Fixed GLM_GTX_vector_angle implementation

glm/gtx/vector_angle.hpp

@@ -25,50 +25,45 @@
 #	pragma message("GLM: GLM_GTX_vector_angle extension included")
 #endif
 
-namespace glm
+namespace glm{
+namespace gtx{
+//! GLM_GTX_vector_angle extension: Compute angle between vectors
+namespace vector_angle
 {
-	namespace test{
-		void main_gtx_vector_angle();
-	}//namespace test
+	using namespace quaternion;
+	using namespace epsilon;
 
-    namespace gtx{
-	//! GLM_GTX_vector_angle extension: Compute angle between vectors
-    namespace vector_angle
-    {
-		using namespace quaternion;
-		using namespace epsilon;
+	/// \addtogroup gtx_vector_angle
+	///@{
 
-		/// \addtogroup gtx_vector_angle
-		///@{
+	//! Returns the absolute angle between two vectors
+	//! Parameters need to be normalized.
+	//! From GLM_GTX_vector_angle extension
+	template <typename vecType> 
+	typename vecType::value_type angle(
+		vecType const & x, 
+		vecType const & y);
 
-		//! Returns the absolute angle between x and y.
-		//! Parameters need to be normalized.
-		//! From GLM_GTX_vector_angle extension
-		template <typename vecType> 
-		typename vecType::value_type angle(
-			vecType const & x, 
-			vecType const & y);
+	//! Returns the oriented angle between two 2d vectors 
+	//! Parameters need to be normalized.
+	//! From GLM_GTX_vector_angle extension.
+	template <typename T> 
+	typename T orientedAngle(
+		detail::tvec2<T> const & x, 
+		detail::tvec2<T> const & y);
 
-		//! Returns the oriented angle between x and y 
-		//! Parameters need to be normalized.
-		//! From GLM_GTX_vector_angle extension.
-		template <typename vecType> 
-		typename vecType::value_type orientedAngle(
-			vecType const & x, 
-			vecType const & y);
+	//! Returns the oriented angle between two 3d vectors based from a reference axis.
+	//! Parameters need to be normalized.
+	//! From GLM_GTX_vector_angle extension.
+	template <typename T>
+	typename vecType<T> orientedAngle(
+		detail::tvec3<T> const & x,
+		detail::tvec3<T> const & y,
+		detail::tvec3<T> const & ref);
 
-		//! Returns the orientation of a two vector base from a normal.
-		//! Parameters need to be normalized.
-		//! From GLM_GTX_vector_angle extension.
-		template <template<typename> class vecType, typename T>
-		typename vecType<T> orientedAngleFromRef(
-			vecType<T> const & x,
-			vecType<T> const & y,
-			detail::tvec3<T> const & ref);
-
-		///@}
-    }//namespace vector_angle
-    }//namespace gtx
+	///@}
+}//namespace vector_angle
+}//namespace gtx
 }//namespace glm
 
 #include "vector_angle.inl"

glm/gtx/vector_angle.inl

@@ -29,62 +29,28 @@ GLM_FUNC_QUALIFIER valType orientedAngle
 	detail::tvec2<valType> const & y
 )
 {
-    valType Angle = acos(dot(x, y));
-    valType c = cos(Angle);
-    valType s = sin(Angle);
-    detail::tvec2<valType> TransformedVector = detail::tvec2<valType>(c * y.x - s * y.y, s * y.x + c * y.y);
-    if(all(equalEpsilon(x, TransformedVector, valType(0.01))))
-		return -glm::degrees(Angle);
+    valType Angle = glm::degrees(acos(dot(x, y)));
+	detail::tvec2<valType> TransformedVector = glm::gtx::rotate_vector::rotate(x, Angle);
+    if(all(equalEpsilon(y, TransformedVector, valType(0.01))))
+		return Angle;
     else
-        return glm::degrees(Angle);
-}
-
-//! \todo epsilon is hard coded to 0.01
-template <typename valType> 
-GLM_FUNC_QUALIFIER valType orientedAngle
-(
-	detail::tvec3<valType> const & x, 
-	detail::tvec3<valType> const & y
-)
-{
-    valType Angle = degrees(acos(dot(x, y)));
-	detail::tvec3<valType> TransformedVector = glm::gtx::rotate_vector::rotate(y, Angle, glm::core::function::geometric::cross(x, y));
-    if(all(equalEpsilon(x, TransformedVector, valType(0.01))))
-		return -Angle;
-    else
-	   return Angle;
+        return -Angle;
 }
 
