From 6599c41b14022a40d0aaafa2f87236cf06735aec Mon Sep 17 00:00:00 2001
From: jbb01 <32650546+jbb01@users.noreply.github.com>
Date: Thu, 8 Aug 2024 21:58:51 +0200
Subject: [PATCH] add a check to Vec3#unit to avoid unnecessary sqrt and
 division

---
 src/main/java/eu/jonahbauer/raytracing/math/Vec3.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/main/java/eu/jonahbauer/raytracing/math/Vec3.java b/src/main/java/eu/jonahbauer/raytracing/math/Vec3.java
index 7641756..7213c96 100644
--- a/src/main/java/eu/jonahbauer/raytracing/math/Vec3.java
+++ b/src/main/java/eu/jonahbauer/raytracing/math/Vec3.java
@@ -270,7 +270,9 @@ public record Vec3(double x, double y, double z) {
      * {@return a unit vector with the same direction as this vector}
      */
     public @NotNull Vec3 unit() {
-        return div(length());
+        var squared = squared();
+        if (squared == 1) return this;
+        return div(Math.sqrt(squared));
     }
 
     /**