From eb5cdb04efc9984d0937b65620606f8043dd1831 Mon Sep 17 00:00:00 2001
From: ancarola <raffaele.ancarola@epfl.ch>
Date: Wed, 10 Jul 2019 10:24:37 +0200
Subject: Implicit convertion to basic_vec to vec2 or vec3

---
 include/mm/mmvec.hpp | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'include/mm/mmvec.hpp')

diff --git a/include/mm/mmvec.hpp b/include/mm/mmvec.hpp
index 1939388..da9040d 100644
--- a/include/mm/mmvec.hpp
+++ b/include/mm/mmvec.hpp
@@ -44,6 +44,27 @@ struct mm::basic_vec : public std::array<T, d> {
     using type = T;
     static constexpr std::size_t dimensions = d;
 
+    // convertions 
+    static inline constexpr bool is_vec2() {
+        return d == 2;
+    }
+
+    static inline constexpr bool is_vec3() {
+        return d == 3;
+    }
+
+    operator mm::vec2<T>()
+    {
+        static_assert(is_vec2(), "Invalid cast to two dimensional vector");
+        return static_cast<mm::vec2<T>>(*this);
+    }
+
+    operator mm::vec3<T>()
+    {
+        static_assert(is_vec3(), "Invalid cast to three dimensional vector");
+        return static_cast<mm::vec3<T>>(*this);
+    }
+
     // TODO: template away these
     static constexpr T null_element = static_cast<T>(0);
     static constexpr T unit_element = static_cast<T>(1);
-- 
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