Function rebuildTwoIndexSegment

src/core/objects/boolean_tool.cpp:1097–1164

}

void rebuildTwoIndexSegment(
        ClipperLib::Path::size_type start_index,
        ClipperLib::Path::size_type end_index,
        bool sequence_increasing,
        const ClipperLib::Path& polygon,
        const PolyMap& polymap,
        PathObject* object)
{
	Q_UNUSED(sequence_increasing); // only used in Q_ASSERT.
	
	PathCoordInfo start_info = polymap.value(polygon.at(start_index));
	PathCoordInfo end_info = polymap.value(polygon.at(end_index));
	const PathObject* original = end_info.first->path;
	
	bool coords_increasing;
	bool is_curve;
	int coord_index;
	if (start_info.second->index == end_info.second->index)
	{
		coord_index = end_info.second->index;
		bool found = checkSegmentMatch(original, coord_index, polygon, start_index, end_index, coords_increasing, is_curve);
		if (!found)
		{
			object->getCoordinateRef(object->getCoordinateCount() - 1).setCurveStart(false);
			rebuildCoordinate(end_index, polygon, polymap, object);
			return;
		}
		Q_ASSERT(coords_increasing == sequence_increasing);
	}
	else
	{
		coord_index = end_info.second->index;
		bool found = checkSegmentMatch(original, coord_index, polygon, start_index, end_index, coords_increasing, is_curve);
		if (!found)
		{
			coord_index = start_info.second->index;
			found = checkSegmentMatch(original, coord_index, polygon, start_index, end_index, coords_increasing, is_curve);
			if (!found)
			{
				object->getCoordinateRef(object->getCoordinateCount() - 1).setCurveStart(false);
				rebuildCoordinate(end_index, polygon, polymap, object);
				return;
			}
		}
	}
	
	if (!is_curve)
		object->getCoordinateRef(object->getCoordinateCount() - 1).setCurveStart(false);
	
	if (coords_increasing)
	{
		object->addCoordinate(resetCoordinate(original->getCoordinate(coord_index + 1)));
		if (is_curve)
		{
			object->addCoordinate(original->getCoordinate(coord_index + 2));
			object->addCoordinate(resetCoordinate(original->getCoordinate(coord_index + 3)));
		}
	}