}
// 用自己的折点将线串打断
CoordSeqEditor tLine = new CoordSeqEditor(l1.getPoints());
for (int i = 0, n = r2.size(); i < n; i++) {
CPoint p = r2.getPoint(i);
tLine.tryInsertPoint(p);
}
// 片段在里面
for (int i = 0, n = tLine.size() - 1; i < n; i++) {
LineSegment lseg = tLine.getLineSegment(i);
CPoint mp = lseg.getMiddlePoint();