A point on the 2d plane represents a preference (if we imagine that there are only 2 real-valued issues in the world). The regions shaded in a particular color

A point on the 2d plane represents a preference (if we imagine that there are only 2 real-valued issues in the world). The regions shaded in a particular color are the regions where a normal distribution of popular preferences centered there will elect the corresponding candidate. I assume that individual simulated voters just rank candidates from least to greatest by cartesian distance, or do that and then use a random cutoff for approval voting.