From 76c8c8806e3a3e58f6a5f6319925b36ffe39500c Mon Sep 17 00:00:00 2001
From: Paul Chote <paul@chote.net>
Date: Tue, 22 Oct 2013 22:22:09 +1300
Subject: [PATCH] Remove desyncing fp from WPos.LerpQuadratic. Fixes #3966.

---
 OpenRA.FileFormats/WPos.cs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/OpenRA.FileFormats/WPos.cs b/OpenRA.FileFormats/WPos.cs
index 7ccc4d22f2..589b3c003a 100644
--- a/OpenRA.FileFormats/WPos.cs
+++ b/OpenRA.FileFormats/WPos.cs
@@ -47,8 +47,8 @@ namespace OpenRA
 				return ret;
 
 			// Add an additional quadratic variation to height
-			// Uses fp to avoid integer overflow
-			var offset = (int)((float)((float)(b - a).Length*pitch.Tan()*mul*(div - mul)) / (float)(1024*div*div));
+			// Attempts to avoid integer overflow by keeping the intermediate variables reasonably sized
+			var offset = (int)(((((((long)(b - a).Length * mul) / div) * (div - mul)) / div) * pitch.Tan()) / 1024);
 			return new WPos(ret.X, ret.Y, ret.Z + offset);
 		}