I am trying to draw a wheel-like figure like this. I had used xfig.
I wonder whether I can also use LaTex tikz or other ways to get similar figure with the additional criterion
- the area enclosed by the four red rectangulars/squares --- should have been filled in with a gray shaded but still transparent color (like tunable transparency 10%, 30%, 50%, 70% for each wing of the 4 wings of the wheel) or so.
Do any experts know how to do this?
Thank you! (I will accept the answer very soon)