BiotSavart 2.1 data file { Current Current ; ID current 0 1 } { Loop Loop current 100 wireDiameter 0.1 cm loop 1 0 cm winding -1 loop 0.707 0.707 cm loop 0.707 -0.707 cm } { Planar Planar grid 20 20 start 0 0 u 0 1 cm v 1 0 cm plotrange 0 120e-4 contour 10e-4 }