Added epsilon constant and improved queries... still probably broken, need extra test

test/gtx/CMakeLists.txt

@@ -1,6 +1,7 @@
 glmCreateTestGTC(gtx_bit)
 glmCreateTestGTC(gtx_gradient_paint)
 glmCreateTestGTC(gtx_integer)
+glmCreateTestGTC(gtx_matrix_query)
 glmCreateTestGTC(gtx_noise)
 glmCreateTestGTC(gtx_quaternion)
 glmCreateTestGTC(gtx_random)

test/gtx/gtx_matrix_query.cpp

@@ -0,0 +1,54 @@
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// OpenGL Mathematics Copyright (c) 2005 - 2011 G-Truc Creation (www.g-truc.net)
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Created : 2011-11-22
+// Updated : 2011-11-22
+// Licence : This source is under MIT licence
+// File    : test/gtx/matrix_query.cpp
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+#include <glm/glm.hpp>
+#include <glm/gtx/matrix_query.hpp>
+
+int test_isNull()
+{
+    int Error(0);
+    
+	bool TestA = glm::isNull(glm::mat4(0), 0.00001f);
+    Error += TestA ? 0 : 1;
+
+    return Error;
+}
+
+int test_isNormalized()
+{
+    int Error(0);
+    
+	bool TestA = glm::isNormalized(glm::mat4(1), 0.00001f);
+    Error += TestA ? 0 : 1;
+
+    return Error;
+}
+
+int test_isOrthogonal()
+{
+    int Error(0);
+    
+	bool TestA = glm::isOrthogonal(glm::mat4(1), 0.00001f);
+    Error += TestA ? 0 : 1;
+
+    return Error;
+}
+
+int main()
+{
+	int Error(0);
+
+	Error += test_isNull();
+	Error += test_isNormalized();
+	Error += test_isOrthogonal();
+
+	return Error;
+}
+
+