Show a base R plot of equilibrium payoff set

plot_eq_payoff_set(
g,
x = eq\$x[1],
t = 1,
eq = if (use.vr) get_eq(g, add.vr = TRUE) else g[["eq"]],
xlim = NULL,
ylim = NULL,
plot.r = TRUE,
alpha = 0.8,
black.border = TRUE,
)
g The game object for which an equilibrium has been solved A character vector of the state(s) for which the (continuation) equilibrium payoff set shall be shown. By default only the first stage. An equilibrium object. By default the last solved equilibrium. as in plot.default as in plot.default as in plot.default Setting add=FALSE can be useful to compare payoff sets of different games. Shall negotiation payoffs be shown as a point on the Pareto-frontier (default = TRUE) opacity of the fill color