add 3dmaze_mickey

examples/maze/3dmaze_mickey.scad

@@ -0,0 +1,39 @@
+use <experimental/mz_cube.scad>;
+use <experimental/mz_cube_initialize.scad>;
+use <maze3d.scad>;
+
+face_radius = 9;  
+cell_width = 15;
+road_width = 6;
+$fn = 4;  // [4, 8, 12]
+
+3dmaze_mickey();
+
+module 3dmaze_mickey() {
+    function mask_sphere(face_radius) = 
+        let(
+            range = [-face_radius * 1.5: face_radius * 1.5 - 1],
+            ear_p1 = [face_radius * .95, 0, -face_radius * .85],
+            ear_p2 = [-face_radius * .95, 0, -face_radius * .85],
+            ear_r = face_radius / 1.75
+        )
+        [
+            for(z = range)
+            [
+                for(y = range)
+                [
+                    for(x = range)
+                    let(v = [x, y, z], v1 = v - ear_p1, v2 = v - ear_p2)
+                    if(v * v < face_radius ^ 2 || v1 * v1 < ear_r ^ 2 || v2 * v2 < ear_r ^ 2) 1
+                    else 0
+                ]
+            ]
+            
+        ];
+        
+
+    mz = mz_cube_initialize(mask = mask_sphere(face_radius));
+    cells = mz_cube(start = [face_radius, face_radius, face_radius], init_cells = mz);
+    
+    draw_3dmaze(cells, cell_width, road_width);
+}