From 3419aef6778d5b1d9ed61e6d63d11c44f29ef8e1 Mon Sep 17 00:00:00 2001
From: Alexander Heinrich <AlxHnr@users.noreply.github.com>
Date: Tue, 13 Dec 2022 18:59:00 +0100
Subject: [PATCH] Fix Vector2Angle() (#2829)

With this fix the function still returns negative values, which is
wrong. But we keep this behaviour to maintain backwards compatibility.
---
 src/raymath.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/raymath.h b/src/raymath.h
index fbe4ceadc..34db2d885 100644
--- a/src/raymath.h
+++ b/src/raymath.h
@@ -309,7 +309,7 @@ RMAPI float Vector2DistanceSqr(Vector2 v1, Vector2 v2)
 // Calculate angle from two vectors
 RMAPI float Vector2Angle(Vector2 v1, Vector2 v2)
 {
-    float result = atan2f(v2.y, v2.x) - atan2f(v1.y, v1.x);
+    float result = -acos(v1.x*v2.x + v1.y*v2.y);
 
     return result;
 }