From 2232b23904bea3599fd7b820fa60ba18152da0b4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=88=E6=B5=B7?=
 <33588331+chenhai998@users.noreply.github.com>
Date: Tue, 18 Feb 2025 08:53:52 +0000
Subject: [PATCH] Fix  typo on computing mid

---
 3dgs.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/3dgs.py b/3dgs.py
index 3289a45..5e75a42 100644
--- a/3dgs.py
+++ b/3dgs.py
@@ -158,7 +158,7 @@ def preprocess(
 
             # compute radius, by finding eigenvalues of 2d covariance
             # transfrom point from NDC to Pixel
-            mid = 0.5 * (cov[0] + cov[1])
+            mid = 0.5 * (cov[0] + cov[2])
             lambda1 = mid + sqrt(max(0.1, mid * mid - det))
             lambda2 = mid - sqrt(max(0.1, mid * mid - det))
             my_radius = ceil(3 * sqrt(max(lambda1, lambda2)))