Trait tetra::State [−][src]
Implemented by types that contain game state and provide logic for updating it and drawing it to the screen.
Error Handling
The methods on State
allow you to return a Result
, either explicitly or via the ?
operator. If an error is returned, the game will close and the error will be returned from
the Context::run
call that was used to start it. This allows you to propagate errors
back to main
for reporting/logging.
The error type defaults to TetraError
, but this can be overridden by adding a type parameter
to your State
implementation (e.g. State<MyError>
).
Examples
The hello_world
example
demonstrates a minimal implementation of the State
trait.
The error_handling
example demonstrates how custom error types can be used to implement more robust error handling.
Provided methods
fn update(&mut self, ctx: &mut Context) -> Result<(), E>
[src]
Called when it is time for the game to update.
fn draw(&mut self, ctx: &mut Context) -> Result<(), E>
[src]
Called when it is time for the game to be drawn.
fn event(&mut self, ctx: &mut Context, event: Event) -> Result<(), E>
[src]
Called when a window or input event occurs.