Fig 5. Global transparent streamline rendering (c = 3, α _decreasing), in which the opacity is the same along the whole streamline (yellow square shows that the whole Cg bundle is visible).

In (a) the mean direction of each streamline is based on the endpoints (n _endpoints, Eq (2)), whereas in (b) the mean direction is calculated from the scatter matrix (n _scatter, Eq (4)). The white squares indicate differences between both methods.