$MeshFormat 2.1 0 8 $EndMeshFormat $Nodes 3 1 0 0 0 2 1 0 0 3 0.7 0 0 $EndNodes $Elements 4 1 15 3 0 1 0 1 2 15 3 0 2 0 2 3 1 3 0 1 0 1 3 4 1 3 0 1 0 3 2 $EndElements