Load various file formats into a Three.js scene

Question

Load various file formats into a Three.js scene

I am working on a project where I need to create a function that can load a 3D object into ThreeJS. The user will upload the file onto our website, and it could be in various formats such as STL, JSON, Babylon, Collada, etc.

Currently, my code only supports loading one specific format, which is shown below:

// BEGIN Clara.io JSON loader code
var objectLoader = new THREE.ObjectLoader();
objectLoader.load('clara.json', function(obj) {
    object = new THREE.Mesh(obj);
    scene.add(object);
});

Is there a way in ThreeJS or any other method available that can automatically load the 3D object into the scene based on the uploaded file format?

javascript three.js

Answer 1

Answer №1

If you're looking to enhance your skills, I recommend checking out the source code for the three.js editor. It's important to ensure that you have all the necessary loaders included and create a comprehensive switch statement to select the appropriate loader based on the file extension.

https://i.sstatic.net/someUniqueLink.png

Answer 2

If you're looking to enhance your skills, I recommend checking out the source code for the three.js editor. It's important to ensure that you have all the necessary loaders included and create a comprehensive switch statement to select the appropriate loader based on the file extension.

https://i.sstatic.net/someUniqueLink.png

Answer 3

Answer №2

To determine the appropriate loader, it is best to utilize the file string -

Consider using a function like this:

loadArbitraryModel("path/to/file.json");

loadArbitraryModel = function(path) {
    var strings = path.split('.'); //now the path is ["path/to/file", "json"]
    var types = ['json', 'obj', 'stl', 'babylon', 'collada'];
    var result = -1;
    types.forEach(function (item,index) {
        if (strings.length > 1) {
            if (strings[1] == item){ //strings[1] represents anything after the '.'
                result = index;
            }
        }
    });
    switch (result){
        case -1:
            alert("file format not supported/ improperly named");
        case 0:
            loadJSON(path);
            break;
        case 1:
            loadOBJ(path);
            break;
        case 3:
            loadSTL(path);
            break;
            //ETC etc etc
    }
}

An alternative approach is to define loadXXX multiple times for each file type. Alternatively, consider a load(loader,path) function where you specify which loader to use. For instance, in the json case ->

load(new THREE.ObjectLoader(),path)

. The loaders typically have similar functionalities within the function load( __, __), eliminating redundant code across functions.

This method does not accommodate errors from incorrectly labeled extensions. However, you can address this by defining an onError function within the loadXXX() function to generate an alert if the loader encounters parsing issues.

Answer 4

To determine the appropriate loader, it is best to utilize the file string -

Consider using a function like this:

loadArbitraryModel("path/to/file.json");

loadArbitraryModel = function(path) {
    var strings = path.split('.'); //now the path is ["path/to/file", "json"]
    var types = ['json', 'obj', 'stl', 'babylon', 'collada'];
    var result = -1;
    types.forEach(function (item,index) {
        if (strings.length > 1) {
            if (strings[1] == item){ //strings[1] represents anything after the '.'
                result = index;
            }
        }
    });
    switch (result){
        case -1:
            alert("file format not supported/ improperly named");
        case 0:
            loadJSON(path);
            break;
        case 1:
            loadOBJ(path);
            break;
        case 3:
            loadSTL(path);
            break;
            //ETC etc etc
    }
}

An alternative approach is to define loadXXX multiple times for each file type. Alternatively, consider a load(loader,path) function where you specify which loader to use. For instance, in the json case ->

load(new THREE.ObjectLoader(),path)

. The loaders typically have similar functionalities within the function load( __, __), eliminating redundant code across functions.

This method does not accommodate errors from incorrectly labeled extensions. However, you can address this by defining an onError function within the loadXXX() function to generate an alert if the loader encounters parsing issues.

Load various file formats into a Three.js scene

Answer №1

Answer №2

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