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polygon.c
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polygon.c
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#include "polygon.h"
/* Polygon functions */
PG_FUNCTION_INFO_V1(spherepoly_in);
PG_FUNCTION_INFO_V1(spherepoly_equal);
PG_FUNCTION_INFO_V1(spherepoly_equal_neg);
PG_FUNCTION_INFO_V1(spherepoly_circ);
PG_FUNCTION_INFO_V1(spherepoly_npts);
PG_FUNCTION_INFO_V1(spherepoly_area);
PG_FUNCTION_INFO_V1(spherepoly_cont_point);
PG_FUNCTION_INFO_V1(spherepoly_cont_point_neg);
PG_FUNCTION_INFO_V1(spherepoly_cont_point_com);
PG_FUNCTION_INFO_V1(spherepoly_cont_point_com_neg);
PG_FUNCTION_INFO_V1(spherepoly_cont_circle);
PG_FUNCTION_INFO_V1(spherepoly_cont_circle_neg);
PG_FUNCTION_INFO_V1(spherepoly_cont_circle_com);
PG_FUNCTION_INFO_V1(spherepoly_cont_circle_com_neg);
PG_FUNCTION_INFO_V1(spherecircle_cont_poly);
PG_FUNCTION_INFO_V1(spherecircle_cont_poly_neg);
PG_FUNCTION_INFO_V1(spherecircle_cont_poly_com);
PG_FUNCTION_INFO_V1(spherecircle_cont_poly_com_neg);
PG_FUNCTION_INFO_V1(spherepoly_overlap_circle);
PG_FUNCTION_INFO_V1(spherepoly_overlap_circle_neg);
PG_FUNCTION_INFO_V1(spherepoly_overlap_circle_com);
PG_FUNCTION_INFO_V1(spherepoly_overlap_circle_com_neg);
PG_FUNCTION_INFO_V1(spherepoly_cont_line);
PG_FUNCTION_INFO_V1(spherepoly_cont_line_neg);
PG_FUNCTION_INFO_V1(spherepoly_cont_line_com);
PG_FUNCTION_INFO_V1(spherepoly_cont_line_com_neg);
PG_FUNCTION_INFO_V1(spherepoly_overlap_line);
PG_FUNCTION_INFO_V1(spherepoly_overlap_line_neg);
PG_FUNCTION_INFO_V1(spherepoly_overlap_line_com);
PG_FUNCTION_INFO_V1(spherepoly_overlap_line_com_neg);
PG_FUNCTION_INFO_V1(spherepoly_cont_poly);
PG_FUNCTION_INFO_V1(spherepoly_cont_poly_neg);
PG_FUNCTION_INFO_V1(spherepoly_cont_poly_com);
PG_FUNCTION_INFO_V1(spherepoly_cont_poly_com_neg);
PG_FUNCTION_INFO_V1(spherepoly_overlap_poly);
PG_FUNCTION_INFO_V1(spherepoly_overlap_poly_neg);
PG_FUNCTION_INFO_V1(spherepoly_cont_ellipse);
PG_FUNCTION_INFO_V1(spherepoly_cont_ellipse_neg);
PG_FUNCTION_INFO_V1(spherepoly_cont_ellipse_com);
PG_FUNCTION_INFO_V1(spherepoly_cont_ellipse_com_neg);
PG_FUNCTION_INFO_V1(sphereellipse_cont_poly);
PG_FUNCTION_INFO_V1(sphereellipse_cont_poly_neg);
PG_FUNCTION_INFO_V1(sphereellipse_cont_poly_com);
PG_FUNCTION_INFO_V1(sphereellipse_cont_poly_com_neg);
PG_FUNCTION_INFO_V1(spherepoly_overlap_ellipse);
PG_FUNCTION_INFO_V1(spherepoly_overlap_ellipse_neg);
PG_FUNCTION_INFO_V1(spherepoly_overlap_ellipse_com);
PG_FUNCTION_INFO_V1(spherepoly_overlap_ellipse_com_neg);
PG_FUNCTION_INFO_V1(spheretrans_poly);
PG_FUNCTION_INFO_V1(spheretrans_poly_inverse);
PG_FUNCTION_INFO_V1(spherepoly_add_point);
PG_FUNCTION_INFO_V1(spherepoly_add_points_finalize);
/*
* Writes "center" of a polygon into 'v'.
