From 9e026d98ee40090c1a37481e72ec5f2851dee999 Mon Sep 17 00:00:00 2001
From: Justin Lin <caterpillar@openhome.cc>
Date: Thu, 5 Sep 2019 20:01:57 +0800
Subject: [PATCH] add cube_maze

---
 examples/cube_maze.scad | 85 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 examples/cube_maze.scad

diff --git a/examples/cube_maze.scad b/examples/cube_maze.scad
new file mode 100644
index 00000000..734d53de
--- /dev/null
+++ b/examples/cube_maze.scad
@@ -0,0 +1,85 @@
+include <line2d.scad>;
+include <square_maze.scad>;
+
+maze_rows = 8;
+block_width = 2;
+wall_thickness = 1;
+inner_cube = false;
+travel_all = true;
+
+module cube_maze(maze_rows, block_width, wall_thickness, inner_cube, travel_all) {
+    blocks_size = block_width * maze_rows;
+    cube_size = blocks_size - wall_thickness;
+    maze_size = blocks_size + wall_thickness;
+    
+    half_wall_thickness = wall_thickness / 2;
+    half_cube_size = cube_size / 2;
+    half_maze_size = maze_size / 2;
+    
+    origin = half_wall_thickness - half_maze_size;
+    
+    module two_mazes() {
+        translate([origin, origin, half_cube_size]) 
+            linear_extrude(wall_thickness) build_square_maze(
+                maze_rows, 
+                maze_rows, 
+                go_maze(
+                    1, 1,   // starting point
+                    starting_maze(maze_rows, maze_rows),  
+                    maze_rows, maze_rows
+                ), 
+                block_width, 
+                wall_thickness
+            );
+            
+        rotate([180, 0, 0]) 
+            translate([origin, origin, half_cube_size]) 
+                linear_extrude(wall_thickness) build_square_maze(
+                    maze_rows, 
+                    maze_rows, 
+                    go_maze(
+                        1, 1,   // starting point
+                        starting_maze(maze_rows, maze_rows),  
+                        maze_rows, maze_rows
+                    ), 
+                    block_width, 
+                    wall_thickness
+                );       
+    }
+    
+    if(inner_cube) {
+        cube(cube_size + 0.01, center= true);
+    }
+
+    difference() {
+        union() {
+            two_mazes();
+            rotate([90, 0, 0]) two_mazes();
+            rotate([0, 90, 0]) two_mazes();
+        }
+    
+        if(travel_all) {
+            union() {
+                translate([half_maze_size - wall_thickness * 2, -half_maze_size, half_cube_size]) 
+                    cube(wall_thickness);
+            
+                translate([half_maze_size - wall_thickness, half_maze_size - wall_thickness * 2, half_cube_size]) 
+                    cube(wall_thickness);   
+                
+                translate([half_maze_size - wall_thickness, half_maze_size - wall_thickness, -half_cube_size]) 
+                    cube(wall_thickness);
+                
+                translate([-half_maze_size + wall_thickness, half_maze_size - wall_thickness, -half_cube_size - wall_thickness]) 
+                    cube(wall_thickness);
+
+                translate([-half_maze_size, -half_maze_size + wall_thickness, -half_cube_size - wall_thickness]) 
+                    cube(wall_thickness);        
+        
+                translate([-half_maze_size, -half_maze_size, half_cube_size - wall_thickness])
+                    cube(wall_thickness);  
+            }
+        }        
+    }
+}
+
+cube_maze(maze_rows, block_width, wall_thickness, inner_cube, travel_all);