scaling factors with dynamic variables:
+# $Commitid_pixelsz if not set, we use 0.4 } multiplied
+# $Commitid_scale if not set, we use 1.0 } together
+# $Commitid_depth if not set, we use xy pixel size from above
+# $Commitid_depth_scale if not set, we use 1.0 (multiplies depth above)
#
# For each form we have
#
-# module Commitid_Form_2D(pixelsz=0.4)
-# module Commitid_Form(pixelsz=0.4, depth=pixelsz)
+# module Commitid_Form_2D() { ... }
+# module Commitid_Form() { ... }
+#
+# These have their origin in the bottom left corner. The 3D model
+# is a positive, has its origin halfway through, and is twice the
+# depth in height, so it can be added or subtracted.
#
-# function Commitid_Form_size(pixelsz=$Commitid_pixelsz) => [ xsz, ysz ]
-#
+# And we provide
+#
+# function Commitid_pixelsz() // $Commitid_pixelsz * $Commitid_scale
+# function Commitid_depth() // see above
#
# We can generate these forms:
#
# Tiny8:
# git rev-list --first-parent --count HEAD
# typically 3-4 characters but we allow for up to 6
+# padded with zeroes; if too long we reduce mod 10^n
# eg
# Tiny4 1070
#
# Tiny4Q 10
# 70
#
-# Git4
-# Git6
-# Git8
-# git-rev-parse HEAD
+# Git4 Git4Q
+# Git6 Git6Q
+# Git8 Git8Q
+# git-rev-parse HEAD (prefix of requested length)
# eg
# Git6 82f2a2
sub p { print @_ or die $!; }
+p <<'END';
+// *** AUTOGENERATED - DO NOT EDIT *** //
+function Commitid_pixelsz() =
+ ($Commitid_pixelsz ? $Commitid_pixelsz : 0.4) *
+ ($Commitid_scale ? $Commitid_scale : 1.0);
+function Commitid_depth() =
+ ($Commitid_depth ? $Commitid_depth : Commitid_pixelsz()) *
+ ($Commitid_depth_scale ? $Commitid_depth_scale : 1.0);
+function Commitid__scale() =
+ Commitid_pixelsz() / 0.1;
+END
+
+sub chrmodname ($) {
+ my ($chr) = @_;
+ my $chrx = sprintf '%#x', ord $chr;
+ return "Commitid__chr_$chrx";
+}
+
+sub gentextmodule ($@) {
+ my ($form, @lines) = @_;
+ my $modb = "Commitid_$form";
+ p "module ${modb}_2D(){\n";
+ p " scale(Commitid__scale()){\n";
+ my $y = @lines;
+ foreach my $line (@lines) {
+ $y--;
+ my $x = 0;
+ foreach my $chr (split //, $line) {
+ next if $chr !~ m/\S/;
+ p sprintf " translate([%d * 0.8, %d * 1.2]) %s();\n",
+ $x, $y, chrmodname $chr;
+ $x++;
+ }
+ }
+ p " }\n";
+ p "}\n";
+ p "module ${modb}(){\n";
+ p " d=Commitid_depth();\n";
+ p " translate([0,0,-d]) linear_extrude(height=d*2) ${modb}_2D();\n";
+ p "}\n";
+}
+
+our @demo;
+
sub parsefont () {
my %cellmap;
for (;;) {
my %chrpolys;
while (<DATA>) {
next unless m/\S/;
+ chomp;
my @chrs = split / /, $_;
<DATA> !~ m/\S/ or die;
foreach my $row (reverse 0..4) {
} elsif (s{^\S}{}) {
my $f = $cellmap{$&};
die unless $f;
- $f =~ s/\b\d/ sprintf '%05d', $col*4000 + $&*2050 /ge;
- $f =~ s/\d\b/ sprintf '%05d', $row*4000 + $&*2050 /ge;
+ $f =~ s/\b\d/ sprintf '%05d', $col*2000 + $&*1025 /ge;
+ $f =~ s/\d\b/ sprintf '%05d', $row*2000 + $&*1025 /ge;
push @{ $chrpolys{$chr} }, [ split / /, $f ];
} else {
die "$_ ?";
}
}
- my @demo;
+ my $demo = '';
my $democols = 6;
foreach my $chr (sort keys %chrpolys) {
- my $chrx = sprintf '%#x', ord $chr;
- my $mod = "Commitid__chr_$chrx";
+ my $mod = chrmodname $chr;
p "module $mod () {\n";
foreach my $poly (@{ $chrpolys{$chr} }) {
p " polygon([";
p "]);\n";
}
p "}\n";
- my $px = @demo % $democols;
- my $py = int(@demo / $democols);
- push @demo, " translate([$px * 1.600, $py * 2.400]) $mod ();\n";
+ $demo .= $chr;
}
- p "module Commitid_FontDemo(){\n";
- p $_ foreach @demo;
- p "}\n";
-
-# use Data::Dumper;
-# print Dumper(\%chrpolys);
+ @demo = reverse $demo =~ m{.{1,$democols}}go;
}
parsefont();
-#p "Commitid_FontDemo();\n";
+gentextmodule('FontDemo', @demo);
__DATA__