*
* v - pointer to the center of a polygon
* poly - pointer to the polygon
*/
static void
spherepoly_center(Vector3D *v, const SPOLY *poly)
{
int32 i;
Vector3D v1,
v2;
v1.x = 2.0;
v1.y = 2.0;
v1.z = 2.0;
v2.x = -2.0;
v2.y = -2.0;
v2.z = -2.0;
for (i = 0; i < poly->npts; i++)
{
spoint_vector3d(v, &poly->p[i]);
v1.x = Min(v->x, v1.x);
v1.y = Min(v->y, v1.y);
v1.z = Min(v->z, v1.z);
v2.x = Max(v->x, v2.x);
v2.y = Max(v->y, v2.y);
v2.z = Max(v->z, v2.z);
}
v->x = (v1.x + v2.x) / 2.0;
v->y = (v1.y + v2.y) / 2.0;
v->z = (v1.z + v2.z) / 2.0;
}
/*
* Checks if line segments cross.
*/
static bool
spherepoly_check(const SPOLY *poly)
{
int32 i,
k;
SLine sli,
slk;
Vector3D v;
SPoint p;
SEuler se;
int8 pos;
spherepoly_center(&v, poly);
/* If 0-vector */
if (FPzero(v.x) && FPzero(v.y) && FPzero(v.z))
{
return false;
}
for (i = 0; i < poly->npts; i++)
{
spoly_segment(&sli, poly, i);
for (k = (i + 1); k < poly->npts; k++)
{
spoly_segment(&slk, poly, k);
pos = sline_sline_pos(&sli, &slk);
if (!(pos == PGS_LINE_CONNECT || pos == PGS_LINE_AVOID))
{
return false;
}
}
}
vector3d_spoint(&p, &v);
se.phi_a = EULER_AXIS_Z;
se.theta_a = EULER_AXIS_X;
se.psi_a = EULER_AXIS_Z;
se.phi = -PIH - p.lng;
se.theta = p.lat - PIH;
se.psi = 0.0;
for (i = 0; i < poly->npts; i++)
{
euler_spoint_trans(&p, &poly->p[i], &se);
/* less _and_ equal are important !! */
/* Do not change it! */
if (FPle(p.lat, 0.0))
{
return false;
}
}
return true;
}
/*
* Converts an array of spherical points to SPOLY.
*
* arr - pointer to the array of spherical points
* nelem - number of the elements
*
* Returns the pointer to the created spherical polygon.
*/
static SPOLY *
spherepoly_from_array(SPoint *arr, int32 nelem)
{
SPOLY *poly = NULL;
if (nelem < 3)
{
elog(ERROR, "spherepoly_from_array: more than two points needed");
return NULL;
}
else
{
int32 i;
float8 scheck;
int32 size;
for (i = 0; i < nelem; i++)
{
spoint_check(&arr[i]);
}
/* check duplicate points */
i = 0;
while (i < (nelem - 1))
{
if (nelem < 3)
break;
if (spoint_eq(&arr[i], &arr[i + 1]))
{
if (i < (nelem - 2))
{
memmove((void *) &arr[i + 1],
(void *) &arr[i + 2],
(nelem - i - 2) * sizeof(SPoint));
}
nelem--;
continue;
}
i++;
}
if (spoint_eq(&arr[0], &arr[nelem - 1]))
{
nelem--;
}
if (nelem < 3)
{
elog(ERROR, "spherepoly_from_array: more than two points needed");
return NULL;
}
size = offsetof(SPOLY, p[0]) +sizeof(SPoint) * nelem;
poly = (SPOLY *) palloc(size);
SET_VARSIZE(poly, size);
poly->npts = nelem;
for (i = 0; i < nelem; i++)
{
if (i == 0)
{
scheck = spoint_dist(&arr[nelem - 1], &arr[0]);
}
else
{
scheck = spoint_dist(&arr[i - 1], &arr[i]);
}
if (FPeq(scheck, PI))
{
elog(ERROR, "spherepoly_from_array: a polygon segment length must be not equal 180 degrees.");
return NULL;
}
memcpy((void *) &poly->p[i],
(void *) &arr[i],
sizeof(SPoint));
}
}
if (!spherepoly_check(poly))
{
elog(ERROR, "spherepoly_from_array: a line segment overlaps or polygon too large");
pfree(poly);
return NULL;
}
return poly;
}
/*
* Performs a transform of a polygon using an Euler transformation.
