Playcanvas Engine

import * as pc from 'playcanvas';

// Create canvas
const canvas = document.createElement('canvas');
document.body.appendChild(canvas);

// Create application
const app = new pc.Application(canvas, {
  keyboard: new pc.Keyboard(window),
  mouse: new pc.Mouse(canvas),
  touch: new pc.TouchDevice(canvas),
  gamepads: new pc.GamePads()
});

// Configure canvas
app.setCanvasFillMode(pc.FILLMODE_FILL_WINDOW);
app.setCanvasResolution(pc.RESOLUTION_AUTO);

// Handle resize
window.addEventListener('resize', () => app.resizeCanvas());

// Start the application
app.start();

// Create entity
const entity = new pc.Entity('myEntity');

// Add to scene hierarchy
app.root.addChild(entity);

// Add components
entity.addComponent('model', {
  type: 'box'
});

entity.addComponent('script');

// Transform
entity.setPosition(0, 1, 0);
entity.setEulerAngles(0, 45, 0);
entity.setLocalScale(2, 2, 2);

// Parent-child hierarchy
const parent = new pc.Entity('parent');
const child = new pc.Entity('child');
parent.addChild(child);

app.on('update', (dt) => {
  // dt is delta time in seconds
  entity.rotate(0, 10 * dt, 0);
});

app.on('prerender', () => {
  // Before rendering
});

app.on('postrender', () => {
  // After rendering
});

entity.addComponent('model', {
  type: 'box',           // 'box', 'sphere', 'cylinder', 'cone', 'capsule', 'asset'
  material: material,
  castShadows: true,
  receiveShadows: true
});

entity.addComponent('camera', {
  clearColor: new pc.Color(0.1, 0.2, 0.3),
  fov: 45,
  nearClip: 0.1,
  farClip: 1000,
  projection: pc.PROJECTION_PERSPECTIVE  // or PROJECTION_ORTHOGRAPHIC
});

entity.addComponent('light', {
  type: pc.LIGHTTYPE_DIRECTIONAL,  // DIRECTIONAL, POINT, SPOT
  color: new pc.Color(1, 1, 1),
  intensity: 1,
  castShadows: true,
  shadowDistance: 50
});

entity.addComponent('rigidbody', {
  type: pc.BODYTYPE_DYNAMIC,  // STATIC, DYNAMIC, KINEMATIC
  mass: 1,
  friction: 0.5,
  restitution: 0.3
});

entity.addComponent('collision', {
  type: 'box',
  halfExtents: new pc.Vec3(0.5, 0.5, 0.5)
});

import * as pc from 'playcanvas';

// Initialize application
const canvas = document.createElement('canvas');
document.body.appendChild(canvas);

const app = new pc.Application(canvas);
app.setCanvasFillMode(pc.FILLMODE_FILL_WINDOW);
app.setCanvasResolution(pc.RESOLUTION_AUTO);
window.addEventListener('resize', () => app.resizeCanvas());

// Create camera
const camera = new pc.Entity('camera');
camera.addComponent('camera', {
  clearColor: new pc.Color(0.2, 0.3, 0.4)
});
camera.setPosition(0, 2, 5);
camera.lookAt(0, 0, 0);
app.root.addChild(camera);

// Create directional light
const light = new pc.Entity('light');
light.addComponent('light', {
  type: pc.LIGHTTYPE_DIRECTIONAL,
  castShadows: true
});
light.setEulerAngles(45, 30, 0);
app.root.addChild(light);

// Create ground
const ground = new pc.Entity('ground');
ground.addComponent('model', {
  type: 'plane'
});
ground.setLocalScale(10, 1, 10);
app.root.addChild(ground);

// Create cube
const cube = new pc.Entity('cube');
cube.addComponent('model', {
  type: 'box',
  castShadows: true
});
cube.setPosition(0, 1, 0);
app.root.addChild(cube);

// Animate cube
app.on('update', (dt) => {
  cube.rotate(10 * dt, 20 * dt, 30 * dt);
});

app.start();

// Create asset for model
const modelAsset = new pc.Asset('model', 'container', {
  url: '/models/character.glb'
});

// Add to asset registry
app.assets.add(modelAsset);

// Load asset
modelAsset.ready((asset) => {
  // Create entity from loaded model
  const entity = asset.resource.instantiateRenderEntity();

  app.root.addChild(entity);

  // Scale and position
  entity.setLocalScale(2, 2, 2);
  entity.setPosition(0, 0, 0);
});

app.assets.load(modelAsset);

modelAsset.ready((asset) => {
  console.log('Model loaded:', asset.name);
  const entity = asset.resource.instantiateRenderEntity();
  app.root.addChild(entity);
});

modelAsset.on('error', (err) => {
  console.error('Failed to load model:', err);
});

app.assets.load(modelAsset);

// Create material
const material = new pc.StandardMaterial();
material.diffuse = new pc.Color(1, 0, 0);  // Red
material.metalness = 0.5;
material.gloss = 0.8;
material.update();

