Triple integrals in Cylindrical coordinates

This applet helps to visualize simple solids \(E\) in cylindrical coordinates of the following form:

So \( \theta \) is independent, \( r \) possibly depends on \( \theta \) and \( z \) possibly depends on both \(r,\theta \). Enter the corresponding bounds in the boxes, enter \(\theta \) as \( t \), and use the buttons to see the projection on the $x,y$-plane.