viewer.js

// viewer.js
// ==============================

let pc;
export let app = null;
let cameraEntity = null;
let modelEntity = null;
let viewerInitialized = false;
let resizeObserver = null;

let chosenCameraX, chosenCameraY, chosenCameraZ;
let minZoom, maxZoom, minAngle, maxAngle, minAzimuth, maxAzimuth, minPivotY, minY;
let modelX, modelY, modelZ, modelScale, modelRotationX, modelRotationY, modelRotationZ;
let plyUrl, glbUrl;

export async function initializeViewer(config, instanceId) {
  if (viewerInitialized) return;

  const isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent);
  const isMobile = isIOS || /Android/i.test(navigator.userAgent);

  plyUrl = config.ply_url;
  glbUrl = config.glb_url;
  minZoom = parseFloat(config.minZoom || "1");
  maxZoom = parseFloat(config.maxZoom || "20");
  minAngle = parseFloat(config.minAngle || "-45");
  maxAngle = parseFloat(config.maxAngle || "90");
  minAzimuth = parseFloat(config.minAzimuth || "-360");
  maxAzimuth = parseFloat(config.maxAzimuth || "360");
  minPivotY = parseFloat(config.minPivotY || "0");
  minY = parseFloat(config.minY || "0");

  modelX = parseFloat(config.modelX || "0");
  modelY = parseFloat(config.modelY || "0");
  modelZ = parseFloat(config.modelZ || "0");
  modelScale = parseFloat(config.modelScale || "1");
  modelRotationX = parseFloat(config.modelRotationX || "0");
  modelRotationY = parseFloat(config.modelRotationY || "0");
  modelRotationZ = parseFloat(config.modelRotationZ || "0");

  const cameraX = parseFloat(config.cameraX || "0");
  const cameraY = parseFloat(config.cameraY || "2");
  const cameraZ = parseFloat(config.cameraZ || "5");
  const cameraXPhone = parseFloat(config.cameraXPhone || cameraX);
  const cameraYPhone = parseFloat(config.cameraYPhone || cameraY);
  const cameraZPhone = parseFloat(config.cameraZPhone || (cameraZ * 1.5));

  chosenCameraX = isMobile ? cameraXPhone : cameraX;
  chosenCameraY = isMobile ? cameraYPhone : cameraY;
  chosenCameraZ = isMobile ? cameraZPhone : cameraZ;

  const canvasId = 'canvas-' + instanceId;
  const progressDialog = document.getElementById('progress-dialog-' + instanceId);
  const progressIndicator = document.getElementById('progress-indicator-' + instanceId);
  const viewerContainer = document.getElementById('viewer-container-' + instanceId);

  let oldCanvas = document.getElementById(canvasId);
  if (oldCanvas) oldCanvas.remove();

  const canvas = document.createElement('canvas');
  canvas.id = canvasId;
  canvas.className = 'ply-canvas';
  canvas.style.width = "100%";
  canvas.style.height = "100%";
  canvas.style.touchAction = "none";
  canvas.setAttribute('tabindex', '0');
  viewerContainer.insertBefore(canvas, progressDialog);

  if (!pc) {
    pc = await import("https://esm.run/playcanvas");
    window.pc = pc;
  }

  const device = await pc.createGraphicsDevice(canvas, {
    deviceTypes: ["webgl2"],
    glslangUrl: "https://playcanvas.vercel.app/static/lib/glslang/glslang.js",
    twgslUrl: "https://playcanvas.vercel.app/static/lib/twgsl/twgsl.js",
    antialias: false
  });
  device.maxPixelRatio = Math.min(window.devicePixelRatio, 2);

  const opts = new pc.AppOptions();
  opts.graphicsDevice = device;
  opts.mouse = new pc.Mouse(document.body);
  opts.touch = new pc.TouchDevice(document.body);
  opts.componentSystems = [
    pc.RenderComponentSystem,
    pc.CameraComponentSystem,
    pc.LightComponentSystem,
    pc.ScriptComponentSystem,
    pc.GSplatComponentSystem,
    pc.CollisionComponentSystem,
    pc.RigidbodyComponentSystem
  ];
  opts.resourceHandlers = [
    pc.TextureHandler,
    pc.ContainerHandler,
    pc.ScriptHandler,
    pc.GSplatHandler
  ];

