paraview using polar or cylindrical coordinates

my x,y,x mesh file is actually a polar mesh. How do I tell that the mesh is polar? I want to plot over lines using theta, radial lines. paraview expects a Cartesian mesh.

I’m afraid there is no polar dataset in VTK/ParaView.

You should transform your coordinates using the calculator with the “Coords Results” option.

How do I do this? Like
theta = acos(x/radius)
radial = y.sin theta)
z = z

At one time in the past there was a polar option or converter, but I may be wrong.

I made an error, should be radial = y/sin (theta)