From 88e0876d2fb49449af5ac360c3510049df1e4095 Mon Sep 17 00:00:00 2001
From: Justin Lin <caterpillar@openhome.cc>
Date: Wed, 12 Feb 2020 20:29:24 +0800
Subject: [PATCH] refactor

---
 examples/maze/twisted_maze.scad | 19 ++++---------------
 1 file changed, 4 insertions(+), 15 deletions(-)

diff --git a/examples/maze/twisted_maze.scad b/examples/maze/twisted_maze.scad
index deb7a513..6c08ff15 100644
--- a/examples/maze/twisted_maze.scad
+++ b/examples/maze/twisted_maze.scad
@@ -1,6 +1,7 @@
 use <hull_polyline3d.scad>;
 use <rotate_p.scad>;
 use <square_maze.scad>;
+use <experimental/tf_y_twist.scad>;
 
 rows = 16;
 columns = 8;
@@ -9,23 +10,11 @@ wall_thickness = 1;
 angle = 180;
 // $fn = 24;
 
-function tf_twist(size, p, ) =
-
 function y_twist(walls, angle, rows, columns, block_width) = 
-    let(
-        x_offset = columns * block_width / 2,
-        x_centered = [
-            for(wall_pts = walls) 
-                [for(pt = wall_pts) [pt[0], pt[1], 0] + [-x_offset, 0, 0]]
-        ],
-        a_step = angle / (rows * block_width)
-    )
+    let(size = [columns * block_width, rows * block_width])
     [
-        for(wall_pts = x_centered)    
-           [
-               for(pt = wall_pts)
-                   rotate_p(pt, [0, pt[1] * a_step, 0]) + [x_offset, 0, 0]
-           ]
+        for(wall_pts = walls) 
+            [for(pt = wall_pts) tf_y_twist(size, pt, angle)]
     ];
 
 blocks = go_maze(