/*------------------------------------------------------------------------- * * geo_decls.h-- * Declarations for various 2D constructs. * * * Copyright (c) 1994, Regents of the University of California * * $Id: geo_decls.h,v 1.1 1997/03/14 23:33:27 scrappy Exp $ * * NOTE * These routines do *not* use the float types from adt/. * * XXX These routines were not written by a numerical analyst. * *------------------------------------------------------------------------- */ #ifndef GEO_DECLS_H #define GEO_DECLS_H #include "access/attnum.h" /*#ifndef FmgrIncluded -- seems like always included. (it's FMgrIncluded) AY */ /*-------------------------------------------------------------------- * Useful floating point utilities and constants. *-------------------------------------------------------------------*/ #define EPSILON 1.0E-06 #define FPzero(A) (fabs(A) <= EPSILON) #define FPeq(A,B) (fabs((A) - (B)) <= EPSILON) #define FPlt(A,B) ((B) - (A) > EPSILON) #define FPle(A,B) ((A) - (B) <= EPSILON) #define FPgt(A,B) ((A) - (B) > EPSILON) #define FPge(A,B) ((B) - (A) <= EPSILON) #define HYPOT(A, B) sqrt((A) * (A) + (B) * (B)) /*-------------------------------------------------------------------- * Memory management. *-------------------------------------------------------------------*/ #define PALLOC(SIZE) palloc(SIZE) #define PFREE(P) pfree(P) #define PALLOCTYPE(TYPE) (TYPE *) PALLOC(sizeof(TYPE)) /*#endif !FmgrIncluded */ /*--------------------------------------------------------------------- * Point - (x,y) *-------------------------------------------------------------------*/ typedef struct { double x, y; } Point; /*--------------------------------------------------------------------- * LSEG - A straight line, specified by endpoints. *-------------------------------------------------------------------*/ typedef struct { Point p[2]; double m; /* precomputed to save time, not in tuple */ } LSEG; /*--------------------------------------------------------------------- * PATH - Specified by vertex points. *-------------------------------------------------------------------*/ typedef struct { int32 length; /* XXX varlena */ int32 npts; int32 closed; /* is this a closed polygon? */ int32 dummy; /* padding to make it double align */ Point p[1]; /* variable length array of POINTs */ } PATH; /*--------------------------------------------------------------------- * LINE - Specified by its general equation (Ax+By+C=0). * If there is a y-intercept, it is C, which * incidentally gives a freebie point on the line * (if B=0, then C is the x-intercept). * Slope m is precalculated to save time; if * the line is not vertical, m == A. *-------------------------------------------------------------------*/ typedef struct { double A, B, C; double m; } LINE; /*--------------------------------------------------------------------- * BOX - Specified by two corner points, which are * sorted to save calculation time later. *-------------------------------------------------------------------*/ typedef struct { double xh, yh, xl, yl; /* high and low coords */ } BOX; /*--------------------------------------------------------------------- * POLYGON - Specified by an array of doubles defining the points, * keeping the number of points and the bounding box for * speed purposes. *-------------------------------------------------------------------*/ typedef struct { int32 size; /* XXX varlena */ int32 npts; BOX boundbox; char pts[1]; } POLYGON; /* * in geo_ops.h */ extern BOX *box_in(char *str); extern char *box_out(BOX *box); extern BOX *box_construct(double x1, double x2, double y1, double y2); extern BOX *box_fill(BOX *result, double x1, double x2, double y1, double y2); extern BOX *box_copy(BOX *box); extern long box_same(BOX *box1, BOX *box2); extern long box_overlap(BOX *box1, BOX *box2); extern long box_overleft(BOX *box1, BOX *box2); extern long box_left(BOX *box1, BOX *box2); extern long box_right(BOX *box1, BOX *box2); extern long box_overright(BOX *box1, BOX *box2); extern long box_contained(BOX *box1, BOX *box2); extern long box_contain(BOX *box1, BOX *box2); extern long box_below(BOX *box1, BOX *box2); extern long box_above(BOX *box1, BOX *box2); extern long box_lt(BOX *box1, BOX *box2); extern long box_gt(BOX *box1, BOX *box2); extern long box_eq(BOX *box1, BOX *box2); extern long box_le(BOX *box1, BOX *box2); extern long box_ge(BOX *box1, BOX *box2); extern double *box_area(BOX *box); extern double *box_length(BOX *box); extern double *box_height(BOX *box); extern double *box_distance(BOX *box1, BOX *box2); extern Point *box_center(BOX *box); extern double box_ar(BOX *box); extern double box_ln(BOX *box); extern double box_ht(BOX *box); extern double box_dt(BOX *box1, BOX *box2); extern BOX *box_intersect(BOX *box1, BOX *box2); extern LSEG *box_diagonal(BOX *box); extern LINE *line_construct_pm(Point *pt, double m); extern LINE *line_construct_pp(Point *pt1, Point *pt2); extern long line_intersect(LINE *l1, LINE *l2); extern long line_parallel(LINE *l1, LINE *l2); extern long line_perp(LINE *l1, LINE *l2); extern long line_vertical(LINE *line); extern long line_horizontal(LINE *line); extern long line_eq(LINE *l1, LINE *l2); extern double *line_distance(LINE *l1, LINE *l2); extern Point *line_interpt(LINE *l1, LINE *l2); extern PATH *path_in(char *str); extern char *path_out(PATH *path); extern long path_n_lt(PATH *p1, PATH *p2); extern long path_n_gt(PATH *p1, PATH *p2); extern long path_n_eq(PATH *p1, PATH *p2); extern long path_n_le(PATH *p1, PATH *p2); extern long path_n_ge(PATH *p1, PATH *p2); extern long path_inter(PATH *p1, PATH *p2); extern double *path_distance(PATH *p1, PATH *p2); extern double *path_length(PATH *path); extern double path_ln(PATH *path); extern Point *point_in(char *str); extern char *point_out(Point *pt); extern Point *point_construct(double x, double y); extern Point *point_copy(Point *pt); extern long point_left(Point *pt1, Point *pt2); extern long point_right(Point *pt1, Point *pt2); extern long point_above(Point *pt1, Point *pt2); extern long point_below(Point *pt1, Point *pt2); extern long point_vert(Point *pt1, Point *pt2); extern long point_horiz(Point *pt1, Point *pt2); extern long point_eq(Point *pt1, Point *pt2); extern long pointdist(Point *p1, Point *p2); extern double *point_distance(Point *pt1, Point *pt2); extern double point_dt(Point *pt1, Point *pt2); extern double *point_slope(Point *pt1, Point *pt2); extern double point_sl(Point *pt1, Point *pt2); extern LSEG *lseg_in(char *str); extern char *lseg_out(LSEG *ls); extern LSEG *lseg_construct(Point *pt1, Point *pt2); extern void statlseg_construct(LSEG *lseg, Point *pt1, Point *pt2); extern long lseg_intersect(LSEG *l1, LSEG *l2); extern long lseg_parallel(LSEG *l1, LSEG *l2); extern long lseg_perp(LSEG *l1, LSEG *l2); extern long lseg_vertical(LSEG *lseg); extern long lseg_horizontal(LSEG *lseg); extern long lseg_eq(LSEG *l1, LSEG *l2); extern double *lseg_distance(LSEG *l1, LSEG *l2); extern double lseg_dt(LSEG *l1, LSEG *l2); extern Point *lseg_interpt(LSEG *l1, LSEG *l2); extern double *dist_pl(Point *pt, LINE *line); extern double *dist_ps(Point *pt, LSEG *lseg); extern double *dist_ppth(Point *pt, PATH *path); extern double *dist_pb(Point *pt, BOX *box); extern double *dist_sl(LSEG *lseg, LINE *line); extern double *dist_sb(LSEG *lseg, BOX *box); extern double *dist_lb(LINE *line, BOX *box); extern Point *interpt_sl(LSEG *lseg, LINE *line); extern Point *close_pl(Point *pt, LINE *line); extern Point *close_ps(Point *pt, LSEG *lseg); extern Point *close_pb(Point *pt, BOX *box); extern Point *close_sl(LSEG *lseg, LINE *line); extern Point *close_sb(LSEG *lseg, BOX *box); extern Point *close_lb(LINE *line, BOX *box); extern long on_pl(Point *pt, LINE *line); extern long on_ps(Point *pt, LSEG *lseg); extern long on_pb(Point *pt, BOX *box); extern long on_ppath(Point *pt, PATH *path); extern long on_sl(LSEG *lseg, LINE *line); extern long on_sb(LSEG *lseg, BOX *box); extern long inter_sl(LSEG *lseg, LINE *line); extern long inter_sb(LSEG *lseg, BOX *box); extern long inter_lb(LINE *line, BOX *box); extern void make_bound_box(POLYGON *poly); extern POLYGON *poly_in(char *s); extern long poly_pt_count(char *s, char delim); extern char *poly_out(POLYGON *poly); extern double poly_max(double *coords, int ncoords); extern double poly_min(double *coords, int ncoords); extern long poly_left(POLYGON *polya, POLYGON *polyb); extern long poly_overleft(POLYGON *polya, POLYGON *polyb); extern long poly_right(POLYGON *polya, POLYGON *polyb); extern long poly_overright(POLYGON *polya, POLYGON *polyb); extern long poly_same(POLYGON *polya, POLYGON *polyb); extern long poly_overlap(POLYGON *polya, POLYGON *polyb); extern long poly_contain(POLYGON *polya, POLYGON *polyb); extern long poly_contained(POLYGON *polya, POLYGON *polyb); /* geo_selfuncs.c */ extern float64 areasel(Oid opid, Oid relid, AttrNumber attno, char *value, int32 flag); extern float64 areajoinsel(Oid opid, Oid relid, AttrNumber attno, char *value, int32 flag); extern float64 leftsel(Oid opid, Oid relid, AttrNumber attno, char *value, int32 flag); extern float64 leftjoinsel(Oid opid, Oid relid, AttrNumber attno, char *value, int32 flag); extern float64 contsel(Oid opid, Oid relid, AttrNumber attno, char *value, int32 flag); extern float64 contjoinsel(Oid opid, Oid relid, AttrNumber attno, char *value, int32 flag); #endif /* GEO_DECLS_H */