ds2k5

ds2k5

Advanced Hands-on Rust: moving_dragon - little mod - diagonal movment

Hi,
I did a little mod of the Code: moving_dragon
so that the “dragon” can move UP/DOWN + RIGHT/LEFT (diagonal) at the same time

use bevy::prelude::*;

fn main() {
  App::new()
    .add_plugins(DefaultPlugins)
    .add_systems(Startup, setup)
    .add_systems(Update, movement)
    .run();
}
#[derive(Component)]
struct Dragon;

fn setup(//(1)
  mut commands: Commands, //(2)
  asset_server: Res<AssetServer>//(3)
) {
  commands.spawn(Camera2d::default());//(4)
  let dragon_image = asset_server.load("dragon_left.png");//(5)
  commands
    .spawn(Sprite::from_image(dragon_image))//(6)
    .insert(Dragon);//(7)
}

fn movement(
  keyboard: Res<ButtonInput<KeyCode>>,//(8)
  mut dragon_query: Query<&mut Transform, With<Dragon>>,//(9)
) {
  let delta = if keyboard.all_pressed([KeyCode::ArrowLeft, KeyCode::ArrowUp]) {//(10)
    Vec2::new(-1.0, 1.0)
  } else if keyboard.all_pressed([KeyCode::ArrowLeft, KeyCode::ArrowDown]) {
    Vec2::new(-1.0, -1.0)
  } else if keyboard.all_pressed([KeyCode::ArrowRight, KeyCode::ArrowUp]) {
    Vec2::new(1.0, 1.0)
  } else if keyboard.all_pressed([KeyCode::ArrowRight, KeyCode::ArrowDown]) {
    Vec2::new(1.0, -1.0)
  } else if keyboard.pressed(KeyCode::ArrowLeft) {
    Vec2::new(-1.0, 0.0)
  } else if keyboard.pressed(KeyCode::ArrowRight) {
    Vec2::new(1.0, 0.0)
  } else if keyboard.pressed(KeyCode::ArrowDown) {
    Vec2::new(0.0, -1.0)
  } else if keyboard.pressed(KeyCode::ArrowUp) {
    Vec2::new(0.0, 1.0)
  } else if keyboard.all_pressed([KeyCode::ArrowUp, KeyCode::ArrowLeft]) {
    Vec2::new(1.0, 1.0)    
  } else {
    Vec2::ZERO
  };

  dragon_query.iter_mut().for_each(|mut transform| {//(11)
    transform.translation += delta.extend(0.0);//(12)
  });
}

But how to change the Code, that the Image is changed when pressing ArrowRight key ?
That the dragon looks to the right when moving right.

Where Next?

Popular Pragmatic Bookshelf topics Top

abtin
page 20: … protoc command… I had to additionally run the following go get commands in order to be able to compile protobuf code using go...
New
belgoros
Following the steps described in Chapter 6 of the book, I’m stuck with running the migration as described on page 84: bundle exec sequel...
New
edruder
I thought that there might be interest in using the book with Rails 6.1 and Ruby 2.7.2. I’ll note what I needed to do differently here. ...
New
Chrichton
Dear Sophie. I tried to do the “Authorization” exercise and have two questions: When trying to plug in an email-service, I found the ...
New
swlaschin
The book has the same “Problem space/Solution space” diagram on page 18 as is on page 17. The correct Problem/Solution space diagrams ar...
New
brian-m-ops
#book-python-testing-with-pytest-second-edition Hi. Thanks for writing the book. I am just learning so this might just of been an issue ...
New
jskubick
I’m under the impression that when the reader gets to page 136 (“View Data with the Database Inspector”), the code SHOULD be able to buil...
New
taguniversalmachine
Hi, I am getting an error I cannot figure out on my test. I have what I think is the exact code from the book, other than I changed “us...
New
bjnord
Hello @herbert ! Trying to get the very first “Hello, Bracket Terminal!" example to run (p. 53). I develop on an Amazon EC2 instance runn...
New
mcpierce
@mfazio23 I’ve applied the changes from Chapter 5 of the book and everything builds correctly and runs. But, when I try to start a game,...
New

Other popular topics Top

AstonJ
If it’s a mechanical keyboard, which switches do you have? Would you recommend it? Why? What will your next keyboard be? Pics always w...
New
New
New
AstonJ
You might be thinking we should just ask who’s not using VSCode :joy: however there are some new additions in the space that might give V...
New
AstonJ
This looks like a stunning keycap set :orange_heart: A LEGENDARY KEYBOARD LIVES ON When you bought an Apple Macintosh computer in the e...
New
PragmaticBookshelf
Tailwind CSS is an exciting new CSS framework that allows you to design your site by composing simple utility classes to create complex e...
New
AstonJ
Was just curious to see if any were around, found this one: I got 51/100: Not sure if it was meant to buy I am sure at times the b...
New
New
AnfaengerAlex
Hello, I’m a beginner in Android development and I’m facing an issue with my project setup. In my build.gradle.kts file, I have the foll...
New
Fl4m3Ph03n1x
Background Lately I am in a quest to find a good quality TTS ai generation tool to run locally in order to create audio for some videos I...
New

Sub Categories: