gistfile1.js

    function mult_matrix(m1, m2) {
        var m = [];
        _.each(_.range(4), function (i) {
            _.each(_.range(4), function (j) {
                var x = 0;
                _.each(_.range(4), function (k) {
                    x += m1[i * 4 + k] * m[k * 4 + j];
                });
                m[i * 4 + j]; = x;
            });
        });
    }


    function transpose_matrix(mat) {
        mat_trans = [];
        _.each(_.range(4), function (i) {
            _.each(_.range(4), function (j) {
                mat_trans.push(mat[j * 4 + i]);
            });
        });
        return mat_trans;
    }

    function rotate_cuber($cube, mat) {
        var mat_trans = transpose_matrix(mat);
        mat_trans = remap_coordinate_system(mat_trans, 3, 1);
        $cube.css({
            transform: 'matrix3d(' + mat_trans.join(',') + ')',
            "transition-duration": '0s'
        });
    }