From a94d14e63212645c23d58ea494a6f933bcf3783b Mon Sep 17 00:00:00 2001
From: djerun <djerun@hamburg.ccc.de>
Date: Sat, 14 Dec 2024 21:49:49 +0100
Subject: [PATCH] [WIP] leightweight lighthouse

---
 generate_lighthouse.sh | 43 +++++++++++++++++++++++++
 lighthouse.scad        | 72 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 115 insertions(+)
 create mode 100755 generate_lighthouse.sh
 create mode 100644 lighthouse.scad

diff --git a/generate_lighthouse.sh b/generate_lighthouse.sh
new file mode 100755
index 0000000..a09cded
--- /dev/null
+++ b/generate_lighthouse.sh
@@ -0,0 +1,43 @@
+#!/bin/sh
+
+# usage: generate_bottle_tag.sh NAME
+
+set -u
+
+VERSION=0.1
+FN=360
+
+# usage: render LAYER PART
+render() {
+	case "$2" in
+		layer)
+			CONNECTOR=false
+			;;
+		connector)
+			CONNECTOR=true
+			;;
+		*)
+			echo 'fatal: invalid part' >&2
+			exit 1
+			;;
+	esac
+
+	echo rendering "$1" "$2"
+	openscad \
+		-D "\$fn=${FN}" \
+		-D "CONNECTOR=${CONNECTOR}" \
+		-D "LAYER=$1" \
+		-o "stls/lighthouse-${2}${1}-v${VERSION}.stl" \
+		lighthouse.scad
+}
+
+cd "$(dirname $0)"
+
+for LAYER in 1 2 3 4;
+do
+	for PART in layer connector
+	do
+		render "$LAYER" "$PART"
+		sleep 1
+	done
+done
diff --git a/lighthouse.scad b/lighthouse.scad
new file mode 100644
index 0000000..df12e9c
--- /dev/null
+++ b/lighthouse.scad
@@ -0,0 +1,72 @@
+$fn=360;
+
+LAYER = 1;
+CONNECTOR = false;
+BASE_LAYER_DIAMETER = 140;
+LAYER_HEIGHT = 125;
+LAYER_SHRINK = 10;
+CONNECTOR_RING_GROOVE_DEPTH = 0.5;
+
+module layer(d) {
+  difference() {
+    cylinder(h=LAYER_HEIGHT, d1=d, d2=d-LAYER_SHRINK);
+    cylinder(h=LAYER_HEIGHT, d1=d-1, d2=d-LAYER_SHRINK-1);
+  }
+}
+
+module layer_connector(d) {
+  difference() {
+    cylinder(h=3*CONNECTOR_RING_GROOVE_DEPTH, d=d+2, center=true);
+    cylinder(h=3*CONNECTOR_RING_GROOVE_DEPTH, d=d-3, center=true);
+    translate([0, 0, CONNECTOR_RING_GROOVE_DEPTH/2]) layer(d);
+    translate([0, 0, -125-CONNECTOR_RING_GROOVE_DEPTH/2]) layer(d+LAYER_SHRINK);
+  }
+}
+
+module base(d) {
+  difference() {
+    union() {
+      difference() {
+        cylinder(h=LAYER_HEIGHT/10, d=d+3*LAYER_SHRINK);
+        translate([0, 0, LAYER_HEIGHT/10-CONNECTOR_RING_GROOVE_DEPTH])
+          cylinder(h=LAYER_HEIGHT, d1=d, d2=d-LAYER_SHRINK);;
+      }
+      intersection() {
+        cylinder(h=LAYER_HEIGHT, d1=d-1, d2=d-LAYER_SHRINK-1);
+        cylinder(h=LAYER_HEIGHT/5, d=d+3*LAYER_SHRINK);
+      }
+    }
+    cylinder(h=LAYER_HEIGHT, d=d-LAYER_SHRINK, center=true);
+    translate([0, 0, 5]) rotate([90, 0, 0]) cylinder(h=d, d=10);
+    translate([0, -d/2, 0]) cube([10, d, 10], center=true);
+  }
+}
+
+module brim(d) {
+  // TODO
+}
+
+module lightroom(d) {
+  // TODO
+}
+
+module light(d) {
+  // TODO
+}
+
+module roof(d) {
+  // TODO
+}
+
+D = BASE_LAYER_DIAMETER - (LAYER-1) * LAYER_SHRINK;
+
+if (CONNECTOR) {
+  if (LAYER == 1) base(D);
+  if ((LAYER >= 2) && (LAYER <= 4)) layer_connector(D);
+  if (LAYER == 5) brim(D);
+  if (LAYER == 6) roof(D);
+} else {
+  if ((LAYER >=1) && (LAYER <=4)) layer(D);
+  if (LAYER == 5) lightroom(D);
+  if (LAYER == 6) light(D);
+}