rusty_engine 1.1.3

use rusty_engine::prelude::*;

fn main() {
    let mut game = Game::new();

    let mut race_car = game.add_actor("Race Car", ActorPreset::RacingCarGreen);
    race_car.translation = Vec2::new(0.0, 0.0);
    race_car.rotation = UP;
    race_car.scale = 1.0;

    let instructions = "Keyboard Example\n================\nChange translation (move): w a s d / arrows\nChange Rotation: z c\nChange Scale: + -";
    let text = game.add_text_actor("instructions", instructions);
    text.translation.y = 250.0;

    game.run(logic);
}

fn logic(game_state: &mut GameState) {
    // Get the race car actor
    let race_car = game_state.actors.get_mut("Race Car").unwrap();

    // Loop through any keyboard input that hasn't been processed this frame
    for keyboard_input in &game_state.keyboard_events {
        if let KeyboardInput {
            scan_code: _,
            key_code: Some(key_code),
            state: ElementState::Pressed,
        } = keyboard_input
        {
            // Handle various keypresses. The extra keys are for the Dvorak keyboard layout. ;-)
            match key_code {
                KeyCode::A | KeyCode::Left => race_car.translation.x -= 10.0,
                KeyCode::D | KeyCode::Right | KeyCode::E => race_car.translation.x += 10.0,
                KeyCode::O | KeyCode::Down | KeyCode::S => race_car.translation.y -= 10.0,
                KeyCode::W | KeyCode::Up | KeyCode::Comma => race_car.translation.y += 10.0,
                KeyCode::Z | KeyCode::Semicolon => race_car.rotation += std::f32::consts::FRAC_PI_4,
                KeyCode::C | KeyCode::J => race_car.rotation -= std::f32::consts::FRAC_PI_4,
                KeyCode::Plus | KeyCode::Equals => race_car.scale *= 1.1,
                KeyCode::Minus | KeyCode::Underline => race_car.scale *= 0.9,
                _ => {}
            }

            // Clamp the scale to a certain range so the scaling is reasonable
            race_car.scale = race_car.scale.clamp(0.1, 3.0);

            // Clamp the translation so that the car stays on the screen
            race_car.translation = race_car.translation.clamp(
                -game_state.screen_dimensions * 0.5,
                game_state.screen_dimensions * 0.5,
            );
        }
    }
}