From ab4bc4ae3067aa038cdb20e4fff0542addaac564 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Konstantin=20Ka=CC=88fer?= <mail@kkaefer.com>
Date: Wed, 21 May 2014 19:23:20 +0200
Subject: [PATCH] add vec2 * mat4 multiplication

---
 include/llmr/util/vec.hpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/llmr/util/vec.hpp b/include/llmr/util/vec.hpp
index 770776160..828a6a5fb 100644
--- a/include/llmr/util/vec.hpp
+++ b/include/llmr/util/vec.hpp
@@ -5,6 +5,7 @@
 #include <type_traits>
 #include <cmath>
 #include <cstdint>
+#include <array>
 
 namespace llmr {
 
@@ -47,6 +48,10 @@ struct vec2 {
         y *= o;
     }
 
+    inline vec2<T> operator *(const std::array<float, 16>& matrix) {
+        return { x * matrix[0] + y * matrix[4] + matrix[12], x * matrix[1] + y * matrix[5] + matrix[13] };
+    }
+
     template <typename O>
     inline typename std::enable_if<std::is_arithmetic<O>::value, vec2>::type
     operator-(O o) const {