Angular dispersion of the sink particles distribution in each simulation. From top to bottom and from left to right: the simulations without feedback, with protostellar jets only, with HII regions only, and with both jets and HII regions. The different types of lines indicate the different thresholds of sink masses used to define the sets. For the two simulations with HII regions, on the second row, we indicate the moments of creation of the stellar objects with vertical lines, the colours of which denote their masses.