rpi-sk6812-native/lib/index-mapping/mirror-matrix-x.js

(raspberry-pi *only*) native bindings to control a strip of WS281x or SK6812 LEDs with node.js

module.exports = function(rows, cols) {
    var map = new Uint16Array(rows*cols);

    for(var x=0; x<cols; x++) {
        for(var y=0; y<rows; y++) {
            map[cols*y + x] = cols*y + rows-x-1;
        }
    }

    return map;
};