From d92f565b43b8575fea960b2dc90d0c2d75496409 Mon Sep 17 00:00:00 2001
From: Deepak Rangarajan <deepak.rangarajan@netl.doe.gov>
Date: Fri, 15 Apr 2022 17:48:47 -0400
Subject: [PATCH] fix bug when calculating 2d determinant

---
 src/csg/matrix_functions.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/csg/matrix_functions.cpp b/src/csg/matrix_functions.cpp
index 4294716..dafd08f 100644
--- a/src/csg/matrix_functions.cpp
+++ b/src/csg/matrix_functions.cpp
@@ -2,7 +2,7 @@
 
 namespace {
 double determinant(const matrix::Mat2d &m) {
-  return m[0][0] * m[1][1] - m[1][0] * m[1][1];
+  return m[0][0] * m[1][1] - m[1][0] * m[0][1];
 }
 
 double determinant(const matrix::Mat3d &m) {
-- 
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