Matrix: add isAllFinite() to check if every element is finite

src/lib/matrix/matrix/Matrix.hpp

@@ -594,6 +594,21 @@ public:
 
 		return result;
 	}
+
+	bool isAllFinite() const
+	{
+		const Matrix<float, M, N> &self = *this;
+
+		for (size_t i = 0; i < M; i++) {
+			for (size_t j = 0; j < N; j++) {
+				if (!std::isfinite(self(i, j))) {
+					return false;
+				}
+			}
+		}
+
+		return true;
+	}
 };
 
 template<typename Type, size_t M, size_t N>

src/lib/matrix/test/MatrixAssignmentTest.cpp

@@ -72,6 +72,7 @@ TEST(MatrixAssignmentTest, Assignment)
 	}
 
 	EXPECT_TRUE(m_nan.isAllNan());
+	EXPECT_FALSE(m_nan.isAllFinite());
 
 	float data2d[3][3] = {
 		{1, 2, 3},
@@ -87,6 +88,7 @@ TEST(MatrixAssignmentTest, Assignment)
 	}
 
 	EXPECT_FALSE(m2.isAllNan());
+	EXPECT_TRUE(m2.isAllFinite());
 
 	float data_times_2[9] = {2, 4, 6, 8, 10, 12, 14, 16, 18};
 	Matrix3f m3(data_times_2);