From 301c9572f887f801b027e43cfc4121e4fd520828 Mon Sep 17 00:00:00 2001
From: Thinkofdeath <thinkofdeath@spigotmc.org>
Date: Mon, 15 Feb 2016 23:16:00 -0600
Subject: [PATCH] Fix FurnaceMinecarts losing all of their velocity on certain
 corners


diff --git a/src/main/java/net/minecraft/server/EntityMinecartFurnace.java b/src/main/java/net/minecraft/server/EntityMinecartFurnace.java
index 55f04b4..908620d 100644
--- a/src/main/java/net/minecraft/server/EntityMinecartFurnace.java
+++ b/src/main/java/net/minecraft/server/EntityMinecartFurnace.java
@@ -58,17 +58,12 @@ public class EntityMinecartFurnace extends EntityMinecartAbstract {
 
         if (d0 > 1.0E-4D && this.motX * this.motX + this.motZ * this.motZ > 0.001D) {
             d0 = (double) MathHelper.sqrt(d0);
-            this.a /= d0;
-            this.b /= d0;
-            if (this.a * this.motX + this.b * this.motZ < 0.0D) {
-                this.a = 0.0D;
-                this.b = 0.0D;
-            } else {
-                double d1 = d0 / this.m();
-
-                this.a *= d1;
-                this.b *= d1;
-            }
+            // PaperSpigot - Don't lose all your velocity on corners
+            // https://bugs.mojang.com/browse/MC-51053?focusedCommentId=223854
+            double d1 = (double) MathHelper.sqrt(this.motX * this.motX + this.motZ * this.motZ);
+            this.a = (motX / d1) * d0;
+            this.b = (motZ / d1) * d0;
+            // PaperSpigot end
         }
 
     }
-- 
2.7.1