circle_type closest_point2d_on_segment_ratio closest_point3dz_on_segment_ratio closest_point_on_segment_sphere datum2_geog_centroid datum2_geom_centroid datum2_point_eq datum2_point_ne datum2_point_nsame datum2_point_same datum_geog_distance datum_geom_distance2d datum_geom_distance3d datum_point4d datum_point_eq datum_point_same datum_pt_distance2d datum_pt_distance3d eacomp_tgeo_geo ensure_circle_type ensure_has_M_geo ensure_has_not_M_geo ensure_has_not_Z_geo ensure_has_Z_geo ensure_mline_type ensure_not_empty ensure_not_geodetic ensure_not_geodetic_geo ensure_point_type ensure_same_dimensionality ensure_same_dimensionality_geo ensure_same_dimensionality_tspatial_geo ensure_same_geodetic ensure_same_geodetic_geo ensure_same_geodetic_stbox_geo ensure_same_geodetic_tspatial_base ensure_same_geodetic_tspatial_geo ensure_same_spatial_dimensionality ensure_same_spatial_dimensionality_stbox_geo ensure_same_srid ensure_spatial_validity ensure_srid_is_latlong ensure_srid_known ensure_valid_geo_geo ensure_valid_spatial_stbox_stbox ensure_valid_stbox_geo ensure_valid_tgeo_geo ensure_valid_tgeo_stbox ensure_valid_tgeo_tgeo ensure_valid_tpoint_geo ensure_valid_tpoint_tpoint ensure_valid_tspatial_base ensure_valid_tspatial_geo ensure_valid_tspatial_tspatial geo_distance_fn geo_extract_elements geo_serialize geocircle_make geopoint_cmp geopoint_collinear geopoint_eq geopoint_make geopoint_same interpolate_point4d_spheroid lwcircle_make lwcoll_from_points_lines lwline_make lwpointarr_make_trajectory lwpointarr_remove_duplicates mline_type pointsegm_interpolate pointsegm_locate pointsegm_locate_point pt_distance_fn same_dimensionality_tspatial_geo same_spatial_dimensionality spatial_flags spheroid_init_from_srid TGEO_TO_TPOINT TGEOG_TO_TGEOM TGEOGP_TO_TGEOMP tgeogpointsegm_intersection TGEOM_TO_TGEOG TGEOMP_TO_TGEOGP tgeompointsegm_intersection tpoint_get_coord TPOINT_TO_TGEO tpointsegm_intersection_value tpointseq_stops_iter

closest_point3dz_on_segment_ratio() long double closest_point3dz_on_segment_ratio ( const POINT3DZ *  p, const POINT3DZ *  A, const POINT3DZ *  B, POINT3DZ *  closest  ) Return a long double between 0 and 1 representing the location of the closest point on the 3D segment to the given point, as a fraction of total segment length. Note Function derived from the PostGIS function closest_point_on_segment