Struct Env 

pub struct Env<'a, 't> {

    pub wildlife: &'a mut Wildlife,
    pub cells: &'a mut Cells,
    pub placed: &'a mut Vec<Placed>,
    pub templates: &'a [Template],
    pub terrain: &'a HeightGrid<'t>,
    pub materials: &'a [RawMaterial],
    pub storages: &'a mut [Storage],
    pub sites: &'a [StorageSite],
    pub rng: &'a mut Random,
    pub construction: &'a mut Construction,
    pub stock: [(i32, i32); 21],
    pub temperature: f32,
    pub visits: &'a [(usize, i64)],
}

The world the citizens’ update borrows (everything but the citizens themselves).

Fields

wildlife: &'a mut Wildlife

Wild animals (hunting).

cells: &'a mut Cells

The gameplay map.

placed: &'a mut Vec<Placed>

The placed objects.

templates: &'a [Template]

The object templates.

terrain: &'a HeightGrid<'t>

The ground’s heights.

materials: &'a [RawMaterial]

The raw materials.

storages: &'a mut [Storage]

The town’s storages.

sites: &'a [StorageSite]

The storage sites.

rng: &'a mut Random

The game’s random numbers.

construction: &'a mut Construction

The construction manager.

stock: [(i32, i32); 21]

The stock manager’s (count, limit) per slot from the last recount.

temperature: f32

The environment’s temperature.

visits: &'a [(usize, i64)]

This iteration’s bucket visits (EntityScheduler::take_visits): placed entities by index, citizens from scheduler::EXTRA, each with the time since its last visit.