public Vector2D getCentroid()

in commons-geometry-euclidean/src/main/java/org/apache/commons/geometry/euclidean/twod/ConvexArea.java [148:181]

• 24 lines of code
• 4 McCabe index (conditional complexity)

    public Vector2D getCentroid() {
        final List<LineConvexSubset> boundaries = getBoundaries();

        double quadrilateralAreaSum = 0.0;
        double scaledSumX = 0.0;
        double scaledSumY = 0.0;

        double signedArea;
        Vector2D startPoint;
        Vector2D endPoint;

        for (final LineConvexSubset seg : boundaries) {
            if (seg.isInfinite()) {
                // infinite => no centroid
                return null;
            }

            startPoint = seg.getStartPoint();
            endPoint = seg.getEndPoint();

            signedArea = startPoint.signedArea(endPoint);

            quadrilateralAreaSum += signedArea;

            scaledSumX += signedArea * (startPoint.getX() + endPoint.getX());
            scaledSumY += signedArea * (startPoint.getY() + endPoint.getY());
        }

        if (quadrilateralAreaSum > 0) {
            return Vector2D.of(scaledSumX, scaledSumY).multiply(1.0 / (3.0 * quadrilateralAreaSum));
        }

        return null;
    }