用空间中的面上的向量可视化一个场.
SliceVectorPlot3D[ Grad[Sin[x] Cos[ y] + Cos[ z], {x, y, z}], {x, -2, 2}, {y, -2, 2}, {z, -2, 2}, PlotTheme -> "Detailed", ImageSize -> 500, VectorStyle -> "Arrow3D", VectorColorFunction -> Hue]