= {
{ ( Eigen::Vector2d () << 0, 0. ).finished(), 64./81},
{ ( Eigen::Vector2d () << -
gp3, -
gp3 ).finished(), 25./81},
{ ( Eigen::Vector2d () << +
gp3, -
gp3 ).finished(), 25./81},
{ ( Eigen::Vector2d () << +
gp3, +
gp3 ).finished(), 25./81},
{ ( Eigen::Vector2d () << -
gp3, +
gp3 ).finished(), 25./81},
{ ( Eigen::Vector2d () << 0, -
gp3 ).finished(), 40./81},
{ ( Eigen::Vector2d () <<
gp3, 0. ).finished(), 40./81},
{ ( Eigen::Vector2d () << 0, +
gp3 ).finished(), 40./81},
{ ( Eigen::Vector2d () << -
gp3, 0. ).finished(), 40./81},
}