Crate civ_engine 

CivLab Deterministic Simulation Engine

Uses fixed-point arithmetic for deterministic simulation results. Uses i64 with scaling for deterministic calculations.

Modules

• engine - Full ECS-based simulation with tick loop
• step - Simple step function for basic simulation
• policy - Policy/consumption calculations
• metrics - Tyranny/legitimacy metrics
• io - File I/O utilities

Re-exports

pub use engine::Simulation;

pub use engine::SimulationSnapshot;

pub use engine::WorldState;

pub use engine::Position;

pub use engine::Citizen;

pub use engine::JobType;

pub use engine::Building;

pub use engine::BuildingType;

pub use engine::Resources;

pub use engine::Production;

pub use engine::ResourceType;

pub use engine::MilitaryUnit;

pub use engine::UnitType;

pub use policy::effective_consumption;

pub use policy::PolicyInput;

pub use metrics::compute;

pub use metrics::Metrics;

Modules

engine

CivLab Simulation Engine - Core Tick Loop with ECS

io

I/O utilities for simulation state persistence

metrics

Metrics module - simulation metrics calculation

policy

Policy module - consumption calculations based on policy settings

Structs

Fixed

Fixed-point type: i64 with 18 decimal places of precision Stored as raw i64, divided by 10^18 for actual value This ensures deterministic simulation across platforms

Constants

SCALE

Functions

create_rng

Create a seeded RNG from world state

step

Advance simulation by one tick (simple API)

Type Aliases

SimRng

Seeded RNG for deterministic simulation