- dir structure (docs, tests, design)

- renderings for README.rst

docs/Makefile

@@ -0,0 +1,19 @@
+os = /usr/local/bin/openscad
+opts =
+imgs = bolt-M4.png nut-M12x0.5.png nutNbolt.png
+
+.PHONY: all
+all: $(imgs)
+
+bolt-M4.png: bolt.scad
+	$(os) $(opts) --D 'type="M4"' --camera=0.49,-0.26,1.55,74.6,0.0,78.9,20 --imgsize=2048,2048 -o $@ $<
+
+nut-M12x0.5.png: nut.scad
+	$(os) $(opts) --D 'type="M12x0.5"' --D 'turns=10' --D 'Douter=16' --camera=-2.2,1.2,1.8,66,0,73,52 --imgsize=2048,2048 --projection=ortho -o $@ $<
+
+nutNbolt.png: nutNbolt.scad
+	$(os) $(opts) --camera=-0.24,1.19,4.24,83,0,326.9,40.3 --imgsize=2048,2048 --projection=ortho -o $@ $<
+
+.PHONY: clean
+clean:
+	rm *.png

docs/bolt.scad

@@ -0,0 +1,15 @@
+/*
+Create nice previews for documentation
+
+:Author: Adrian Schlatter
+:Date: 2019-04-10
+:License: 3-Clause BSD. See LICENSE.
+*/
+
+use <threadlib/threadlib.scad>
+
+type = "M6";
+turns = 5;
+higbee_arc = 45;
+
+bolt(type, turns, higbee_arc=higbee_arc);

docs/nut.scad

@@ -0,0 +1,16 @@
+/*
+Create nice previews for documentation
+
+:Author: Adrian Schlatter
+:Date: 2019-04-10
+:License: 3-Clause BSD. See LICENSE.
+*/
+
+use <threadlib/threadlib.scad>
+
+type = "M12x0.5";
+turns = 10;
+Douter = 16;
+higbee_arc = 45;
+
+nut(type, turns, Douter, higbee_arc=higbee_arc);

docs/nutNbolt.scad

@@ -0,0 +1,26 @@
+/*
+Create nice previews for documentation
+
+:Author: Adrian Schlatter
+:Date: 2019-04-10
+:License: 3-Clause BSD. See LICENSE.
+*/
+
+use <threadlib/threadlib.scad>
+
+type = "M6";
+turns = 6;
+higbee_arc = 45;
+
+P = thread_specs(str(type, "-ext"))[0];
+dz = (turns / 2 - 1/4) * P;
+Douter = thread_specs(str(type, "-int"))[2] * 1.5;
+
+translate([0, 0, dz])
+    rotate([0, 0, -90])
+        bolt(type, turns, higbee_arc=higbee_arc);
+intersection() {
+    nut(type, turns, Douter, higbee_arc=higbee_arc);
+    translate([-100, 0, 0])
+        cube([200, 200, 200]);
+};