add px_intersection

src/experimental/px_intersection.scad

@@ -0,0 +1,11 @@
+use <util/sort.scad>;
+use <util/has.scad>;
+
+function px_intersection(points1, points2) =
+    let(
+        leng1 = len(points1),
+        leng2 = len(points2),
+        pts_pair = leng1 > leng2 ? [points1, points2] : [points2, points1],
+        sorted = sort(pts_pair[1], by = "vt")
+    )
+    [for(p = pts_pair[0]) if(has(sorted, p, sorted = true)) p];