From 39985f36e807126b2c7b9ec6096bda3922903a54 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sun, 15 Dec 2024 14:38:00 +0000
Subject: 2D triangle area support

---
 lib/triangle.h | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'lib/triangle.h')

diff --git a/lib/triangle.h b/lib/triangle.h
index 812bfab..5787094 100644
--- a/lib/triangle.h
+++ b/lib/triangle.h
@@ -31,6 +31,13 @@ struct Triangle : public glm::vec<3, glm::vec<Dim, T, Q>> {
 		return glm::length(crossProduct(sideDifference(1), sideDifference(2))) / T {2};
 	}
 
+	[[nodiscard]] constexpr auto
+	area() const
+		requires(Dim == 2)
+	{
+		return std::abs((sideDifference(1).x * sideDifference(2).y) - (sideDifference(2).x * sideDifference(1).y)) / 2;
+	}
+
 	[[nodiscard]] constexpr Normal3D
 	normal() const
 		requires(Dim == 3)
-- 
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