I'm looking to develop an interactive online model viewer that allows users to easily upload and view models without having to manually edit the source code. Unfortunately, most browsers restrict access to file paths, but can still read file contents. How can I load and display a model (such as obj, ply, mtl) based on the file's contents?
If you're looking to accomplish this task, checking out the github three.js repository is a great place to start. Within the examples section, you'll find an obj loader available. This repository showcases demos with mtl, stl, collada, and more formats.
For more information, visit:
Within the repository, the examples folder contains a js folder hosting all the example loaders:
Explore here: https://github.com/mrdoob/three.js/tree/master/examples/js/loaders
If you're interested in customizing the internal three loader, each loader example includes a parse(text) method.
Recently discovered that the three.js online editor has this feature at @ .
Simply go to File -> Import.
Take advantage of the HTML5 filereader API to easily parse data from a file. Another option is to read the file into a data URL and load that instead of the regular URL.
Here is the HTML code for allowing users to load the model file:
<h1>Model File Reader</h1>
<div>
Select a model file:
<input type="file" id="fileInput">
</div>
For handling the onload event in JavaScript, use the following code:
window.onload = function() {
var fileInput = document.getElementById('fileInput');
fileInput.addEventListener('change', function(e) {
// File selection is complete, now you can read the file
var file = this.files[0];
// Set the file encoding
var encoding = 'ISO-8859-1';
// Create a file reader
var reader = new FileReader();
// Set the onload handler for the reader
reader.onload = function(e) {
var result = reader.result;
// Parse the data using the corresponding loader
loader.parse(result);
}
// Read the file as text using the reader
reader.readAsText(file, encoding);
});
}
For more information on the file reader class, you can check here.
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