1 files changed, 8 insertions, 4 deletions

diff --git a/external/include/glm/gtx/projection.hpp b/external/include/glm/gtx/projection.hpp
index fcddae8..9a24abf 100644
--- a/external/include/glm/gtx/projection.hpp
+++ b/external/include/glm/gtx/projection.hpp
@@ -6,15 +6,19 @@
 /// @defgroup gtx_projection GLM_GTX_projection
 /// @ingroup gtx
 ///
-/// @brief Projection of a vector to other one
+/// Include <glm/gtx/projection.hpp> to use the features of this extension.
 ///
-/// <glm/gtx/projection.hpp> need to be included to use these functionalities.
+/// Projection of a vector to other one
 
 #pragma once
 
 // Dependency:
 #include "../geometric.hpp"
 
+#ifndef GLM_ENABLE_EXPERIMENTAL
+#	error "GLM: GLM_GTX_projection is an experimental extension and may change in the future. Use #define GLM_ENABLE_EXPERIMENTAL before including it, if you really want to use it."
+#endif
+
 #if GLM_MESSAGES == GLM_MESSAGES_ENABLED && !defined(GLM_EXT_INCLUDED)
 #	pragma message("GLM: GLM_GTX_projection extension included")
 #endif
@@ -27,8 +31,8 @@ namespace glm
 	/// Projects x on Normal.
 	///
 	/// @see gtx_projection
-	template <typename vecType>
-	GLM_FUNC_DECL vecType proj(vecType const & x, vecType const & Normal);
+	template<typename genType>
+	GLM_FUNC_DECL genType proj(genType const& x, genType const& Normal);
 
 	/// @}
 }//namespace glm