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/*
 * Copyright (c) 2019 Martin Davis.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * and Eclipse Distribution License v. 1.0 which accompanies this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v20.html
 * and the Eclipse Distribution License is available at
 *
 * http://www.eclipse.org/org/documents/edl-v10.php.
 */
package com.hazelcast.shaded.org.locationtech.jts.noding;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import com.hazelcast.shaded.org.locationtech.jts.geom.Coordinate;

/**
 * A noder which extracts all line segments 
 * as {@link SegmentString}s.
 * This enables fast overlay of geometries which are known to be already fully noded.
 * In particular, it provides fast union of polygonal and linear coverages.
 * Unioning a noded set of lines is an effective way 
 * to perform line merging and line dissolving.
 * 

* No precision reduction is carried out. * If that is required, another noder must be used (such as a snap-rounding noder), * or the input must be precision-reduced beforehand. * * @author Martin Davis * */ public class SegmentExtractingNoder implements Noder { private List segList; /** * Creates a new segment-extracting noder. */ public SegmentExtractingNoder() { } @Override public void computeNodes(Collection segStrings) { segList = extractSegments(segStrings); } private static List extractSegments(Collection segStrings) { List segList = new ArrayList(); for (SegmentString ss : segStrings) { extractSegments( ss, segList ); } return segList; } private static void extractSegments(SegmentString ss, List segList) { for (int i = 0; i < ss.size() - 1; i++) { Coordinate p0 = ss.getCoordinate(i); Coordinate p1 = ss.getCoordinate(i + 1); SegmentString seg = new BasicSegmentString(new Coordinate[] { p0, p1 }, ss.getData()); segList.add(seg); } } @Override public Collection getNodedSubstrings() { return segList; } }





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