Parameter Documentation

Speed

By default, agents' speeds are normally distributed with mean 1.2 m/s and standard deviation 0.6 m/s. The speeds can be fixed for all agents by clicking on the 'Fixed Speed' checkbox, this then enables the user to select a speed.

Radius

Agents' radii are also normally distributed, this time with mean 0.25 m and standard deviation 0.1 m. The radii can be fixed for all agents by clicking on the 'Fixed Radius' checkbox, this again enables the user to select a radius.

Randomness

In order to avoid situations of perfect symmetry, where two agents might meet head on and get stuck repelling each other along their line of movement forever, a random force is added perpendicular to their direction of movement. The random force can vary between 1 N and the value selected by the user. By default, a random force between 1 - 500 N is applied to all agents.

Interaction Strength

This is the strength of the 'social force' being applied to the agent as a result of other agents being within their personal space zone. The 'social force' takes the form:
F = A x e^{(r_αβ - d_αβ)}, where A is the interaction strength, r_αβ is the sum of the radii of agents α and β and d_αβ is the distance between agents α and β. The default setting for this parameter is 1500 N.

Repulsion Type

By default, all agents repel all other agents in the simulation, however they can be made to only reject agents of the opposite colour, or none at all.

Gap Width

This parameter controls the width of the opening in the wall separating the two groups of agents and is set to 1.5 m by default.

Personal Space

The personal space of an agent is the distance they want to maintain from other agents. Practically speaking, this is the threshold distance at which the 'social force' is applied. By default, this is set to 30 cm.

Agent Count

This controls the number of agents present on either side of the separating wall. By default there are 30 agents on both sides.