From 89ec4df5838f6d0da585e6402c7adade188f071b Mon Sep 17 00:00:00 2001
From: Justin Lin <justin.sdk@gmail.com>
Date: Wed, 16 Jun 2021 10:17:49 +0800
Subject: [PATCH] add base

---
 examples/spiral_polygons/fidget_star.scad | 76 +++++++++++++++++++++--
 1 file changed, 70 insertions(+), 6 deletions(-)

diff --git a/examples/spiral_polygons/fidget_star.scad b/examples/spiral_polygons/fidget_star.scad
index 5c43aae5..0f2fbc85 100644
--- a/examples/spiral_polygons/fidget_star.scad
+++ b/examples/spiral_polygons/fidget_star.scad
@@ -1,13 +1,15 @@
 use <shape_starburst.scad>;
 
+model = "STAR"; // [STAR, BASE, BOTH]
 r1 = 12;
 r2 = 9.5;
 n = 6;
-number_of_stars = 10;
+number_of_stars = 8;
 height = 20;
 thickness = 1;
 spacing = thickness;
 slope = 0.35;
+base_height = height * 1.75;
 
 /*
 r1 = 12;
@@ -20,9 +22,9 @@ spacing = thickness;
 slope = 0.26;
 */
 
-fidget_star(r1, r2, n, number_of_stars, height, thickness, spacing, slope);
+fidget_star(model, r1, r2, n, number_of_stars, height, thickness, spacing, slope, base_height);
 	
-module fidget_star(r1, r2, n, number_of_stars, height, thickness, spacing, slope) {
+module fidget_star(model, r1, r2, n, number_of_stars, height, thickness, spacing, slope, base_height) {
     theta = 180 / n;
 
 	y = r2 - r2 * cos(theta);
@@ -62,7 +64,69 @@ module fidget_star(r1, r2, n, number_of_stars, height, thickness, spacing, slope
 		}
 	}
 	
-	half();	
-	mirror([0, 0, 1])
-		half();
+
+	if(model == "STAR" || model == "BOTH") {
+		half();	
+		mirror([0, 0, 1])
+			half();
+	}
+	// base
+
+	ring_thickness = thickness * 1.5;
+    module base_ring() {
+		translate([0, 0, -ring_thickness])
+		difference() {
+			linear_extrude(ring_thickness, scale = 1.02)
+			offset(ring_thickness / 3, $fn = n)
+			    offset(delta = -thickness)
+					star(rs2[number_of_stars] * s[number_of_stars] * r_ratio, rs2[number_of_stars] * s[number_of_stars]);
+				//star(rs[n] * s[n] - thickness);
+
+			linear_extrude(thickness * 4, center = true)
+			    offset(delta = -ring_thickness)
+					star(rs2[number_of_stars] * s[number_of_stars] * r_ratio, rs2[number_of_stars] * s[number_of_stars]);
+			    //star(rs[n] * s[n] - ring_thickness);	
+		}
+	}
+
+    if(model == "BASE" || model == "BOTH") {
+		color("white") {
+			// plate
+			translate([0, 0, -half_height])
+			linear_extrude(half_height, scale = s[number_of_stars])
+			difference() {
+				star(rs1[number_of_stars], rs2[number_of_stars]);
+				offset(delta = -thickness)
+					star(rs1[number_of_stars], rs2[number_of_stars]);
+			}			
+
+			// ring
+			base_ring();
+			mirror([0, 0, 1])
+				base_ring();
+
+			translate([0, 0, -base_height + ring_thickness])
+			mirror([0, 0, 1])
+			scale([1, 1, 1.5])
+				base_ring();
+
+			// stick
+			d = rs1[number_of_stars] * s[number_of_stars];
+			off_h = -base_height + ring_thickness;
+			a = 180 / n;
+			stick_r = thickness * 1.75;
+			stick_h = base_height - ring_thickness;
+			for(i = [0:n - 1]) {
+				rotate(360 / n * i)
+				translate([d, 0, off_h]) 
+				rotate(a) {
+					linear_extrude(stick_h)
+						circle(stick_r, $fn = n);
+					translate([0, 0, stick_h])
+					linear_extrude(ring_thickness, scale = 0.75)
+						circle(stick_r, $fn = n);
+				}
+			}
+		}
+	}
 }
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