add gyro maze

examples/maze/gyro_maze.scad

@@ -0,0 +1,70 @@
+use <regular_polygon_maze.scad>;
+
+cblocks = 8; 
+wall_thickness = 1.5;
+spacing = 0.6;
+$fn = 48;
+
+gyro_maze(cblocks, wall_thickness, spacing);
+
+module gyro_maze(cblocks, wall_thickness, spacing) {
+    // Don't change these variables. They require more math.
+    radius = 15;
+    wall_height = 1;
+    levels = 4;
+    h = radius / 3;
+
+    module maze() {
+        translate([0, 0, radius / 3 - wall_height])
+        linear_extrude(wall_height) 
+        scale(1.029) {
+            difference() {
+                regular_polygon_maze(radius - wall_thickness, cblocks, levels - 1, wall_thickness, $fn); 
+                circle(radius / 3.5);
+            }
+            circle(radius / 3.5 - wall_thickness / 1.45);
+        }
+    }
+
+    intersection() {
+        gyro(radius, levels, spacing);
+        union() {
+            maze();
+            mirror([0, 0, 1]) maze();
+        }
+    }
+
+    difference() {
+        gyro(radius, levels, spacing);
+        
+        translate([0, 0, h - wall_height])
+        linear_extrude(wall_height) 
+            square(radius * 2, center = true);
+
+        translate([0, 0, -h])
+        linear_extrude(wall_height) 
+            square(radius * 2, center = true);        
+    }
+}
+
+module gyro(radius, layers, spacing) {
+	h = radius / 3;
+    half_r = radius / 2.75;
+    r_step = (radius - half_r) / (layers - 1);
+    
+    module rings() {
+        ring_thickness = r_step - spacing;
+        circle(half_r);
+        for(i = [1:layers - 1]) {
+            hollow_out(ring_thickness) 
+                circle(half_r + r_step * i);        
+        }
+    }
+
+    rotate_extrude()
+    intersection() {
+        translate([0, -h]) 
+            square([radius, h * 2]);
+        rings();
+    }
+}