I have a question regarding how the function annotate_velocity is performed. From one
of the datasets I am analyzing ( I use FLASH4 data), at regions around simulation
coordinates r=0 with the default setting (no scaling, no normalization), yt seems to plot
velocity vectors pointing to random directions which is inconsistent with the field values
of "velocity_magnitude" in that region that my simulation set it to. I wonder if anyone
else has encountered this kind of problem before, and if there's a easy way to double
check on the data. Thanks!