Just filling up the slots, actuall computation is done by specific algorithms (mcell_mc2d_force)
# S4 method for tgMC2D
initialize(.Object, mc_id, mc_x, mc_y, sc_x, sc_y, graph)x coordinates of metacells
y coordinates of metacells
x coordinates of cells
y coordinates of cells
data.frame with fields mc1, mc2 definining the graph
metacell object