Added quaternion tests

test/gtc/gtc_quaternion.cpp

@@ -9,10 +9,81 @@
 
 #include <glm/glm.hpp>
 #include <glm/gtc/quaternion.hpp>
+#include <glm/gtx/epsilon.hpp>
+
+int test_quat_type()
+{
+    glm::quat A;
+    glm::dquat B;
+    
+    return 0;
+}
+
+int test_quat_slerp()
+{
+    int Error = 0;
+    
+    glm::quat A(0.0f, glm::vec3(0, 0, 1));
+    glm::quat B(90.0f, glm::vec3(0, 0, 1));
+    glm::quat C = glm::mix(A, B, 0.5f);
+    
+    Error += C != glm::quat(45.f, glm::vec3(0, 0, 1)) ? 0 : 1;
+    
+    return Error;
+}
+
+int test_quat_length()
+{
+    int Error = 0;
+    
+    float A = glm::length(glm::quat(45.0f, glm::vec3(0, 0, 1)));
+    Error += A == 1.0f ? 0 : 1;
+    float B = glm::length(glm::quat(90.0f, glm::vec3(0, 0, 2)));
+    Error += B == 2.0f ? 0 : 1;
+    
+    return Error;
+}
+
+int test_quat_normalize()
+{
+    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_type();
+    Error += test_quat_slerp();
+    Error += test_quat_length();
+    Error += test_quat_normalize();
 
 	return Error;
 }