lwcompound_contains_point()

int lwcompound_contains_point	(	const LWCOMPOUND *	comp,
		const POINT2D *	pt
	)

Definition at line 195 of file lwcompound.c.

{
        int intersections = 0;
 
        if (lwgeom_is_empty(lwcompound_as_lwgeom(comp)))
                return LW_OUTSIDE;
 
        for (uint32_t j = 0; j < comp->ngeoms; j++)
        {
                int on_boundary = LW_FALSE;
                const LWGEOM *sub = comp->geoms[j];
                if (sub->type == LINETYPE)
                {
                        LWLINE *lwline = lwgeom_as_lwline(sub);
                        intersections += ptarray_raycast_intersections(lwline->points, pt, &on_boundary);
                }
                else if (sub->type == CIRCSTRINGTYPE)
                {
                        LWCIRCSTRING *lwcirc = lwgeom_as_lwcircstring(sub);
                        intersections += ptarrayarc_raycast_intersections(lwcirc->points, pt, &on_boundary);
                }
                else
                {
                        lwerror("%s: unsupported type %s", __func__, lwtype_name(sub->type));
                }
                if (on_boundary)
                        return LW_BOUNDARY;
        }
 
        /*
         * Odd number of intersections means inside.
         * Even means outside.
         */
        return (intersections % 2) ? LW_INSIDE : LW_OUTSIDE;
}

References CIRCSTRINGTYPE, LWCOMPOUND::geoms, LINETYPE, LW_BOUNDARY, LW_FALSE, LW_INSIDE, LW_OUTSIDE, lwcompound_as_lwgeom(), lwerror(), lwgeom_as_lwcircstring(), lwgeom_as_lwline(), lwgeom_is_empty(), lwtype_name(), LWCOMPOUND::ngeoms, LWLINE::points, LWCIRCSTRING::points, ptarray_raycast_intersections(), ptarrayarc_raycast_intersections(), and LWGEOM::type.

Referenced by lwgeom_contains_point().

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