add doc

README.md

@@ -421,5 +421,6 @@ These examples incubate dotSCAD and dotSCAD refactors these examples. See [examp
 [**maze/mz_squarewalls**(cells, cell_width[, left_border, bottom_border])](https://openhome.cc/eGossip/OpenSCAD/lib3x-mz_squarewalls.html) | a helper for creating square wall data from maze cells.
 [**maze/mz_hexwalls**(cells, cell_radius[, left_border, bottom_border])](https://openhome.cc/eGossip/OpenSCAD/lib3x-mz_hexwalls.html) | a helper for creating hex wall data from maze cells.
 [**maze/mz_theta**(rings, beginning_number[, start, seed])](https://openhome.cc/eGossip/OpenSCAD/lib3x-mz_theta.html) | return cell data of a theta maze.
+[**maze/mz_tiles**(cells[, left_border, bottom_border])](https://openhome.cc/eGossip/OpenSCAD/lib3x-mz_tiles.html) | return cell data of a theta maze.
 
 ----

docs/lib3x-mz_tiles.md

@@ -0,0 +1,75 @@
+# mz_tiles
+
+It turns maze cells into tiles. The retured tiles have a data structure `[x, y, n]`, where `n` is a tile index 0 ~ 15 of the tileset.
+
+![mz_tiles](images/lib3x-mz_tiles-1.JPG)
+
+Just replace the tiles with your own path designs.
+
+**Since:** 3.3
+
+## Parameters
+
+- `cells` : Maze cells.
+- `left_border` : Default to `true`. Create the leftmost border of the maze.
+- `bottom_border` : Default to `true`. Create the bottommost border of the maze.
+
+## Examples
+    
+	use <maze/mz_square_initialize.scad>
+	use <maze/mz_square.scad>
+	use <maze/mz_tiles.scad>
+	use <util/rand.scad>
+
+	rows = 10;
+	columns = 10;
+
+	cells = mz_square(rows, columns);
+
+	tiles = mz_tiles(cells);
+
+	tile_width = 30;
+	for(tile = tiles) {
+		translate([tile.x, tile.y] * tile_width)
+			tile(tile[2], tile_width);
+	}
+
+	module tile(type, width) {
+		// true 表示該方向有通道
+		roads = [
+			[false, false, false, false],
+			[true, false, false, false],
+			[false, true, false, false],
+			[true, true, false, false],
+			[false, false, true, false],
+			[true, false, true, false],
+			[false, true, true, false],
+			[true, true, true, false],
+			[false, false, false, true],
+			[true, false, false, true],
+			[false, true, false, true],
+			[true, true, false, true],
+			[false, false, true, true],
+			[true, false, true, true],
+			[false, true, true, true],
+			[true, true, true, true]
+		];
+
+		difference() {
+			square(width, center = true);
+		
+			for(i = [0:3]) {
+				if(roads[type][i]) {
+					rotate(-90 * i)
+					translate([-width / 4, -width / 4])
+						square([width / 2, width]);
+				}
+			}
+		}
+	}
+
+![mz_tiles](images/lib3x-mz_tiles-2.JPG)
+
+An advanced model.
+
+[![mz_tiles](images/lib3x-mz_tiles-3.JPG)](https://cults3d.com/en/3d-model/art/maze-city)

src/experimental/note.md

@@ -6,8 +6,6 @@ new:
 
 - triangle/tri_subdivide
 
-- maze/mz_tiles?
-
 - mz_hamiltonian supports init_cells
 
    update doc mz_square_initialize
@@ -33,6 +31,6 @@ doc-ed
 
     new:
     - util/sorted, util/binary_search, util/contains
-    - maze/mz_square, maze/mz_theta, maze/mz_squarewalls, maze/mz_hexwalls
+    - maze/mz_square, maze/mz_theta, maze/mz_squarewalls, maze/mz_hexwalls, maze/mz_tiles
     - matrix/m_replace