Function load

spz.js:66–141

(url)

async function load(url) {
    let pointer = null;

    const instance = await SpzSingleton.getInstance();
    console.log('spz.js: load(): Wasm instance loaded:', instance);

    try {
        // download byte array from url created in main thread
        const response = await fetch(url);
        if (!response.ok) {
          throw new Error(`spz.js: load(): Failed to fetch data: ${response.status}`);
        }
        URL.revokeObjectURL(url);
        const buffer = await response.arrayBuffer();
        const spzData = new Uint8Array(buffer);
        console.log('spz.js: load(): spzData.length=', spzData.length);

        // let wasm allocate memory for spzData
        pointer = instance._malloc(Uint8Array.BYTES_PER_ELEMENT * spzData.length);
        if (pointer === null) {
            throw new Error("spz.js: load(): couldn't allocate memory");
        }
        instance.HEAPU8.set(spzData, pointer / Uint8Array.BYTES_PER_ELEMENT);

        // generate raw gaussian cloud from spzData
        const rawGsCloud = instance.load_spz(pointer, spzData.length);
        console.log('spz.js: load(): rawGsCloud.numPoints=', rawGsCloud.numPoints);
        //console.log('spz.js: load(): rawGsCloud.shDegree=', rawGsCloud.shDegree);
        //console.log('spz.js: load(): rawGsCloud.antialiased=', rawGsCloud.antialiased);

        let options = null;
        const gaussianCloud = createGaussianCloudFromRaw(instance, rawGsCloud, options);
        disposeRawGSCloud(instance, rawGsCloud);
        console.log('spz.js: load(): gaussianCloud.numPoints=', gaussianCloud.numPoints);
        //console.log('spz.js: load(): gaussianCloud.shDegree=', gaussianCloud.shDegree);
        //console.log('spz.js: load(): gaussianCloud.antialiased=', gaussianCloud.antialiased);
        //console.log('spz.js: load(): gaussianCloud.positions.length=', gaussianCloud.positions.length);
        //console.log('spz.js: load(): gaussianCloud.scales.length=', gaussianCloud.scales.length);
        //console.log('spz.js: load(): gaussianCloud.rotations.length=', gaussianCloud.rotations.length);
        //console.log('spz.js: load(): gaussianCloud.alphas.length=', gaussianCloud.alphas.length);
        //console.log('spz.js: load(): gaussianCloud.colors.length=', gaussianCloud.colors.length);
        //console.log('spz.js: load(): gaussianCloud.sh.length=', gaussianCloud.sh.length);

        // Using transferable objects to avoid data copies
        self.postMessage({
            status: 'loaded',
            gaussianCloud: {
                numPoints: gaussianCloud.numPoints,
                shDegree: gaussianCloud.shDegree,
                antialiased: gaussianCloud.antialiased,
                positions: gaussianCloud.positions.buffer,
                scales: gaussianCloud.scales.buffer,
                rotations: gaussianCloud.rotations.buffer,
                alphas: gaussianCloud.alphas.buffer,
                colors: gaussianCloud.colors.buffer,
                sh: gaussianCloud.sh.buffer,
            }
        }, [