From 1af1bea83707112e80c12d9733aaf37be94246be Mon Sep 17 00:00:00 2001
From: Dave Reid <davidreid@galicktech.com.au>
Date: Sat, 22 Dec 2012 13:16:37 +1000
Subject: [PATCH] Add static xpos, xneg, ypos, etc constants to tvec3 as
 requested in issue #21.

I've also included corresponding right, left, up, down, backward and forward constants. The z coordinate for 'forward' is set to -1, as one would expect with OpenGL.
---
 glm/core/type_vec3.hpp | 18 ++++++++++++++++++
 glm/core/type_vec3.inl | 20 ++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/glm/core/type_vec3.hpp b/glm/core/type_vec3.hpp
index fa6e357c..8e38b6b4 100644
--- a/glm/core/type_vec3.hpp
+++ b/glm/core/type_vec3.hpp
@@ -244,6 +244,24 @@ namespace detail
 		GLM_FUNC_DECL tvec4<T> swizzle(comp X, comp Y, comp Z, comp W) const;
 		GLM_FUNC_DECL tref2<T> swizzle(comp X, comp Y);
 		GLM_FUNC_DECL tref3<T> swizzle(comp X, comp Y, comp Z);
+
+
+        //////////////////////////////////////
+		// Static constants
+
+        static const tvec3<T> xpos;
+        static const tvec3<T> xneg;
+        static const tvec3<T> ypos;
+        static const tvec3<T> yneg;
+        static const tvec3<T> zpos;
+        static const tvec3<T> zneg;
+
+        static const tvec3<T> right;
+        static const tvec3<T> left;
+        static const tvec3<T> up;
+        static const tvec3<T> down;
+        static const tvec3<T> backward;
+        static const tvec3<T> forward;
 	};
 
 	template <typename T>
diff --git a/glm/core/type_vec3.inl b/glm/core/type_vec3.inl
index 566266a9..ed41f9ab 100644
--- a/glm/core/type_vec3.inl
+++ b/glm/core/type_vec3.inl
@@ -1148,5 +1148,25 @@ namespace detail
 		return tvec3<T>(this->x, this->y, this->z);
 	}
 
+
+
+    //////////////////////////////////////
+	// Static constants
+
+    template <typename T> const tvec3<T> tvec3<T>::xpos     = tvec3<T>(T( 1), T( 0), T (0));
+    template <typename T> const tvec3<T> tvec3<T>::xneg     = tvec3<T>(T(-1), T( 0), T( 0));
+    template <typename T> const tvec3<T> tvec3<T>::ypos     = tvec3<T>(T( 0), T( 1), T( 0));
+    template <typename T> const tvec3<T> tvec3<T>::yneg     = tvec3<T>(T( 0), T(-1), T( 0));
+    template <typename T> const tvec3<T> tvec3<T>::zpos     = tvec3<T>(T( 0), T( 0), T( 1));
+    template <typename T> const tvec3<T> tvec3<T>::zneg     = tvec3<T>(T( 0), T( 0), T(-1));
+
+    template <typename T> const tvec3<T> tvec3<T>::right    = tvec3<T>(T( 1), T( 0), T( 0));
+    template <typename T> const tvec3<T> tvec3<T>::left     = tvec3<T>(T(-1), T( 0), T( 0));
+    template <typename T> const tvec3<T> tvec3<T>::up       = tvec3<T>(T( 0), T( 1), T( 0));
+    template <typename T> const tvec3<T> tvec3<T>::down     = tvec3<T>(T( 0), T(-1), T( 0));
+    template <typename T> const tvec3<T> tvec3<T>::backward = tvec3<T>(T( 0), T( 0), T( 1));
+    template <typename T> const tvec3<T> tvec3<T>::forward  = tvec3<T>(T( 0), T( 0), T(-1));
+
+
 }//namespace detail
 }//namespace glm