common_rid_tnpoint_npoint common_rid_tnpoint_npointset common_rid_tnpoint_tnpoint datum_npoint_round DatumGetNpointP DatumGetNsegmentP ensure_valid_tnpoint_geo ensure_valid_tnpoint_npoint ensure_valid_tnpoint_npointset ensure_valid_tnpoint_stbox ensure_valid_tnpoint_tnpoint GEOM_TO_NPOINT npoint_collinear npoint_set NPOINT_TO_GEOM npoint_wkt_out npointarr_geom NpointPGetDatum npointsegm_interpolate npointsegm_locate nsegment_set nsegmentarr_geom nsegmentarr_normalize NsegmentPGetDatum PG_GETARG_NPOINT_P PG_GETARG_NSEGMENT_P PG_RETURN_NPOINT_P PG_RETURN_NSEGMENT_P tgeompointinst_tnpointinst tgeompointseq_tnpointseq tgeompointseqset_tnpointseqset tnpoint_restrict_npoint tnpoint_restrict_npointset tnpoint_restrict_stbox tnpointinst_positions tnpointinst_route tnpointinst_routes tnpointinst_tgeompointinst tnpointseq_cont_routes tnpointseq_disc_routes tnpointseq_linear_positions tnpointseq_positions tnpointseq_tgeompointseq_cont tnpointseq_tgeompointseq_disc tnpointseqset_positions tnpointseqset_routes tnpointseqset_tgeompointseqset

npoint_collinear() bool npoint_collinear ( const Npoint *  np1, const Npoint *  np2, const Npoint *  np3, double  ratio  ) Return true if the three values are collinear. Parameters [in] np1,np2,np3 Input values [in] ratio Value in [0,1] representing the duration of the timestamps associated to np1 and np2 divided by the duration of the timestamps associated to np1 and np3