Split splitOnIntersection()

in commons-geometry-euclidean/src/main/java/org/apache/commons/geometry/euclidean/twod/Segment.java [183:210]

• 18 lines of code
• 9 McCabe index (conditional complexity)

    Split<LineConvexSubset> splitOnIntersection(final Line splitter, final Vector2D intersection) {
        final Line line = getLine();

        final Precision.DoubleEquivalence splitterPrecision = splitter.getPrecision();

        final int startCmp = splitterPrecision.compare(splitter.offset(startPoint), 0.0);
        final int endCmp = splitterPrecision.compare(splitter.offset(endPoint), 0.0);

        if (startCmp == 0 && endCmp == 0) {
            // the entire segment is directly on the splitter line
            return new Split<>(null, null);
        } else if (startCmp < 1 && endCmp < 1) {
            // the entire segment is on the minus side
            return new Split<>(this, null);
        } else if (startCmp > -1 && endCmp > -1) {
            // the entire segment is on the plus side
            return new Split<>(null, this);
        }

        // we need to split the line
        final Segment startSegment = new Segment(line, startPoint, intersection);
        final Segment endSegment = new Segment(line, intersection, endPoint);

        final Segment minus = (startCmp > 0) ? endSegment : startSegment;
        final Segment plus = (startCmp > 0) ? startSegment : endSegment;

        return new Split<>(minus, plus);
    }