*
* se - pointer to the Euler transformation
* in - pointer to the polygon
* out - pointer to the transformed polygon
*/
static void
euler_spoly_trans(SPOLY *out, const SPOLY *in, const SEuler *se)
{
int32 i;
out->size = in->size;
out->npts = in->npts;
for (i = 0; i < in->npts; i++)
euler_spoint_trans(&out->p[i], &in->p[i], se);
}
/*
* Returns the relationship between polygon and circle as
* PGS_CIRCLE_POLY_REL int8 value.
*/
static int8
poly_circle_pos(const SPOLY *poly, const SCIRCLE *circ)
{
int8 pos = 0;
int32 i;
SLine sl;
bool pcp;
const int8 sc_in = (1 << PGS_CIRCLE_CONT_LINE);
const int8 sc_ov = (1 << PGS_CIRCLE_LINE_OVER);
const int8 sc_os = (1 << PGS_CIRCLE_LINE_AVOID);
pcp = spoly_contains_point(poly, &circ->center);
if (FPzero(circ->radius))
{
if (pcp)
{
return PGS_POLY_CONT_CIRCLE;
}
else
{
return PGS_CIRCLE_POLY_AVOID;
}
}
for (i = 0; i < poly->npts; i++)
{
spoly_segment(&sl, poly, i);
pos |= (1 << sphereline_circle_pos(&sl, circ));
if (((pos & sc_in) && (pos & sc_os)) || (pos & sc_ov))
{
return PGS_CIRCLE_POLY_OVER;
/* overlaps */
}
}
if ((pos & sc_in) == pos)
{
/* all lines inside circle */
/* circle contains polygon */
return PGS_CIRCLE_CONT_POLY;
}
else if ((pos & sc_os) == pos)
{
/* all lines outside circle */
if (pcp)
{
/* polygon contains circle */
return PGS_POLY_CONT_CIRCLE;
}
else
{
/* circle outside polygon */
return PGS_CIRCLE_POLY_AVOID;
}
}
/* circle and polygon overlap */
return PGS_CIRCLE_POLY_OVER;
}
/*
* Returns the relationship between a polygon and an ellipse
* as PGS_ELLIPSE_POLY_REL int8 value.
*/
static int8
poly_ellipse_pos(const SPOLY *poly, const SELLIPSE *ell)
{
int8 pos = 0;
int32 i;
SLine sl;
bool pcp;
SPoint cen;
const int8 sc_in = (1 << PGS_ELLIPSE_CONT_LINE);
const int8 sc_ov = (1 << PGS_ELLIPSE_LINE_OVER);
const int8 sc_os = (1 << PGS_ELLIPSE_LINE_AVOID);
sellipse_center(&cen, ell);
pcp = spoly_contains_point(poly, &cen);
if (FPzero(ell->rad[0]))
{
if (pcp)
{
return PGS_POLY_CONT_ELLIPSE;
}
else
{
return PGS_ELLIPSE_POLY_AVOID;
}
}
if (FPzero(ell->rad[1]))
{
SLine l;
int8 res;
sellipse_line(&l, ell);
res = poly_line_pos(poly, &l);
if (res == PGS_LINE_POLY_AVOID)
{
return PGS_ELLIPSE_POLY_AVOID;
}
else if (res == PGS_POLY_CONT_LINE)
{
return PGS_POLY_CONT_ELLIPSE;
}
else
{
return PGS_ELLIPSE_POLY_OVER;
}
}
for (i = 0; i < poly->npts; i++)
{
spoly_segment(&sl, poly, i);
pos |= (1 << sellipse_line_pos(ell, &sl));
if (((pos & sc_in) && (pos & sc_os)) || (pos & sc_ov))
{
return PGS_ELLIPSE_POLY_OVER;
/* overlaps */
}
}
if ((pos & sc_in) == pos)
{
/* all lines inside ellipse */
/* ellipse contains polygon */
return PGS_ELLIPSE_CONT_POLY;
}
else if ((pos & sc_os) == pos)
{
/* all lines outside ellipse */
if (pcp)
{
/* polygon contains ellipse */
return PGS_POLY_CONT_ELLIPSE;
}
else
{
/* ellipse outside polygon */
return PGS_ELLIPSE_POLY_AVOID;
}
}
/* ellipse and polygon overlap */
return PGS_ELLIPSE_POLY_OVER;
}
/*
* Returns the relationship between two polygons as
* PGS_POLY_REL int8 value.
*
* p1 - pointer to the first polygon
* p2 - pointer to the second polygon
*
* If 'recheck' is true, swaps 'p1' and 'p2'.
