lw_dist2d_point_curvepoly()

int lw_dist2d_point_curvepoly	(	LWPOINT *	point,
		LWCURVEPOLY *	poly,
		DISTPTS *	dl
	)

Definition at line 672 of file measures.c.

{
        const POINT2D *p = getPoint2d_cp(point->point, 0);
 
        if (dl->mode == DIST_MAX)
                lwerror("lw_dist2d_point_curvepoly cannot calculate max distance");
 
        /* Return distance to outer ring if not inside it */
        if (lwgeom_contains_point(poly->rings[0], p) == LW_OUTSIDE)
                return lw_dist2d_recursive((LWGEOM *)point, poly->rings[0], dl);
 
        /* Inside the outer ring.
         * Scan though each of the inner rings looking to see if its inside.  If not, distance==0.
         * Otherwise, distance = pt to ring distance.
         */
        for (uint32_t i = 1; i < poly->nrings; i++)
                if (lwgeom_contains_point(poly->rings[i], p) == LW_INSIDE)
                        return lw_dist2d_recursive((LWGEOM *)point, poly->rings[i], dl);
 
        /* Is inside the polygon */
        dl->distance = 0.0;
        dl->p1.x = dl->p2.x = p->x;
        dl->p1.y = dl->p2.y = p->y;
        return LW_TRUE;
}

References DIST_MAX, DISTPTS::distance, getPoint2d_cp(), lw_dist2d_recursive(), LW_INSIDE, LW_OUTSIDE, LW_TRUE, lwerror(), lwgeom_contains_point(), DISTPTS::mode, LWCURVEPOLY::nrings, DISTPTS::p1, DISTPTS::p2, LWPOINT::point, LWCURVEPOLY::rings, POINT2D::x, and POINT2D::y.

Referenced by lw_dist2d_distribute_bruteforce().

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