getPoint2d_cp()

const POINT2D* getPoint2d_cp	(	const POINTARRAY *	pa,
		uint32_t	n
	)

Returns a pointer into the POINTARRAY serialized_ptlist, suitable for reading from.

Returns a POINT2D pointer into the POINTARRAY serialized_ptlist, suitable for reading from.

This is very high performance and declared const because you aren't allowed to muck with the values, only read them.

Definition at line 374 of file lwgeom_api.c.

{
        if ( ! pa ) return 0;
 
        if ( n>=pa->npoints )
        {
                lwerror("getPoint2d_cp: point offset out of range");
                return 0; /*error */
        }
 
        return (const POINT2D*)getPoint_internal(pa, n);
}

References getPoint_internal(), lwerror(), and POINTARRAY::npoints.

Referenced by _lwt_AddFaceSplit(), _lwt_AddPoint(), _lwt_CheckEdgeCrossing(), dbscan_update_context(), encode_ptarray(), geography_centroid_from_mline(), geography_centroid_from_mpoly(), geometry_to_path(), geometry_to_polygon(), geos_envelope_surrogate(), getPoint2d(), lw_curvering_getfirstpoint2d_cp(), lw_dist2d_fast_ptarray_ptarray(), lw_dist2d_line_curvepoly(), lw_dist2d_line_poly(), lw_dist2d_point_circstring(), lw_dist2d_point_curvepoly(), lw_dist2d_point_line(), lw_dist2d_point_point(), lw_dist2d_point_poly(), lw_dist2d_poly_poly(), lw_dist2d_pre_seg_seg(), lw_dist2d_pt_ptarray(), lw_dist2d_pt_ptarrayarc(), lw_dist2d_ptarray_ptarray(), lw_dist2d_ptarray_ptarrayarc(), lw_dist2d_ptarrayarc_ptarrayarc(), LWGEOM2GEOS(), lwgeom_cluster_2d_kmeans(), lwgeom_distance_spheroid(), lwgeom_remove_repeated_points_in_place(), lwgeom_simplify_in_place(), lwgeom_subdivide_recursive(), lwline_covers_lwline(), lwline_covers_lwpoint(), lwline_crossing_direction(), lwline_interpolate_points(), lwpoint_from_wkb_state(), lwpoint_inside_circle(), lwpoint_to_latlon(), lwpoly_covers_pointarray(), lwpoly_intersects_line(), lwt_ChangeEdgeGeom(), point_in_ring(), point_in_ring_rtree(), pointArray_svg_rel(), pointarray_to_encoded_polyline(), pointArray_to_geojson(), pointArray_toGML2(), pointArray_toGML3(), pt_in_ring_2d(), ptarray_arc_length_2d(), ptarray_area_sphere(), ptarray_calculate_gbox_geodetic(), ptarray_contains_point_partial(), ptarray_distance_spheroid(), ptarray_dp_findsplit_in_place(), ptarray_length_2d(), ptarray_locate_point(), ptarray_npoints_in_rect(), ptarray_remove_repeated_points_in_place(), ptarray_signed_area(), ptarray_to_GEOSCoordSeq(), ptarrayarc_contains_point_partial(), rect_leaf_node_distance(), rect_leaf_node_intersects(), rect_leaf_node_segment_side(), rect_node_leaf_new(), and rect_tree_get_point().

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