I have the following code working but the Release event doesn't seem to be getting triggered. The logic looks sound but the square will move with first arrow click but not stop moving on release. The opposite arrow does nothing after this.
It is based on this tutorial Part 2: Moving Square « A rust/piston game developing tutorial with changes to fix the compile errors when using the latest crate for piston_window.
Any help or suggestions would be great, thanks.
EDIT: I think I found the problem, I need to handle the Release event in the main loop, doh!
using the piston_window = "0.67.0" crate in Cargo.toml
extern crate piston_window;
use piston_window::*;
struct Game {
rotation: f64,
x: f64,
y: f64,
up_d: bool, down_d: bool, left_d: bool, right_d: bool
}
impl Game {
fn new() -> Game {
Game { rotation : 0.0, x : 0.0, y : 0.0, up_d: false, down_d: false, left_d: false, right_d: false }
}
fn on_update(&mut self, upd: UpdateArgs) {
//self.rotation += 3.0 * upd.dt;
if self.up_d {
self.y += (-50.0) * upd.dt;
}
if self.down_d {
self.y += (50.0) * upd.dt;
}
if self.left_d {
self.x += (-50.0) * upd.dt;
}
if self.right_d {
self.x += (50.0) * upd.dt;
}
}
fn on_draw(&mut self, e: Input, ren: RenderArgs, w: &mut PistonWindow) {
w.draw_2d(&e, |c, g| {
clear([0.0, 0.0, 0.0, 1.0], g);
let center = c.transform.trans((ren.width / 2) as f64, (ren.height / 2) as f64);
let square = rectangle::square(0.0, 0.0, 100.0);
let red = [1.0, 0.0, 0.0, 1.0];
rectangle(red, square, center.trans(self.x, self.y).rot_rad(self.rotation).trans(-50.0, -50.0), g);
});
}
fn on_input(&mut self, inp: Input) {
match inp {
Input::Press(but) => {
match but {
Button::Keyboard(Key::Up) => {
self.up_d = true;
}
Button::Keyboard(Key::Down) => {
self.down_d = true;
}
Button::Keyboard(Key::Left) => {
self.left_d = true;
}
Button::Keyboard(Key::Right) => {
self.right_d = true;
}
_ => {}
}
}
Input::Release(but) => {
match but {
Button::Keyboard(Key::Up) => {
self.up_d = false;
}
Button::Keyboard(Key::Down) => {
self.down_d = false;
}
Button::Keyboard(Key::Left) => {
self.left_d = false;
}
Button::Keyboard(Key::Right) => {
self.right_d = false;
}
_ => {}
}
}
_ => {}
}
}
}
fn main() {
let mut window: PistonWindow = WindowSettings::new(
"piston-tutorial",
[600, 600]
)
.exit_on_esc(true)
.build()
.unwrap();
let mut game = Game::new();
while let Some(e) = window.next() {
match e {
Input::Render(r) => {
game.on_draw(e, r, &mut window);
}
Input::Update(u) => {
game.on_update(u);
}
Input::Press(_) => {
game.on_input(e);
}
_ => {}
}
}
}
