GfsOutputStreamline writes points along the streamline through a point in a given flow-field; i.e. the curve parallel to the instantaneous velocity field all along its length.
The syntax in parameter files is:
[ GfsOutputScalar ] X Y Z
where X, Y, and Z are the coordinates of the point defining the streamline.
The output format is:
GfsStreamline N X1 Y1 Z1 Q1 X2 Y2 Z2 Q2 ... Xn Yn Zn Qn
Here N is the number of points along the streamline as described in the following N lines in terms of four numbers, the first three of which are the Cartesian coordinates.