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/******************************************************************************
* Copyright (c) 1999, Carl Anderson
*
* This code is based in part on the earlier work of Frank Warmerdam
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
******************************************************************************
* shpgeo.h
*
* support for geometric and other additions to shapelib
*/
/* I'm using some shorthand throughout this file
* R+ is a Clockwise Ring and is the positive portion of an object
* R- is a CounterClockwise Ring and is a hole in a R+
* A complex object is one having at least one R-
* A compound object is one having more than one R+
* A simple object has one and only one element (R+ or R-)
*
* The closed ring constraint is for polygons and assumed here
* Arcs or LineStrings I am calling Rings (generically open or closed)
* Point types are vertices or lists of vertices but not Rings
*
* SHPT_POLYGON, SHPT_POLYGONZ, SHPT_POLYGONM and SHPT_MULTIPATCH
* can have SHPObjects that are compound as well as complex
*
* SHP_POINT and its Z and M derivatives are strictly simple
* MULTI_POINT, SHPT_ARC and their derivatives may be simple or compound
*
*/
#ifndef SHPGEO_H
#define SHPGEO_H
#ifdef __cplusplus
extern "C"
{
#endif
#define SHPD_POINT 1
#define SHPD_LINE 2
#define SHPD_AREA 4
#define SHPD_Z 8
#define SHPD_MEASURE 16
/* move these into a ogis header file ogis.h */
#define OGIST_UNKNOWN 0
#define OGIST_POINT 1
#define OGIST_LINESTRING 2
#define OGIST_POLYGON 3
#define OGIST_MULTIPOINT 4
#define OGIST_MULTILINE 5
#define OGIST_MULTIPOLYGON 6
#define OGIST_GEOMCOLL 7
typedef struct
{
int StreamPos;
int NeedSwap;
char *wStream;
} WKBStreamObj;
typedef struct
{
double x;
double y;
} PT;
typedef struct
{
int cParts;
SHPObject *SHPObj;
} SHPObjectList;
#define LSB_ORDER (int)1
extern char *asFileName(const char *fil, const char *ext);
extern int SHPDimension(int SHPType);
extern double SHPArea_2d(const SHPObject *psCShape);
extern int SHPRingDir_2d(const SHPObject *psCShape, int Ring);
extern double SHPLength_2d(const SHPObject *psCShape);
extern PT SHPCentrd_2d(const SHPObject *psCShape);
extern PT SHPPointinPoly_2d(const SHPObject *psCShape);
extern PT *SHPPointsinPoly_2d(const SHPObject *psCShape);
extern int RingCentroid_2d(int nVertices, const double *a, const double *b,
PT *C, double *Area);
extern double RingLength_2d(int nVertices, const double *a,
const double *b);
extern double RingArea_2d(int nVertices, const double *a, const double *b);
extern SHPObject *SHPClone(const SHPObject *psCShape, int lowPart,
int highPart);
extern SHPObject *SHPUnCompound(const SHPObject *psCShape, int *ringNumber);
extern SHPObject *SHPIntersect_2d(const SHPObject *a, const SHPObject *b);
extern int SHPWriteOGisWKB(WKBStreamObj *stream_obj,
const SHPObject *psCShape);
extern SHPObject *SHPReadOGisWKB(WKBStreamObj *stream_obj);
int SHPWriteOGisPolygon(WKBStreamObj *stream_obj,
const SHPObject *psCShape);
int SHPWriteOGisLine(WKBStreamObj *stream_obj, const SHPObject *psCShape);
int SHPWriteOGisPoint(WKBStreamObj *stream_obj, const SHPObject *psCShape);
SHPObject *SHPReadOGisPolygon(WKBStreamObj *stream_obj);
SHPObject *SHPReadOGisLine(WKBStreamObj *stream_obj);
SHPObject *SHPReadOGisPoint(WKBStreamObj *stream_obj);
extern int SHPClean(SHPObject *psCShape);
extern int SHPOGisType(int GeomType, int toOGis);
void swapD(void *so, const unsigned char *in, long bytes);
void swapW(void *so, const unsigned char *in, long bytes);
void SwapG(void *so, const void *in, int this_cnt, int this_size);
#ifdef __cplusplus
}
#endif
#endif /* ndef SHPGEO_H */
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