From cd8bd144f6d4638b56c1c189f2e81a64e32c1638 Mon Sep 17 00:00:00 2001
From: Eryn Wells <eryn@erynwells.me>
Date: Thu, 12 Nov 2015 23:19:14 -0800
Subject: [PATCH] [Math] Fix Matrix-Vector multiplication

---
 Math/Math/Matrix.swift | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Math/Math/Matrix.swift b/Math/Math/Matrix.swift
index d4c3ea6..d6e68df 100644
--- a/Math/Math/Matrix.swift
+++ b/Math/Math/Matrix.swift
@@ -292,10 +292,10 @@ public func *<T: Matrix>(lhs: T, rhs: T) -> T {
 // MARK: Matrix-Vector multiplication
 
 public func *(lhs: Matrix4, rhs: Vector4) -> Vector4 {
-    var out = Vector4()
+    var out = Vector4(x: 0.0, y: 0.0, z: 0.0, w: 0.0)
     for i in 0..<Matrix4.dimension {
         for j in 0..<Matrix4.dimension {
-            out[i] += lhs[i] * rhs[j]
+            out[i] += lhs[i*Matrix4.dimension + j] * rhs[j]
         }
     }
     return out