org.locationtech.jts.noding.OrientedCoordinateArray Maven / Gradle / Ivy

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/*
 * Copyright (c) 2016 Vivid Solutions.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v. 1.0 which accompanies this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 *
 * http://www.eclipse.org/org/documents/edl-v10.php.
 */
package org.locationtech.jts.noding;

import org.locationtech.jts.geom.Coordinate;
import org.locationtech.jts.geom.CoordinateArrays;

/**
 * Allows comparing {@link Coordinate} arrays
 * in an orientation-independent way.
 *
 * @author Martin Davis
 * @version 1.7
 */
public class OrientedCoordinateArray
    implements Comparable
{
  private Coordinate[] pts;
  private boolean orientation;

  /**
   * Creates a new {@link OrientedCoordinateArray}
   * for the given {@link Coordinate} array.
   *
   * @param pts the coordinates to orient
   */
  public OrientedCoordinateArray(Coordinate[] pts)
  {
    this.pts = pts;
    orientation = orientation(pts);
  }

  /**
   * Computes the canonical orientation for a coordinate array.
   *
   * @param pts the array to test
   * @return true if the points are oriented forwards
   * or false