コード例 #1
0
  /**
   * This method is called by clients of the {@link SegmentIntersector} class to process
   * intersections for two segments of the {@link SegmentString}s being intersected. Note that some
   * clients (such as {@link MonotoneChain}s) may optimize away this call for segment pairs which
   * they have determined do not intersect (e.g. by an disjoint envelope test).
   */
  public void processIntersections(
      SegmentString e0, int segIndex0, SegmentString e1, int segIndex1) {
    // don't bother intersecting a segment with itself
    if (e0 == e1 && segIndex0 == segIndex1) return;

    Coordinate p00 = e0.getCoordinates()[segIndex0];
    Coordinate p01 = e0.getCoordinates()[segIndex0 + 1];
    Coordinate p10 = e1.getCoordinates()[segIndex1];
    Coordinate p11 = e1.getCoordinates()[segIndex1 + 1];

    li.computeIntersection(p00, p01, p10, p11);
    // if (li.hasIntersection() && li.isProper()) Debug.println(li);

    if (li.hasIntersection()) {
      if (li.isInteriorIntersection()) {
        for (int intIndex = 0; intIndex < li.getIntersectionNum(); intIndex++) {
          interiorIntersections.add(li.getIntersection(intIndex));
        }
        ((NodedSegmentString) e0).addIntersections(li, segIndex0, 0);
        ((NodedSegmentString) e1).addIntersections(li, segIndex1, 1);
      }
    }
  }
コード例 #2
0
  /**
   * This method is called by clients of the {@link SegmentIntersector} class to process
   * intersections for two segments of the {@link SegmentStrings} being intersected. Note that some
   * clients (such as {@link MonotoneChain}s) may optimize away this call for segment pairs which
   * they have determined do not intersect (e.g. by an disjoint envelope test).
   */
  public void processIntersections(
      SegmentString e0, int segIndex0, SegmentString e1, int segIndex1) {
    if (e0 == e1 && segIndex0 == segIndex1) return;
    numTests++;
    Coordinate p00 = e0.getCoordinates()[segIndex0];
    Coordinate p01 = e0.getCoordinates()[segIndex0 + 1];
    Coordinate p10 = e1.getCoordinates()[segIndex1];
    Coordinate p11 = e1.getCoordinates()[segIndex1 + 1];

    li.computeIntersection(p00, p01, p10, p11);
    // if (li.hasIntersection() && li.isProper()) Debug.println(li);
    if (li.hasIntersection()) {
      // intersectionFound = true;
      numIntersections++;
      if (li.isInteriorIntersection()) {
        numInteriorIntersections++;
        hasInterior = true;
        // System.out.println(li);
      }
      // if the segments are adjacent they have at least one trivial intersection,
      // the shared endpoint.  Don't bother adding it if it is the
      // only intersection.
      if (!isTrivialIntersection(e0, segIndex0, e1, segIndex1)) {
        hasIntersection = true;
        ((NodedSegmentString) e0).addIntersections(li, segIndex0, 0);
        ((NodedSegmentString) e1).addIntersections(li, segIndex1, 1);
        if (li.isProper()) {
          numProperIntersections++;
          // Debug.println(li.toString());  Debug.println(li.getIntersection(0));
          // properIntersectionPoint = (Coordinate) li.getIntersection(0).clone();
          hasProper = true;
          hasProperInterior = true;
        }
      }
    }
  }