Added quaternion tests

test/gtx/gtx_quaternion.cpp

@@ -1,18 +1,53 @@
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 // OpenGL Mathematics Copyright (c) 2005 - 2011 G-Truc Creation (www.g-truc.net)
 ///////////////////////////////////////////////////////////////////////////////////////////////////
-// Created : 2010-09-16
-// Updated : 2010-05-07
+// Created : 2011-05-25
+// Updated : 2011-05-25
 // Licence : This source is under MIT licence
-// File    : test/gtc/quaternion.cpp
+// File    : test/gtx/quaternion.cpp
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 #include <glm/glm.hpp>
-#include <glm/gtc/quaternion.hpp>
+#include <glm/gtx/quaternion.hpp>
+#include <glm/gtx/epsilon.hpp>
+
+int test_quat_angle()
+{
+    int Error = 0;
+    
+    {
+        glm::quat Q(45.0f, glm::vec3(0, 0, 1));
+        glm::quat N = glm::normalize(Q);
+        float L = glm::length(N);
+        Error += L == 1.0f ? 0 : 1;
+        float A = glm::angle(N);
+        Error += glm::equalEpsilon(A, 45.0f, 0.01f) ? 0 : 1;
+    }
+    {
+        glm::quat Q(45.0f, glm::vec3(0, 0, 2));
+        glm::quat N = glm::normalize(Q);
+        float L = glm::length(N);
+        Error += L == 1.0f ? 0 : 1;
+        float A = glm::angle(N);
+        Error += glm::equalEpsilon(A, 45.0f, 0.01f) ? 0 : 1;
+    }
+    {
+        glm::quat Q(45.0f, glm::vec3(1, 2, 3));
+        glm::quat N = glm::normalize(Q);
+        float L = glm::length(N);
+        Error += L == 1.0f ? 0 : 1;
+        float A = glm::angle(N);
+        Error += glm::equalEpsilon(A, 45.0f, 0.01f) ? 0 : 1;
+    }
+    
+    return Error;
+}
 
 int main()
 {
 	int Error = 0;
+    
+    Error += test_quat_angle();
 
 	return Error;
 }