add mz_squarewalls

src/experimental/note.md

@@ -9,4 +9,5 @@ new:
 - noise/worley_sphere?
 - voronoi/vrn_sphere?
 - t3d - roll/pitch/forward
-- polyline_join: doc multi-childs
+- polyline_join: doc multi-childs
+- mz_squarewalls

src/maze/mz_squarewalls.scad

@@ -0,0 +1,28 @@
+/**
+* mz_square_walls.scad
+*
+* @copyright Justin Lin, 2020
+* @license https://opensource.org/licenses/lgpl-3.0.html
+*
+* @see https://openhome.cc/eGossip/OpenSCAD/lib3x-mz_square_walls.html
+*
+**/
+
+use <_impl/_mz_square_walls_impl.scad>;
+
+function mz_squarewalls(cells, cell_width, left_border = true, bottom_border = true) = 
+    let(
+        rows = len([for(cell = cells) if(cell.y == 0) undef]),
+        columns = len(cells) - rows,
+        left_walls = left_border ? [for(y = [0:rows - 1]) [[0, cell_width * (y + 1)], [0, cell_width * y]]] : [],
+        buttom_walls = bottom_border ? [for(x = [0:columns - 1]) [[cell_width * x, 0], [cell_width * (x + 1), 0]]] : []
+    )
+     concat(
+        [
+            for(cell = cells) 
+            let(wall_pts = _square_walls(cell, cell_width))
+            if(wall_pts != []) 
+            len(wall_pts) == 4 ? [wall_pts[0], wall_pts[1], wall_pts[3]]: wall_pts
+        ]
+        , left_walls, buttom_walls
+    );