Method update

examples/bunnymark.rs:77–126

(&mut self, app: &mut App)

impl EventHandler for GameState {
    fn update(&mut self, app: &mut App) {
        if self.spawn_timer > 0 {
            self.spawn_timer -= 1;
        }

        if app.input.is_key_pressed(Key::A) {
            self.auto_spawn = !self.auto_spawn;
        }

        let button_down = app.input.is_key_down(Key::Space)
            || app.input.is_mouse_button_down(MouseButton::Left)
            || app.input.is_gamepad_button_down(0, GamepadButton::A);

        let should_spawn = self.spawn_timer == 0 && (button_down || self.auto_spawn);

        if should_spawn {
            for _ in 0..INITIAL_BUNNIES {
                self.bunnies.push(Bunny::new(&mut self.rng));
            }
            self.spawn_timer = 10;
        }

        for bunny in &mut self.bunnies {
            bunny.position += bunny.velocity;
            bunny.velocity.y += GRAVITY;

            if bunny.position.x > MAX_X {
                bunny.velocity.x *= -1.0;
                bunny.position.x = MAX_X;
            } else if bunny.position.x < 0.0 {
                bunny.velocity.x *= -1.0;
                bunny.position.x = 0.0;
            }

            if bunny.position.y > MAX_Y {
                bunny.velocity.y *= -0.8;
                bunny.position.y = MAX_Y;

                if self.rng.gen::<bool>() {
                    bunny.velocity.y -= 3.0 + (self.rng.gen::<f32>() * 4.0);
                }
            } else if bunny.position.y < 0.0 {
                bunny.velocity.y = 0.0;
                bunny.position.y = 0.0;
            }
        }

        app.window
            .set_title(&format!("BunnyMark - {} bunnies", self.bunnies.len()));
    }

    fn draw(&mut self, app: &mut App) {
        app.gfx.clear(&app.window, Color::rgb(0.392, 0.584, 0.929));