From d5e5fdeffae3f9f1ad6097ad980da1a035a23a10 Mon Sep 17 00:00:00 2001
From: Gleb Mazovetskiy <glex.spb@gmail.com>
Date: Wed, 1 Nov 2023 23:53:48 +0000
Subject: [PATCH] `Displacement#distance`: Use a naive hypot impl

`std::hypot` is much slower than a naive implementation.
It has the advantage of extra precision but we don't need that at all.
---
 Source/engine/displacement.hpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Source/engine/displacement.hpp b/Source/engine/displacement.hpp
index f636bd6b0..5d2cca73f 100644
--- a/Source/engine/displacement.hpp
+++ b/Source/engine/displacement.hpp
@@ -120,7 +120,8 @@ struct DisplacementOf {
 
 	float magnitude() const
 	{
-		return static_cast<float>(hypot(deltaX, deltaY));
+		// We do not use `std::hypot` here because it is slower and we do not need the extra precision.
+		return sqrtf(deltaX * deltaX + deltaY * deltaY);
 	}
 
 	/**