import { Application } from 'pixi.js';

const app = new Application();

await app.init({
  width: 800,
  height: 600,
  backgroundColor: 0x1099bb,
});

document.body.appendChild(app.canvas);

import { Container } from 'pixi.js';

const container = new Container({
  x: 100,
  y: 100,
});

app.stage.addChild(container);

// Local to global
const globalPos = obj.toGlobal(new Point(0, 0));

// Global to local
const localPos = container.toLocal(new Point(100, 100));

container.cullable = true;        // Enable culling
container.cullableChildren = true; // Cull children recursively
container.cullArea = new Rectangle(0, 0, 400, 400); // Custom cull bounds

import { Sprite, Assets } from 'pixi.js';

const texture = await Assets.load('bunny.png');
const sprite = new Sprite(texture);

sprite.anchor.set(0.5);  // Center anchor
sprite.x = 100;
sprite.y = 100;
sprite.tint = 0xff0000;  // Red tint
sprite.alpha = 0.8;

import { Graphics } from 'pixi.js';

// Draw shape, then fill/stroke
const graphics = new Graphics()
  .rect(50, 50, 100, 100)
  .fill(0xff0000)
  .stroke({ width: 2, color: 'white' });

// Circle with fill and stroke
const circle = new Graphics()
  .circle(100, 100, 50)
  .fill({ color: 0x00ff00, alpha: 0.5 })
  .stroke({ width: 3, color: 0x000000 });

const lines = new Graphics()
  .moveTo(0, 0)
  .lineTo(100, 100)
  .lineTo(200, 0)
  .stroke({ width: 2, color: 0xff0000 });

const rectWithHole = new Graphics()
  .rect(0, 0, 100, 100)
  .fill(0x00ff00)
  .circle(50, 50, 20)
  .cut();  // Creates hole

import { GraphicsContext, Graphics } from 'pixi.js';

const context = new GraphicsContext()
  .rect(0, 0, 100, 100)
  .fill(0xff0000);

const g1 = new Graphics(context);
const g2 = new Graphics(context); // Shares same data

import { Text, TextStyle } from 'pixi.js';

const text = new Text({
  text: 'Hello World',
  style: {
    fontFamily: 'Arial',
    fontSize: 24,
    fill: 0xffffff,
    align: 'center',
  },
});

import { BitmapText } from 'pixi.js';

const bitmapText = new BitmapText({
  text: 'Score: 1000',
  style: { fontFamily: 'MyBitmapFont', fontSize: 32 },
});

import { Assets, Sprite } from 'pixi.js';

// Single asset
const texture = await Assets.load('path/to/image.png');
const sprite = new Sprite(texture);

// Multiple assets
const textures = await Assets.load(['a.png', 'b.png']);

// With alias
await Assets.load({ alias: 'hero', src: 'images/hero.png' });
const heroTexture = Assets.get('hero');

Assets.addBundle('game', [
  { alias: 'player', src: 'player.png' },
  { alias: 'enemy', src: 'enemy.png' },
]);

const assets = await Assets.loadBundle('game');

const manifest = {
  bundles: [
    {
      name: 'load-screen',
      assets: [{ alias: 'bg', src: 'background.png' }],
    },
    {
      name: 'game',
      assets: [{ alias: 'hero', src: 'hero.png' }],
    },
  ],
};

await Assets.init({ manifest });
await Assets.loadBundle('load-screen');

// As texture
const svgTexture = await Assets.load('icon.svg');
const sprite = new Sprite(svgTexture);

// As Graphics (scalable)
const svgContext = await Assets.load({
  src: 'icon.svg',
  data: { parseAsGraphicsContext: true },
});
const graphics = new Graphics(svgContext);

// Unload from cache and GPU
await Assets.unload('texture.png');

// Unload from GPU only (keep in memory)
texture.source.unload();

// Destroy texture
texture.destroy();

import { Ticker, UPDATE_PRIORITY } from 'pixi.js';

// Using app ticker
app.ticker.add((ticker) => {
  sprite.rotation += 0.1 * ticker.deltaTime;
});

// One-time callback
app.ticker.addOnce((ticker) => {
  console.log('Called once');
});

// With priority (higher runs first)
app.ticker.add(updateFn, null, UPDATE_PRIORITY.HIGH);

app.ticker.maxFPS = 60;  // Cap framerate
app.ticker.minFPS = 30;  // Clamp deltaTime

sprite.eventMode = 'static';  // Interactive, non-moving
sprite.eventMode = 'dynamic'; // Interactive, moving (receives idle events)
sprite.eventMode = 'passive'; // Default, children can be interactive
sprite.eventMode = 'none';    // No interaction

sprite.eventMode = 'static';

sprite.on('pointerdown', (event) => {
  console.log('Clicked at', event.global.x, event.global.y);
});

sprite.on('pointermove', (event) => { /* ... */ });
sprite.on('pointerup', (event) => { /* ... */ });
sprite.on('pointerover', (event) => { /* ... */ });
sprite.on('pointerout', (event) => { /* ... */ });

import { Rectangle, Circle } from 'pixi.js';

sprite.hitArea = new Rectangle(0, 0, 100, 100);
// or
sprite.hitArea = new Circle(50, 50, 50);

sprite.cursor = 'pointer';
sprite.cursor = 'grab';
sprite.cursor = 'url(cursor.png), auto';

container.interactiveChildren = false; // Skip children hit testing

// OLD (v7)
const app = new Application({ width: 800 });

