/**
* Tests whether this PreparedPolygon intersects a given geometry.
*
* @param geom the test geometry
* @return true if the test geometry intersects
*/
public boolean intersects(Geometry geom) {
/**
* Do point-in-poly tests first, since they are cheaper and may result in a quick positive
* result.
*
* <p>If a point of any test components lie in target, result is true
*/
boolean isInPrepGeomArea = isAnyTestComponentInTarget(geom);
if (isInPrepGeomArea) return true;
/** If any segments intersect, result is true */
List lineSegStr = SegmentStringUtil.extractSegmentStrings(geom);
// only request intersection finder if there are segments (ie NOT for point inputs)
if (lineSegStr.size() > 0) {
boolean segsIntersect = prepPoly.getIntersectionFinder().intersects(lineSegStr);
if (segsIntersect) return true;
}
/**
* If the test has dimension = 2 as well, it is necessary to test for proper inclusion of the
* target. Since no segments intersect, it is sufficient to test representative points.
*/
if (geom.getDimension() == 2) {
// TODO: generalize this to handle GeometryCollections
boolean isPrepGeomInArea =
isAnyTargetComponentInAreaTest(geom, prepPoly.getRepresentativePoints());
if (isPrepGeomInArea) return true;
}
return false;
}
private void findAndClassifyIntersections(Geometry geom) {
List lineSegStr = SegmentStringUtil.extractSegmentStrings(geom);
LineIntersector li = new RobustLineIntersector();
SegmentIntersectionDetector intDetector = new SegmentIntersectionDetector(li);
intDetector.setFindAllIntersectionTypes(true);
prepPoly.getIntersectionFinder().intersects(lineSegStr, intDetector);
hasSegmentIntersection = intDetector.hasIntersection();
hasProperIntersection = intDetector.hasProperIntersection();
hasNonProperIntersection = intDetector.hasNonProperIntersection();
}
/**
* Tests whether this geometry intersects a given geometry.
*
* @param geom the test geometry
* @return true if the test geometry intersects
*/
public boolean intersects(Geometry geom) {
/** If any segments intersect, obviously intersects = true */
List lineSegStr = SegmentStringUtil.extractSegmentStrings(geom);
boolean segsIntersect = prepLine.getIntersectionFinder().intersects(lineSegStr);
// MD - performance testing
// boolean segsIntersect = false;
if (segsIntersect) return true;
/** For L/L case we are done */
if (geom.getDimension() == 1) return false;
/** For L/A case, need to check for proper inclusion of the target in the test */
if (geom.getDimension() == 2 && prepLine.isAnyTargetComponentInTest(geom)) return true;
/** For L/P case, need to check if any points lie on line(s) */
if (geom.getDimension() == 0) return isAnyTestPointInTarget(geom);
// return prepLine.getGeometry().intersects(geom);
return false;
}
