Agent trajectory

[wang-boyu]

What's the problem this feature will solve?

Store and draw the trajectories of agents in real time, for grid space and continuous space.

Describe the solution you'd like

Not entirely sure, but perhaps something like below when initializing space:

grid = mesa.visualization.CanvasGrid(agent_portrayal, 10, 10, 500, 500, agent_trajectory=True)

Additional context

See #​3 in https://github.com/projectmesa/mesa-geo/discussions/94#discussioncomment-3294737.