Resolution function of a two-dimensional scattering detector

If a detector has a resolution function, then the simulated intensity map is blurred by convolution with that function.

Currently, only Gaussian resolution functions are supported.

Gaussian distribution

Create a Gaussian resolution function, and attach it to a detector, as follows:

resol = ba.ResolutionFunction2DGaussian(horizontal_width, vertical_width)

For an example, see resolution 2d example.