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geoobj.h

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/* geoobj.h -- A generic spatial object type for FMaps 
 *
 * Copyright (c) 2000 Eric G. Miller <egm2@jps.net>
 *                    Franck Martin <franck@sopac.org>
 * 
 * This Program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This Program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this Program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/*
 * Modified by the FMaps Team and others 2000.  See the AUTHORS
 * file for a list of people on the FMaps Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * FMaps at http://FMaps.sourceforge.net/.
 */
#define _GNU_SOURCE

#ifdef __cplusplus
extern "C" {
#endif

  /* Define our datatypes (follows OpenGIS data types)
   * FM_POINT               = "POINT (x y z)"
   * FM_LINESTRING          = "LINESTRING (x y z,... x y z)"
   * FM_POLYGON             = "POLYGON ((x y z, x y z,... x y z),..(x y z, x y z,... x y z)" 
   * FM_MULTIPOINT          = "MULTIPOINT (x y z,... x y z)" 
   * FM_MULTILINESTRING     = "MULTILINESTRING ((x y z, x y z,... x y z),..(x y z, x y z,... x y z)"
   * FM_MULTIPOLYGON        = "MULTIPOLYGON ((x y z, x y z,... x y z),..(x y z, x y z,... x y z)"
   * FM_GEOMETRYCOLLECTION  = "GEOMETRYCOLLECTION (POINT (x y z), POINT (x y z), LINESTRING (x y z,... x y z))" 
   */
  /* Define extended datatypes 
   * FM_BOX                 = "BOX (minx miny minz, maxx maxy maxz)"
   */

#define FM_POINT              1
#define FM_LINESTRING         2
#define FM_POLYGON            3
#define FM_MULTIPOINT         4
#define FM_MULTILINESTRING    5
#define FM_MULTIPOLYGON       6
#define FM_GEOMETRYCOLLECTION 7
/* FMaps extensions to OpenGIS */
#define FM_BOX                101

  /* Define our data structures */
  
  typedef struct {
    int32     size;         /* the size of the structure      */
    int8      byte_order;   /* The order of data LSB or MSB   */
    uint      wkbtype;      /* Our datatype flag              */
    double    minx;         /* Bounding Box Coordinates       */
    double    miny;
    double    minz;
    double    maxx;
    double    maxy;
    double    maxz;
    char      data[1];      /* The resizable character string */
  } GeoObj;

  typedef struct {
    double    x,y,z;        /* long/lat/height or northing/easting/height   */
  } Point;

  typedef struct {
    uint32    numPoints;
    Point     points[1];      /* basic structure for points  */
  } LinearRing;

  enum wkbGeometryType {
    wkbPoint              = FM_POINT,
    wkbLineString         = FM_LINESTRING,
    wkbPolygon            = FM_POLYGON,
    wkbMultiPoint         = FM_MULTIPOINT,
    wkbMultiLineString    = FM_MULTILINESTRING,
    wkbMultiPolygon       = FM_MULTIPOLYGON,
    wkbGeometryCollection = FM_GEOMETRYCOLLECTION,
    wkbBox                = FM_BOX
  };
  
  enum wkbByteOrder {
    wkbXDR = 0,         /* Big Endian     */
    wkbNDR = 1          /* Little Endina  */
  };

  typedef struct {
    int8        byteOrder;
    uint32      wkbType;
    Point       point;
  } WKBPoint;    

  typedef struct {
    int8        byteOrder;
    uint32      wkbType;
    uint32      numPoints;
    Point       points[1];
  } WKBLineString; 

  typedef struct {
    int8        byteOrder;
    uint32      wkbType;
    uint32      numRings;
    LinearRing  rings[1];
  } WKBPolygon; 

  typedef struct {
    int8        byteOrder;
    uint32      wkbType;
    uint32      num_wkbPoints;
    WKBPoint    *wkbPoints;
  } WKBMultiPoint;
  
  typedef struct {
    int8        byteOrder;
    uint32      wkbType;
    uint32      num_wkbLineStrings;
    WKBLineString    *wkbLineStrings;
  } WKBMultiLineString;

  typedef struct {
    int8        byteOrder;
    uint32      wkbType;
    uint32      num_wkbPolygons;
    WKBPolygon  *wkbPolygons;
  } WKBMultiPolygon;  
  
  typedef struct {
    int8        byteOrder;
    uint32      wkbType;
    double      x[6];
  } WKBBox;
  
  typedef struct _WKBGeometryCollection WKBGeometryCollection;

  typedef union {
    WKBPoint              point;
    WKBLineString         linestring;
    WKBPolygon            polygon;
/*    WKBGeometryCollection collection; */
    WKBMultiPoint         mpoint;
    WKBMultiLineString    mlinestring;
    WKBMultiPolygon       mpolygon;
    WKBBox                box;
  } WKBGeometry;
  
/*  struct _WKBGeometryCollection {
    int8        byte_order;
    uint32      wkbType;
    uint32      num_wkbGeometries;
    WKBGeometry *wkbGeometries;
  };
*/  
  



#ifdef __cplusplus
};
#endif

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