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
New
johnp
Running the examples in chapter 5 c under pytest 5.4.1 causes an AttributeError: ‘module’ object has no attribute ‘config’. In particula...
New
GilWright
Working through the steps (checking that the Info,plist matches exactly), run the demo game and what appears is grey but does not fill th...
New
Mmm
Hi, build fails on: bracket-lib = “~0.8.1” when running on Mac Mini M1 Rust version 1.5.0: Compiling winit v0.22.2 error[E0308]: mi...
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
curtosis
Running mix deps.get in the sensor_hub directory fails with the following error: ** (Mix) No SSH public keys found in ~/.ssh. An ssh aut...
New
brunogirin
When installing Cards as an editable package, I get the following error: ERROR: File “setup.py” not found. Directory cannot be installe...
New
brunogirin
When running tox for the first time, I got the following error: ERROR: InterpreterNotFound: python3.10 I realised that I was running ...
New

Other popular topics Top

AstonJ
A thread that every forum needs! Simply post a link to a track on YouTube (or SoundCloud or Vimeo amongst others!) on a separate line an...
New
siddhant3030
I’m thinking of buying a monitor that I can rotate to use as a vertical monitor? Also, I want to know if someone is using it for program...
New
brentjanderson
Bought the Moonlander mechanical keyboard. Cherry Brown MX switches. Arms and wrists have been hurting enough that it’s time I did someth...
New
Margaret
Hello everyone! This thread is to tell you about what authors from The Pragmatic Bookshelf are writing on Medium.
1147 29994 760
New
AstonJ
Biggest jackpot ever apparently! :upside_down_face: I don’t (usually) gamble/play the lottery, but working on a program to predict the...
New
DevotionGeo
I have always used antique keyboards like Cherry MX 1800 or Cherry MX 8100 and almost always have modified the switches in some way, like...
New
AstonJ
This is cool! DEEPSEEK-V3 ON M4 MAC: BLAZING FAST INFERENCE ON APPLE SILICON We just witnessed something incredible: the largest open-s...
New
PragmaticBookshelf
A concise guide to MySQL 9 database administration, covering fundamental concepts, techniques, and best practices. Neil Smyth MySQL...
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
mindriot
Ok, well here are some thoughts and opinions on some of the ergonomic keyboards I have, I guess like mini review of each that I use enoug...
New

Sub Categories: