From 471c27e126f6934cdba0d0ce5dcbf8f72386b0fe Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Crozet?= <sebcrozet@dimforge.com>
Date: Sun, 14 Apr 2024 15:46:44 +0200
Subject: [PATCH] feat: add SdpMatrix2::inverse_and_get_determinant_unchecked

---
 src/utils/sdp_matrix.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/utils/sdp_matrix.rs b/src/utils/sdp_matrix.rs
index 0de2cfe8..50b4130b 100644
--- a/src/utils/sdp_matrix.rs
+++ b/src/utils/sdp_matrix.rs
@@ -70,12 +70,17 @@ impl<N: SimdRealField + Copy> SdpMatrix2<N> {
 
     /// Compute the inverse of this SDP matrix without performing any inversibility check.
     pub fn inverse_unchecked(&self) -> Self {
+        self.inverse_and_get_determinant_unchecked().0
+    }
+
+    /// Compute the inverse of this SDP matrix without performing any inversibility check.
+    pub fn inverse_and_get_determinant_unchecked(&self) -> (Self, N) {
         let determinant = self.m11 * self.m22 - self.m12 * self.m12;
         let m11 = self.m22 / determinant;
         let m12 = -self.m12 / determinant;
         let m22 = self.m11 / determinant;
 
-        Self { m11, m12, m22 }
+        (Self { m11, m12, m22 }, determinant)
     }
 
     /// Convert this SDP matrix to a regular matrix representation.