Often the first points are enough to give an image what is going on. Later points add accuracy. Sometimed the solar screen is not updated regularly. To force the update, repress the solar neutrino button, or minimize and maximize the browser window, or do something similar, depenping on the platform. The finite size of the neutrino production region is accounted for by taking an average of 17 different initial points.
Angular distribution is still incomplete.
For the Sun and the solar neutrinos the models and data by John Bahcall is used. The predictions for the experiments are calculated by computing the expected neutrino fluxes within the sensitivity of the experiments. The code uses tabulated cross sections and solar fluxes, sums over the energy spectrum, and takes the neutral currents into account in water detectors. Nothing special, all straight forward. It probably works for less than minimal machines, but then I cannot guarantee that it is useful for anything.