arkanoid/src/main.js

import './style.css';
import { Application, Assets, Container, Graphics, Sprite } from 'pixi.js';
import {
  BALL_INITIAL_ANGLE,
  BALL_RADIUS,
  BALL_SPEED,
  CONTAINER_HEIGHT,
  CONTAINER_WIDTH,
  PADDLE_HEIGHT,
  PADDLE_WIDTH,
} from './config';

(async () => {
  // Create a new application
  const app = new Application();

  // Initialize the application
  await app.init({ background: '#1099bb', width: CONTAINER_WIDTH, height: CONTAINER_HEIGHT });

  // Append the application canvas to the document body
  document.body.appendChild(app.canvas);

  // Create and add a container to the stage
  const container = new Container({
    eventMode: 'static',
    hitArea: app.screen,
  });

  container.x = 0;
  container.y = 0;

  app.stage.addChild(container);

  const paddle = new Graphics().rect(0, CONTAINER_HEIGHT - PADDLE_HEIGHT, PADDLE_WIDTH, PADDLE_HEIGHT).fill('#fff000');
  container.addChild(paddle);

  container.on('pointermove', (event) => {
    const localPosition = container.toLocal(event.global);

    if (localPosition.x < CONTAINER_WIDTH - PADDLE_WIDTH) {
      paddle.x = localPosition.x;
    }
  });

  const ball = new Graphics().circle(0, 0, BALL_RADIUS).fill('#ffffff');
  container.addChild(ball);

  const leftBoundary = BALL_RADIUS;
  const rightBoundary = CONTAINER_WIDTH - BALL_RADIUS;
  const topBoundary = BALL_RADIUS;
  const bottomBoundary = CONTAINER_HEIGHT - BALL_RADIUS;
  const paddleTop = CONTAINER_HEIGHT - PADDLE_HEIGHT;

  let horizontalSpeed = BALL_SPEED * Math.cos(BALL_INITIAL_ANGLE);
  let verticalSpeed = -1 * BALL_SPEED * Math.sin(BALL_INITIAL_ANGLE);

  app.ticker.add((time) => {
    // Не даем выйти за границы стен слева / справав и меняем направление
    if (ball.x <= leftBoundary || ball.x >= rightBoundary) {
      ball.x = ball.x <= leftBoundary ? leftBoundary : rightBoundary;
      horizontalSpeed *= -1;
    }

    // Не даем выйти за границы стен сверху / снизу и меняем направление
    if (ball.y <= topBoundary || ball.y >= bottomBoundary) {
      ball.y = ball.y <= topBoundary ? topBoundary : bottomBoundary;
      verticalSpeed *= -1;
    }

    // Базоввое взаимодействие мяча и ракетки
    if (
      verticalSpeed > 0 &&
      ball.y + BALL_RADIUS >= paddleTop &&
      ball.x >= paddle.x &&
      ball.x <= paddle.x + PADDLE_WIDTH
    ) {
      verticalSpeed *= -1;
    }

    ball.x += horizontalSpeed * time.deltaTime;
    ball.y += verticalSpeed * time.deltaTime;
  });
})();