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77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/**********************************************************************
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* $Id:$
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*
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* PostGIS - Spatial Types for PostgreSQL
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* http://postgis.refractions.net
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* Copyright 2010 Olivier Courtin <olivier.courtin@oslandia.com>
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*
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* This is free software; you can redistribute and/or modify it under
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* the terms of the GNU General Public Licence. See the COPYING file.
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*
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**********************************************************************/
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#ifndef _LIBTGEOM_H
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#define _LIBTGEOM_H 1
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#include <stdint.h>
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/**
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* TSERIALIZED (mostly inspired by GSERIALIZED struct)
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*/
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typedef struct
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{
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uint32_t size; /* For PgSQL use only, use VAR* macros to manipulate. */
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uint32_t srid; /* SRID */
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uint8_t flags; /* HasZ, HasM, HasBBox, IsGeodetic, IsReadOnly, IsSolid */
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uint8_t *data; /* See tserialized.txt */
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} TSERIALIZED;
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typedef struct
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{
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POINT4D *s; /* Edge starting point */
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POINT4D *e; /* Edge ending point */
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int count; /* Count how many time this edge is used in the TGEOM.
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Caution: We don't care about edge orientation ! */
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} TEDGE;
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typedef struct
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{
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uint32_t nedges;
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uint32_t maxedges;
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int32_t *edges; /* Array of edge index, a negative value
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means that the edge is reversed */
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int32_t nrings;
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POINTARRAY **rings; /* Internal rings array */
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} TFACE;
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typedef struct
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{
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uint8_t type;
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uint8_t flags;
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uint32_t srid; /* 0 == unknown */
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BOX3D *bbox; /* NULL == unneeded */
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uint32_t nedges;
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uint32_t maxedges;
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TEDGE **edges;
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uint32_t nfaces;
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uint32_t maxfaces;
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TFACE **faces;
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} TGEOM;
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extern TGEOM* tgeom_new(uint8_t type, int hasz, int hasm);
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extern void tgeom_free(TGEOM *tgeom);
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extern TSERIALIZED* tserialized_from_lwgeom(LWGEOM *lwgeom);
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extern TGEOM* tgeom_from_lwgeom(const LWGEOM *lwgeom);
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extern LWGEOM* lwgeom_from_tserialized(TSERIALIZED *t);
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extern LWGEOM* lwgeom_from_tgeom(TGEOM *tgeom);
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extern int lwgeom_is_solid(LWGEOM *lwgeom);
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TSERIALIZED * tgeom_serialize(const TGEOM *tgeom);
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TGEOM * tgeom_deserialize(TSERIALIZED *serialized_form);
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double tgeom_perimeter2d(TGEOM* tgeom);
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double tgeom_perimeter(TGEOM* tgeom);
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extern void printTGEOM(TGEOM *tgeom);
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#endif /* !defined _LIBTGEOM_H */
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