X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=commitid.scad.pl;h=983a4abc08abf4a5b8423705bb59058357f35d5b;hb=fc3343d1347461bcf1f9233db083a9dac66c7c34;hp=6a4aa1f382eff1a8afc00c36687b087d9d03f760;hpb=8f459481b4ea0cbb254247b92da74c294128bfc4;p=reprap-play.git

diff --git a/commitid.scad.pl b/commitid.scad.pl
index 6a4aa1f..983a4ab 100755
--- a/commitid.scad.pl
+++ b/commitid.scad.pl
@@ -81,9 +81,11 @@
 # General form of provided openscad modules
 # -----------------------------------------
 #
-#   module Commitid_MODULE_2D(...)  A collection of polygons forming characters
-#   module Commitid_MODULE(...)     The above, extruded up and down in Z
-#   function Commitid_MODULE_sz()   A 2-vector giving the X,Y size
+#   module Commitid_MODULE_2D(...)   Collection of polygons forming characters
+#   module Commitid_MODULE(...)      The above, extruded up and down in Z
+#   module Commitid_MODULE_M_2D(...) Mirror writing
+#   module Commitid_MODULE_M(...)    3D mirror writing
+#   function Commitid_MODULE_sz()    A 2-vector giving the X,Y size
 #
 # Except for *Best* modules, the XY origin is in the bottom left
 # corner without any margin.  Likewise Commitid_MODULE_sz does not
@@ -93,6 +95,9 @@
 # the model.  This means it's convenient to either add or subtract from
 # a workpiece whose face is in the XY plane.
 #
+# The _M versions are provided to avoid doing inconvenient translation
+# and rotation to get the flipped version in the right place.
+#
 #
 # Autoscaling modules
 # -------------------
@@ -100,10 +105,14 @@
 # These modules take a specification of the available XY space, and
 # select and generate a suitable specific identification layout:
 # 
-#   module Commitid_BestCount_2D(max_sz, margin=Commitid_pixelsz())
-#   module Commitid_BestCount   (max_sz, margin=Commitid_pixelsz())
-#   module Commitid_BestObjid_2D(max_sz, margin=Commitid_pixelsz())
-#   module Commitid_BestObjid   (max_sz, margin=Commitid_pixelsz())
+#   module Commitid_BestCount_2D  (max_sz, margin=Commitid_pixelsz())
+#   module Commitid_BestCount     (max_sz, margin=Commitid_pixelsz())
+#   module Commitid_BestCount_M_2D(max_sz, margin=Commitid_pixelsz())
+#   module Commitid_BestCount_M   (max_sz, margin=Commitid_pixelsz())
+#   module Commitid_BestObjid_2D  (max_sz, margin=Commitid_pixelsz())
+#   module Commitid_BestObjid     (max_sz, margin=Commitid_pixelsz())
+#   module Commitid_BestObjid_M_2D(max_sz, margin=Commitid_pixelsz())
+#   module Commitid_BestObjid_M   (max_sz, margin=Commitid_pixelsz())
 #
 # max_sz should be [x,y].
 #
@@ -159,6 +168,8 @@
 #
 #    module Commitid_LAYOUT_2D()
 #    module Commitid_LAYOUT()
+#    module Commitid_LAYOUT_M_2D()
+#    module Commitid_LAYOUT_M()
 #    function Commitid_LAYOUT_sz()
 #
 # Here LAYOUT is one of the following (giving for example, `module
@@ -279,13 +290,25 @@ sub gentextmodule_demo_start_batch () {
     $gtm_demo_i++;
 }
 
+sub argl_formal (@) { join ', ', @_; }
+sub argl_actual (@) { join ',', map { m/=/ ? $` : $_ } @_; }
+
 sub gen3dmodule ($@) {
-    my ($modb,@argl) = (@_);
-    p "module ${modb}(".(join ', ', @argl)."){\n";
-    p " d=Commitid_depth();\n";
-    p " translate([0,0,-d]) linear_extrude(height=d*2)\n";
-    p "  ${modb}_2D(".(join ',', map { m/=/ ? $` : $_ } @argl).");\n";
-    p "}\n";
+    my ($modb,$size,@argl) = (@_);
+    $size ||= "${modb}_sz()";
+    p "module ${modb}_M_2D(".argl_formal(@argl)."){\n";
+    p "  translate([${size}[0],0])\n";
+    p "    mirror([1,0,0])\n";
+    p "    ${modb}_2D(".argl_actual(@argl).");\n";
+    p "};\n";
+    foreach my $mir ('','_M') {
+	my $mm = "${modb}${mir}";
+	p "module ${mm}(".argl_formal(@argl)."){\n";
+	p " d=Commitid_depth();\n";
+	p " translate([0,0,-d]) linear_extrude(height=d*2)\n";
+	p "  ${mm}_2D(".argl_actual(@argl).");\n";
+	p "}\n";
+    }
 }
 
 sub gentextmodule ($@) {
@@ -309,7 +332,7 @@ sub gentextmodule ($@) {
     }
     p " }\n";
     p "}\n";
-    gen3dmodule($modb);
+    gen3dmodule($modb,'');
 
     p sprintf "function %s_sz() = Commitid__scale() * 0.1 * [ %d, %d ];\n",
 	$modb, 2 * ($cols * 4 - 1), 2 * (@lines * 6 - 1);
@@ -545,7 +568,7 @@ sub do_some_best ($$) {
     my ($modname, $formre) = @_;
     my $fullmodname = "Commitid_${modname}_2D";
     my @argl = qw(max_sz margin=Commitid_pixelsz());
-    p "module $fullmodname(".(join ', ', @argl).") {\n";
+    p "module $fullmodname(".argl_formal(@argl).") {\n";
     my $mbs = '$Commitid_max_best_scale';
     p " sc_max = $mbs ? $mbs : 2;\n";
     p " sz = max_sz - 2*[margin,margin];\n";
@@ -587,7 +610,7 @@ END
     p $_ foreach @do;
     p "}\n";
 
-    gen3dmodule "Commitid_$modname", @argl;
+    gen3dmodule "Commitid_$modname", 'max_sz', @argl;
 }
 
 sub do_git_best () {