Resolving GLB Loading Issues in Angular 16 with Three.js

The error you're encountering is related to type declarations for the KTX2Loader, which is indirectly being referenced by the GLTFLoader's dependencies. This is a common issue when working with Three.js in TypeScript environments like Angular.

Solution Options

Option 1: Use Direct Import Without Type Checking

You can bypass the TypeScript error by importing the GLTFLoader directly from the JavaScript file and adding a TypeScript ignore comment:

TYPESCRIPTCopied
// @ts-ignore
import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader.js';

Option 2: Update Three.js and Types

Make sure your Three.js and @types/three versions are compatible. Try updating to a version where the type definitions are properly aligned:

BASHCopied
npm install three@0.150.0 @types/three@0.150.0 --save

Option 3: Create a Custom Declaration File

Create a declaration file (e.g., custom-types.d.ts) in your project root:

TYPESCRIPTCopied
declare module 'three/webgpu' {
  export class Renderer {}
  export class WebGPURenderer {}
}

Option 4: Use Alternative Import Method

Instead of importing from the examples directory, you can try importing from the addons path:

TYPESCRIPTCopied
import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';

Code Improvements

Your current implementation has a few issues that should be addressed:

1. The scene is defined after the loader tries to use it
2. The asset path might be incorrect

Here's an improved version of your code:

TYPESCRIPTCopied
ngAfterViewInit(): void {
  const width = window.innerWidth, height = window.innerHeight;
  const canvas = document.getElementById('canvas') as HTMLCanvasElement;
  const renderer = new THREE.WebGLRenderer({ canvas: canvas, antialias: true, alpha: true });
  renderer.setSize(400, 200);

  const camera = new THREE.PerspectiveCamera(70, width / height, 0.01, 10);
  camera.position.z = 1;

  const scene = new THREE.Scene();

  // Create a basic geometry while the model loads
  const geometry = new THREE.BoxGeometry(0.5, 0.5, 0.5);
  const material = new THREE.MeshNormalMaterial();
  const mesh = new THREE.Mesh(geometry, material);
  scene.add(mesh);

  // Load the GLB model
  const loader = new GLTFLoader();
  loader.load('assets/models/Mona.glb', (gltf) => {
    scene.add(gltf.scene);
    // Position or scale the model as needed
    gltf.scene.position.set(0, 0, 0);
    gltf.scene.scale.set(0.5, 0.5, 0.5);
  }, 
  (progress) => {
    console.log((progress.loaded / progress.total * 100) + '% loaded');
  }, 
  (error) => {
    console.error('An error happened', error);
  });

  // Animation loop
  function animate(time: number) {
    mesh.rotation.x = time / 2000;
    mesh.rotation.y = time / 1000;
    renderer.render(scene, camera);
  }
  
  renderer.setAnimationLoop(animate);
}

Additional Notes

1. Make sure your GLB file is in the correct assets directory. In Angular, assets should be in the src/assets folder, but referenced as just assets/... in the code.

2. If you're still having issues, you might want to consider using a simpler loader like OBJLoader as an alternative, though GLB/GLTF is generally preferred for modern 3D web applications.

3. Remember that Three.js is primarily designed for web environments, so some components might have compatibility issues in different environments as mentioned in the documentation.