refactor

src/experimental/mz_hamiltonian.scad

@@ -26,6 +26,6 @@ function mz_hamiltonian(rows, columns, start) =
             [for(x = [0:columns * 2 - 1]) [x, 0]],
             [for(y = [0:rows * 2 - 1]) [0, y]]
         ),
-        dot_pts = dedup(sort(sort(all, by = "x"), by = "y"), sorted = true)
+        dot_pts = dedup(sort(all, by = "vt"), sorted = true)
     )
     _mz_hamiltonian_travel(dot_pts, start, rows * columns * 4);

src/experimental/px_surround.scad

@@ -4,7 +4,7 @@ use <util/sort.scad>;
 function px_surround(points) = 
     let(
         // always start from the left-bottom pt
-        sortedXY = sort(sort(points, by = "x"), by = "y"),
+        sortedXY = sort(points, by = "vt"),
         fst = sortedXY[0] + [-1, -1]
     )
     _px_surround_travel(sortedXY, fst, fst);

src/pixel/px_circle.scad

@@ -14,4 +14,4 @@ use <util/dedup.scad>;
 
 function px_circle(radius, filled = false) = 
     let(all = _px_circle_impl(radius, filled))
-    dedup(sort(sort(all, by = "x"), by = "y"), sorted = true);
+    dedup(sort(all, by = "vt"), sorted = true);

src/pixel/px_cylinder.scad

@@ -14,4 +14,4 @@ use <util/dedup.scad>;
 
 function px_cylinder(r, h, filled = false, thickness = 1) =
     let(all = _px_cylinder_impl(r, h, filled, thickness))
-    dedup(sort(sort(sort(all, by = "x"), by = "y"), by = "z"), sorted = true);
+    dedup(sort(all, by = "vt"), sorted = true);

src/pixel/px_polygon.scad

@@ -7,7 +7,7 @@ function px_polygon(points, filled = false) =
     let(contour = px_polyline(concat(points, [points[0]])))
     !filled ? contour :
     let(
-        sortedXY = sort(sort(contour, by = "x"), by = "y"),
+        sortedXY = sort(contour, by = "vt"),
         ys = [for(p = sortedXY) p[1]],
         rows = [
             for(y = [min(ys):max(ys)])

src/pixel/px_polyline.scad

@@ -22,7 +22,7 @@ function px_polyline(points) =
         polyline = [for(line =  __lines_from(pts)) each px_line(line[0], line[1])]
     )
     dedup(is_2d ? 
-        sort(sort([for(pt = polyline) __to2d(pt)], by = "x"), by = "y")
+        sort([for(pt = polyline) __to2d(pt)], by = "vt")
          : 
-        sort(sort(sort(polyline, by = "x"), by = "y"), by = "z")
+        sort(polyline, by = "vt")
     , sorted = true);