wolfram-mathematica - How to draw a 2d projection (circle) of a 3D object (sphere) in Mathematica?

Question

SphericalPlot3D[ Cos[[Theta]], {[Theta], 0, [Pi]}, {[Phi], 0, 2 [Pi]}] This gives me a sphere. But what should I do in order to get a projection of it along any of the plane, let say a-b plane? It should look like a circle. Any idea would be greatly acknowledged as I am quite new in Mathematica. Thanks!

N.B: for a-b plane, theta would be fixed ([Pi]/2)

Answer 1

我想，我明白了。我只需要使用“PolarPlot”来绘制一个固定的 theta。这给了我 ab 平面的投影。对于任何一般方向，可以相应地选择 theta 值。