Renamed equalEpsilon function into epsilonEqual and added tests

test/gtc/gtc_constants.cpp

@@ -14,7 +14,7 @@ int main()
 {
 	int Error(0);
 
-
+    
 
 	return Error;
 }

test/gtc/gtc_epsilon.cpp

@@ -8,13 +8,55 @@
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 #include <glm/glm.hpp>
+#include <glm/gtc/half_float.hpp>
 #include <glm/gtc/epsilon.hpp>
+#include <glm/gtc/constants.hpp>
+
+template <typename T>
+int test_equal()
+{
+	int Error(0);
+	
+    {
+        T A = glm::epsilon<T>();
+        T B = glm::epsilon<T>();
+        Error += glm::epsilonEqual(A, B, glm::epsilon<T>()) ? 0 : 1;
+    }
+  
+    {
+        T A(0);
+        T B = T(0) + glm::epsilon<T>();
+        Error += glm::epsilonEqual(A, B, glm::epsilon<T>()) ? 0 : 1;
+    }
+ 
+    {
+        T A(0);
+        T B = T(0) - glm::epsilon<T>();
+        Error += glm::epsilonEqual(A, B, glm::epsilon<T>()) ? 0 : 1;
+    }
+   
+    {
+        T A = T(0) + glm::epsilon<T>();
+        T B = T(0);
+        Error += glm::epsilonEqual(A, B, glm::epsilon<T>()) ? 0 : 1;
+    }
+    
+    {
+        T A = T(0) - glm::epsilon<T>();
+        T B = T(0);
+        Error += glm::epsilonEqual(A, B, glm::epsilon<T>()) ? 0 : 1;
+    }
+    
+	return Error;
+}
 
 int main()
 {
 	int Error(0);
 
-
+    Error += test_equal<glm::half>();
+    Error += test_equal<float>();
+    Error += test_equal<double>();
 
 	return Error;
 }