Extend STLLoaderPlugin to load via optional, custom data source object

[xeolabs]

Solution

Example usage:

• [Run this example]

 class MyDataSource {
     getSTL(src, ok, error) {
         const request = new XMLHttpRequest();
         request.overrideMimeType("application/json");
         request.open('GET', src, true);
         request.responseType = 'arraybuffer';
         request.onreadystatechange = function () {
             if (request.readyState === 4) {
                 if (request.status === 200) {
                     ok(request.response);
                 } else {
                     error(request.statusText);
                 }
             }
         };
         request.send(null);
    }
}

const stlLoader = new STLLoaderPlugin(viewer, {
    dataSource: new MyDataSource()
});

const model = stlLoader.load({
    id: "myModel",
    src: "./models/stl/binary/spurGear.stl",
    smoothNormals: true
});