bevy::app

Module prelude

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Expand description

The app prelude.

This includes the most common types in this crate, re-exported for your convenience.

Structs§

  • App
    App is the primary API for writing user applications. It automates the setup of a standard lifecycle and provides interface glue for plugins.
  • First
    Runs first in the schedule.
  • FixedFirst
    Runs first in the FixedMain schedule.
  • FixedLast
    The schedule that runs last in FixedMain
  • FixedPostUpdate
    The schedule that runs after the FixedUpdate schedule, for reacting to changes made in the main update logic.
  • FixedPreUpdate
    The schedule that contains logic that must run before FixedUpdate.
  • FixedUpdate
    The schedule that contains most gameplay logic, which runs at a fixed rate rather than every render frame. For logic that should run once per render frame, use the Update schedule instead.
  • Last
    Runs last in the schedule.
  • Main
    The schedule that contains the app logic that is evaluated each tick of App::update().
  • PostStartup
    The schedule that runs once after Startup.
  • PostUpdate
    The schedule that contains logic that must run after Update. For example, synchronizing “local transforms” in a hierarchy to “global” absolute transforms. This enables the PostUpdate transform-sync system to react to “local transform” changes in Update without the Update systems needing to know about (or add scheduler dependencies for) the “global transform sync system”.
  • PreStartup
    The schedule that runs before Startup.
  • PreUpdate
    The schedule that contains logic that must run before Update. For example, a system that reads raw keyboard input OS events into an Events resource. This enables systems in Update to consume the events from the Events resource without actually knowing about (or taking a direct scheduler dependency on) the “os-level keyboard event system”.
  • RunFixedMainLoop
    Runs the FixedMain schedule in a loop according until all relevant elapsed time has been “consumed”.
  • SpawnScene
    The schedule that contains scene spawning.
  • Startup
    The schedule that runs once when the app starts.
  • SubApp
    A secondary application with its own World. These can run independently of each other.
  • Update
    The schedule that contains any app logic that must run once per render frame. For most gameplay logic, consider using FixedUpdate instead.

Enums§

  • AppExit
    An event that indicates the App should exit. If one or more of these are present at the end of an update, the runner will end and (maybe) return control to the caller.
  • RunFixedMainLoopSystem
    Set enum for the systems that want to run inside RunFixedMainLoop, but before or after the fixed update logic. Systems in this set will run exactly once per frame, regardless of the number of fixed updates. They will also run under a variable timestep.

Traits§