From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 16 Feb 2020 16:11:03 +0000 (+0000)
Subject: quacks-ingredients: wip
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=commitdiff_plain;h=d3ba35154fff3230c0e241726183795e557673ae

quacks-ingredients: wip

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---

diff --git a/quacks-ingredients.scad b/quacks-ingredients.scad
new file mode 100644
index 0000000..71a3bd6
--- /dev/null
+++ b/quacks-ingredients.scad
@@ -0,0 +1,97 @@
+// -*- C -*-
+
+token_dia = 18;
+spot_dia = 4;
+spot_gap = spot_dia / 3.0;
+
+thick = 1.5;
+
+multicolour_gap = 0.15; // each side
+initial_layer_thick = 0.400;
+//initial_layer_width = 0.750;
+final_layer_thick = 0.250;
+
+$nspots = 3;
+$spots_absent = false;
+$spots_plusgap = false;
+
+$fs=0.1;
+$fa=1;
+
+module Spots_Extrude_Lower(){
+  d = $spots_plusgap ? 1 : 0;
+  translate([0,0,-d])
+    linear_extrude(height= initial_layer_thick + d)
+    children(0);
+}
+
+module Spots_Extrude_Upper(){
+  d = $spots_plusgap ? 1 : 0;
+  translate([0,0, thick + d])
+    mirror([0,0, 1])
+    linear_extrude(height= final_layer_thick + d)
+    children(0);
+}
+
+module SpotAt(condition, xy) {
+  if (condition == !$spots_absent) {
+    echo(condition, $spots_absent, "Y");
+    translate(xy * (spot_gap + spot_dia) * sqrt(0.5))
+      circle(r= spot_dia/2);
+  } else {
+    echo(condition, $spots_absent, "N");
+  }
+}
+
+module Token_Spots(){
+  SpotAt(($nspots % 2) > 0,  [0,0]);
+  SpotAt($nspots >= 2, [ 1, 1]);
+  SpotAt($nspots >= 2, [-1,-1]);
+  SpotAt($nspots >= 4, [ 1,-1]);
+  SpotAt($nspots >= 4, [-1, 1]);
+}
+
+module Token_Spots_All(){
+  $nspots = 5;
+  Token_Spots();
+}
+
+module Token_L1(){
+  Spots_Extrude_Lower()
+    Token_Spots();
+}
+
+module Token_L2(){
+  $spots_absent = true;
+  Spots_Extrude_Lower()
+    Token_Spots();
+}
+
+module Token_L3(){
+  $spots_plusgap = true;
+  difference(){
+    linear_extrude(height=thick)
+      circle(r=token_dia/2);
+    Spots_Extrude_Lower() Token_Spots_All();
+    Spots_Extrude_Upper() Token_Spots_All();
+  }
+}
+
+module Token_L4(){
+  $spots_absent = true;
+  Spots_Extrude_Upper()
+    Token_Spots();
+}
+
+module Token_L5(){
+  Spots_Extrude_Upper()
+    Token_Spots();
+}
+
+module Demo(){
+  color("red") { Token_L3(); }
+  color("white") { Token_L1(); Token_L5(); }
+  color("black") { Token_L2(); Token_L4(); }
+}
+
+Demo();