From 3344806a9829c43761a7ca04f63b79168b96a156 Mon Sep 17 00:00:00 2001
From: xezon <4720891+xezon@users.noreply.github.com>
Date: Mon, 19 Jan 2026 22:32:43 +0100
Subject: [PATCH] perf(particlesys): Optimize angleBetween in Particle System

---
 .../Source/GameClient/System/ParticleSys.cpp          | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/Core/GameEngine/Source/GameClient/System/ParticleSys.cpp b/Core/GameEngine/Source/GameClient/System/ParticleSys.cpp
index 8a9d48e30e..273733e2ca 100644
--- a/Core/GameEngine/Source/GameClient/System/ParticleSys.cpp
+++ b/Core/GameEngine/Source/GameClient/System/ParticleSys.cpp
@@ -3454,16 +3454,17 @@ void ParticleSystemDebugDisplay( DebugDisplayInterface *dd, void *, FILE *fp )
 // ------------------------------------------------------------------------------------------------
 static Real angleBetween(const Coord2D *vecA, const Coord2D *vecB)
 {
-	if (!(vecA && vecA->length() && vecB && vecB->length())) {
-		return 0.0;
+	const Real lengthA = vecA->length();
+	const Real lengthB = vecB->length();
+
+	if (!(lengthA && lengthB)) {
+		return 0.0f;
 	}
 
-	Real lengthA = vecA->length();
-	Real lengthB = vecB->length();
 	Real dotProduct = (vecA->x * vecB->x + vecA->y * vecB->y);
 	Real cosTheta = dotProduct / (lengthA * lengthB);
 
-	// If the dotproduct is 0.0, then they are orthogonal
+	// If the dot product is 0.0, then they are orthogonal
 	if (dotProduct == 0.0f) {
 		if (vecB->x > 0) {
 			return PI;