Struct GameContext 

pub struct GameContext { /* private fields */ }

Runtime context passed to the game update callback.

This struct provides access to frame timing, input state, and other runtime information needed during the game loop.

Example

game.run(|ctx| {
    let dt = ctx.delta_time();
    let fps = ctx.fps();

    // Move something based on time
    position.x += velocity * dt;
});

Implementations

impl GameContext

pub fn delta_time(&self) -> f32

Returns the time elapsed since the last frame in seconds.

Use this for frame-rate independent movement and animations.

Example

// Move at 100 pixels per second regardless of frame rate
position.x += 100.0 * ctx.delta_time();

pub fn total_time(&self) -> f32

Returns the total time elapsed since game start in seconds.

pub fn fps(&self) -> f32

Returns the current frames per second.

pub fn frame_count(&self) -> u64

Returns the current frame number (0-indexed).

pub fn window_size(&self) -> (u32, u32)

Returns the window dimensions as (width, height).

pub fn window_width(&self) -> u32

Returns the window width in pixels.

pub fn window_height(&self) -> u32

Returns the window height in pixels.

pub fn is_running(&self) -> bool

Returns true if the game is still running.

pub fn quit(&mut self)

Signals the game to exit after the current frame.

Trait Implementations

impl Debug for GameContext

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.