Function _set

docs/app/js/sanddance-app.js:138689–138691

(index, mask)

function Bitmap(w, h) {
    const array = new Uint32Array(~~((w * h + SIZE) / SIZE));
    function _set(index, mask) {
        array[index] |= mask;
    }
    function _clear(index, mask) {
        array[index] &= mask;
    }