add mz_hexwalls

src/maze/mz_hexwalls.scad

@@ -0,0 +1,47 @@
+/**
+* mz_hexwalls.scad
+*
+* @copyright Justin Lin, 2020
+* @license https://opensource.org/licenses/lgpl-3.0.html
+*
+* @see https://openhome.cc/eGossip/OpenSCAD/lib3x-mz_hexwalls.html
+*
+**/
+
+use <_impl/_mz_hex_walls.scad>;
+
+function mz_hexwalls(cells, cell_radius, left_border = true, bottom_border = true) = 
+    let(
+        rows = len([for(cell = cells) if(cell.x == 0) undef]),
+        columns = len([for(cell = cells) if(cell.y == 0) undef])
+    )
+    [
+        each [for(cell = cells, wall = _build_cell(cell_radius, cell)) wall],
+
+        if(left_border) each [
+            for(y = [0:rows - 1]) 
+            let(
+                cell_p = _cell_position(cell_radius, 0, y),
+                walls1 = _top_left(cell_radius),
+                walls2 = _bottom_left(cell_radius)
+            )
+            each [
+                [walls1[0] + cell_p, walls1[1] + cell_p], 
+                [walls2[0] + cell_p, walls2[1] + cell_p]
+            ]   
+        ],
+
+        if(bottom_border) each [
+            for(x = [0:columns - 1]) 
+            let(
+                cell_p = _cell_position(cell_radius, x, 0),
+                walls1 = _bottom(cell_radius)
+            )
+            each [
+                [walls1[0] + cell_p, walls1[1] + cell_p], 
+                if(x % 2 == 0)
+                let(walls2 = [each _bottom_left(cell_radius), each _bottom_right(cell_radius)])
+                [walls2[0] + cell_p, walls2[1] + cell_p]
+            ]
+        ]
+    ];