Removing Unwanted Bounding Box from 3D Models

Based on your screenshots, it appears you're experiencing an issue where some of your IFC/GLB models are being rendered with an unwanted bounding box or container around them. This is a common issue when working with 3D models in Three.js.

Possible Causes and Solutions

1. Using the GLTFLoader

When loading GLB files, you should be using the GLTFLoader. Make sure you're properly traversing the loaded model to identify and remove any unwanted geometry:

JAVASCRIPTCopied
import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader';

const loader = new GLTFLoader();
loader.load('path/to/your/model.glb', (gltf) => {
  const model = gltf.scene;
  
  // Traverse the model to find and remove unwanted elements
  model.traverse((child) => {
    // Check if this is the unwanted bounding box
    if (child.isMesh && child.name.includes('BoundingBox') || 
        (child.geometry && child.geometry.type === 'BoxGeometry')) {
      child.visible = false; // Hide it instead of removing to preserve hierarchy
      // Or remove it completely if appropriate:
      // child.parent.remove(child);
    }
  });
  
  scene.add(model);
});

2. Check for Helper Objects

The box might be a helper object that was accidentally exported with the model:

JAVASCRIPTCopied
// After loading the model
model.traverse((child) => {
  // Look for objects that might be helpers
  if (child.isObject3D && 
     (child.name.includes('helper') || 
      child.name.includes('box') || 
      child.name.includes('bound'))) {
    console.log('Found potential helper:', child.name);
    child.visible = false;
  }
});

3. For IFC Files

If you're using IFC files, you might need a specific IFC loader like IFCLoader:

JAVASCRIPTCopied
import { IFCLoader } from 'three/examples/jsm/loaders/IFCLoader';

const ifcLoader = new IFCLoader();
ifcLoader.ifcManager.setWasmPath('path-to-wasm-files/');
ifcLoader.load('path/to/your/model.ifc', (model) => {
  // Similar traversal to find and remove unwanted elements
  scene.add(model);
});

4. Inspect Model Structure

It might be helpful to log the structure of your loaded model to identify the unwanted box:

JAVASCRIPTCopied
function logModelStructure(object, indent = 0) {
  const spaces = ' '.repeat(indent);
  console.log(`${spaces}${object.name || 'unnamed'} (${object.type})`);
  
  if (object.children) {
    object.children.forEach(child => {
      logModelStructure(child, indent + 2);
    });
  }
}

// After loading the model
logModelStructure(model);

5. Check for Bounding Box Helpers

If you're using any BoxHelper or Box3Helper in your code, make sure they're not being added unintentionally:

JAVASCRIPTCopied
// Remove any existing helpers
scene.children.forEach(child => {
  if (child.isBoxHelper || child.isBox3Helper) {
    scene.remove(child);
  }
});

Try these approaches to identify and remove the unwanted box from your models. If the issue persists, you might need to examine the specific structure of the problematic models to determine the exact nature of the unwanted box.