From 6284b8117ce0d1d52b50223ebfba98abb112b4f7 Mon Sep 17 00:00:00 2001
From: Bukkit/Spigot <noreply+git-bukkit@papermc.io>
Date: Mon, 3 Jan 2011 17:55:42 +0800
Subject: [PATCH] Made Vector.equals() fuzzy.

By: sk89q <the.sk89q@gmail.com>
---
 .../src/main/java/org/bukkit/Vector.java      | 24 ++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/paper-api/src/main/java/org/bukkit/Vector.java b/paper-api/src/main/java/org/bukkit/Vector.java
index b5ee2bde60..11b56f4098 100644
--- a/paper-api/src/main/java/org/bukkit/Vector.java
+++ b/paper-api/src/main/java/org/bukkit/Vector.java
@@ -8,6 +8,11 @@ package org.bukkit;
 public class Vector implements Cloneable {
     private static final long serialVersionUID = -2657651106777219169L;
     
+    /**
+     * Threshold for fuzzy equals().
+     */
+    private static final double epsilon = 0.000001;
+    
     protected double x;
     protected double y;
     protected double z;
@@ -321,6 +326,10 @@ public class Vector implements Cloneable {
         return this;
     }
 
+    /**
+     * Checks to see if two objects are equal. Only two Vectors can ever
+     * return true
+     */
     @Override
     public boolean equals(Object obj) {
         if (!(obj instanceof Vector)) {
@@ -329,9 +338,9 @@ public class Vector implements Cloneable {
         
         Vector other = (Vector)obj;
         
-        return Double.doubleToLongBits(x) == Double.doubleToLongBits(other.x)
-            && Double.doubleToLongBits(y) == Double.doubleToLongBits(other.y)
-            && Double.doubleToLongBits(z) == Double.doubleToLongBits(other.z);
+        return Math.abs(x - other.x) < epsilon
+                && Math.abs(y - other.y) < epsilon
+                && Math.abs(z - other.z) < epsilon;
     }
 
     @Override
@@ -359,6 +368,15 @@ public class Vector implements Cloneable {
         return new Location(world, x, y, z, yaw, pitch);
     }
     
+    /**
+     * Get the threshold used for equals().
+     * 
+     * @return
+     */
+    public static double getEpsilon() {
+        return epsilon;
+    }
+    
     /**
      * Gets the minimum components of two vectors.
      *