From 23ed306148a4436a5d8b852f765c2afd6dc76b0b Mon Sep 17 00:00:00 2001
From: Justin Lin <justin.sdk@gmail.com>
Date: Tue, 7 Sep 2021 15:59:11 +0800
Subject: [PATCH] performance improved

---
 src/voxel/vx_union.scad | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/voxel/vx_union.scad b/src/voxel/vx_union.scad
index 34363212..a7ff6a28 100644
--- a/src/voxel/vx_union.scad
+++ b/src/voxel/vx_union.scad
@@ -8,6 +8,13 @@
 *
 **/ 
 
+use <../__comm__/_pt3_hash.scad>;
 use <../util/dedup.scad>;
 
-function vx_union(points1, points2) = dedup(concat(points1, points2));
\ No newline at end of file
+function vx_union(points1, points2) = 
+    let(
+        pts = concat(points1, points2),
+        number_of_buckets = ceil(sqrt(len(pts))),
+        hash = _pt3_hash(number_of_buckets)
+    )
+    dedup(pts, hash = hash, number_of_buckets = number_of_buckets);
\ No newline at end of file