protected boolean indexOfAfterCheck(Geometry linearGeom, Coordinate testPt) {
LocationIndexedLine indexedLine = new LocationIndexedLine(linearGeom);
// check locations are consecutive
LinearLocation loc1 = indexedLine.indexOf(testPt);
LinearLocation loc2 = indexedLine.indexOfAfter(testPt, loc1);
if (loc2.compareTo(loc1) <= 0) return false;
// check extracted points are the same as the input
Coordinate pt1 = indexedLine.extractPoint(loc1);
Coordinate pt2 = indexedLine.extractPoint(loc2);
if (!pt1.equals2D(testPt)) return false;
if (!pt2.equals2D(testPt)) return false;
return true;
}
protected Coordinate extractOffsetAt(
Geometry linearGeom, Coordinate testPt, double offsetDistance) {
LocationIndexedLine indexedLine = new LocationIndexedLine(linearGeom);
LinearLocation index = indexedLine.indexOf(testPt);
return indexedLine.extractPoint(index, offsetDistance);
}
