Three.js Virtual Dressing Room Implementation Advice

Based on your project goals and challenges, here are some recommendations for implementing a virtual dressing room with adjustable avatars in Three.js.

Body Modification Approach

Skeleton-Based Scaling vs. Morph Targets

For your use case with adjustable body proportions, a combination approach would work best:

1. Skeleton-based scaling (SkinnedMesh) - Best for:

   • Overall height adjustments
   • Limb length modifications
   • Basic proportional changes

2. Morph targets - Best for:

   • Subtle shape changes (weight distribution)
   • Facial features
   • Muscle definition

The SkinnedMesh class in Three.js would be your primary tool, as it allows for bone-based deformations.

Clothing Implementation

Separate Models vs. Cloth Physics

For a beginner project focused on trying different sizes:

1. Separate 3D models for clothing - Recommended approach:

   • More performant for web applications
   • Easier to implement
   • Better control over pre-designed fits

2. Cloth physics - More complex but realistic:

   • Significantly more resource-intensive
   • Requires additional libraries
   • Better for advanced projects

Handling Size Variations

For clothing sizes (XS to XL):

1. Dynamically scale a single mesh - Simpler but less realistic:

   • Adjust the mesh proportions based on size selection
   • Works well for simple clothing items

2. Separate models for each size - More realistic but requires more assets:

   • Better representation of how clothing actually fits differently
   • More control over specific size characteristics

Implementation Recommendations

1. Use SkinnedMesh for your avatar:

   JAVASCRIPTCopied
   // Example of loading a skinned mesh
   const loader = new THREE.GLTFLoader();
   loader.load('avatar.glb', (gltf) => {
     const avatar = gltf.scene;
     const skinnedMesh = avatar.getObjectByProperty('type', 'SkinnedMesh');
     scene.add(avatar);
   });

2. For body adjustments, manipulate the skeleton bones:

   JAVASCRIPTCopied
   // Example of adjusting height
   function adjustHeight(value) {
     // Find torso and leg bones
     const spine = skeleton.getBoneByName('spine');
     const leftLeg = skeleton.getBoneByName('leftLeg');
     const rightLeg = skeleton.getBoneByName('rightLeg');
     
     // Scale bones
     spine.scale.y = value;
     leftLeg.scale.y = value;
     rightLeg.scale.y = value;
   }

3. For clothing, use SkinnedMesh that shares the same skeleton:

   JAVASCRIPTCopied
   // Example of adding clothing that follows the avatar's skeleton
   const clothingMesh = new THREE.SkinnedMesh(
     clothingGeometry,
     clothingMaterial
   );
   clothingMesh.bind(avatarMesh.skeleton);
   scene.add(clothingMesh);

Relevant Three.js Objects

Based on your project requirements, these Three.js objects will be most useful:

• SkinnedMesh: For the avatar and clothing that deforms with the skeleton
• Skeleton: To define the bone structure
• Bone: Individual bones that can be manipulated
• Group: To organize your avatar and clothing hierarchically
• Mesh: For non-deformable accessories or props

Additional Resources

While not directly available in the provided context, you might want to look into:

1. Three.js examples for skinned mesh animations
2. Libraries like Mixamo for rigged character models
3. The Three.js editor for testing bone manipulations

This approach should give you a solid foundation for your virtual dressing room while keeping the implementation complexity manageable for a beginner.