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#ifndef __PGS_POLYGON_H__
#define __PGS_POLYGON_H__
#include "ellipse.h"
/* Polygon declarations */
/*
* The definition of spherical polygon using a list of
* spherical points.
*/
typedef struct
{
char vl_len_[4]; /* total size in bytes */
int32 npts; /* count of points */
SPoint p[1]; /* variable length array of SPoints */
} SPOLY;
/* Polygon and ellipse */
#define PGS_ELLIPSE_POLY_AVOID 0 /* ellipse avoids polygon */
#define PGS_POLY_CONT_ELLIPSE 1 /* polygon contains ellipse */
#define PGS_ELLIPSE_CONT_POLY 2 /* ellipse contains polygon */
#define PGS_ELLIPSE_POLY_OVER 3 /* ellipse overlaps polygon */
/* Polygon and circle */
#define PGS_CIRCLE_POLY_AVOID 0 /* circle avoids polygon */
#define PGS_POLY_CONT_CIRCLE 1 /* polygon contains circle */
#define PGS_CIRCLE_CONT_POLY 2 /* circle contains polygon */
#define PGS_CIRCLE_POLY_OVER 3 /* circle overlap polygon */
/* Polygon and line */
#define PGS_LINE_POLY_AVOID 0 /* line avoids polygon */
#define PGS_POLY_CONT_LINE 1 /* polygon contains line */
#define PGS_LINE_POLY_OVER 2 /* line overlap polygon */
/* Polygon and polygon */
#define PGS_POLY_AVOID 0 /* polygon avoids other polygon */
#define PGS_POLY_CONT 1 /* polygon contains other polygon */
#define PGS_POLY_OVER 2 /* polygons overlap */
#define PG_GETARG_SPOLY( arg ) \
( (SPOLY *) DatumGetPointer(PG_DETOAST_DATUM(PG_GETARG_DATUM(arg))) )
/*
* Checks whether two polygons are equal.
*
* p1 - pointer to the first polygon
* p2 - pointer to the second polygon
*
* If 'dir' is true, check with reverse polygon of 'p2'.
*/
bool spoly_eq(const SPOLY *p1, const SPOLY *p2, bool dir);
/*
* Returns the i-th line segment of a polygon.
*
* sl - pointer to the line segment
* poly - pointer to the polygon
* i - number of the segment
*/
bool spoly_segment(SLine *sl, const SPOLY *poly, int32 i);
/*
* Checks whether a polygon contains a point.
*
* pg - pointer to the polygon
* sp - pointer to the point
*/
bool spoly_contains_point(const SPOLY *pg, const SPoint *sp);
/*
* Returns the relationship between a polygon and a line as
* PGS_LINE_POLY_REL int8 value.
*
* poly - pointer to the polygon
* line - pointer to the line
*/
int8 poly_line_pos(const SPOLY *poly, const SLine *line);
/*
* Input of a spherical polygon.
*/
Datum spherepoly_in(PG_FUNCTION_ARGS);
/*
* Checks whether two polygons are equal.
*/
Datum spherepoly_equal(PG_FUNCTION_ARGS);
/*
* Checks whether two polygons are not equal.
*/
Datum spherepoly_equal_neg(PG_FUNCTION_ARGS);
/*
* Circumstance of a polygon. Returns circumference in radians
* (float8 datum).
*/
Datum spherepoly_circ(PG_FUNCTION_ARGS);
/*
* Count points (edges) of a polygon.
*/
Datum spherepoly_npts(PG_FUNCTION_ARGS);
/*
* Returns area of a polygon.
*/
Datum spherepoly_area(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon contains a point.
*/
Datum spherepoly_cont_point(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon doesn't contain a point.
*/
Datum spherepoly_cont_point_neg(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon contains a point.
*/
Datum spherepoly_cont_point_com(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon doesn't contain a point.
*/
Datum spherepoly_cont_point_com_neg(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon contains a circle.
*/
Datum spherepoly_cont_circle(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon doesn't contain a circle.
*/
Datum spherepoly_cont_circle_neg(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon contains a circle.
*/
Datum spherepoly_cont_circle_com(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon doesn't contain a circle.
*/
Datum spherepoly_cont_circle_com_neg(PG_FUNCTION_ARGS);
/*
* Checks whether a circle contains a polygon.
