From 63dcbe259de8995d86968b3d6faa1c05f136235b Mon Sep 17 00:00:00 2001
From: Justin Lin <caterpillar@openhome.cc>
Date: Fri, 17 May 2019 17:54:28 +0800
Subject: [PATCH] added starburst

---
 src/starburst.scad | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 src/starburst.scad

diff --git a/src/starburst.scad b/src/starburst.scad
new file mode 100644
index 00000000..68ffe769
--- /dev/null
+++ b/src/starburst.scad
@@ -0,0 +1,32 @@
+module starburst(r1, r2, n, height) {
+    a = 180 / n;
+
+    p0 = [0, 0, 0];
+    p1 = [r2 * cos(a), r2 * sin(a), 0];
+    p2 = [r1, 0, 0];
+    p3 = [0, 0, height];
+
+    module half_burst() {
+        polyhedron(points = [p0, p1, p2, p3], 
+            faces = [
+                [0, 2, 1],
+                [0, 1, 3],
+                [0, 3, 2], 
+                [2, 1, 3]
+            ]
+        );
+    }
+
+    module burst() {
+        hull() {
+            half_burst();
+            mirror([0, 1,0]) half_burst();
+        }
+    }
+
+    union() {
+        for(i = [0 : n - 1]) {
+            rotate(2 * a * i) burst();
+        }
+    }
+}
\ No newline at end of file