plotting - Force VectorPlot3D to show One arrow

I am plotting a curl, and I only want VectorPlot3D to show one arrow, I have tried adjusting VectorPoints-> 1, but the plot show's no arrows at all. Is 2 the minimum VectorPoints I can have?

If I cannot make use of VectorPlot3d in this way, how can I use the Arrow function to point in the direction of a vector field at a certain point?

Thank-you

Answer

I don't think it's possible. I assume the vector scaling routine needs at least two vectors. You can fake it though:

VectorPlot3D[{x, y, z}, {x, -1, 1}, {y, -1, 1}, {z, -1, 1}, 
 VectorPoints -> {0.9999999 {0.5, 0.5, 0.5}, {0.5, 0.5, 0.5}}]

Mathematica graphics

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