*/
static int8
poly_poly_pos(const SPOLY *p1, const SPOLY *p2, bool recheck)
{
int32 i;
SLine sl;
int8 pos = 0,
res = 0;
const int8 sp_os = (1 << PGS_LINE_POLY_AVOID);
const int8 sp_ct = (1 << PGS_POLY_CONT_LINE);
const int8 sp_ov = (1 << PGS_LINE_POLY_OVER);
for (i = 0; i < p2->npts; i++)
{
spoly_segment(&sl, p2, i);
pos = (1 << poly_line_pos(p1, &sl));
if (pos == sp_ov)
{
return PGS_POLY_OVER;
/* overlap */
}
res |= pos;
}
if (res == sp_os)
{
if (!recheck)
{
pos = poly_poly_pos(p2, p1, true);
}
if (pos == PGS_POLY_CONT)
{
return PGS_POLY_OVER;
}
else
{
return PGS_POLY_AVOID;
}
}
if (res == sp_ct)
{
return PGS_POLY_CONT;
}
return PGS_POLY_OVER;
}
/*
* Checks whether two polygons are equal.
*
* If 'dir' is true, check with reverse polygon of 'p2'.
*/
bool
spoly_eq(const SPOLY *p1, const SPOLY *p2, bool dir)
{
bool ret = false;
if (p1->npts == p2->npts)
{
int32 i,
k,
cntr,
shift;
for (shift = 0; shift < p1->npts; shift++)
{
cntr = 0;
for (i = 0; i < p1->npts; i++)
{
k = (dir) ? (p1->npts - i - 1) : (i);
k += shift;
k = (k < p1->npts) ? (k) : (k - p1->npts);
if (spoint_eq(&p1->p[i], &p2->p[k]))
{
cntr++;
}
}
if (cntr == p1->npts)
{
ret = true;
break;
}
}
/* Try other direction if not equal */
if (!dir && !ret)
{
ret = spoly_eq(p1, p2, true);
}
}
return ret;
}
/*
* 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)
{
if (i >= 0 && i < poly->npts)
{
if (i == (poly->npts - 1))
sline_from_points(sl, &poly->p[i], &poly->p[0]);
else
sline_from_points(sl, &poly->p[i], &poly->p[i + 1]);
return true;
}
else
{
return false;
}
}
/*
* 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)
{
int32 i;
SLine sl;
bool res = false;
float8 scp;
Vector3D vc,
vp;
/* First check if point is outside polygon (behind) */
spherepoly_center(&vc, pg);
spoint_vector3d(&vp, sp);
scp = vector3d_scalar(&vp, &vc);
if (FPle(scp, 0.0))
{
return false;
}
/* Check whether point is edge */
for (i = 0; i < pg->npts; i++)
{
if (spoint_eq(&pg->p[i], sp))
{
return true;
}
}
/* Check whether point is on a line segment */
for (i = 0; i < pg->npts; i++)
{
spoly_segment(&sl, pg, i);
if (spoint_at_sline(sp, &sl))
{
return true;
}
}
do
{
SEuler se,
te;
SPoint p,
lp[2];
bool a1,
a2,
eqa;
int32 cntr = 0;
SPOLY *tmp = (SPOLY *) palloc(VARSIZE(pg));
/*
* Make a transformation, so the point is (0,0)
*/
se.phi_a = EULER_AXIS_Z;
se.theta_a = EULER_AXIS_X;
se.psi_a = EULER_AXIS_Z;
se.phi = PIH - sp->lng;
se.theta = -sp->lat;
se.psi = -PIH;
euler_spoly_trans(tmp, pg, &se);
p.lng = 0.0;
p.lat = 0.0;
/* Check whether an edge is on equator. */
/* If yes, rotate randomized around 0,0 */
cntr = 0;
do
{
eqa = false;
for (i = 0; i < pg->npts; i++)
{
if (FPzero(tmp->p[i].lat))
{
if (FPeq(cos(tmp->p[i].lng), -1.0))
{
return false;
}
else
{
eqa = true;
break;
}
}
}
if (eqa)
{
SPOLY *ttt = (SPOLY *) palloc(VARSIZE(pg));
srand(cntr);
