add doc

README.md

@@ -248,10 +248,10 @@ These examples incubate dotSCAD and dotSCAD refactors these examples. See [examp
 ### Maze
 
 - [mz_square_cells](https://openhome.cc/eGossip/OpenSCAD/lib2x-mz_square_cells.html)
-- mz_square_get
-- mz_square_initialize
+- [mz_square_get](https://openhome.cc/eGossip/OpenSCAD/lib2x-mz_square_get.html)
 - mz_square_walls
 - mz_hex_walls
+- mz_square_initialize
 - mz_hamiltonian
 
 ----

docs/lib2x-mz_square_get.md

@@ -0,0 +1,44 @@
+# mz_square_get
+
+It's a helper for getting data from a maze cell.
+
+**Since:** 2.5
+
+## Parameters
+
+- `cell` : A maze cell.
+- `query` : Accepts `"x"`, `"y"` or `"t"`. `"x"` for the cell's x coordinate. `"y"` for the cell's y coordinate. `"t"` for the cell's type. The returned type will be `"NO_WALL"`, `"TOP_WALL"`, `"RIGHT_WALL"`, `"TOP_RIGHT_WALL"` or `"MASK"`.
+
+## Examples
+    
+	use <maze/mz_square_cells.scad>;
+	use <maze/mz_square_get.scad>;
+	use <line2d.scad>;
+
+	rows = 10;
+	columns = 10;
+	cell_width = 5;
+	wall_thickness = 2;
+
+	cells = mz_square_cells(rows, columns);
+
+	for(cell = cells) {
+		x = mz_square_get(cell, "x");
+		y = mz_square_get(cell, "y");
+		type = mz_square_get(cell, "t");;
+		
+		translate([x, y] * cell_width) {
+			if(type == "TOP_WALL" || type == "TOP_RIGHT_WALL") {
+				line2d([0, cell_width], [cell_width, cell_width], wall_thickness);
+			}
+			
+			if(type == "RIGHT_WALL" || type == "TOP_RIGHT_WALL") {
+				line2d([cell_width, cell_width], [cell_width, 0], wall_thickness);
+			}	
+		}
+	}
+
+	line2d([0, 0], [cell_width * rows, 0], wall_thickness);
+	line2d([0, 0], [0, cell_width * columns], wall_thickness);
+
+![mz_square_get](images/lib2x-mz_square_get-1.JPG)

src/maze/mz_square_get.scad

@@ -1,3 +1,13 @@
+/**
+* mz_square_get.scad
+*
+* @copyright Justin Lin, 2020
+* @license https://opensource.org/licenses/lgpl-3.0.html
+*
+* @see https://openhome.cc/eGossip/OpenSCAD/lib2x-mz_square_get.html
+*
+**/
+
 function mz_square_get(cell, query) = 
     let(
         i = search(query, [