Return the values

getValues(tpose) → poseset

SELECT asText(getValues(tpose '{[Pose(Point(1 1), 0.3)@2001-01-01, 
  Pose(Point(1 1), 0.5)@2001-01-02)}'));
-- {"Pose(Point(1 1),0.3)","Pose(Point(1 1),0.5)"}
SELECT asEWKT(getValues(tpose 'SRID=5676;{[Pose(Point(1 1), 0.3)@2001-01-01, 
  Pose(Point(1 1), 0.3)@2001-01-02)}'));
-- SRID=5676;{"Pose(Point(1 1),0.3)"}

Return the points

points(tpose) → geomset

SELECT asEWKT(points(tpose 'SRID=5676;{Pose(Point(3 3), 0.3)@2001-01-01, 
  Pose(Point(1 1), 0.5)@2001-01-02}'));
-- SRID=5676;{Point(1 1), Point(3 3)}

Return the rotation

rotation(tpose2d) → tfloat

SELECT rotation(tpose 'SRID=5676;{[Pose(Point(1 1), 0.3)@2001-01-01,
  Pose(Point(1 1), 0.3)@2001-01-02)}');
-- {[0.3@2001-01-01, 0.3@2001-01-02)}

Return the value at a timestamp

valueAtTimestamp(tpose,timestamptz) → pose

SELECT asText(valueAtTimestamp(tpose '[Pose(Point(1 1), 0.3)@2001-01-01, 
  Pose(Point(3 3), 0.5)@2001-01-03)', '2001-01-02'));
-- Pose(Point(2 2),0.4)
SELECT asText(valueAtTimestamp(tpose 
  '[Pose(Point Z(1 1 1), 0.5, 0.5, 0.5, 0.5)@2001-01-01,
    Pose(Point Z(3 3 3), 1, 0, 0, 0)@2001-01-03)', timestamptz '2001-01-02'), 6);
-- Pose(POINT Z (2 2 2),0.866025,0.288675,0.288675,0.288675)

Return the speed of a temporal pose as a temporal float, the magnitude of the position-component velocity (distance travelled per unit time)

speed(tpose) → tfloat

The orientation is not considered; for angular velocity see angularSpeed.

SELECT asText(speed(tpose '[Pose(Point(0 0), 0)@2000-01-01 08:00,
  Pose(Point(1 1), 0.5)@2000-01-02 08:00]') * 3600);
-- Interp=Step;[1.414213562373095@2000-01-01, 1.414213562373095@2000-01-02]

The answer is given in the units of the SRID's CRS, which multiplied by 3600 in this case, corresponds to meters per hour.

Return the angular speed of a temporal pose as a step-interpolated temporal float (radians per unit time)

angularSpeed(tpose) → tfloat

For 2D poses this is the per-segment shortest-arc theta delta divided by the segment duration; for 3D poses it is the SLERP arc angle 2 · acos(|q1 · q2|) divided by the segment duration. SLERP is by construction constant-angular-velocity along a segment, so the result is piecewise-constant.

-- 90-degree yaw rotation over one day -> pi/2 rad / 86400 s
SELECT asText(angularSpeed(tpose
  '[Pose(Point(0 0 0), 1, 0, 0, 0)@2000-01-01,
    Pose(Point(0 0 0), 0.7071067811865476, 0, 0, 0.7071067811865475)@2000-01-02]'));
-- Interp=Step;[1.8181e-5@2000-01-01, 1.8181e-5@2000-01-02]