Apps

xecs programs are called apps. There are two kinds of apps:

• RealTimeApp: For programs, like games, which run in real time. Normally, these are used when interaction with humans is required.

• SimulationApp: For programs which run as quickly as possible. These do not interact with humans, we simply want to run our simulations and get our output without any delay.

RealTimeApp example:

import xecs as xx

def main() -> None:
    app = xx.RealTimeApp(num_entities=10)
    app.update()

if __name__ == "__main__":
    main()

SimulationApp example:

import xecs as xx

def main() -> None:
    app = xx.SimulationApp(num_entities=10)
    app.update(xx.Duration.from_millis(1000))

if __name__ == "__main__":
    main()

These examples do not do any useful work, but they are complete, working apps. They form the basic boilerplate on top of which we will build useful programs.