// Apply to entity
entity.model.material = material;

// With textures
const textureAsset = new pc.Asset('diffuse', 'texture', {
  url: '/textures/brick_diffuse.jpg'
});

app.assets.add(textureAsset);
app.assets.load(textureAsset);

textureAsset.ready((asset) => {
  material.diffuseMap = asset.resource;
  material.update();
});

// PBR material with all maps
const pbrMaterial = new pc.StandardMaterial();

// Load all textures
const textures = {
  diffuse: '/textures/albedo.jpg',
  normal: '/textures/normal.jpg',
  metalness: '/textures/metalness.jpg',
  gloss: '/textures/roughness.jpg',
  ao: '/textures/ao.jpg'
};

Object.keys(textures).forEach(key => {
  const asset = new pc.Asset(key, 'texture', { url: textures[key] });
  app.assets.add(asset);

  asset.ready((loadedAsset) => {
    switch(key) {
      case 'diffuse':
        pbrMaterial.diffuseMap = loadedAsset.resource;
        break;
      case 'normal':
        pbrMaterial.normalMap = loadedAsset.resource;
        break;
      case 'metalness':
        pbrMaterial.metalnessMap = loadedAsset.resource;
        break;
      case 'gloss':
        pbrMaterial.glossMap = loadedAsset.resource;
        break;
      case 'ao':
        pbrMaterial.aoMap = loadedAsset.resource;
        break;
    }
    pbrMaterial.update();
  });

  app.assets.load(asset);
});

import * as pc from 'playcanvas';

// Initialize with Ammo.js
const app = new pc.Application(canvas, {
  keyboard: new pc.Keyboard(window),
  mouse: new pc.Mouse(canvas)
});

// Load Ammo.js
const ammoScript = document.createElement('script');
ammoScript.src = 'https://cdn.jsdelivr.net/npm/ammo.js@0.0.10/ammo.js';
document.body.appendChild(ammoScript);

ammoScript.onload = () => {
  Ammo().then((AmmoLib) => {
    window.Ammo = AmmoLib;

    // Create static ground
    const ground = new pc.Entity('ground');
    ground.addComponent('model', { type: 'plane' });
    ground.setLocalScale(10, 1, 10);

    ground.addComponent('rigidbody', {
      type: pc.BODYTYPE_STATIC
    });

    ground.addComponent('collision', {
      type: 'box',
      halfExtents: new pc.Vec3(5, 0.1, 5)
    });

    app.root.addChild(ground);

    // Create dynamic cube
    const cube = new pc.Entity('cube');
    cube.addComponent('model', { type: 'box' });
    cube.setPosition(0, 5, 0);

    cube.addComponent('rigidbody', {
      type: pc.BODYTYPE_DYNAMIC,
      mass: 1,
      friction: 0.5,
      restitution: 0.5
    });

    cube.addComponent('collision', {
      type: 'box',
      halfExtents: new pc.Vec3(0.5, 0.5, 0.5)
    });

    app.root.addChild(cube);

    // Apply force
    cube.rigidbody.applyForce(10, 0, 0);
    cube.rigidbody.applyTorque(0, 10, 0);

    app.start();
  });
};

// Define script class
const RotateScript = pc.createScript('rotate');

// Script attributes (editor-exposed)
RotateScript.attributes.add('speed', {
  type: 'number',
  default: 10,
  title: 'Rotation Speed'
});

RotateScript.attributes.add('axis', {
  type: 'vec3',
  default: [0, 1, 0],
  title: 'Rotation Axis'
});

// Initialize method
RotateScript.prototype.initialize = function() {
  console.log('RotateScript initialized');
};

// Update method (called every frame)
RotateScript.prototype.update = function(dt) {
  this.entity.rotate(
    this.axis.x * this.speed * dt,
    this.axis.y * this.speed * dt,
    this.axis.z * this.speed * dt
  );
};

// Cleanup
RotateScript.prototype.destroy = function() {
  console.log('RotateScript destroyed');
};

// Usage
const entity = new pc.Entity('rotatingCube');
entity.addComponent('model', { type: 'box' });
entity.addComponent('script');
entity.script.create('rotate', {
  attributes: {
    speed: 20,
    axis: new pc.Vec3(0, 1, 0)
  }
});
app.root.addChild(entity);

const MyScript = pc.createScript('myScript');

MyScript.prototype.initialize = function() {
  // Called once after all resources are loaded
};

MyScript.prototype.postInitialize = function() {
  // Called after all entities have initialized
};

MyScript.prototype.update = function(dt) {
  // Called every frame before rendering
};

MyScript.prototype.postUpdate = function(dt) {
  // Called every frame after update
};

MyScript.prototype.swap = function(old) {
  // Hot reload support
};

MyScript.prototype.destroy = function() {
  // Cleanup when entity is destroyed
};