  app = new pc.Application(canvas, opts);
  app.setCanvasFillMode(pc.FILLMODE_NONE);
  app.setCanvasResolution(pc.RESOLUTION_AUTO);

  resizeObserver = new ResizeObserver(entries => {
    entries.forEach(entry => {
      app.resizeCanvas(entry.contentRect.width, entry.contentRect.height);
    });
  });
  resizeObserver.observe(viewerContainer);

  window.addEventListener('resize', () => app.resizeCanvas(viewerContainer.clientWidth, viewerContainer.clientHeight));
  app.on('destroy', () => resizeObserver.disconnect());

  if (isIOS) {
    const originalRequest = pc.Http.request;
    pc.Http.request = function(options) {
      if (options && options.url.endsWith('.ply')) options.responseType = 'arraybuffer';
      return originalRequest.call(this, options);
    };
  }

  const assets = {
    model: new pc.Asset('gsplat', 'gsplat', { url: plyUrl }),
    orbit: new pc.Asset('script', 'script', { url: "https://mikafil-viewer-gs.static.hf.space/orbit-camera.js" }),
    galerie: new pc.Asset('galerie', 'container', { url: glbUrl }),
    hdr: new pc.Asset('hdr', 'texture', {
      url: "https://huggingface.co/datasets/bilca/ply_files/resolve/main/galeries/blanc.png"
    }, { type: pc.TEXTURETYPE_RGBP, mipmaps: false })
  };

  const loader = new pc.AssetListLoader(Object.values(assets), app.assets);
  loader.load(async () => {
    app.start();
    app.scene.envAtlas = assets.hdr.resource;

    modelEntity = new pc.Entity('model');
    modelEntity.addComponent('gsplat', { asset: assets.model });
    modelEntity.setLocalPosition(modelX, modelY, modelZ);
    modelEntity.setLocalEulerAngles(modelRotationX, modelRotationY, modelRotationZ);
    modelEntity.setLocalScale(modelScale, modelScale, modelScale);
    app.root.addChild(modelEntity);

    if (assets.galerie && assets.galerie.resource) {
      const galleryEntity = assets.galerie.resource.instantiateRenderEntity();
      app.root.addChild(galleryEntity);
    }

    cameraEntity = new pc.Entity('camera');
    cameraEntity.addComponent('camera', { clearColor: new pc.Color(0.2, 0.2, 0.2, 1) });
    cameraEntity.setPosition(chosenCameraX, chosenCameraY, chosenCameraZ);
    cameraEntity.lookAt(modelEntity.getPosition());

    cameraEntity.addComponent('script');
    cameraEntity.script.create('orbitCamera', {
      attributes: {
        inertiaFactor: 0.2,
        focusEntity: modelEntity,
        distanceMax: maxZoom,
        distanceMin: minZoom,
        pitchAngleMax: maxAngle,
        pitchAngleMin: minAngle,
        yawAngleMax: maxAzimuth,
        yawAngleMin: minAzimuth,
        minPivotY: minPivotY,
        frameOnStart: false
      }
    });
    cameraEntity.script.create('orbitCameraInputMouse', { attributes: { orbitSensitivity: isMobile ? 0.6 : 0.3 } });
    cameraEntity.script.create('orbitCameraInputTouch', { attributes: { orbitSensitivity: 0.6 } });
    app.root.addChild(cameraEntity);

    app.once('update', () => resetViewerCamera());
    app.on('update', () => {
      const pos = cameraEntity.getPosition();
      if (pos.y < minY) cameraEntity.setPosition(pos.x, minY, pos.z);
    });

    try {
      const tooltipsModule = await import('./tooltips.js');
      tooltipsModule.initializeTooltips({
        app, cameraEntity, modelEntity,
        tooltipsUrl: config.tooltips_url,
        defaultVisible: !!config.showTooltipsDefault,
        moveDuration: config.tooltipMoveDuration || 0.6
      });
    } catch {}

    progressDialog.style.display = 'none';
    viewerInitialized = true;
  });
}

export function resetViewerCamera() {
  if (!cameraEntity || !modelEntity || !app) return;
  cameraEntity.script.orbitCamera.reset();
}

export function cleanupViewer() {
  if (app) app.destroy();
  app = null;
  cameraEntity = null;
  modelEntity = null;
  viewerInitialized = false;
  if (resizeObserver) resizeObserver.disconnect();
  resizeObserver = null;
}