Function logic

examples/collision.rs:47–90

(engine: &mut Engine, _: &mut GameState)

}

fn logic(engine: &mut Engine, _: &mut GameState) {
    // If a collision event happened last frame, print it out and play a sound
    for collision_event in engine.collision_events.drain(..) {
        let text = engine.texts.get_mut("collision text").unwrap();
        match collision_event.state {
            CollisionState::Begin => {
                text.value = format!("{:?}", collision_event.pair);
                engine.audio_manager.play_sfx(SfxPreset::Switch1, 1.0)
            }
            CollisionState::End => {
                text.value = "".into();
                engine.audio_manager.play_sfx(SfxPreset::Switch2, 1.0)
            }
        }
    }

    if let Some(sprite) = engine.sprites.get_mut("Player") {
        // Use the latest state of the mouse buttons to rotate the sprite
        let mut rotation_amount = 0.0;
        if engine.mouse_state.pressed(MouseButton::Left) {
            rotation_amount += ROTATION_SPEED * engine.delta_f32;
        }
        if engine.mouse_state.pressed(MouseButton::Right) {
            rotation_amount -= ROTATION_SPEED * engine.delta_f32;
        }
        sprite.rotation += rotation_amount;

        // Use the latest state of the mouse wheel to scale the sprite
        if let Some(location) = engine.mouse_state.location() {
            sprite.translation = location
        }

        // Mousewheel scales the car
        for mouse_wheel in &engine.mouse_wheel_events {
            sprite.scale *= 1.0 + (0.05 * mouse_wheel.y);
            sprite.scale = sprite.scale.clamp(0.1, 4.0);
        }
    }

    // Pressing C toggles sprite collider debug lines
    if engine.keyboard_state.just_pressed(KeyCode::KeyC) {
        engine.show_colliders = !engine.show_colliders;
    }
}