datum_collinear double2_collinear double3_collinear double4_collinear float_collinear intersection_tcontseq_tdiscseq intersection_tdiscseq_tcontseq intersection_tdiscseq_tdiscseq intersection_tinstant_tsequence intersection_tsequence_tinstant synchronize_tsequence_tsequence tbooldiscseq_from_base_time tboolseq_from_base tboolseq_from_base_time tboolseq_in tcontseq_at_period tcontseq_at_periodset1 tcontseq_at_timestamp tcontseq_at_timestampset tcontseq_delete_period tcontseq_delete_periodset tcontseq_delete_timestamp tcontseq_delete_timestampset tcontseq_find_timestamp tcontseq_insert tcontseq_minus_period tcontseq_minus_period1 tcontseq_minus_periodset1 tcontseq_minus_timestamp tcontseq_minus_timestamp1 tcontseq_minus_timestampset tcontseq_minus_timestampset1 tcontseq_restrict_minmax tcontseq_restrict_periodset tcontseq_restrict_value tcontseq_restrict_value1 tcontseq_restrict_values tdiscseq_at_period tdiscseq_at_timestamp tdiscseq_find_timestamp tdiscseq_from_base tdiscseq_from_base_time tdiscseq_merge_array tdiscseq_minus_period tdiscseq_minus_timestamp tdiscseq_restrict_minmax tdiscseq_restrict_periodset tdiscseq_restrict_timestampset tdiscseq_restrict_value tdiscseq_restrict_values tdiscseq_value_at_timestamp tfloatdiscseq_from_base_time tfloatsegm_intersection_value tfloatseq_from_base tfloatseq_from_base_time tfloatseq_in tfloatseq_span tfloatseq_spans tfloatseq_spanset tfloatseq_to_tintseq tgeogpointdiscseq_from_base_time tgeogpointseq_from_base tgeogpointseq_from_base_time tgeogpointseq_in tgeompointdiscseq_from_base_time tgeompointseq_from_base tgeompointseq_from_base_time tgeompointseq_in tinstant_to_tsequence tinstarr_normalize tintdiscseq_from_base_time tintseq_from_base tintseq_from_base_time tintseq_in tintseq_to_tfloatseq tlinearsegm_intersection_value tlinearseq_always_lt1 tlinearseq_ever_le1 tnumbercontseq_restrict_span tnumbercontseq_restrict_span2 tnumbercontseq_restrict_spanset tnumbercontseq_restrict_spanset1 tnumbercontseq_twavg tnumberdiscseq_restrict_span tnumberdiscseq_restrict_spanset tnumberdiscseq_twavg tnumbersegm_intersection tnumbersegm_restrict_span tnumberseq_integral tnumberseq_twavg tpointseq_make_coords tsegment_at_timestamp tsegment_intersection tsegment_restrict_value tsegment_value_at_timestamp tseqarr2_to_tseqarr tseqarr_normalize tsequence_always_eq tsequence_always_le tsequence_always_lt tsequence_append_tinstant tsequence_append_tsequence tsequence_at_period tsequence_at_timestamp tsequence_at_values1 tsequence_cmp tsequence_compact tsequence_copy tsequence_duration tsequence_end_timestamp tsequence_eq tsequence_ever_eq tsequence_ever_le tsequence_ever_lt tsequence_from_base tsequence_from_base_time tsequence_hash tsequence_in tsequence_inst_n tsequence_instants tsequence_join tsequence_join_test tsequence_make tsequence_make1 tsequence_make1_exp tsequence_make_exp tsequence_make_free tsequence_make_free_exp tsequence_make_valid tsequence_make_valid1 tsequence_max_instant tsequence_max_value tsequence_merge tsequence_merge_array tsequence_merge_array1 tsequence_min_instant tsequence_min_value tsequence_norm_test tsequence_offsets_ptr tsequence_out tsequence_segments tsequence_segments1 tsequence_sequences tsequence_set_bbox tsequence_set_period tsequence_shift_tscale tsequence_start_timestamp tsequence_time tsequence_timestamps tsequence_timestamps1 tsequence_to_string tsequence_to_tcontseq tsequence_to_tdiscseq tsequence_value_at_timestamp tsequence_values tsequenceset_to_tsequence tstepseq_to_linear tstepseq_to_linear1 ttextdiscseq_from_base_time ttextseq_from_base ttextseq_from_base_time ttextseq_in

tnumbersegm_intersection() static bool tnumbersegm_intersection ( const TInstant *  start1, const TInstant *  end1, const TInstant *  start2, const TInstant *  end2, TimestampTz *  t  ) static Compute the intersection, if any, of two segments of temporal sequences. These functions suppose that the instants are synchronized, i.e., start1->t = start2->t and end1->t = end2->t. The functions return true if there is an intersection at the middle of the segments, i.e., they return false if they intersect at a bound. If they return true, they also return in the output parameter t the intersection timestamp. The two values taken by the segments at the intersection timestamp t are equal up to the floating point precision. For the temporal point case we cannot use the PostGIS functions lw_dist2d_seg_seg and lw_dist3d_seg_seg since they do not take time into consideration and would return, e.g., that the two segments [Point(1 1)@t1, Point(3 3)@t2] and [Point(3 3)@t1, Point(1 1)@t2] intersect at Point(1 1), instead of Point(2 2). These functions are used to add intermediate points when lifting operators, in particular for temporal comparisons such as tfloat <comp> tfloat where <comp> is <, <=, ... since the comparison changes its value before/at/after the intersection point. Return true if two segments of two temporal numbers intersect at a timestamp Parameters [in] start1,end1 Temporal instants defining the first segment [in] start2,end2 Temporal instants defining the second segment [out] t Timestamp Precondition The instants are synchronized, i.e., start1->t = start2->t and end1->t = end2->t