refactor

src/rounded_cube.scad

@@ -31,10 +31,11 @@ module rounded_cube(size, corner_r, center = false) {
     half_cube_leng = size / 2;
     half_leng = half_cube_leng - edge_d;
         
+    pair = [1, -1];
     corners = [
-        for(z = [1, -1]) 
-            for(y = [1, -1]) 
-                for(x = [1, -1]) 
+        for(z = pair) 
+            for(y = pair) 
+                for(x = pair) 
                     [half_l * x, half_w * y, half_h * z]
     ];