Non-rectangular environments

[TomGeorge1234]

An upgrade is planned to allow non-rectangular environments in RiaB.

Users would (optionally) pass, at initialisation, coordinates defining a simple polygon which would then make up the boundaries of the arena.

Whenever the Agents position, or the location of a Neuron etc. is selected it would be guaranteed to fall within this polygon. Plotting rate maps etc. would also be updated too so they still look elegant.

This may require adding in the shapely package as a requirement.

[TomGeorge1234]

RatInABox now supports any-polygon-shaped environments and adding holes into environments. These are handled when a class is initialised by passing them as lists of corners:

• Arbitrary polygon shaped environments

Env = Environment(params={'boundary':[[0,-0.2],[0,0.2],[1.5,0.5],[1.5,-0.5]]})

• Adding holes to the environment

Env = Environment(params={
    'aspect':1.8,
    'holes' : [[[0.2,0.2],[0.8,0.2],[0.8,0.8],[0.2,0.8]],
               [[1,0.2],[1.6,0.2],[1.6,0.8],[1,0.8]]]
})

Nb. polygons must be "simple" (not self intersecting, no holes) and holes must be non-intersecting.