title: How to draw intersecting planes?
body: <p>I want to use matplotlib to draw more or less the figure I attached below, which includes the two intersecting planes with the right amount of transparency indicating their relative orientations, and the circles and vectors in the two planes projected in 2D. </p>
  
  <p>I'm not sure if there is an existing package for doing this, any hints?<img src="https://i.stack.imgur.com/tovNF.png" alt="image credit: M Strassler"></p>