Fixed GCC 7 issues in mesh module

src/mesh/DistanceComputations.h

@@ -42,6 +42,14 @@ struct DistanceProperties
    typedef typename MeshType::Scalar Scalar;
    typedef math::Matrix3<Scalar> Matrix;
 
+   // Dummy constructor to suppress GCC 7 warnings
+   DistanceProperties() : e0(real_t(0)), e1(real_t(0)), e2(real_t(0)),
+                          e1_normal(real_t(0)), e2_normal(real_t(0)),
+                          e1_normalized(real_t(0)), e2_normalized(real_t(0)), e0_normalized(real_t(0)),
+                          e0l(real_t(0)), e1l(real_t(0)), e2l(real_t(0)),
+                          translation(real_t(0))
+   {}
+
    Vec2 e0, e1, e2;
    Vec2 e1_normal, e2_normal;
    Vec2 e1_normalized, e2_normalized, e0_normalized;
@@ -978,4 +986,4 @@ void TriangleDistance<MeshType>::filterTrianglesForAABB( const BoundingBox & aab
 }
 
 } // namespace mesh
-} // namespace walberla
+} // namespace walberla
\ No newline at end of file

tests/mesh/NumericIntegrationTest.cpp

@@ -93,9 +93,10 @@ Matrix3<real_t> inertiaTensorNumeric( const ContainmentT & body, const AABB & aa
    {
       if(body.contains( ContainmentT::toPoint( *it ) ))
       {
-         const real_t & x = (*it)[0];
-         const real_t & y = (*it)[1];
-         const real_t & z = (*it)[2];
+         const Vector3<real_t> p = *it;
+         const real_t & x = p[0];
+         const real_t & y = p[1];
+         const real_t & z = p[2];
 
          intertiaTensor[0] += y*y + z*z;
          intertiaTensor[1] += -x*y;
@@ -193,4 +194,4 @@ int main( int argc, char * argv[] )
 int main( int argc, char * argv[] )
 {
    return walberla::mesh::main( argc, argv );
-}
+}
\ No newline at end of file