Function centroidPointLine

docs/app/js/sanddance-app.js:133585–133591

(x, y)

    centroidPoint(x0 = x, y0 = y);
}
function centroidPointLine(x, y) {
    var dx = x - x0, dy = y - y0, z = (0, _mathJs.sqrt)(dx * dx + dy * dy);
    X1 += z * (x0 + x) / 2;
    Y1 += z * (y0 + y) / 2;
    Z1 += z;
    centroidPoint(x0 = x, y0 = y);
}
function centroidLineEnd() {
    centroidStream.point = centroidPoint;
}