I am trying to visualize field lines using the streamline flow renderer but the results are not what I expect. I created this example to have field lines which spiral around a specific center (see image below of a field line computed in IDL). However, the VAPOR flow renderer tends to produce nonsensical lines (see image below from VAPOR, using 100 random seeds with the rake around a typical area I want to start the integration from). It appears that the integration is taking very large initial steps. I am wondering if there is a way to adjust this? Or is it possible that something is going wrong when I’m converting my data to vdc? The volume renderer produces expected output with expected values so I’m a bit confused. Below is the code I use to convert my data to vdc from the files ‘Bx’, ‘By’, ‘Bz’. Any input is appreciated.
vdccreate -dimension 512x512x600 -extents 0:0:0:6:6:2.5 -vars3d Bx:By:Bz mag_vars.vdc
raw2vdc -varname Bx mag_vars.vdc Bx
raw2vdc -varname By mag_vars.vdc By
raw2vdc -varname Bz mag_vars.vdc Bz