*/
Datum spherecircle_cont_poly(PG_FUNCTION_ARGS);
/*
* Checks whether a circle doesn't contain a polygon.
*/
Datum spherecircle_cont_poly_neg(PG_FUNCTION_ARGS);
/*
* Checks whether a circle contains a polygon.
*/
Datum spherecircle_cont_poly_com(PG_FUNCTION_ARGS);
/*
* Checks whether a circle doesn't contain a polygon.
*/
Datum spherecircle_cont_poly_com_neg(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon and a circle overlap.
*/
Datum spherepoly_overlap_circle(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon and a circle don't overlap.
*/
Datum spherepoly_overlap_circle_neg(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon and a circle overlap.
*/
Datum spherepoly_overlap_circle_com(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon and a circle don't overlap.
*/
Datum spherepoly_overlap_circle_com_neg(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon contains a line.
*/
Datum spherepoly_cont_line(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon doesn't contain a line.
*/
Datum spherepoly_cont_line_neg(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon contains a line.
*/
Datum spherepoly_cont_line_com(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon doesn't contain a line.
*/
Datum spherepoly_cont_line_com_neg(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon and a line overlap.
*/
Datum spherepoly_overlap_line(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon and a line don't overlap.
*/
Datum spherepoly_overlap_line_neg(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon and a line overlap.
*/
Datum spherepoly_overlap_line_com(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon and a line don't overlap.
*/
Datum spherepoly_overlap_line_com_neg(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon contains other polygon.
*/
Datum spherepoly_cont_poly(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon doesn't contain other polygon.
*/
Datum spherepoly_cont_poly_neg(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon contains other polygon.
*/
Datum spherepoly_cont_poly_com(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon doesn't contain other polygon.
*/
Datum spherepoly_cont_poly_com_neg(PG_FUNCTION_ARGS);
/*
* Checks whether two polygons overlap.
*/
Datum spherepoly_overlap_poly(PG_FUNCTION_ARGS);
/*
* Checks whether two polygons don't overlap.
*/
Datum spherepoly_overlap_poly_neg(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon contains an ellipse.
*/
Datum spherepoly_cont_ellipse(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon doesn't contain an ellipse.
*/
Datum spherepoly_cont_ellipse_neg(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon contains an ellipse.
*/
Datum spherepoly_cont_ellipse_com(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon doesn't contain an ellipse.
*/
Datum spherepoly_cont_ellipse_com_neg(PG_FUNCTION_ARGS);
/*
* Checks whether an ellipse contains a polygon.
*/
Datum sphereellipse_cont_poly(PG_FUNCTION_ARGS);
/*
* Checks whether an ellipse doesn't contain a polygon.
*/
Datum sphereellipse_cont_poly_neg(PG_FUNCTION_ARGS);
/*
* Checks whether an ellipse contains a polygon.
*/
Datum sphereellipse_cont_poly_com(PG_FUNCTION_ARGS);
/*
* Checks whether an ellipse doesn't contain a polygon.
*/
Datum sphereellipse_cont_poly_com_neg(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon and an ellipse overlap.
*/
Datum spherepoly_overlap_ellipse(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon and an ellipse don't overlap.
*/
Datum spherepoly_overlap_ellipse_neg(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon and an ellipse overlap.
*/
Datum spherepoly_overlap_ellipse_com(PG_FUNCTION_ARGS);
/*
* Checks whether a polygon and an ellipse don't overlap.
*/
Datum spherepoly_overlap_ellipse_com_neg(PG_FUNCTION_ARGS);
/*
* Performs inverse transform on a polygon using an Euler transformation.
*/
Datum spheretrans_poly(PG_FUNCTION_ARGS);
/*
* Performs inverse transform on a polygon using an Euler transformation.
*/
Datum spheretrans_poly_inverse(PG_FUNCTION_ARGS);
/*
* State transition function for the aggregate function spoly(spoint). Never
* call this function outside an aggregate function! Adds a point to a polygon.
*/
Datum spherepoly_add_point(PG_FUNCTION_ARGS);
/*
* Finalize function for adding spoints to a polygon.
*/
Datum spherepoly_add_points_finalize(PG_FUNCTION_ARGS);
#endif
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