 template <typename valType>
-GLM_FUNC_QUALIFIER valType orientedAngleFromRef
-(
-    detail::tvec2<valType> const & x,
-    detail::tvec2<valType> const & y,
-	detail::tvec3<valType> const & ref
-)
-{
-	valType Angle = glm::acos(glm::dot(x, y));
-
-	if(glm::dot(ref, detail::tvec3<valType>(glm::cross(x, y), valType(0))) < valType(0))
-		return -glm::degrees(Angle);
-	else
-		return glm::degrees(Angle);
-}
-
-template <typename valType>
-GLM_FUNC_QUALIFIER valType orientedAngleFromRef
+GLM_FUNC_QUALIFIER valType orientedAngle
 (
 	detail::tvec3<valType> const & x,
 	detail::tvec3<valType> const & y,
 	detail::tvec3<valType> const & ref
 )
 {
-	valType Angle = glm::acos(glm::dot(x, y));
+	valType Angle = glm::degrees(glm::acos(glm::dot(x, y)));
 
 	if(glm::dot(ref, glm::cross(x, y)) < valType(0))
-		return -glm::degrees(Angle);
+		return -Angle;
 	else
-		return glm::degrees(Angle);
+		return Angle;
 }
 
 }//namespace vector_angle

test/gtx/gtx_vector_angle.cpp

@@ -19,12 +19,12 @@ int test_vector_angle_calls()
 	float AngleA = glm::angle(glm::vec3(1, 0, 0), glm::vec3(0, 1, 0));
 	float AngleB = glm::orientedAngle(glm::vec2(1, 0), glm::normalize(glm::vec2(1, 1)));
 	float AngleC = glm::orientedAngle(glm::vec2(0, 1), glm::normalize(glm::vec2(1, 1)));
-	float AngleD = glm::orientedAngleFromRef(glm::vec3(1, 0, 0), glm::vec3(0, 1, 0), glm::vec3(0, 0, 1));
+	float AngleD = glm::orientedAngle(glm::vec3(1, 0, 0), glm::vec3(0, 1, 0), glm::vec3(0, 0, 1));
 
 	return Error;
 }
 
-int test_vector_angle_orientedAngle()
+int test_orientedAngle_vec2()
 {
     int Error = 0;
     
@@ -32,11 +32,22 @@ int test_vector_angle_orientedAngle()
     Error += AngleA == 45.f ? 0 : 1;
 	float AngleB = glm::orientedAngle(glm::vec2(0, 1), glm::normalize(glm::vec2(1, 1)));    
     Error += AngleB == -45.f ? 0 : 1;
+	float AngleC = glm::orientedAngle(glm::normalize(glm::vec2(1, 1)), glm::vec2(0, 1));
+    Error += AngleC == 45.f ? 0 : 1;
  
-	float AngleC = glm::orientedAngle(glm::vec3(1, 0, 0), glm::normalize(glm::vec3(1, 1, 0)));
+    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 += AngleA == 45.f ? 0 : 1;
+	float AngleB = glm::orientedAngle(glm::vec3(0, 1, 0), glm::normalize(glm::vec3(1, 1, 0)), glm::vec3(0, 0, 1));    
+    Error += AngleB == -45.f ? 0 : 1;
+	float AngleC = glm::orientedAngle(glm::normalize(glm::vec3(1, 1, 0)), glm::vec3(0, 1, 0), glm::vec3(0, 0, 1));    
     Error += AngleC == 45.f ? 0 : 1;
-	float AngleD = glm::orientedAngle(glm::vec3(0, 1, 0), glm::normalize(glm::vec3(1, 1, 0)));    
-    Error += AngleD == -45.f ? 0 : 1;
     
     return Error;
 }
@@ -44,7 +55,8 @@ int test_vector_angle_orientedAngle()
 int main()
 {
 	int Error = 0;
-    Error += test_vector_angle_orientedAngle();
+    Error += test_orientedAngle_vec2();
+	Error += test_orientedAngle_vec3();
 	Error += test_vector_angle_calls();
 
 	return Error;