What is the best way to extract the geometry information from a gltf object?

Question

What is the best way to extract the geometry information from a gltf object?

I've been using three.js to load a gltf file with the gltfloader, and now I'm trying to create a particle system. However, I'm having trouble getting the geometry object that I need.

function initModel() {

    var planeGeometry = new THREE.PlaneGeometry(100, 100);
    var planeMaterial = new THREE.MeshLambertMaterial({color: 0xaaaaaa, 
    side: THREE.DoubleSide});
    var plane = new THREE.Mesh(planeGeometry, planeMaterial);
    plane.rotation.x = -0.5 * Math.PI;
    plane.position.y = -.1;
    plane.receiveShadow = true; 
    scene.add(plane);

    var loader = new THREE.GLTFLoader();
    loader.load('./../model/scene.gltf', function (gltf) {  
        gltf.scene.scale.set(10,10,10);
        //I'm stuck on how to access the geometry object here

    });


}

javascript three.js

Answer 1

Answer №1

To locate the mesh within the model, you can either traverse through the structure or utilize getObjectByName(MeshName) function if you already know the name of the mesh. Then, extract the geometry from the identified mesh. For instance:

var geometry = getObjectByName('Plane001').geometry;

Assuming the mesh is named Plane001.

I have devised a straightforward helper method for retrieving all children of a specific type from an object

findType(object, type) {
    object.children.forEach((child) => {
        if (child.type === type) {
            console.log(child);
        }
        this.findType(child, type);
    });
}

Subsequently, I would invoke findType(gltf.scene, 'Mesh') from the loader to display all meshes in the model

Answer 2

To locate the mesh within the model, you can either traverse through the structure or utilize getObjectByName(MeshName) function if you already know the name of the mesh. Then, extract the geometry from the identified mesh. For instance:

var geometry = getObjectByName('Plane001').geometry;

Assuming the mesh is named Plane001.

I have devised a straightforward helper method for retrieving all children of a specific type from an object

findType(object, type) {
    object.children.forEach((child) => {
        if (child.type === type) {
            console.log(child);
        }
        this.findType(child, type);
    });
}

Subsequently, I would invoke findType(gltf.scene, 'Mesh') from the loader to display all meshes in the model

What is the best way to extract the geometry information from a gltf object?

Answer №1

Similar questions

Make sure to update the package.json file at multiple locations following the execution of the "npm i" command

Using ThreeJS to project a mouse click onto the XZ plane

Ways to conceal the header and footer on specific React pages

Tips for extracting certain characters from a URL and saving them as an ID using JavaScript

What is the best way to export assets into a React Native JS file?

Discover the steps to retrieve a fresh array in PHP after utilizing sortable.js

Each time the page is reloaded, an error message pops up: "TypeError: Cannot access attributes of an undefined object (referencing 'name')."

Identifying Touch Interaction exclusively on WebGL Canvas within threejs

Dynamic website where each page is loaded based on the user's previous interaction

Controlling the Flow of Events in JavaScript Documents

What is the process of importing a file as text into vite.config.js?

Updating Angular Material theme variables during the build processIs this okay?

Is there a Facebook application embedded in the user's wall?

Incorporate concealed image into HTML

Utilize an external JavaScript file function within an AngularJS controller

Unable to delete a dynamically inserted <select> element by using the removeChild method

Utilizing Unidirectional Binding within an AngularJS Directive

What is the best way to delete the material-dashboard-react text from the starting route in a material ui admin panel?

Incorporating jquery.prettyPhoto results in the script being displayed on the webpage

Currently seeking user coordinates for Vue implementation