Merge pull request #928 from l90lpa/lMaxNorm-proposal

L max norm proposal #928

glm/gtx/norm.hpp

@@ -3,6 +3,7 @@
 ///
 /// @see core (dependence)
 /// @see gtx_quaternion (dependence)
+/// @see gtx_component_wise (dependence)
 ///
 /// @defgroup gtx_norm GLM_GTX_norm
 /// @ingroup gtx
@@ -16,6 +17,7 @@
 // Dependency:
 #include "../geometric.hpp"
 #include "../gtx/quaternion.hpp"
+#include "../gtx/component_wise.hpp"
 
 #if GLM_MESSAGES == GLM_ENABLE && !defined(GLM_EXT_INCLUDED)
 #	ifndef GLM_ENABLE_EXPERIMENTAL
@@ -70,6 +72,16 @@ namespace glm
 	template<typename T, qualifier Q>
 	GLM_FUNC_DECL T lxNorm(vec<3, T, Q> const& x, unsigned int Depth);
 
+	//! Returns the LMax norm between x and y.
+	//! From GLM_GTX_norm extension.
+	template<typename T, qualifier Q>
+	GLM_FUNC_DECL T lMaxNorm(vec<3, T, Q> const& x, vec<3, T, Q> const& y);
+
+	//! Returns the LMax norm of v.
+	//! From GLM_GTX_norm extension.
+	template<typename T, qualifier Q>
+	GLM_FUNC_DECL T lMaxNorm(vec<3, T, Q> const& x);
+
 	/// @}
 }//namespace glm
 

glm/gtx/norm.inl

@@ -80,4 +80,16 @@ namespace detail
 		return pow(pow(abs(v.x), T(Depth)) + pow(abs(v.y), T(Depth)) + pow(abs(v.z), T(Depth)), T(1) / T(Depth));
 	}
 
+	template<typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER T lMaxNorm(vec<3, T, Q> const& a, vec<3, T, Q> const& b)
+	{
+		return compMax(abs(b - a));
+	}
+
+	template<typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER T lMaxNorm(vec<3, T, Q> const& v)
+	{
+		return compMax(abs(v));
+	}
+
 }//namespace glm

test/gtx/gtx_norm.cpp

@@ -1,6 +1,24 @@
 #define GLM_ENABLE_EXPERIMENTAL
 #include <glm/gtx/norm.hpp>
 
+
+int test_lMaxNorm()
+{
+	int Error(0);
+	
+	{
+		float norm = glm::lMaxNorm(glm::vec3(-1, -2, -3));
+		Error += glm::epsilonEqual(norm, 3.f, 0.00001f) ? 0 : 1;
+	}
+
+	{
+		float norm = glm::lMaxNorm(glm::vec3(2, 3, 1));
+		Error += glm::epsilonEqual(norm, 3.f, 0.00001f) ? 0 : 1;
+	}
+  
+	return Error;
+}
+
 int test_lxNorm()
 {
 	int Error(0);
@@ -49,7 +67,6 @@ int test_lxNorm()
 		Error += glm::epsilonEqual(norm, 3.301927249f, 0.00001f) ? 0 : 1;
 	}
 
-
 	return Error;
 }
 
@@ -57,6 +74,7 @@ int main()
 {
 	int Error(0);
 
+	Error += test_lMaxNorm();
 	Error += test_lxNorm();
 
 	return Error;