// Keyboard
if (app.keyboard.isPressed(pc.KEY_W)) {
  entity.translate(0, 0, -speed * dt);
}

if (app.keyboard.wasPressed(pc.KEY_SPACE)) {
  entity.rigidbody.applyImpulse(0, 10, 0);
}

// Mouse
app.mouse.on(pc.EVENT_MOUSEDOWN, (event) => {
  if (event.button === pc.MOUSEBUTTON_LEFT) {
    console.log('Left click at', event.x, event.y);
  }
});

app.mouse.on(pc.EVENT_MOUSEMOVE, (event) => {
  const dx = event.dx;
  const dy = event.dy;
  camera.rotate(-dy * 0.2, -dx * 0.2, 0);
});

// Touch
app.touch.on(pc.EVENT_TOUCHSTART, (event) => {
  event.touches.forEach((touch) => {
    console.log('Touch at', touch.x, touch.y);
  });
});

// Raycasting (mouse picking)
app.mouse.on(pc.EVENT_MOUSEDOWN, (event) => {
  const camera = app.root.findByName('camera');
  const cameraComponent = camera.camera;

  const from = cameraComponent.screenToWorld(
    event.x,
    event.y,
    cameraComponent.nearClip
  );

  const to = cameraComponent.screenToWorld(
    event.x,
    event.y,
    cameraComponent.farClip
  );

  const result = app.systems.rigidbody.raycastFirst(from, to);

  if (result) {
    console.log('Hit:', result.entity.name);
    result.entity.model.material.emissive = new pc.Color(1, 0, 0);
  }
});

// Load animated model
const modelAsset = new pc.Asset('character', 'container', {
  url: '/models/character.glb'
});

app.assets.add(modelAsset);

modelAsset.ready((asset) => {
  const entity = asset.resource.instantiateRenderEntity();
  app.root.addChild(entity);

  // Get animation component
  entity.addComponent('animation', {
    assets: [asset],
    speed: 1.0,
    loop: true,
    activate: true
  });

  // Play specific animation
  entity.animation.play('Walk', 0.2);  // 0.2s blend time

  // Later, transition to run
  entity.animation.play('Run', 0.5);
});

app.assets.load(modelAsset);

// Animate position
entity.tween(entity.getLocalPosition())
  .to({ x: 5, y: 2, z: 0 }, 2.0, pc.SineInOut)
  .start();

// Animate rotation
entity.tween(entity.getLocalEulerAngles())
  .to({ x: 0, y: 180, z: 0 }, 1.0, pc.Linear)
  .loop(true)
  .yoyo(true)
  .start();

// Animate material color
const color = material.emissive;
app.tween(color)
  .to(new pc.Color(1, 0, 0), 1.0, pc.SineInOut)
  .yoyo(true)
  .loop(true)
  .start();

// Chain tweens
entity.tween(entity.getLocalPosition())
  .to({ y: 2 }, 1.0)
  .to({ y: 0 }, 1.0)
  .delay(0.5)
  .repeat(3)
  .start();

import React, { useEffect, useRef } from 'react';
import * as pc from 'playcanvas';

function PlayCanvasScene() {
  const canvasRef = useRef(null);
  const appRef = useRef(null);

  useEffect(() => {
    // Initialize
    const app = new pc.Application(canvasRef.current);
    appRef.current = app;

    app.setCanvasFillMode(pc.FILLMODE_FILL_WINDOW);
    app.setCanvasResolution(pc.RESOLUTION_AUTO);

    // Create scene
    const camera = new pc.Entity('camera');
    camera.addComponent('camera', {
      clearColor: new pc.Color(0.1, 0.2, 0.3)
    });
    camera.setPosition(0, 0, 5);
    app.root.addChild(camera);

    const cube = new pc.Entity('cube');
    cube.addComponent('model', { type: 'box' });
    app.root.addChild(cube);

    const light = new pc.Entity('light');
    light.addComponent('light');
    light.setEulerAngles(45, 0, 0);
    app.root.addChild(light);

    app.on('update', (dt) => {
      cube.rotate(10 * dt, 20 * dt, 30 * dt);
    });

    app.start();

    // Cleanup
    return () => {
      app.destroy();
    };
  }, []);

  return (
    <canvas
      ref={canvasRef}
      style={{ width: '100%', height: '100vh' }}
    />
  );
}

export default PlayCanvasScene;

// Export from PlayCanvas Editor
// Download build files, then load in code:

import * as pc from 'playcanvas';

const app = new pc.Application(canvas);

// Load exported project config
fetch('/config.json')
  .then(response => response.json())
  .then(config => {
    // Load scene
    app.scenes.loadSceneHierarchy(config.scene_url, (err, parent) => {
      if (err) {
        console.error('Failed to load scene:', err);
        return;
      }

      // Start application
      app.start();

      // Find entities by name
      const player = app.root.findByName('Player');
      const enemy = app.root.findByName('Enemy');

      // Access scripts
      player.script.myScript.doSomething();
    });
  });