From 5d4f17da3a077951fa2c54cd656455b79476e6cb Mon Sep 17 00:00:00 2001
From: Antonis Geralis <43617260+planetis-m@users.noreply.github.com>
Date: Thu, 15 Dec 2022 12:39:26 +0200
Subject: [PATCH] Fix vector2angle

---
 src/raymath.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/raymath.h b/src/raymath.h
index 34db2d885..9175bbc21 100644
--- a/src/raymath.h
+++ b/src/raymath.h
@@ -307,9 +307,13 @@ RMAPI float Vector2DistanceSqr(Vector2 v1, Vector2 v2)
 }
 
 // Calculate angle from two vectors
+// Parameters need to be normalized
 RMAPI float Vector2Angle(Vector2 v1, Vector2 v2)
 {
-    float result = -acos(v1.x*v2.x + v1.y*v2.y);
+    float dotProduct = v1.x*v2.x + v1.y*v2.y;
+
+    float t = dotProduct < -1 ? -1 : dotProduct;
+    float result = acos(t > max ? max : t;);
 
     return result;
 }