The syntax in parameter files is:
[ GfsOutputScalar ]
By default the grid "pixels" are the square cells at the highest level of refinement. The level of the cells taken into account can be controlled using the
maxlevel option of GfsOutputScalar. Setting
maxlevel can also be useful to control the size (in grid points) of the file produced: when
maxlevel is set the size of the grid will always be a multiple (depending on the number of boxes in the computation domain) of 2^maxlevel. This holds even when the number of levels in the simulation changes due to adaptive refinement.
Note that this object is only available for 2D simulations.
Note also that this object has not been "parallelised" yet.