// NEW (v8)
const app = new Application();
await app.init({ width: 800 });

// OLD (v7)
graphics.beginFill(0xff0000).drawRect(0, 0, 100, 100).endFill();

// NEW (v8)
graphics.rect(0, 0, 100, 100).fill(0xff0000);

// OLD (v7)
ticker.add((dt) => sprite.rotation += dt);

// NEW (v8)
ticker.add((ticker) => sprite.rotation += ticker.deltaTime);

// OLD (v7)
app.view

// NEW (v8)
app.canvas

// OLD (v7)
const rect = container.getBounds();

// NEW (v8)
const rect = container.getBounds().rectangle;

import { Application, ApplicationOptions, Container } from 'pixi.js';

export class CameraView extends Application {
  constructor(public camera: Camera) {
    super();
  }

  public async initialize(
    pixiOptions: Partial<ApplicationOptions>,
    container: WidgetContainer
  ) {
    await super.init(pixiOptions);

    // Limit FPS to prevent GPU heating
    this.ticker.maxFPS = 30;

    // Handle resize
    container.on('resize', () => {
      this.resizeView(container.width, container.height);
    });

    // Append canvas
    container.getElement().append(this.canvas);
  }

  // Coordinate transformations
  public worldToScreen = (w: XY) => this.camera.worldToScreen(this.renderer, w.x, w.y);
  public screenToWorld = (s: XY) => this.camera.screenToWorld(this.renderer, s.x, s.y);

  // Layer management
  public addLayer(child: Container) {
    this.stage.addChild(child);
  }
}

import { Container, Graphics } from 'pixi.js';

export class GridLayer {
  private stage = new Container();
  private gridLines = new Graphics();

  constructor(private parent: CameraView) {
    this.parent.events.on('screenChanged', () => this.drawSectorGrid());
    this.stage.addChild(this.gridLines);
  }

  get renderRoot(): Container {
    return this.stage;
  }

  private drawSectorGrid() {
    // Clear and redraw
    this.gridLines.clear();

    // Draw lines using v8 API
    this.gridLines
      .moveTo(0, screen)
      .lineTo(this.parent.renderer.width, screen)
      .stroke({ width: 2, color: magnitude.color, alpha: 0.5 });
  }
}

// Drawing selection rectangle
const graphics = new Graphics();
graphics
  .rect(min.x, min.y, width, height)
  .fill({ color: selectionColor, alpha: 0.2 })
  .stroke({ width: 1, color: selectionColor, alpha: 1 });

// Drawing grid lines
this.gridLines
  .moveTo(0, screenY)
  .lineTo(rendererWidth, screenY)
  .stroke({ width: 2, color: lineColor, alpha: 0.5 });

private redraw() {
  this.graphics.clear();
  // ... draw new content
}

import { Container, FederatedPointerEvent, Rectangle } from 'pixi.js';

export class InteractiveLayer {
  private stage = new Container();

  constructor(private parent: CameraView) {
    // Set cursor
    this.stage.cursor = 'crosshair';

    // Enable interaction
    this.stage.interactive = true;

    // Set hit area to full canvas
    this.stage.hitArea = new Rectangle(
      0, 0,
      this.parent.renderer.width,
      this.parent.renderer.height
    );

    // Register events
    this.stage.on('pointerdown', this.onPointerDown);
    this.stage.on('pointermove', this.onPointerMove);
    this.stage.on('pointerup', this.onPointerUp);

    // Update hit area on resize
    this.parent.events.on('screenChanged', () => {
      this.stage.hitArea = new Rectangle(
        0, 0,
        this.parent.renderer.width,
        this.parent.renderer.height
      );
    });
  }

  private onPointerDown = (event: FederatedPointerEvent) => {
    const screenPos = XY.clone(event.global);
    const worldPos = this.parent.screenToWorld(screenPos);
    // ... handle interaction
  };
}

export class TextsPool {
  private texts: Text[] = [];

  constructor(private container: Container) {}

  *[Symbol.iterator]() {
    let index = 0;
    while (true) {
      if (index >= this.texts.length) {
        const text = new Text({ text: '', style: { ... } });
        this.texts.push(text);
        this.container.addChild(text);
      }
      const text = this.texts[index];
      text.visible = true;
      yield text;
      index++;
    }
  }

  return() {
    // Hide unused texts
    for (let i = this.usedCount; i < this.texts.length; i++) {
      this.texts[i].visible = false;
    }
  }
}

// Usage
const textsIterator = this.textsPool[Symbol.iterator]();
for (const item of items) {
  const text = textsIterator.next().value;
  text.text = item.label;
  text.x = item.x;
  text.y = item.y;
}
textsIterator.return(); // Hide unused