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# Envelope.h

    00001 /**********************************************************************
    00002  * $Id: Envelope.h 1820 2006-09-06 16:54:23Z mloskot $
    00003  *
    00004  * GEOS - Geometry Engine Open Source
    00005  * http://geos.refractions.net
    00006  *
    00007  * Copyright (C) 2006 Refractions Research Inc.
    00008  *
    00009  * This is free software; you can redistribute and/or modify it under
    00010  * the terms of the GNU Lesser General Public Licence as published
    00011  * by the Free Software Foundation.
    00012  * See the COPYING file for more information.
    00013  *
    00014  **********************************************************************
    00015  *
    00016  * Last port: geom/Envelope.java rev. 1.41 (JTS-1.7)
    00017  *
    00018  **********************************************************************/
    00019
    00020 #ifndef GEOS_GEOM_ENVELOPE_H
    00021 #define GEOS_GEOM_ENVELOPE_H
    00022
    00023 #include <geos/inline.h>
    00024
    00025 #include <string>
    00026 #include <vector>
    00027 #include <memory>
    00028
    00029 namespace geos {
    00030 namespace geom { // geos::geom
    00031
    00032 class Coordinate;
    00033
    00051 class Envelope {
    00052
    00053 public:
    00054
    00055         typedef std::auto_ptr<Envelope> AutoPtr;
    00056
    00060         Envelope(void);
    00061
    00071         Envelope(double x1, double x2, double y1, double y2);
    00072
    00080         Envelope(const Coordinate& p1, const Coordinate& p2);
    00081
    00087         Envelope(const Coordinate& p);
    00088
    00090         Envelope(const Envelope &env);
    00091
    00093         Envelope& operator=(const Envelope& e);
    00094
    00099         Envelope(const std::string &str);
    00100
    00101         ~Envelope(void);
    00102
    00112         static bool intersects(const Coordinate& p1, const Coordinate& p2,
    00113                         const Coordinate& q);
    00114
    00126         static bool intersects(const Coordinate& p1, const Coordinate& p2,
    00127                         const Coordinate& q1, const Coordinate& q2);
    00128
    00132         void init(void);
    00133
    00143         void init(double x1, double x2, double y1, double y2);
    00144
    00152         void init(const Coordinate& p1, const Coordinate& p2);
    00153
    00160         void init(const Coordinate& p);
    00161
    00162         // use assignment operator instead
    00163         //void init(Envelope env);
    00164
    00169         void setToNull(void);
    00170
    00179         bool isNull(void) const;
    00180
    00186         double getWidth(void) const;
    00187
    00193         double getHeight(void) const;
    00194
    00199         double getMaxY() const;
    00200
    00205         double getMaxX() const;
    00206
    00211         double getMinY() const;
    00212
    00217         double getMinX() const;
    00218
    00227         bool centre(Coordinate& centre) const;
    00228
    00238         bool intersection(const Envelope& env, Envelope& result);
    00239
    00246         void translate(double transX, double transY);
    00247
    00257         void expandBy(double deltaX, double deltaY);
    00258
    00266         void expandBy(double distance) { expandBy(distance, distance); }
    00267
    00268
    00275         void expandToInclude(const Coordinate& p);
    00276
    00286         void expandToInclude(double x, double y);
    00287
    00295         void expandToInclude(const Envelope* other);
    00296
    00306         bool contains(const Coordinate& p) const;
    00307
    00323         bool contains(double x, double y) const;
    00324
    00337         bool contains(const Envelope* other) const;
    00338
    00339         bool contains(const Envelope& other) const { return contains(&other); }
    00340
    00348         bool intersects(const Coordinate& p) const;
    00349
    00358         bool intersects(double x, double y) const;
    00359
    00369         bool intersects(const Envelope* other) const;
    00370
    00371         bool intersects(const Envelope& other) const;
    00372
    00383         bool equals(const Envelope* other) const;
    00384
    00392         std::string toString(void) const;
    00393
    00401         double distance(const Envelope* env) const;
    00402
    00403         int hashCode() const;
    00404
    00405 private:
    00406
    00413         std::vector<std::string> split(const std::string &str,
    00414                         const std::string &delimiters = " ");
    00415
    00416         static double distance(double x0,double y0,double x1,double y1);
    00417
    00419         double minx;
    00420
    00422         double maxx;
    00423
    00425         double miny;
    00426
    00428         double maxy;
    00429 };
    00430
    00432 bool operator==(const Envelope& a, const Envelope& b);
    00433
    00434 } // namespace geos::geom
    00435 } // namespace geos
    00436
    00437 #ifdef GEOS_INLINE
    00438 # include "geos/geom/Envelope.inl"
    00439 #endif
    00440
    00441 #endif // ndef GEOS_GEOM_ENVELOPE_H
    00442
    00443 /**********************************************************************
    00444  * $Log$
    00445  * Revision 1.4  2006/04/10 18:15:09  strk
    00446  * Changed Geometry::envelope member to be of type auto_ptr<Envelope>.
    00447  * Changed computeEnvelopeInternal() signater to return auto_ptr<Envelope>
    00448  *
    00449  * Revision 1.3  2006/04/05 14:04:25  strk
    00450  * Fixed copy ctor to support "Null" Envelope copies.
    00451  * Drop init(Envelope&) method.
    00452  * Port info and various cleanups.
    00453  *
    00454  * Revision 1.2  2006/03/24 09:52:41  strk
    00455  * USE_INLINE => GEOS_INLINE
    00456  *
    00457  * Revision 1.1  2006/03/09 16:46:49  strk
    00458  * geos::geom namespace definition, first pass at headers split
    00459  *
    00460  **********************************************************************/