Merge pull request #672 from amc522/master

Fixing checks for nan in fmin/fmax #672

glm/gtx/extended_min_max.inl

@@ -146,8 +146,8 @@ namespace glm
 		{
 			GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'fmin' only accept floating-point input");
 
-			if (isnan(y))
-				return x;
+			if (isnan(x))
+				return y;
 			if (isnan(y))
 				return x;
 
@@ -176,8 +176,8 @@ namespace glm
 		{
 			GLM_STATIC_ASSERT(std::numeric_limits<genType>::is_iec559, "'fmax' only accept floating-point input");
 
-			if (isnan(y))
-				return x;
+			if (isnan(x))
+				return y;
 			if (isnan(y))
 				return x;
 

test/gtx/gtx_extended_min_max.cpp

@@ -1,4 +1,5 @@
 #define GLM_ENABLE_EXPERIMENTAL
+
 #include <glm/gtx/extended_min_max.hpp>
 #include <glm/gtc/vec1.hpp>
 #include <glm/gtc/epsilon.hpp>
@@ -18,6 +19,9 @@ namespace fmin_
 		glm::vec1 A0 = glm::fmin(glm::vec1(1), glm::vec1(Zero_f / 0.0f));
 		Error += glm::epsilonEqual(A0.x, 1.0f, glm::epsilon<float>()) ? 0 : 1;
 
+		glm::vec1 A1 = glm::fmin(glm::vec1(Zero_f / 0.0f), glm::vec1(1));
+		Error += glm::epsilonEqual(A1.x, 1.0f, glm::epsilon<float>()) ? 0 : 1;
+
 		glm::vec2 B0 = glm::fmin(glm::vec2(1), glm::vec2(1));
 		glm::vec2 B1 = glm::fmin(glm::vec2(1), 1.0f);
 		bool B2 = glm::all(glm::equal(B0, B1));
@@ -47,6 +51,9 @@ namespace fmax_
 		glm::vec1 A0 = glm::fmax(glm::vec1(1), glm::vec1(Zero_f / 0.0f));
 		Error += glm::epsilonEqual(A0.x, 1.0f, glm::epsilon<float>()) ? 0 : 1;
 
+		glm::vec1 A1 = glm::fmax(glm::vec1(Zero_f / 0.0f), glm::vec1(1));
+		Error += glm::epsilonEqual(A0.x, 1.0f, glm::epsilon<float>()) ? 0 : 1;
+
 		glm::vec2 B0 = glm::fmax(glm::vec2(1), glm::vec2(1));
 		glm::vec2 B1 = glm::fmax(glm::vec2(1), 1.0f);
 		bool B2 = glm::all(glm::equal(B0, B1));