Update GLM to latest version (0.9.9.3). This includes GLM's change of matrices no longer default initializing to the identity matrix. This commit thus also includes the update of all of LearnOpenGL's code to reflect this: all matrices are now constructor-initialized to the identity matrix where relevant.

includes/glm/ext/scalar_relational.hpp

@@ -0,0 +1,65 @@
+/// @ref ext_scalar_relational
+/// @file glm/ext/scalar_relational.hpp
+///
+/// @defgroup ext_scalar_relational GLM_EXT_scalar_relational
+/// @ingroup ext
+///
+/// Exposes comparison functions for scalar types that take a user defined epsilon values.
+///
+/// Include <glm/ext/scalar_relational.hpp> to use the features of this extension.
+///
+/// @see core_vector_relational
+/// @see ext_vector_relational
+/// @see ext_matrix_relational
+
+#pragma once
+
+// Dependencies
+#include "../detail/qualifier.hpp"
+
+#if GLM_MESSAGES == GLM_ENABLE && !defined(GLM_EXT_INCLUDED)
+#	pragma message("GLM: GLM_EXT_scalar_relational extension included")
+#endif
+
+namespace glm
+{
+	/// Returns the component-wise comparison of |x - y| < epsilon.
+	/// True if this expression is satisfied.
+	///
+	/// @tparam genType Floating-point or integer scalar types
+	template<typename genType>
+	GLM_FUNC_DECL GLM_CONSTEXPR bool equal(genType const& x, genType const& y, genType const& epsilon);
+
+	/// Returns the component-wise comparison of |x - y| >= epsilon.
+	/// True if this expression is not satisfied.
+	///
+	/// @tparam genType Floating-point or integer scalar types
+	template<typename genType>
+	GLM_FUNC_DECL GLM_CONSTEXPR bool notEqual(genType const& x, genType const& y, genType const& epsilon);
+
+	/// Returns the component-wise comparison between two scalars in term of ULPs.
+	/// True if this expression is satisfied.
+	///
+	/// @param x First operand.
+	/// @param y Second operand.
+	/// @param ULPs Maximum difference in ULPs between the two operators to consider them equal.
+	///
+	/// @tparam genType Floating-point or integer scalar types
+	template<typename genType>
+	GLM_FUNC_DECL GLM_CONSTEXPR bool equal(genType const& x, genType const& y, int ULPs);
+
+	/// Returns the component-wise comparison between two scalars in term of ULPs.
+	/// True if this expression is not satisfied.
+	///
+	/// @param x First operand.
+	/// @param y Second operand.
+	/// @param ULPs Maximum difference in ULPs between the two operators to consider them not equal.
+	///
+	/// @tparam genType Floating-point or integer scalar types
+	template<typename genType>
+	GLM_FUNC_DECL GLM_CONSTEXPR bool notEqual(genType const& x, genType const& y, int ULPs);
+
+	/// @}
+}//namespace glm
+
+#include "scalar_relational.inl"