Convert to library; add Makefile, images

hexbrick-preview.png is a generated file, but for technical reasons it
must be committed to git to be shown on the github website.

.gitignore

@@ -0,0 +1,4 @@
+hexbrick-demo.scad
+*.stl
+*.png
+!hexbrick-preview.png

Makefile

@@ -0,0 +1,24 @@
+default: hexbrick-demo.scad hexbrick-demo.stl hexbrick-demo.png hexbrick-preview.png
+
+hexbrick-demo.scad: hexbrick-lib.scad demo.scad
+	cat $^ > $@
+
+%.stl: %.scad
+	openscad -o $@ $^
+
+XVFB_RUN := xvfb-run -s "-screen 0 1024x768x24"
+
+%.png: %.scad
+	$(XVFB_RUN) openscad --camera=15,20,0,30,0,25,120 --autocenter --imgsize 7680,5120 -o $*_4x.png $^
+	convert -geometry 25% $*_4x.png $@
+	rm -f $*_4x.png
+
+hexbrick-preview.png: hexbrick-demo.png
+	convert -geometry 50% $< $@
+
+
+.PHONY: clean
+clean:
+	rm -f hexbrick-demo.scad hexbrick-demo.stl hexbrick-demo.png
+
+.DELETE_ON_ERROR:

README.md

@@ -0,0 +1,3 @@
+# Interlocking Hexagonal Toy Bricks 
+
+![Hex Bricks rendered by openscad](hexbrick-preview.png "The plated sample bricks")

demo.scad

@@ -0,0 +1,29 @@
+
+// A-1
+hexgrid(-1,3)
+piece_coordlist([[[0,0]]]);
+piece_coordlist([
+    [[0,1]], [[2,0]]
+]);
+
+// A-3.1
+hexgrid(1,3)
+piece_coordlist([
+    [[0,2]], [[2,1]], [[4,0]]
+]);
+// A-3.2
+hexgrid(4,0)
+piece_coordlist([
+    [[0,2]], [[2,1]], [[3,2]]
+]);
+
+// A-3.3
+hexgrid(1,1)
+piece_coordlist([
+    [[0,1]], [[2,0]], [[1,2]]
+]);
+
+// D-1 (lateral brick)
+hexgrid(4,-1)
+piece_coordlist([[[0,0],[2,0]]]);
+

hexbrick-lib.scad

@@ -171,31 +171,3 @@ module piece_coordlist(cc) {
         }
     }
 }
-
-// A-1
-hexgrid(-1,3)
-piece_coordlist([[[0,0]]]);
-piece_coordlist([
-    [[0,1]], [[2,0]]
-]);
-
-// A-3.1
-hexgrid(1,3)
-piece_coordlist([
-    [[0,2]], [[2,1]], [[4,0]]
-]);
-// A-3.2
-hexgrid(4,0)
-piece_coordlist([
-    [[0,2]], [[2,1]], [[3,2]]
-]);
-
-// A-3.3
-hexgrid(1,1)
-piece_coordlist([
-    [[0,1]], [[2,0]], [[1,2]]
-]);
-
-// D-1 (lateral brick)
-hexgrid(4,-1)
-piece_coordlist([[[0,0],[2,0]]]);