1 files changed, 80 insertions, 0 deletions
diff --git a/src/include/glm/gtc/epsilon.inl b/src/include/glm/gtc/epsilon.inl
new file mode 100644
index 0000000..5c1b2ea
--- /dev/null
+++ b/src/include/glm/gtc/epsilon.inl
@@ -0,0 +1,80 @@
+/// @ref gtc_epsilon
+
+// Dependency:
+#include "../vector_relational.hpp"
+#include "../common.hpp"
+
+namespace glm
+{
+	template<>
+	GLM_FUNC_QUALIFIER bool epsilonEqual
+	(
+		float const& x,
+		float const& y,
+		float const& epsilon
+	)
+	{
+		return abs(x - y) < epsilon;
+	}
+
+	template<>
+	GLM_FUNC_QUALIFIER bool epsilonEqual
+	(
+		double const& x,
+		double const& y,
+		double const& epsilon
+	)
+	{
+		return abs(x - y) < epsilon;
+	}
+
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, bool, Q> epsilonEqual(vec<L, T, Q> const& x, vec<L, T, Q> const& y, T const& epsilon)
+	{
+		return lessThan(abs(x - y), vec<L, T, Q>(epsilon));
+	}
+
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, bool, Q> epsilonEqual(vec<L, T, Q> const& x, vec<L, T, Q> const& y, vec<L, T, Q> const& epsilon)
+	{
+		return lessThan(abs(x - y), vec<L, T, Q>(epsilon));
+	}
+
+	template<>
+	GLM_FUNC_QUALIFIER bool epsilonNotEqual(float const& x, float const& y, float const& epsilon)
+	{
+		return abs(x - y) >= epsilon;
+	}
+
+	template<>
+	GLM_FUNC_QUALIFIER bool epsilonNotEqual(double const& x, double const& y, double const& epsilon)
+	{
+		return abs(x - y) >= epsilon;
+	}
+
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, bool, Q> epsilonNotEqual(vec<L, T, Q> const& x, vec<L, T, Q> const& y, T const& epsilon)
+	{
+		return greaterThanEqual(abs(x - y), vec<L, T, Q>(epsilon));
+	}
+
+	template<length_t L, typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, bool, Q> epsilonNotEqual(vec<L, T, Q> const& x, vec<L, T, Q> const& y, vec<L, T, Q> const& epsilon)
+	{
+		return greaterThanEqual(abs(x - y), vec<L, T, Q>(epsilon));
+	}
+
+	template<typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<4, bool, Q> epsilonEqual(qua<T, Q> const& x, qua<T, Q> const& y, T const& epsilon)
+	{
+		vec<4, T, Q> v(x.x - y.x, x.y - y.y, x.z - y.z, x.w - y.w);
+		return lessThan(abs(v), vec<4, T, Q>(epsilon));
+	}
+
+	template<typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<4, bool, Q> epsilonNotEqual(qua<T, Q> const& x, qua<T, Q> const& y, T const& epsilon)
+	{
+		vec<4, T, Q> v(x.x - y.x, x.y - y.y, x.z - y.z, x.w - y.w);
+		return greaterThanEqual(abs(v), vec<4, T, Q>(epsilon));
+	}
+}//namespace glm