I'm particularly interested in magnetic and electric field lines such as showed in this picture (from http://www.grasshopper3d.com/forum/topics/creating-a-3d-field):
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pst-electrifielda lot since you suggested it. Thank you! As my question is about drawing 3D lines,pst-electricfielddoesn't fulfill my expectations despite being very useful. I've just found a dipolar magnetic field example (http://www.texample.net/tikz/examples/dipolar-magnetic-field/). If you are interested, I would accept an answer from you citing bothpst-electricfieldand that code example, as well as additional stuff if you have more to say. If you (or somebody else with more information) are not interested, I'm going to answer my own question. – Leonardo Castro Feb 08 '16 at 16:43