[vtkusers] ploting an array of points to represent magnetic field intensity with VTK

[yadin Bocuma Rivas]

hi!
i am planning to plot electromagnetic fiels using vtk
at the mooment i got the x,y,z coordinates into arrays and i have the magnitude
or intensity of the fields ; that is at every point(x,y,z) i have the value of the corresponding  component of the magnetic field in the x,y,z direction ; 
how can i visualise this magnetidc field with vtk ;  which commands can i use?
i matlab I used quiver3(x,y,z,Ex,Ey,Ez) how can i do this with VTK 

is an array of points(x,y,z) and the field is (Ex,Ey,Ez) please how can i start doing these

thanks 

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