se.phi_a = se.theta_a = se.psi_a = EULER_AXIS_X;
se.phi = ((double) rand() / RAND_MAX) * PID;
se.theta = 0.0;
se.psi = 0.0;
euler_spoly_trans(ttt, tmp, &se);
memcpy((void *) tmp, (void *) ttt, VARSIZE(pg));
pfree(ttt);
}
if (cntr > 10000)
{
elog(WARNING, "Bug found in spoly_contains_point");
elog(ERROR, "Please report it to pg_sphere team!");
return false;
}
cntr++;
} while (eqa);
/* Count line segment crossing "equator" */
cntr = 0;
for (i = 0; i < pg->npts; i++)
{
/* create a single line from segment */
spoly_segment(&sl, tmp, i);
sline_begin(&lp[0], &sl);
sline_end(&lp[1], &sl);
a1 = (FPgt(lp[0].lat, 0.0) && FPlt(lp[1].lat, 0.0));
a2 = (FPlt(lp[0].lat, 0.0) && FPgt(lp[1].lat, 0.0));
if (a1 || a2)
{
/* if crossing */
sphereline_to_euler_inv(&te, &sl);
if (a2)
{
/* crossing ascending */
p.lng = PID - te.phi;
}
else
{
p.lng = PI - te.phi;
}
spoint_check(&p);
if (p.lng < PI)
{
/* crossing between 0 and 180 deg */
cntr++;
}
}
}
pfree(tmp);
if (cntr % 2)
{
res = true;
}
} while (0);
return res;
}
/*
* 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)
{
int32 i;
SLine sl;
SPoint slbeg,
slend;
int8 p1,
p2,
pos,
res;
const int8 sl_os = (1 << PGS_LINE_AVOID);
const int8 sl_cl = (1 << PGS_LINE_CONT_LINE);
const int8 sl_cr = (1 << PGS_LINE_CROSS);
const int8 sl_cn = (1 << PGS_LINE_CONNECT);
const int8 sl_ov = (1 << PGS_LINE_OVER);
const int8 sl_eq = (1 << PGS_LINE_EQUAL);
pos = 0;
res = 0;
sline_begin(&slbeg, line);
sline_end(&slend, line);
p1 = spoly_contains_point(poly, &slbeg);
p2 = spoly_contains_point(poly, &slend);
for (i = 0; i < poly->npts; i++)
{
spoly_segment(&sl, poly, i);
pos = (1 << sline_sline_pos(&sl, line));
if (pos == sl_eq)
{
pos = sl_cl;
/* is contain */
}
if (pos == sl_ov)
{
return PGS_LINE_POLY_OVER;
/* overlap */
}
/* Recheck line crossing */
if (pos == sl_cr)
{
bool bal,
eal;
bal = spoint_at_sline(&slbeg, &sl);
eal = spoint_at_sline(&slend, &sl);
if (!bal && !eal)
{
return PGS_LINE_POLY_OVER;
/* overlap */
}
if ((bal && p2) || (eal && p1))
{
pos = sl_cl;
/* is contain */
}
else
{
return PGS_LINE_POLY_OVER;
/* overlap */
}
}
res |= pos;
}
if ((res & sl_cl) && ((res - sl_cl - sl_os - sl_cn - 1) < 0))
{
return PGS_POLY_CONT_LINE;
}
else if (p1 && p2 && ((res - sl_os - sl_cn - 1) < 0))
{
return PGS_POLY_CONT_LINE;
}
else if (!p1 && !p2 && ((res - sl_os - 1) < 0))
{
return PGS_LINE_POLY_AVOID;
}
return PGS_LINE_POLY_OVER;
}
Datum
spherepoly_in(PG_FUNCTION_ARGS)
{
SPOLY *poly;
char *c = PG_GETARG_CSTRING(0);
int32 i,
nelem;
void sphere_yyparse(void);
init_buffer(c);
sphere_yyparse();
nelem = get_path_count();
if (nelem > 2)
{
SPoint arr[nelem];
for (i = 0; i < nelem; i++)
{
get_path_elem(i, &arr[i].lng, &arr[i].lat);
}
poly = spherepoly_from_array(&arr[0], nelem);
}
else
{
reset_buffer();
elog(ERROR, "spherepoly_in: more than two points needed");
PG_RETURN_NULL();
