A guide to correctly importing a Json File into Three.js

Question

A guide to correctly importing a Json File into Three.js

I've been working on some cool projects in Blender and wanted to showcase one using threejs. However, I'm facing an issue where the object isn't displaying properly. Can someone guide me on how to correctly load a JSON file with keyframe animation?

I have the specific JSON file here that I need help loading.

Below is an excerpt of the code that I am currently using:

var mesh;
function initMesh() {
    var loader = new THREE.JSONLoader();
    loader.load('./ocean.json', function(geometry, materials) {
        mesh = new THREE.Mesh(geometry, new THREE.MeshFaceMaterial(materials));
        mesh.scale.x = 0.75;
        mesh.scale.y = 1;
        mesh.scale.z = 0.75;
        scene.add(mesh);
    }, undefined, function (e) {console.log('ERROR: ', e)});
}

javascript json three.js blender

Answer 1

Answer №1

If you're looking to dive into Three.js, a great starting point is their editor tool which you can find at:

The editor provides a user-friendly interface where you can easily import .json, .obj files, and more. It's a convenient way to visualize your creations, experiment with lighting, play around with materials, incorporate custom scripts, and much more. One useful feature is the ability to load an example project, remove default elements, import your own model, hit play, and if you're satisfied with the result, simply publish the project. This allows you to download the complete project package which can then be uploaded to your server as the foundation for future projects.

Starting with the editor is ideal for beginners as it functions smoothly and serves as a motivating platform for further exploration and learning.

While this may not directly address your query, I've encountered the frustration of dealing with incompatible loaders due to oversights like incorrect checkbox selections during exporting from software such as Blender. The editor eliminates such issues by offering a straightforward environment for creating and testing your Three.js projects.

My advice would be to familiarize yourself with the editor first, understand its features, and progress from there. Good luck on your Three.js journey!

Answer 2

If you're looking to dive into Three.js, a great starting point is their editor tool which you can find at:

The editor provides a user-friendly interface where you can easily import .json, .obj files, and more. It's a convenient way to visualize your creations, experiment with lighting, play around with materials, incorporate custom scripts, and much more. One useful feature is the ability to load an example project, remove default elements, import your own model, hit play, and if you're satisfied with the result, simply publish the project. This allows you to download the complete project package which can then be uploaded to your server as the foundation for future projects.

Starting with the editor is ideal for beginners as it functions smoothly and serves as a motivating platform for further exploration and learning.

While this may not directly address your query, I've encountered the frustration of dealing with incompatible loaders due to oversights like incorrect checkbox selections during exporting from software such as Blender. The editor eliminates such issues by offering a straightforward environment for creating and testing your Three.js projects.

My advice would be to familiarize yourself with the editor first, understand its features, and progress from there. Good luck on your Three.js journey!

Answer 3

Answer №2

Ensure proper rendering.

let scene, camera, renderer, controls;

// include stats for performance tracking
stats = createStats();
//document.body.appendChild(stats.domElement);

scene = new THREE.Scene();
scene.background = new THREE.Color(0xffffff);
camera = new THREE.PerspectiveCamera(2.5, window.innerWidth / 
window.innerHeight, 1, 1000);


renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);

//Triggering EventListener...
document.addEventListener('message', function(e) {
    let message = JSON.parse(e.data);
      if(message.type === 'xyz.json' || message.type === 'abc.json' || message.type === 'mno.json') {
        let modelName = `model/${message.type}`
        var objectLoader = new THREE.ObjectLoader();
        objectLoader.load(modelName, function(obj) {
          scene.add(obj);
          render();
          /* Handle react-native specific actions with below code block.
          awaitPostMessage();
          window.postMessage(JSON.stringify({
            type: 'READY_TO_RENDER'
          }), "*");
          */
        });
      }
 });//EventListener method Ends Here...


function render() {
  renderer.render(scene, camera);
}

Answer 4

Ensure proper rendering.

let scene, camera, renderer, controls;

// include stats for performance tracking
stats = createStats();
//document.body.appendChild(stats.domElement);

scene = new THREE.Scene();
scene.background = new THREE.Color(0xffffff);
camera = new THREE.PerspectiveCamera(2.5, window.innerWidth / 
window.innerHeight, 1, 1000);


renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);

//Triggering EventListener...
document.addEventListener('message', function(e) {
    let message = JSON.parse(e.data);
      if(message.type === 'xyz.json' || message.type === 'abc.json' || message.type === 'mno.json') {
        let modelName = `model/${message.type}`
        var objectLoader = new THREE.ObjectLoader();
        objectLoader.load(modelName, function(obj) {
          scene.add(obj);
          render();
          /* Handle react-native specific actions with below code block.
          awaitPostMessage();
          window.postMessage(JSON.stringify({
            type: 'READY_TO_RENDER'
          }), "*");
          */
        });
      }
 });//EventListener method Ends Here...


function render() {
  renderer.render(scene, camera);
}

A guide to correctly importing a Json File into Three.js

Answer №1

Answer №2

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