Adding libraries and dependencies for easy portability

Include/glm/test/gtx/gtx_vector_angle.cpp

@@ -0,0 +1,59 @@
+#define GLM_ENABLE_EXPERIMENTAL
+#include <glm/gtc/constants.hpp>
+#include <glm/gtx/vector_angle.hpp>
+#include <limits>
+
+int test_angle()
+{
+	int Error = 0;
+	
+	float AngleA = glm::angle(glm::vec2(1, 0), glm::normalize(glm::vec2(1, 1)));
+	Error += glm::epsilonEqual(AngleA, glm::pi<float>() * 0.25f, 0.01f) ? 0 : 1;
+	float AngleB = glm::angle(glm::vec3(1, 0, 0), glm::normalize(glm::vec3(1, 1, 0)));
+	Error += glm::epsilonEqual(AngleB, glm::pi<float>() * 0.25f, 0.01f) ? 0 : 1;
+	float AngleC = glm::angle(glm::vec4(1, 0, 0, 0), glm::normalize(glm::vec4(1, 1, 0, 0)));
+	Error += glm::epsilonEqual(AngleC, glm::pi<float>() * 0.25f, 0.01f) ? 0 : 1;
+
+	return Error;
+}
+
+int test_orientedAngle_vec2()
+{
+	int Error = 0;
+	
+	float AngleA = glm::orientedAngle(glm::vec2(1, 0), glm::normalize(glm::vec2(1, 1)));
+	Error += glm::epsilonEqual(AngleA, glm::pi<float>() * 0.25f, 0.01f) ? 0 : 1;
+	float AngleB = glm::orientedAngle(glm::vec2(0, 1), glm::normalize(glm::vec2(1, 1)));
+	Error += glm::epsilonEqual(AngleB, -glm::pi<float>() * 0.25f, 0.01f) ? 0 : 1;
+	float AngleC = glm::orientedAngle(glm::normalize(glm::vec2(1, 1)), glm::vec2(0, 1));
+	Error += glm::epsilonEqual(AngleC, glm::pi<float>() * 0.25f, 0.01f) ? 0 : 1;
+
+	return Error;
+}
+
+int test_orientedAngle_vec3()
+{
+	int Error = 0;
+	
+	float AngleA = glm::orientedAngle(glm::vec3(1, 0, 0), glm::normalize(glm::vec3(1, 1, 0)), glm::vec3(0, 0, 1));
+	Error += glm::epsilonEqual(AngleA, glm::pi<float>() * 0.25f, 0.01f) ? 0 : 1;
+	float AngleB = glm::orientedAngle(glm::vec3(0, 1, 0), glm::normalize(glm::vec3(1, 1, 0)), glm::vec3(0, 0, 1));
+	Error += glm::epsilonEqual(AngleB, -glm::pi<float>() * 0.25f, 0.01f) ? 0 : 1;
+	float AngleC = glm::orientedAngle(glm::normalize(glm::vec3(1, 1, 0)), glm::vec3(0, 1, 0), glm::vec3(0, 0, 1));
+	Error += glm::epsilonEqual(AngleC, glm::pi<float>() * 0.25f, 0.01f) ? 0 : 1;
+
+	return Error;
+}
+
+int main()
+{
+	int Error(0);
+	
+	Error += test_angle();
+	Error += test_orientedAngle_vec2();
+	Error += test_orientedAngle_vec3();
+
+	return Error;
+}
+
+