}
reset_buffer();
PG_RETURN_POINTER(poly);
}
Datum
spherepoly_equal(PG_FUNCTION_ARGS)
{
SPOLY *p1 = PG_GETARG_SPOLY(0);
SPOLY *p2 = PG_GETARG_SPOLY(1);
PG_RETURN_BOOL(spoly_eq(p1, p2, false));
}
Datum
spherepoly_equal_neg(PG_FUNCTION_ARGS)
{
SPOLY *p1 = PG_GETARG_SPOLY(0);
SPOLY *p2 = PG_GETARG_SPOLY(1);
PG_RETURN_BOOL(!spoly_eq(p1, p2, false));
}
Datum
spherepoly_circ(PG_FUNCTION_ARGS)
{
SPOLY *poly = PG_GETARG_SPOLY(0);
int32 i;
SLine l;
float8 sum = 0.0;
for (i = 0; i < poly->npts; i++)
{
spoly_segment(&l, poly, i);
sum += l.length;
}
PG_RETURN_FLOAT8(sum);
}
Datum
spherepoly_npts(PG_FUNCTION_ARGS)
{
SPOLY *poly = PG_GETARG_SPOLY(0);
PG_RETURN_INT32(poly->npts);
}
Datum
spherepoly_area(PG_FUNCTION_ARGS)
{
SPOLY *poly = PG_GETARG_SPOLY(0);
int32 i;
SPoint s[poly->npts + 2];
SPoint stmp[2];
SEuler se;
float8 sum = 0.0;
memcpy((void *) &s[1],
(void *) &poly->p[0],
poly->npts * sizeof(SPoint));
memcpy((void *) &s[0], (void *) &s[poly->npts], sizeof(SPoint));
memcpy((void *) &s[poly->npts + 1], (void *) &s[1], sizeof(SPoint));
se.psi = 0;
se.phi_a = EULER_AXIS_Z;
se.theta_a = EULER_AXIS_X;
se.psi_a = EULER_AXIS_Z;
for (i = 1; i <= poly->npts; i++)
{
se.phi = -PIH - s[i].lng;
se.theta = s[i].lat - PIH;
euler_spoint_trans(&stmp[0], &s[i - 1], &se);
euler_spoint_trans(&stmp[1], &s[i + 1], &se);
stmp[1].lng -= stmp[0].lng;
if (FPlt(stmp[1].lng, 0.0))
{
stmp[1].lng += PID;
}
sum += stmp[1].lng;
}
sum -= (PI * (poly->npts - 2));
if (FPge(sum, PID))
{
sum = 2 * PID - sum;
}
if (FPzero(sum))
{
sum = 0.0;
}
PG_RETURN_FLOAT8(sum);
}
Datum
spherepoly_cont_point(PG_FUNCTION_ARGS)
{
SPOLY *poly = PG_GETARG_SPOLY(0);
SPoint *sp = (SPoint *) PG_GETARG_POINTER(1);
PG_RETURN_BOOL(spoly_contains_point(poly, sp));
}
Datum
spherepoly_cont_point_neg(PG_FUNCTION_ARGS)
{
SPOLY *poly = PG_GETARG_SPOLY(0);
SPoint *sp = (SPoint *) PG_GETARG_POINTER(1);
PG_RETURN_BOOL(!spoly_contains_point(poly, sp));
}
Datum
spherepoly_cont_point_com(PG_FUNCTION_ARGS)
{
SPOLY *poly = PG_GETARG_SPOLY(1);
SPoint *sp = (SPoint *) PG_GETARG_POINTER(0);
PG_RETURN_BOOL(spoly_contains_point(poly, sp));
}
Datum
spherepoly_cont_point_com_neg(PG_FUNCTION_ARGS)
{
SPOLY *poly = PG_GETARG_SPOLY(1);
SPoint *sp = (SPoint *) PG_GETARG_POINTER(0);
PG_RETURN_BOOL(!spoly_contains_point(poly, sp));
}
Datum
spherepoly_cont_circle(PG_FUNCTION_ARGS)
{
SCIRCLE *circ = (SCIRCLE *) PG_GETARG_POINTER(1);
SPOLY *poly = PG_GETARG_SPOLY(0);
PG_RETURN_BOOL(poly_circle_pos(poly, circ) == PGS_POLY_CONT_CIRCLE);
}
Datum
spherepoly_cont_circle_neg(PG_FUNCTION_ARGS)
{
SCIRCLE *circ = (SCIRCLE *) PG_GETARG_POINTER(1);
SPOLY *poly = PG_GETARG_SPOLY(0);
PG_RETURN_BOOL(poly_circle_pos(poly, circ) != PGS_POLY_CONT_CIRCLE);
}
Datum
spherepoly_cont_circle_com(PG_FUNCTION_ARGS)
{
SCIRCLE *circ = (SCIRCLE *) PG_GETARG_POINTER(0);
SPOLY *poly = PG_GETARG_SPOLY(1);