Step-by-step guide to integrating a simple LOD system for a 3D JSON asset

Question

Step-by-step guide to integrating a simple LOD system for a 3D JSON asset

I'm facing difficulty implementing Level of Detail (LOD) for a 3D object using JSON data. Below is my current implementation:

loader.load('models/robot-threejs/robot.json', function(object){
    var lod = new THREE.LOD(object);

    for (var i=1; i<=3;i++) {
        console.log("Level"+i);
       lod.addLevel(object,i);
         }

         lod.updateMatrix();
lod.matrixAutoUpdate = false;

    //     lod.updateMatrix();
    //     lod.matrixAutoUpdate = false;
        
        scene.add(lod);
     //scene.add(object);
    // object.position.set(30, 30, 30);
    
})

javascript three.js 3d

Answer 1

Answer №1

Your implementation of THREE.LOD needs some adjustments.

When creating a new instance of THREE.LOD, remember that the constructor does not accept any parameters. Instead of passing an object like this: new THREE.LOD(object);, simply use new THREE.LOD();
To achieve varying levels of detail, make sure to create distinct meshes with different geometries instead of adding the same mesh multiple times to the LOD. You'll need to generate these geometries on your own as Three.js won't do it automatically. Consider using the SimplifyModifier for help in this process.
Avoid unnecessary matrix updates in this context as they are not required.
Don't forget to call lod.update(camera) within your render loop to observe changes in detail.

I highly recommend consulting the official LOD documentation and examining the code in this example to deepen your understanding of how it operates.

Answer 2

Your implementation of THREE.LOD needs some adjustments.

When creating a new instance of THREE.LOD, remember that the constructor does not accept any parameters. Instead of passing an object like this: new THREE.LOD(object);, simply use new THREE.LOD();
To achieve varying levels of detail, make sure to create distinct meshes with different geometries instead of adding the same mesh multiple times to the LOD. You'll need to generate these geometries on your own as Three.js won't do it automatically. Consider using the SimplifyModifier for help in this process.
Avoid unnecessary matrix updates in this context as they are not required.
Don't forget to call lod.update(camera) within your render loop to observe changes in detail.

I highly recommend consulting the official LOD documentation and examining the code in this example to deepen your understanding of how it operates.

Step-by-step guide to integrating a simple LOD system for a 3D JSON asset

Answer №1

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