From cb4eb6f5dfb72aa69bba579dcd6890b0ca08a257 Mon Sep 17 00:00:00 2001
From: Justin Lin <justin.sdk@gmail.com>
Date: Fri, 8 Apr 2022 11:35:29 +0800
Subject: [PATCH] add maze3d_sphere

---
 examples/maze/maze3d_sphere.scad | 86 ++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 examples/maze/maze3d_sphere.scad

diff --git a/examples/maze/maze3d_sphere.scad b/examples/maze/maze3d_sphere.scad
new file mode 100644
index 00000000..bb17d8a3
--- /dev/null
+++ b/examples/maze/maze3d_sphere.scad
@@ -0,0 +1,86 @@
+use <experimental/mz_cube.scad>;
+use <experimental/mz_cube_initialize.scad>;
+use <experimental/mz_cube_get.scad>;
+use <util/has.scad>;
+use <crystal_ball.scad>;
+
+radius = 6;  
+cell_width = 15;
+road_width = 6;
+$fn = 4;  // [4, 8, 12]
+
+maze3d_sphere();
+
+module maze3d_sphere() {
+    function mask_sphere(radius) = 
+        let(range = [-radius: radius - 1])
+        [
+            for(z = range)
+            [
+                for(y = range)
+                [
+                    for(x = range)
+                    let(v = [x, y, z])
+                    if(v * v < radius ^ 2) 1
+                    else 0
+                ]
+            ]
+            
+        ];
+        
+    mz = mz_cube_initialize(mask = mask_sphere(radius));
+    cells = mz_cube(start = [radius, radius, radius] / 2, init_cells = mz);
+
+    layers = len(cells);
+    rows = len(cells[0]);
+    columns = len(cells[0][0]);
+
+    for(z = [0:layers - 1], y = [0:rows - 1], x = [0:columns - 1]) {
+        cell = cells[z][y][x];
+        type = mz_cube_get(cell, "t");
+        
+        if(type != "MASK") {
+            channels = [
+                z_road(type) ,
+                z != 0 && z_road(mz_cube_get(cells[z - 1][y][x], "t")),
+                y_road(type),
+                x_road(type),
+                y != 0 && y_road(mz_cube_get(cells[z][y - 1][x], "t")),
+                x != 0 && x_road(mz_cube_get(cells[z][y][x - 1], "t"))
+            ];
+            
+            translate([x, y, z] * cell_width)
+                drawCell(cell_width, road_width, channels);
+        }
+    }
+
+    function z_road(type) = !has(["Z_WALL", "Z_Y_WALL", "Z_X_WALL", "Z_Y_X_WALL", "MASK"], type);
+
+    function y_road(type) = !has(["Y_WALL", "Y_X_WALL", "Z_Y_WALL", "Z_Y_X_WALL", "MASK"], type);
+
+    function x_road(type) = !has(["X_WALL", "Y_X_WALL", "Z_X_WALL", "Z_Y_X_WALL", "MASK"], type);
+
+    module drawCell(cell_width, road_width, channels) {
+        half_cw = cell_width / 2;
+        half_rw = road_width / 2;
+
+        crystal_ball(half_rw);
+
+        rots = [
+            [0, 0, 0],
+            [180, 0, 0],
+            [-90, 0, 0],
+            [0, 90, 0],
+            [90, 0, 0],
+            [0, -90, 0]
+        ];
+        
+       for(i = [0:5]) {
+            if(channels[i]) {
+                rotate(rots[i])
+                linear_extrude(half_cw)
+                    circle(half_rw);
+            }
+        }
+    }
+}
\ No newline at end of file